Journal articles: 'Complex geotechnical conditions'

1

Elmouttie, Marc, Jane Hodgkinson, and Peter Dean. "Prediction of Mining Conditions in Geotechnically Complex Sites." Mining 1, no. 3 (November 9, 2021): 279–96. http://dx.doi.org/10.3390/mining1030018.

Full text

Abstract:

Geotechnical complexity in mining often leads to geotechnical uncertainty which impacts both safety and productivity. However, as mining progresses, particularly for strip mining operations, a body of knowledge is acquired which reduces this uncertainty and can potentially be used by mining engineers to improve the prediction of future mining conditions. In this paper, we describe a new method to support this approach based on modelling and neural networks. A high-level causal model of the mining operations based on historical data for a number of parameters was constructed which accounted for parameter interactions, including hydrogeological conditions, weather, and prior operations. An artificial neural network was then trained on this historical data, including production data. The network can then be used to predict future production based on presently observed mining conditions as mining proceeds and compared with the model predictions. Agreement with the predictions indicates confidence that the neural network predictions are properly supported by the newly available data. The efficacy of this approach is demonstrated using semi-synthetic data based on an actual mine.

APA, Harvard, Vancouver, ISO, and other styles

2

Xiaolei, Yin. "Case study of geotechnical engineering investigation under complex geological conditions." Advance in Civil Engineering 2, no. 1 (2020): 26–31. http://dx.doi.org/10.35534/ace.0201005c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Benin, Andrey V., and Elena V. Gorodnova. "Geotechnical Analysis of Structural Behaviour Under Complex Geological Engineering Conditions." Procedia Engineering 189 (2017): 65–69. http://dx.doi.org/10.1016/j.proeng.2017.05.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Gao, Yan, Guihe Liang, and Yanyong Zhou. "Exploration of Geotechnical Engineering Investigation under Complex Topographical and Geological Conditions." Frontiers Research of Architecture and Engineering 2, no. 4 (December 25, 2019): 20. http://dx.doi.org/10.30564/frae.v2i4.1512.

Full text

Abstract:

This paper will explore the geotechnical engineering investigation technology under the complex topographical and geological conditions, and introduce how to construct the water supply tube wells faster and better under the complex topographical and geological conditions by taking Inner Mongolia as an example, so as to provide reference for the relevant professionals

APA, Harvard, Vancouver, ISO, and other styles

5

MULABDIĆ, Mensur, Krunoslav MINAŽEK, Marija LEKO-KOS, Želimir ORTOLAN, Jelena KALUÐER, and Jelena MATIJEVIĆ. "A case of complex geotechnical conditions for a water treatment facility." ce/papers 2, no. 2-3 (June 2018): 719–24. http://dx.doi.org/10.1002/cepa.755.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Zotsenko, M. L., Yu L. Vynnykov, М. O. Kharchenko, and І. I. Lartseva. "DESIGN PECULIARITIES OF OIL STORAGE TANKS IN COMPLEX GEOTECHNICAL CONDITIONS AT SEISMIC EFFECTS." ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 1, no. 48 (March 27, 2017): 175–82. http://dx.doi.org/10.26906/znp.2017.48.795.

Full text

Abstract:

Problematic issues of construction and operation of oil storage vertical steel tanks in complex geotechnical conditions, including the seismically unstable territories are systematized. The technique of seismic danger decreasing (increasing the seismic stability of the ground) for ensuring the accident-free operation of tanks during earthquakes of various intensities is proved. The practical experience of design solutions of the highly effective systems «man-made grounds – foundation – tank» in complex geotechnical conditions for static and dynamic effects (earthquakes, emergency technogenic loadings, etc.) is given.

APA, Harvard, Vancouver, ISO, and other styles

7

Yu, Wei Wei, and Xuan Guo. "Ground Adaptability Characterization for Digging in Complex Geotechnical Conditions and Risk Mitigation." Advanced Materials Research 415-417 (December 2011): 1431–34. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.1431.

Full text

Abstract:

Characterization of geotechnical digging and control the dynamical settlement is very necessary to mitigate construction risk. The metro tunnels of being constructed access to each other or near to the ground is high risk and physically difficult and costly. The control method becomes imperative. Some cases of digging prediction of ground movements and assessment of risk of damage to above or adjacent constructions have become an important issue especially in urban projec. Ground adaptability characterization is the key of control the tunneling in complex geotechnical conditions both in rock and soft stratum. High and changed water-soil pressure also is risk factors to effect tunneling process. Beside discussion of risk mitigation associate to tunnel construction, the developing settlement control and simulations are given to describe the methods of control risk.

APA, Harvard, Vancouver, ISO, and other styles

8

Vinod, J. S. "Dem Simulations in Geotechnical Earthquake Engineering Education." International Journal of Geotechnical Earthquake Engineering 1, no. 1 (January 2010): 61–69. http://dx.doi.org/10.4018/jgee.2010090804.

Full text

Abstract:

Behaviour of geotechnical material is very complex. Most of the theoretical frame work to understand the behaviour of geotechnical materials under different loading conditions depends on the strong background of the basic civil engineering subjects and advanced mathematics. However, it is fact that the complete behaviour of geotechnical material cannot be traced within theoretical framework. Recently, computational models based on Finite Element Method (FEM) are used to understand the behaviour of geotechnical problems. FEM models are quite complex and is of little interest to undergraduate students. A simple computational tool developed using Discrete Element Method (DEM) to simulate the laboratory experiments will be cutting edge research for geotechnical earthquake engineering education. This article summarizes the potential of DEM to simulate the cyclic triaxial behaviour of granular materials under complex loading conditions. It is shown that DEM is capable of simulating the cyclic behavior of granular materials (e.g. undrained, liquefaction and post liquefaction) similar to the laboratory experiments.

APA, Harvard, Vancouver, ISO, and other styles

9

Ivkovic, Mirko, and Mile Bugarin. "Technical solution of supporting the mining facilities in the complex geotechnical conditions." Rudarski radovi, Bor, no. 3 (2012): 287–94. http://dx.doi.org/10.5937/rudrad1203287i.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Wang, Ge. "Research on the Method of Ground Stress Balance under Complex Conditions Based on Geometric Tracing." Advances in Civil Engineering 2022 (May 14, 2022): 1–8. http://dx.doi.org/10.1155/2022/9359268.

Full text

Abstract:

The accuracy of the initial ground stress balance determines the accuracy of the finite element analysis of geotechnical problems. The traditional ground stress balance method has a good balance effect for simple geotechnical models but has strong limitations when the structure and soil interact with each other, the geometry of the model is complex, or the constraints are complicated. To deal with such problems, this paper proposes a general ground stress balance method based on geometric tracing by iteratively superimposing the static displacement field of the numerical model with the initial node coordinates of the numerical model. Two commonly used methods as well as the proposed method were tested with a model which contains both soil elements and structural elements and a case study. Test results show that the proposed method is capable of dealing with a complex model in which the commonly used methods fail to. Furthermore, the proposed ground stress balance method was demonstrated to be clear and has rapid convergence and high accuracy for complex stratum-structure geotechnical problems.

APA, Harvard, Vancouver, ISO, and other styles

11

Atkinson, M. S., and G. D. Thornton. "Groundwater Control in Complex Ground Conditions." Geological Society, London, Engineering Geology Special Publications 2, no. 1 (1986): 145–49. http://dx.doi.org/10.1144/gsl.1986.002.01.30.

Full text

Abstract:

AbstractTwo fifteen metre diameter ten metre deep underground tanks were constructed immediately alongside each other by sinking bolted segmental caissons and casting the secondary lining in situ. Preliminary site investigation indicated difficult ground conditions with a high risk of base failure for excavation in the dry. Wet construction of the base slab would avoid base instability but not the problem of hydrostatic uplift of the partially completed structures.Further investigation revealed a complex sequence of interbedded sands, silts and clays of alluvial and glacial origins. The granular horizons comprised a small number of thicker continuous bands, one occurring immediately below the proposed formation levels for the tank floor slabs, and several thinner irregular bands grading laterally into silts and clays.Piezometers in the more critical granular horizons indicated artesian and sub-artesian groundwater levels. Temporarily disconnecting at ground level the piezometer showing artesian conditions and measuring the resulting water flow indicated a granular body of restricted size or limited recharge. The absence of any effect on other piezometers offered confirmation of isolated granular bodies.Despite obvious difficulties in predicting the effectiveness of a groundwater lowering installation the significant advantages of constructing in the dry over wet construction mitigated in favour of dewatering. Sixteen deep pumped wells were installed around the circumference of the tanks to form a figure of eight pattern for the wells. To reduce the risk of a base failure due to artesian groundwater in any lobes of granular material encroaching within the plan excavation but not intersected by the pumped wells, four internal relief wells per tank were installed.Successful construction was achieved, although a minor interruption to the pumping clearly demonstrated the prudence of the internal relief well installation.The paper comments on some aspects of BS 5930 in relation to the construction described.

APA, Harvard, Vancouver, ISO, and other styles

12

Bredikhin, Vladimir, Vladimir Khaustov, and Dmitriy Melkumov. "Geotechnical monitoring during construction in difficult soil conditions." Journal of Applied Engineering Science 19, no. 2 (2021): 537–41. http://dx.doi.org/10.5937/jaes0-31438.

Full text

Abstract:

One of the common and at the same time most difficult problems that developers may face is unstable soil layer at the base of a future building. This paper describes problems of construction on weak, subsidence and heaving soils in engineering and geological conditions of Kursk city. Real problem of construction property safety is shown with the example of one of the demanding geomorphological and lithological conditions of urban areas. The paper offers a description of geologic and hydrogeological features of the slope rock mass in the right bank of the Tuskar river. Groundwater level lies at 8.7 m. depth. It is possible to predict an increase in the level of groundwater in building maintenance because this area is potentially flooded. Various engineering and geological processes and such phenomena as ground subsidence, Karst, suffosia, landslides, flooding, etc., can also be found in the studied territory. Initially an insufficient engineering-geomorphological, hydrogeological, ecological and engineering-geological study of hazardous areas in the city of Kursk have led to its problematic development, which illustrates the situation with residential real estate in the studied territory. To predict dangerous engineering-geological processes and ensure the reliability of the construction fund, specific proposals have been developed for the organization of a geotechnical monitoring system based on the optimal integration of geomorphological, geodesic, engineering-geological, hydrogeological and environmental construction methods in complex engineering-geological conditions.

APA, Harvard, Vancouver, ISO, and other styles

13

Santrač, Petar, and Željko Bajić. "Example of protection of deep foundation pit in complex urban and geotechnical conditions." Gradjevinski materijali i konstrukcije 61, no. 1 (2018): 161–78. http://dx.doi.org/10.5937/grmk1801161s.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Wang, Xue-yan, Yi-li Yuan, Chang-ming Hu, and Yuan Mei. "Research on the Geostatic Stress Field Procedure under Complex Conditions." Advances in Civil Engineering 2021 (April 17, 2021): 1–15. http://dx.doi.org/10.1155/2021/6674369.

Full text

Abstract:

Geostatic stress field procedure is the first and the most important step for the numerical simulation of geotechnical engineering, which greatly influences the simulation results. Traditional methods often fail when the model is complex. In this paper, based on finite element method (FEM) software ABAQUS, failure reasons of four commonly used methods for the geostatic stress field are studied. According to the analysis results, a new set of methods, which can provide reasonable displacement and stress field results under complex conditions, is proposed. The proposed methods follow the principle that the stress of different materials should be obtained separately to avoid stress distortion. Then, the accuracy and applicability of the proposed method are verified through a comparison study and a specific application. This study provides a theoretical basis for the method of geostatic stress field procedure under complex condition and can serve as a reference for relevant studies.

APA, Harvard, Vancouver, ISO, and other styles

15

Gil-Mastalerczyk, Joanna, and Regina Gil. "Difficult Geotechnical Conditions Under the Palace Complex, Case Study from Cianowice, Near Krakow, Poland." IOP Conference Series: Earth and Environmental Science 44 (October 2016): 022031. http://dx.doi.org/10.1088/1755-1315/44/2/022031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Angelova, Roumyana. "Engineering geological characteristics of Danube right bank between Kozloduy and Gorni Tsibar." Review of the Bulgarian Geological Society 81, no. 2 (2020): 13–25. http://dx.doi.org/10.52215/rev.bgs.2020.81.2.2.

Full text

Abstract:

The geotechnical properties of soils (clays of the Brusarci Formation and loess complex) spread over the area of Danube right bank between the town of Kozloduy and the village of Gorni Tsibar have been determined. Complex landslides and river erosion are the most important geodynamic processes in the study area. Engineering geological zoning has been carried out, with two separated zones. The second zone is characterized with most complicated geotechnical conditions due to distribution of both old landslides and recently landslide activation in some sub-zones.

APA, Harvard, Vancouver, ISO, and other styles

17

Sokolov, Nikolai S. "Ground Ancher Produced by Electric Discharge Technology, as Monolithic Reinforced Concrete Structure." Key Engineering Materials 771 (June 2018): 75–81. http://dx.doi.org/10.4028/www.scientific.net/kem.771.75.

Full text

Abstract:

The construction of territories with problematic engineering and geological conditions in the presence of unstable, crossed relief is a complex geotechnical task. Therefore, the main purpose of the work is to study the features of the ground anchor, which is made by electric discharge technology, as a monolithic reinforced concrete structure. The questions related to the provision of safe methods of construction and erection works for the erection of any facility in such territories are related to a multifactor problem connected, primarily with the need to develop special geotechnical technologies tied to real engineering and geological conditions, loads from previously erected buildings and structures and, secondly, the actual implementation of them on a particular construction site. The case considered in the article from the geotechnical practice of construction of the facility is confirmed by the fact that due to the availability of modern design and construction and construction works, it is possible to solve any complex problems related to the issues of ensuring the stability of slopes.

APA, Harvard, Vancouver, ISO, and other styles

18

Rudko, G. I., and Ye O. Yakovlev. "REGIONAL TECHNOGENIC CHANGES IN ECOGEODYNAMIC CONDITIONS OF THE DEVELOPMENT OF IRON ORE DEPOSITS IN KRYVBAS." Мінеральні ресурси України, no. 2 (July 25, 2018): 43–50. http://dx.doi.org/10.31996/mru.2018.2.43-50.

Full text

Abstract:

The article deals with the study of geotechnical conditions in Kryvbas. The major factors of technogenic changes in an ecological state of the geological environment during development of ferruginous quartzite deposits have been determined. The big mining complex in Kryvbas is a complex natural-technogenic geosystem with the mainly irreversible use of raw material resources the renewable ability of which is quite low. One of the main factors of the environmental impact of PGTS Kryvbas is the formation of signi

APA, Harvard, Vancouver, ISO, and other styles

19

Makarov, Vladimir, and Valery Makishin. "Megalopolises geotechnics." E3S Web of Conferences 56 (2018): 01012. http://dx.doi.org/10.1051/e3sconf/20185601012.

Full text

Abstract:

Necessity of formation of the uniform concept of maintenance of development of the megalopolises, combining building of aboveground and underground complexes is shown. Interaction of elements of geotechnical system ≪a megalopolis - an underground construction≫ with a view of maintenance of ability to live of underground constructions of megalopolises is considered. Classification of conditions of development of megalopolises by stage of use of the underground space, added with criteria of reliability, safety and an economic optimum is developed. Conditions of maintenance of ecological compatibility and infrastructural appeal of megalopolises, as centres of cultural and commercial development are considered. Necessity of formation of the general scientific discipline ≪Megalopolises Geotechnics≫, covering a complex of methods of aboveground and underground building of megalopolises taking into account reliability and safety of functioning, ecological compatibility, infrastructural appeal, and also an economic optimality answering to criterion is formulated.

APA, Harvard, Vancouver, ISO, and other styles

20

Sokolova, Olga, and Darya Trubina. "The Calibration of Parameters in Hardening Soil Model Based Odometer Tests." Applied Mechanics and Materials 633-634 (September 2014): 1058–64. http://dx.doi.org/10.4028/www.scientific.net/amm.633-634.1058.

Full text

Abstract:

Finite element method is often used to solving composite geotechnical problems. Application of these programs demands special attention for models for the setting parameters and simulation of soil behaviour. The problem of model selection to describe the behaviour of soils for calculation of settlement is considered in test task applied to complex geotechnical conditions of Saint-Petersburg. Comparison of obtained settlement values is carried out in Linear Elastic model, Mohr-Coulomb mode and, Hardening Soil model. The results of calibration of parameters for geotechnical model from the use of the qualities of odometer testing are shown.

APA, Harvard, Vancouver, ISO, and other styles

21

Zotsenko, М., Yu Vynnykov, М. Kharchenko, and І. Lartseva. "RELIABILITY CONTROL OF EXPLOITATION OF OIL STORAGE TANKS BASES IN COMPLEX GEOTECHNICAL CONDITIONS AT SEISMIC EFFECTS." Problems and prospects of oil and gas industry, no. 2 (December 6, 2018): 65–90. http://dx.doi.org/10.32822/naftogazscience.2018.02.065.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Clark, J. I., and J. Y. Guigné. "Twenty-fifth anniversary special paper: Marine geotechnical engineering in Canada." Canadian Geotechnical Journal 25, no. 2 (May 1, 1988): 179–98. http://dx.doi.org/10.1139/t88-023.

Full text

Abstract:

Marine geotechnical engineering in Canada is over one hundred years old, having started with overwater drilling and testing for bridges and nearshore structures. Its growth has been sporadic, with not much attention being directed to the geotechnical properties of marine soils until the late 1970's when design of artificial islands made up of large caissons started to develop. For about the last 15 years, marine geotechnical engineering has been driven by the oil and gas industry. Most of the action has been in the Beaufort Sea, where complex site conditions have necessitated detailed geotechnical field drilling, sampling programs, and in situ testing. Very little geotechnical engineering research work or site investigation has been carried out off the east coast except for the Hibernia site on the Grand Banks. In the coming years we can expect to see dramatic changes in site investigation methods. The use of robotics and expert systems coupled with innovative geophysical techniques could dramatically change our methods of site characterization and measurement of geotechnical properties. Key words: marine geotechnical engineering, Beaufort Sea, Grand Banks, Scotian Shelf, in situ testing, geophysical – geotechnical relationship, future trends.

APA, Harvard, Vancouver, ISO, and other styles

23

Kondratyev, S. A., G. R. Bochkaryov, and A. S. Izotov. "Conditions for the formation of a “particle-bubble” flotation complex." Journal of Mining Science 36, no. 2 (March 2000): 175–84. http://dx.doi.org/10.1007/bf02551798.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Izakson, V. Yu, A. V. Samokhin, and V. I. Sleptsov. "Support of a vertical-shaft collar under complex geocryological conditions." Journal of Mining Science 30, no. 6 (November 1994): 575–82. http://dx.doi.org/10.1007/bf02047325.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Vitali, Osvaldo, Tarcisio Barreto Celestino, and Antonio Bobet. "New modeling approach for tunnels under complex ground and loading conditions." Soils and Rocks 44, no. 1 (March 31, 2021): 1–8. http://dx.doi.org/10.28927/sr.2021.052120.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Zotsenko, Mykola, Yuriyvynnykov ., and Maksym Kharchenko. "Experience of Weak Soil Reinforcement by Soil-Cement Elements Manufactured by Deep Soil Mixing Technology." International Journal of Engineering & Technology 7, no. 3.2 (June 20, 2018): 486. http://dx.doi.org/10.14419/ijet.v7i3.2.14577.

Full text

Abstract:

Problematic issues of construction and operation in complex geotechnical conditions are systematized (subsiding and peaty soil, silt, filled, man-made soil, saturated, land sliding and seismically hazardous territories, densely developed areas) by the means of reinforcing soil massif by vertical soil-cement elements (SCE) using deep soil mixing (DSM) technology. The practical solution experience of highly efficient “man-made soil-cement base – foundation – structure” systems is shown by the example of complex geotechnical conditions under static and dynamic influences (including earthquakes and critical failure man-made loads), and excavation using SCE. A decreasing in a settlement of soil-cement bases of buildings by 2 – 4 times compared to natural soil massif and increasing in soil-cement mechanical features by 2.5 times has been established. The options of decreasing the seismic hazard (increasing the seismic stability of soil) for securing the emergency-free operation of oil storage vertical steel tank in case of the varying intensity earthquakes utilizing the man-made soil-cement base has been justified.

APA, Harvard, Vancouver, ISO, and other styles

27

Xia, Yingjie, Qingkun Meng, Chuanqing Zhang, Ning Liu, Zhenxing Zhao, Jun Chen, and Gao Yang. "Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses." Geofluids 2021 (October 13, 2021): 1–23. http://dx.doi.org/10.1155/2021/7278131.

Full text

Abstract:

In the engineering of underground construction, the discontinuous structures in rock mass have important influences on the mechanical behaviors of the subsurface of rock mass. The acquisition of mechanical parameters is the basis of rock mass engineering design, construction, safety, and stability evaluation. However, the mechanical parameters and failure characteristics of the same rock mass under different mechanical conditions cannot be obtained due to the limitations of specimen preparation techniques. In recent years, with the continuous development of 3D printing (3DP) technology, it has been successfully applied to the repetitive preparation of rock mass samples. The combinations of 3DP and other techniques, such as 3D scanning and CT scanning, provided a new approach to study the mechanical behavior of complex structural rock masses. In this study, through a comprehensive review of the technical progress, equipment situation, application fields, and challenges of the use of 3DP technology, the following conclusions were obtained: (1) 3DP technology has advantages over traditional rock mass specimen preparation techniques, and the verification of test results using 3D printed samples shows that the 3DP has broad application prospects in geotechnical engineering. (2) The combination of 3DP and other advanced techniques can be used to achieve the accurate reconstruction of complex structural rock masses and to obtain the mechanical and failure characteristics of the same rock mass structure under different mechanical boundary conditions. (3) The development of 3DP materials with high strength, high brittleness, and low ductility has become the major bottleneck in the application of 3DP in geotechnical engineering. (4) 3D printers need to meet the high precision and large size requirements while also having high strength and long-term printing ability. The development of 3D printers that can print different types of materials is also an important aspect of the application of 3DP in geotechnical engineering.

APA, Harvard, Vancouver, ISO, and other styles

28

Xia, Yingjie, Qingkun Meng, Chuanqing Zhang, Ning Liu, Zhenxing Zhao, Jun Chen, and Gao Yang. "Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses." Geofluids 2021 (October 13, 2021): 1–23. http://dx.doi.org/10.1155/2021/7278131.

Full text

Abstract:

In the engineering of underground construction, the discontinuous structures in rock mass have important influences on the mechanical behaviors of the subsurface of rock mass. The acquisition of mechanical parameters is the basis of rock mass engineering design, construction, safety, and stability evaluation. However, the mechanical parameters and failure characteristics of the same rock mass under different mechanical conditions cannot be obtained due to the limitations of specimen preparation techniques. In recent years, with the continuous development of 3D printing (3DP) technology, it has been successfully applied to the repetitive preparation of rock mass samples. The combinations of 3DP and other techniques, such as 3D scanning and CT scanning, provided a new approach to study the mechanical behavior of complex structural rock masses. In this study, through a comprehensive review of the technical progress, equipment situation, application fields, and challenges of the use of 3DP technology, the following conclusions were obtained: (1) 3DP technology has advantages over traditional rock mass specimen preparation techniques, and the verification of test results using 3D printed samples shows that the 3DP has broad application prospects in geotechnical engineering. (2) The combination of 3DP and other advanced techniques can be used to achieve the accurate reconstruction of complex structural rock masses and to obtain the mechanical and failure characteristics of the same rock mass structure under different mechanical boundary conditions. (3) The development of 3DP materials with high strength, high brittleness, and low ductility has become the major bottleneck in the application of 3DP in geotechnical engineering. (4) 3D printers need to meet the high precision and large size requirements while also having high strength and long-term printing ability. The development of 3D printers that can print different types of materials is also an important aspect of the application of 3DP in geotechnical engineering.

APA, Harvard, Vancouver, ISO, and other styles

29

Becker, Dennis E., WJ (Bill) Burwash, RA (Bob) Montgomery, and Y. (Bill) Liu. "Foundation design aspects of the Confederation Bridge." Canadian Geotechnical Journal 35, no. 5 (October 1, 1998): 750–68. http://dx.doi.org/10.1139/t98-038.

Full text

Abstract:

The Confederation Bridge is a 12.9 km long multi-span bridge spanning the Northumberland Strait to connect the provinces of Prince Edward Island and New Brunswick on the east coast of Canada. It is the longest continuous marine span bridge over ice-covered water in the world. The bridge is a design, build, operate, and transfer facility with the Government of Canada being the ultimate owner. Construction started in October 1993, and the bridge officially opened, on schedule, to traffic on June 1, 1997. The combination of deep water, high lateral and eccentric loads, complex geology and variable strength bedrock, and short construction window due to ice and bad weather introduced many foundation engineering challenges. This paper summarizes and discusses the geotechnical aspects of foundation design and construction monitoring services for the bridge. The geological setting and geotechnical conditions, the loading conditions and design criteria, specialized geotechnical analyses, foundation design, and construction quality assurance - quality control issues are described and discussed.Key words: Confederation Bridge, Northumberland Strait, foundation design, quality assurance, ring footing, drilled shafts.

APA, Harvard, Vancouver, ISO, and other styles

30

Zhongchao, He, and Zheng Xiao. "Geotechnical engineering investigation and analysis in the preliminary design stage of nuclear power plant under complex geological conditions." Advance in Civil Engineering 1, no. 1 (2019): 1–6. http://dx.doi.org/10.35534/ace.0101001c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Kudriavtcev, Sergei, and Viacheslav Kovshun. "The investigation of load-bearing capacity of soil base for oil pipeline depending on local geocryological conditions." MATEC Web of Conferences 265 (2019): 02019. http://dx.doi.org/10.1051/matecconf/201926502019.

Full text

Abstract:

Weak thawing soils around the metal piles pose the main danger when constructing oil pipelines or other engineering structures located in the cryolithozone. The occurrence of ice inside soil causes thermokarst dips and settlement while thawing. High-precision calculations of the load-bearing capacity of soils and accurate forecasts of the amount of thawing in summer are necessary for improving the reliability of engineering structures. Thermopiles are used to prevent thawing of soils around piles and thermally stabilize the permafrost condition. In this article, one of such decisions is considered on the example of oil pipeline along «Kuyumba – Taishet Kozmino» route in Russia. There are permafrost and deformations of the soil body in the base of oil pipeline. The proposed method implies the joint operation of holding soils in frozen state with help of season-cooling devices or thermopiles. It was concluded that special geotechnical engineering for permafrost projects is necessary to avoid the main problems. In order to achieve the goals of the present investigation, the geotechnical software complex «FEM-models» with «Termoground» was used.

APA, Harvard, Vancouver, ISO, and other styles

32

Cripps, J. C., P. B. Attewell, and J. P. Woodman. "Economic design of ground investigations for planning." Geological Society, London, Engineering Geology Special Publications 4, no. 1 (1987): 61–68. http://dx.doi.org/10.1144/gsl.eng.1987.004.01.05.

Full text

Abstract:

AbtractPlanning the development of an urban area is a complex operation in which many disparate objectives and constraints must be reconciled. An attempt is usually made to achieve particular aims at minimum cost. If geological and geotechnical factors are considered in isolation, then a particular structure will cost least to build in locations offering the most favourable ground conditions. Unfortunately, seldom is suitable geological and geotechnical information available at this early stage of development.The paper outlines a mechanism whereby reduction in the uncertainty about the ground conditions, achieved by carrying out site investigations work, may be related, through the application of simple probability theory, to a consequent expected loss caused by construction or maintenance. Thus in planning decisions a financial optimum can be identified in which the cost implications of ground investigations, construction and maintenance can be taken into account.

APA, Harvard, Vancouver, ISO, and other styles

33

Kumor, Maciej, Łukasz Kumor, and Joanna Farmas. "The analysis on the correlation parameters of the embankment compaction under in situ conditions." Budownictwo i Architektura 12, no. 3 (September 11, 2013): 097–104. http://dx.doi.org/10.35784/bud-arch.1995.

Full text

Abstract:

Geotechnical assessment of the implementation correctness of a road embankment wide range of issues, among which important selection and control of the quality of the earthworks are extremely significant. The article presents results of in situ tests determining correlations between the depending parameters defined by a static plate – VSS test – E1 and E2, and obtained from the study LFG Dynamic Load Plate. Studies indicate that the determination of the correlation between the parameters characterizing the particle size distribution (Cc, Cu, D10, D20, D30, D60), and the compaction parameters obtained by examining the compaction of sand embankment (Evd, E1, E2, I0) is physically complex and hence extremely difficult.

APA, Harvard, Vancouver, ISO, and other styles

34

Wyjadłowski, Marek, Janusz V. Kozubal, Zofia Zięba, Dmitri Steshenko, and Dariusz Krupowies. "Evaluation of Anthropogenic Substrate Variability Based on Non-Destructive Testing of Ground Anchors." Materials 14, no. 18 (September 7, 2021): 5131. http://dx.doi.org/10.3390/ma14185131.

Full text

Abstract:

The purpose of this paper is to describe the variability of soil rheological properties based on research carried out using load tests of ground anchors under complex geotechnical conditions. The heterogeneity of soil should always be considered when designing geotechnical constructions. In the present case, the earthwork created at the Warsaw Slope revealed an embankment of anthropogenic origin, located in a geologically and geomorphologically complex area of the Vistula valley slope. Excavation protection was anchored mainly in soils of anthropogenic origin. When the acceptance tests of the ground anchor were completed, the subsoil randomness was confirmed using nondirect, geostatistical methods. A standard solid rheological model with nonlinear fitting to the data was used. This model was established to describe the creeping activity of the ground anchor more accurately. The characteristics of man-made embankments were described using the parameters obtained with the rheological model of the subsoil.

APA, Harvard, Vancouver, ISO, and other styles

35

Volkov, S. N. "Hydrogeochemistry of Toxic Elements in Urbanized Geotechnical Systems." Water Quality Research Journal 32, no. 3 (August 1, 1997): 523–50. http://dx.doi.org/10.2166/wqrj.1997.030.

Full text

Abstract:

Abstract In urbanized geotechnical systems (UGSs), the majority of problems related to the ecological hydrochemistry of Cd, Pb, Ni and other heavy metals are the result of emergent characteristics of a system as a whole as opposed to individual pollution sources. In petrochemical UGSs, pollution of the environment from compounds containing methylating or alkylating agents results in an increase in the mobility of Cd, Pb, Ni, Cr and As. This process is controlled by environmental and microclimatic factors rather than by pollution sources. Under conditions of predominant dust and element effects, geo-chemically paradoxical associations of Cd with Ni, Mn and Cr can be formed in the main life support media in mining and metallurgical UGSs. Uncontrolled processes of hydrochemical interactions take place in complex multifunctional UGSs, leading to a change in speciation of heavy metals, particularly cadmium. This report is part of a 5-year study of the geotechnical systems in the Urals.

APA, Harvard, Vancouver, ISO, and other styles

36

Pham, Ngoc Anh, Piotr Osinski, Ngoc Anh Do, Eugeniusz Koda, Manh Van Nguyen, Duc Van Bui, and Ngan Van Tao. "Numerical modeling of slope stability incorporating complex reinforcement solution in high-risk failure area- unusual case study." Journal of Mining and Earth Sciences 62, no. 6 (December 31, 2021): 48–57. http://dx.doi.org/10.46326/jmes.2021.62(6).07.

Full text

Abstract:

The rapid economic development of Vietnam triggers a number of challenges in all sectors including infrastructure design and execution. New development plans and lack of space in densely populated and economically valuable areas creates a need for complex engineering solutions to meet the demand. The present research is a case study investigating reengineered vast natural slope to meet all requirements for geotechnical safety such as maximum displacements and factor of safety. Complex ground conditions and significant dimensions of the slope made the entire structure very likely to cause major risk for the future development plan of the site. Due to complex conditions, the slope was divided into 4 main sections. Each section was reinforced using a combination of soil nails, ground anchors, drainage systems and micro piles, of 19m for a single pile. Due to very much limited space available new geometry of the slope was designed for inclination reaching 1:0.3. Based on numerical modelling and computation the results revealed that the maximum lateral displacements felt in a range of 37-50x10-3 m and the factor of safety was 1.56-1.65, depending on a section and analysed scenario. The computations allowed proposing combined geotechnical solutions for very much challenging sites, assuring high safety standards and fitting the entire design within a limited available area.

APA, Harvard, Vancouver, ISO, and other styles

37

Kudryavtsev, Sergey, Semen Bugunov, Evgeniya Pogulyaeva, Anastasiya Peters, Zhanna Kotenko, and Danil Grigor'yev. "Construction of high-rise buildings in the Far East of Russia." E3S Web of Conferences 33 (2018): 02008. http://dx.doi.org/10.1051/e3sconf/20183302008.

Full text

Abstract:

The construction of high-rise buildings on plate foundation in geotechnical conditions of the Russian Far East is a complicated problem. In this respect foundation engineering becomes rather essential. In order to set a firm foundation it is necessary to take into account the pressure distribution at the structure base, in homogeneity of building deformation, which is due to collaborative geotechnical calculations complicated by a number of factors: actual over-placement of soils, the complex geometry of the building under construction, spatial work of the foundation ground with consideration for physical nonlinearity, the influence of the stiffness of the superstructure (reinforced concrete framing) upon the development of foundation deformations, foundation performance (the performance of the bed plate under the building and stairwells), the origination of internal forces in the superstructure with differential settlement. The solution of spatial problems regarding the mutual interaction between buildings and foundations with account of the factors mentioned above is fully achievable via the application of numerical modeling methodology. The work makes a review of the results of high-rise plate building numerical modeling in geotechnical conditions of the Russian Far East by way of the example of Khabarovsk city.

APA, Harvard, Vancouver, ISO, and other styles

38

Smaga, Agnieszka. "Analysis of Prognosis of Lowland River Bed Erosion Based on Geotechnical Parameters." Studia Geotechnica et Mechanica 37, no. 4 (December 1, 2015): 57–63. http://dx.doi.org/10.1515/sgem-2015-0045.

Full text

Abstract:

Abstract The river erosion is a complex process, the dynamics of which is very difficult to predict. Its intensity largely depends on hydraulic conditions of the river channel. However, it is also thought that natural resistance of the subsoil has a great influence on the scale of the erosion process. Predicting the effects of this process is extremely important in the case of constructing a piling structure (for example, artificial reservoirs). The partition of the river channel causes significant lowering of the river channel bed downstream the dam which threatens the stability of hydro technical and engineering (bridges) buildings. To stop this unwanted phenomenon, stabilizing thresholds are built. However, random location of thresholds significantly reduces their effectiveness. Therefore, taking under consideration natural geotechnical conditions of the subsoil appears to be extremely important. In the light of the current development of in-situ tests in geotechnics, an attempt to use results from these tests to predict the bed erosion rate was made. The analysis includes results from CPTU and DPL tests, which were carried out in the Warta River valley downstream the Jeziorsko reservoir. In the paper, the general diagrams for the procedure of obtaining and processing the data are shown. As a result, the author presents two multidimensional bed erosion rate models built based on hydraulic data and results from CPTU or DPL tests. These models allow taking more effective actions, leading to the neutralization of the effects of the intensive bed erosion process.

APA, Harvard, Vancouver, ISO, and other styles

39

Sang, Yong, and Long Tan Shao. "Studies on the Bidirectional Exciting Control for the Seismic Analysis of the Soil Mechanics." Key Engineering Materials 439-440 (June 2010): 811–17. http://dx.doi.org/10.4028/www.scientific.net/kem.439-440.811.

Full text

Abstract:

According to the seismic analysis of the soil mechanics for the major and complex geotechnical engineering projects such as highway, high-speed railway, subway, dams and so on, there is acute lack testing instrument considering the level earthquake load and the vertical earthquake load. In order to resolve this problem a new design plan is putted forward in this paper, which can generate bidirectional exciting force with designed amplitude ratio, phase and waveform. The radial exciting subsystem (water pressure) and the axial exciting subsystem (force) are both built by the hydraulic servo systems. The two subsystems have excellent dynamic response characteristics. Several key technical issues existing in bidirectional exciting control have been discussed in detail such as: (1) high-precision unconventional bidirectional exciting control strategy; (2) decoupling control methods in the bidirectional exciting process; (3) real-time compensation by using digital image technology. The instrument will provide advanced test conditions for the complex geotechnical engineering.

APA, Harvard, Vancouver, ISO, and other styles

40

Li, An-Jui, Abdoulie Fatty, and I.-Tung Yang. "Use of Evolutionary Computation to Improve Rock Slope Back Analysis." Applied Sciences 10, no. 6 (March 16, 2020): 2012. http://dx.doi.org/10.3390/app10062012.

Full text

Abstract:

Generally, in geotechnical engineering, back analyses are used to investigate uncertain parameters. Back analyses can be undertaken by considering known conditions, such as failure surfaces, displacements, and structural performances. Many geotechnical problems have irregular solution domains, with the objective function being non-convex, and may not be continuous functions. As such, a complex non-linear optimization function is typically required for most geotechnical problems to attain a better understanding of these uncertainties. Therefore, particle swarm optimization (PSO) and a genetic algorithm (GA) are utilized in this study to facilitate in back analyses mainly based on upper bound finite element limit analysis method. These approaches are part of evolutionary computation, which is appropriate for solving non-linear global optimization problems. By using these techniques with upper-bound finite element limit analysis (UB-FELA), two case studies showed that the results obtained are reasonable and reliable while maintaining a balance between computational time and accuracy.

APA, Harvard, Vancouver, ISO, and other styles

41

Watson, Julian Matthew, Abouzar Vakili, and Mateusz Jakubowski. "Rock Strength Anisotropy in High Stress Conditions: A Case Study for Application to Shaft Stability Assessments." Studia Geotechnica et Mechanica 37, no. 1 (March 1, 2015): 115–25. http://dx.doi.org/10.1515/sgem-2015-0013.

Full text

Abstract:

Abstract Although rock strength anisotropy is a well-known phenomenon in rock mechanics, its impact on geotechnical design is often ignored or underestimated. This paper explores the concept of anisotropy in a high stress environment using an improved unified constitutive model (IUCM), which can account for more complex failure mechanisms. The IUCM is used to better understand the typical responses of anisotropic rocks to underground mining. This study applies the IUCM to a proposed rock shaft located in high stress/anisotropic conditions. Results suggest that the effect of rock strength anisotropy must be taken into consideration when assessing the rock mass response to mining in high stress and anisotropic rock conditions.

APA, Harvard, Vancouver, ISO, and other styles

42

Zhao, Lei, Yifei Yan, and Xiangzhen Yan. "A novel risk analysis approach of casing under complex conditions using copulas." Journal of Petroleum Science and Engineering 189 (June 2020): 106955. http://dx.doi.org/10.1016/j.petrol.2020.106955.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Kosar, Keith, Ryan Phillips, Dennis Becker, and Jim Turnham. "Physical Modeling of Foundations for Northumberland Strait Crossing." Transportation Research Record: Journal of the Transportation Research Board 1582, no. 1 (January 1997): 8–12. http://dx.doi.org/10.3141/1582-02.

Full text

Abstract:

The 13-km-long Northumberland Strait Crossing will become the longest continuous marine span bridge in Canada. The marine and navigational spans of the bridge will be supported by 44 precast concrete piers founded on bedrock using ring-shaped footings in a maximum water depth of 35 to 40 m. Bedrock stratigraphy ranges from massive strong sandstone to a variable sequence of thinly bedded weak mudstones and siltstones. Foundation conditions vary significantly from pier to pier and in several cases can vary through the vertical and lateral extent of a particular foundation. In addition to the complex foundation conditions, the large horizontal environmental loadings on each pier must be considered in the geotechnical analyses. Reduced-scale physical model tests of selected marine piers on a centrifuge investigated potential mechanisms of failure and examined how these mechanisms varied with loading and foundation conditions. The results of the experimental program were used in conjunction with analytical results to enhance the fundamental understanding of the geotechnical aspects of foundation design and have led to an improved design methodology.

APA, Harvard, Vancouver, ISO, and other styles

44

Rasskazov, I. Yu, G. A. Kursakin, M. I. Potapchuk, V. I. Miroshnikov, A. M. Freidin, and S. P. Osadchy. "Geomechanical assessment of deep-level mining conditions in the Yuzhnoe complex ore deposit." Journal of Mining Science 48, no. 5 (September 2012): 874–81. http://dx.doi.org/10.1134/s1062739148050127.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Cała, Marek, Katarzyna Cyran, Joanna Jakóbczyk, and Michał Kowalski. "The Challenges of Open-Pit Mining in the Vicinity of the Salt Dome (Bełchatów Lignite Deposit, Poland)." Energies 13, no. 8 (April 14, 2020): 1913. http://dx.doi.org/10.3390/en13081913.

Full text

Abstract:

The extraction of the Bełchatów lignite deposit located in the vicinity of the Dębina salt dome requires careful planning that considers the influence of mining projects on the slope and salt dome stability conditions. The instability problem is directly related to horizontal and vertical displacement, as well as the complex geological and mining conditions. These conditions are very unique with regard to the co-occurrence of the salt dome and lignite deposits in the same area, as well as the large scale of the pit wall slope. Thus, predicting rock mass behavior and ensuring the safety of mining operations are important issues. The presented analysis focused on the influence of long-term lignite extraction on the western pit wall slope of the Bełchatów field and the salt dome’s stability conditions. This study offers a comprehensive approach to a complex geotechnical problem defined by large-scale, complex geometry, and geological conditions. The rock mass behavior and stress conditions are simulated in numerical modelling. The results of the presented analysis will be useful not only for present mining activities but also for future developments related to post-mining and recultivation plans.

APA, Harvard, Vancouver, ISO, and other styles

46

Gong, Yi, Yang Liu, and Qigao Li. "Long-Distance Pipe Jacking in Complex Urban Geological Environment." Journal of Architectural Research and Development 6, no. 1 (January 12, 2022): 7–12. http://dx.doi.org/10.26689/jard.v6i1.2888.

Full text

Abstract:

A steel underground pipeline with a diameter of 2.4 m and a total length of 3,617 m (plate thickness of 26 mm) has been constructed in a city in central Hubei, and the engineering, procurement, and construction (EPC) project has been lifted from the upstream channel to supplement water to the downstream lake inside the city. Through preliminary geological survey data, site topographic and geomorphic survey, urban construction, as well as the requirements of the construction party, the preliminary arrangement of working wells and receiving wells as well as the selection and customization of pipe jacking machines have been proposed. Frequency conversion motor and remote monitoring technology are adopted for geotechnical change and long-distance pipe jacking. Through detailed survey, the rock and soil change section as well as gradual change conditions have been determined, the accuracy of construction mechanics calculation and construction operation control have improved, the basis and analysis basis are provided, and some experiences in construction operation are summarized.

APA, Harvard, Vancouver, ISO, and other styles

47

Cao, Yanbo, Xinghua Zhu, Bangxiao Liu, and Yalin Nan. "A Qualitative Study of the Critical Conditions for the Initiation of Mine Waste Debris Flows." Water 12, no. 6 (May 28, 2020): 1536. http://dx.doi.org/10.3390/w12061536.

Full text

Abstract:

Mine waste debris flows are a type of man-made debris flow that commonly lead to major disasters. In this study, the Xiaotong Gully, which is located in the Xiaoqinling gold mining area in China and contains a typical mine waste debris flow gully, was selected as the study area. Since a debris flow can be classified as either a geotechnical debris flow or hydraulic debris flow based on its initiation mode, we conducted 46 experimental model tests to explore the initiation conditions of these two different types of debris flows. According to our tests, the initiation conditions of hydraulic debris flows were mainly affected by the flume gradient, the water content of the mine waste, the inflow discharge, the water supply modes, and the clay particle content. A larger flume gradient and higher mine waste water content were more conducive to initiating a hydraulic debris flow. However, the influence of the water supply mode on the initiation of a hydraulic debris flow was complex (influenced by factors such as water content of mine waste, runoff discharge rate and rainfall intensity). The critical runoff of a hydraulic debris flow, which starts with a parabolic relationship to the clay particle content of the mine waste, decreased with increasing clay particle content and then increased. There was a minimum critical runoff when the clay content of the mine waste was 30%. The initiation conditions of a geotechnical debris flow were mainly affected by the flume gradient, the water content, and the clay particle content. The critical gradient of a geotechnical debris flow decreased with increasing water content and had a parabolic relationship to the clay particle content. In tests 31–46 of this study, the second and third critical slopes both decreased and then increased with increasing clay particle content. These preliminary research results provide a scientific reference for subsequent research on the prevention and mitigation of mine waste debris flows.

APA, Harvard, Vancouver, ISO, and other styles

48

Mayne, Paul W., and Chris Dumas. "Enhanced in Situ Geotechnical Testing for Bridge Foundation Analysis." Transportation Research Record: Journal of the Transportation Research Board 1569, no. 1 (January 1997): 26–35. http://dx.doi.org/10.3141/1569-04.

Full text

Abstract:

Geotechnical analyses of bridge foundations are complex because of the difficulties in addressing the highly nonlinear and anisotropic stress-strain-strength-time behavior of soils, from the nondestructive small-strain range region through to failure conditions. Often engineering practice overrelies on a single test value from soil borings [the standard penetration test (SPT) N-value] for the evaluation of all necessary geotechnical parameters, which is unrealistic. There exists, in fact, a variety of in situ measurement devices for the better definition of soil engineering properties, particularly hybrid devices such as the seismic piezocone and seismic flat dilatometer, as related to foundation applications. The importance of small-strain field stiffness measurements (i.e., shear wave velocity) is discussed and illustrated with two case studies involving the axial response of drilled shaft and driven pile foundations. The examples are reviewed within the context of elastic continuum theory but may be applied similarly for use in site-specific determinations of nonlinear spring constants and well-known t-z, p-y, or q-z curves, or all three.

APA, Harvard, Vancouver, ISO, and other styles

49

Marčić, Danijela, Anita Cerić, and Meho Saša Kovačević. "SELECTION OF A FIELD TESTING METHOD FOR KARST ROCK MASS DEFORMABILITY BY MULTI CRITERIA DECISION ANALYSIS." Journal of Civil Engineering and Management 19, no. 2 (April 18, 2013): 196–205. http://dx.doi.org/10.3846/13923730.2012.743927.

Full text

Abstract:

The rock mass deformation modulus is an essential parameter for any numerical analysis and prediction of deformation in geotechnical engineering. Experience acquired using a large number of geotechnical projects in Croatia and the world indicates a somewhat unreliable determination of rock mass deformability based on correlation of classification results. The method of field testing for deformability can provide a more reliable insight into rock mass behaviour under loading conditions. The paper presents the most frequently used methods for field testing rock deformability. The benefits and disadvantages are shown of each particular method used in determining criteria and forming a ranking list of test methods using the multi criteria decision analysis. This ranking list of terrain testing for the rock mass stiffness is acquired on the basis of set criteria, assumes guidelines for compiling an exploratory works plan necessary for designing complex geotechnical structures in karst. Appropriate analyses of the sensitivity to changes in the significance of particular criteria was carried out including its effect on selecting the field method for testing karst rock mass deformability.

APA, Harvard, Vancouver, ISO, and other styles

50

Zhao, Tongbin, Zhenyu Zhang, Yunliang Tan, Chengzhong Shi, Ping Wei, and Quan Li. "An innovative approach to thin coal seam mining of complex geological conditions by pressure regulation." International Journal of Rock Mechanics and Mining Sciences 71 (October 2014): 249–57. http://dx.doi.org/10.1016/j.ijrmms.2014.05.021.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Complex geotechnical conditions'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles