Zeitschriftenartikel: „Geotechnical methods“

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CARR, J. R. „Probabilistic Methods in Geotechnical Engineering“. Environmental & Engineering Geoscience I, Nr. 1 (01.03.1995): 122–23. http://dx.doi.org/10.2113/gseegeosci.i.1.122.

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Hrubesova, Eva, und Marek Mohyla. „Back Analysis Methods in Geotechnical Engineering“. Advanced Materials Research 1020 (Oktober 2014): 423–28. http://dx.doi.org/10.4028/www.scientific.net/amr.1020.423.

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The paper deals with the back analysis method in geotechnical engineering, that goal is evaluation the more objective and reliable parameters of the rock mass on the basis of in-situ measurements. Stress, deformational, strength and rheological parameters of the rock mass are usually determined by some inaccuracies and errors arising from the complexity and variability of the rock mass. This higher or lower degree of imprecision is reflected in the reliability of the mathematical modelling results. The paper presents the utilization of direct optimization back analysis method, based on the theory of analytical functions of complex variable and Kolosov-Muschelischvili relations, to the evaluation of initial stress state inside the rock massif.

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Yuen, Ka-Veng, Jianye Ching und Kok-Kwang Phoon. „Bayesian Learning Methods for Geotechnical Data“. ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering 7, Nr. 1 (März 2021): 02020002. http://dx.doi.org/10.1061/ajrua6.0001102.

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4

Pieczyńska-Kozłowska, Joanna M. „Comparison Between Two Methods for Estimating the Vertical Scale of Fluctuation for Modeling Random Geotechnical Problems“. Studia Geotechnica et Mechanica 37, Nr. 4 (01.12.2015): 95–103. http://dx.doi.org/10.1515/sgem-2015-0049.

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Abstract The design process in geotechnical engineering requires the most accurate mapping of soil. The difficulty lies in the spatial variability of soil parameters, which has been a site of investigation of many researches for many years. This study analyses the soil-modeling problem by suggesting two effective methods of acquiring information for modeling that consists of variability from cone penetration test (CPT). The first method has been used in geotechnical engineering, but the second one has not been associated with geotechnics so far. Both methods are applied to a case study in which the parameters of changes are estimated. The knowledge of the variability of parameters allows in a long term more effective estimation, for example, bearing capacity probability of failure.

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Muszynski, Mark R. „Incorporating Reliability Methods into Geotechnical Engineering Practice“. Journal of Performance of Constructed Facilities 23, Nr. 3 (Juni 2009): 130–31. http://dx.doi.org/10.1061/(asce)cf.1943-5509.0000035.

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6

Juang, C. Hsein, Jie Zhang, Mengfen Shen und Jinzheng Hu. „Probabilistic methods for unified treatment of geotechnical and geological uncertainties in a geotechnical analysis“. Engineering Geology 249 (Januar 2019): 148–61. http://dx.doi.org/10.1016/j.enggeo.2018.12.010.

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7

Abdellah, Wael Rashad Elrawy. „PRACTICAL APPLICATION OF STOCHASTIC METHODS IN GEOTECHNICAL ENGINEERING“. JES. Journal of Engineering Sciences 43, Nr. 1 (01.01.2015): 57–70. http://dx.doi.org/10.21608/jesaun.2015.115147.

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8

Lees, Andrew S. „Use of geotechnical numerical methods with Eurocode 7“. Proceedings of the Institution of Civil Engineers - Engineering and Computational Mechanics 170, Nr. 4 (Dezember 2017): 146–53. http://dx.doi.org/10.1680/jencm.17.00004.

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9

Bouin, Céline, Simon Weber, Yannic A. Ethier, Jean-Sébastien Dubé und François Duhaime. „On Preferred Saturation Methods for Geotechnical Flow Tests“. Geotechnical Testing Journal 44, Nr. 4 (18.08.2020): 20190181. http://dx.doi.org/10.1520/gtj20190181.

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10

Jürgens, H., und S. Henke. „The design of geotechnical structures using numerical methods“. IOP Conference Series: Earth and Environmental Science 727, Nr. 1 (01.04.2021): 012021. http://dx.doi.org/10.1088/1755-1315/727/1/012021.

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11

Alolote, Amadi. „The Anatomy of Geotechnical Risk Factors in Transportation Infrastructure Projects“. INTERNATIONAL JOURNAL OF INNOVATION AND ECONOMIC DEVELOPMENT 4, Nr. 5 (2018): 20–30. http://dx.doi.org/10.18775/ijied.1849-7551-7020.2015.45.2002.

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Ground conditions constitute a key risk factor that can ultimately determine the successful performance of construction contracts, with the literature reporting statistics of projects which have significantly exceeded their initial budget due to geotechnical uncertainties. The study explores the nature of geotechnical risk factors in transportation infrastructure projects, which potentially lead to cost overruns. The study provides a kaleidoscopic view of the various routes to managing risks due to the ground, at the preconstruction phases of highway projects, and how a lack thereof, can culminate to determine the trend of high-cost overruns in highway projects. The study findings reveal arguments and widely contested issues in geotechnical practice, which to various degrees, can have a significant financial impact on project completion cost in highway projects. The findings uncover various error traps and gaps in practice such as the lack of deterministic costing methods that better reflect heterogeneous ground conditions; insufficiency of preliminary geotechnical exploration; poor geotechnical risk containment in contracts as well as non-deployment of multi-dimensional geotechnically bespoke contractor selection algorithm. The study submits that these gaps in practice constitute the various trajectories through which geotechnical risk can trigger inefficiency and wastage of financial resources, leading to cost overruns in transportation infrastructure projects.

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Booker, J. R., J. P. Carter, J. C. Small, P. T. Brown und H. G. Poulos. „Some recent applications of numerical methods to geotechnical analysis“. Computers & Structures 31, Nr. 1 (Januar 1989): 81–92. http://dx.doi.org/10.1016/0045-7949(89)90170-3.

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13

Rabarijoely. „A Bayesian Approach in the Evaluation of Unit Weight of Mineral and Organic Soils Based on Dilatometer Tests (DMT)“. Applied Sciences 9, Nr. 18 (09.09.2019): 3779. http://dx.doi.org/10.3390/app9183779.

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Recently, geotechnical problems that are characterized by a high degree of complexity and uncertainty with respect to input data have been solved using Bayesian analysis. One example is the problem of cautious estimation of geotechnical parameters according to Eurocode 7 requirements. The research included various types of soil such as peat, gyttja, organic mud, and clays. These were studied in order to develop an empirical correlation for determining the unit weight of mineral and organic soils. The compiled database of documented field research sites for different types of soil was used to investigate and develop direct relationships between measured results and dilatometer (DMT) readings, i.e., po and p1 together with pore water pressure (uo) and pressure (Pa). The soil unit weights were determined for both mineral and organic soils. The paper addresses the applicability of the Bayesian approach in geotechnics via a simple example related to the determination of characteristic values of geotechnical parameters for design structures. The results show that it is possible to conduct a more reliable forecast with improved statistical measures compared to other available methods for multilayer subsoils.

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An, Yan Yong, und Bao Tian Wang. „Experimental Research on Determining the Geotechnical Parameters with CPTU Methods“. Advanced Materials Research 250-253 (Mai 2011): 1798–803. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1798.

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Cone penetration test is a fast and efficient in-situ test technique. With the development of sensor technology and the use of new probes, such test is employed in more fields and reveals more soil parameters. Based on the advanced CPTU equipment, porewater pressure dissipation processes were measured at different depths, dissipation characteristics of the sandy soil and cohesive soil were analyzed respectively; Then, consolidation and permeability coefficients of the cohesive soil were calculated, the results are close to the laboratory test results. Undrained shear strength of soft clay were determined use theoretical and empirical methods, calculation accuracy of these methods were analyzed and the results show that the total cone tip resistance method is in good consistence with the measured values. CPTU is able to provide plenty of geotechnical parameters; therefore, more experience of regional tests should be drawn so as to produce more economic and technical benefit in the future.

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Oliveira da Rocha, Herson, Lúcia Maria Costa e Silva und João Andrade dos Reis Júnior. „Geotechnical investigation through SP, Electrical Resistivity and GPR geophysical methods“. Geotecnia 137 (Juli 2016): 141–55. http://dx.doi.org/10.24849/j.geot.2016.137.09.

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Peng, Cui, und Lin Yongming. „Debris-Flow Treatment: The Integration of Botanical and Geotechnical Methods“. Journal of Resources and Ecology 4, Nr. 2 (Juni 2013): 097–104. http://dx.doi.org/10.5814/j.issn.1674-764x.2013.02.001.

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Hamedifar, Hamed, Robert G. Bea, Juan M. Pestana-Nascimento und Emery M. Roe. „Role of Probabilistic Methods in Sustainable Geotechnical Slope Stability Analysis“. Procedia Earth and Planetary Science 9 (2014): 132–42. http://dx.doi.org/10.1016/j.proeps.2014.06.009.

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Lingwanda, Mwajuma Ibrahim, Anders Prästings, Stefan Larsson und Dalmas L. Nyaoro. „Comparison of geotechnical uncertainties linked to different soil characterization methods“. Geomechanics and Geoengineering 12, Nr. 2 (26.05.2016): 137–51. http://dx.doi.org/10.1080/17486025.2016.1184761.

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19

Matthews, M. C., V. S. Hope und C. R. I. Clayton. „The geotechnical value of ground stiffness determined using seismic methods“. Geological Society, London, Engineering Geology Special Publications 12, Nr. 1 (1997): 113–23. http://dx.doi.org/10.1144/gsl.eng.1997.012.01.10.

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ERENOĞLU, R. Cüneyt, und Okan YÜCESES. „Deformation Analysis by Geomatic and Geotechnical Methods in Highway Tunnels“. International Journal of Environment and Geoinformatics 6, Nr. 2 (08.08.2019): 163–71. http://dx.doi.org/10.30897/ijegeo.540837.

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Lundström, K., R. Larsson und T. Dahlin. „Mapping of quick clay formations using geotechnical and geophysical methods“. Landslides 6, Nr. 1 (04.02.2009): 1–15. http://dx.doi.org/10.1007/s10346-009-0144-9.

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22

Dezert, Théo, Yannick Fargier, Sérgio Palma Lopes und Philippe Côte. „Geophysical and geotechnical methods for fluvial levee investigation: A review“. Engineering Geology 260 (Oktober 2019): 105206. http://dx.doi.org/10.1016/j.enggeo.2019.105206.

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23

Zohra-Hadjadj, Fatima, Nadia Laredj, Mustapha Maliki, Hanifi Missoum und Karim Bendani. „Laboratory evaluation of soil geotechnical properties via electrical conductivity“. Revista Facultad de Ingeniería Universidad de Antioquia, Nr. 90 (07.02.2019): 101–12. http://dx.doi.org/10.17533/udea.redin.n90a11.

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In recent years, the use of electrical methods has been improved considerably in several areas such as environment, agronomy, geophysics and geotechnics. Electrical resistivity may be used as a parameter in soil characterization; it may have many advantages for the determination of geotechnical factors influencing the behavior of soil. In this research, laboratory tests were carried out on natural sodic soil from the region of Ain Nouissy (Mostaganem) to investigate the geotechnical and chemical behavior of a natural soil using electrical resistivity measurements under various conditions. This study aims therefore to identify relationships between electrical resistivity of the soil and some physical and chemical parameters such as water content, porosity, salt concentration and pH. Moreover, electrical resistivity has been measured with the addition of salts into the natural soil. The results show that electrical resistivity reduced drastically with the addition of salt. The obtained results will be used to evaluate properties needed for soil characterization, as well as to track soil behavior with respect to salt concentration for use in soil remediation.

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Dobecki, T. L., und P. R. Romig. „Geotechnical and groundwater geophysics“. GEOPHYSICS 50, Nr. 12 (Dezember 1985): 2621–36. http://dx.doi.org/10.1190/1.1441887.

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Because of a change in emphasis from power plant siting to projects principally involving process and facility monitoring and certification of existing structures (dams, pipelines, etc.), geotechnical and groundwater geophysics is in quite a healthy state after some lean years following the demise of nuclear energy construction projects. The orders‐of‐magnitude jump in the computational capability of geophysicists working in these fields has overshadowed advances in instrumentation (e.g., digital enhancement seismographs), field methods (e.g., cross‐borehole EM), and interpretive procedures. The advent of powerful, affordable microcomputers has enabled expansion into applications demanding finer resolution and quicker turnaround of results. As a result, shallow seismic reflection, seismic and electromagnetic geotomography, and the complementary use of surface and borehole electrical resistivity and seismic data will soon be common if not dominant methods in geotechnical and groundwater investigations. Future trends point to increased emphasis on environmental and economic issues (e.g., toxic wastes or the stability of underground petroleum storage facilities), cross‐fertilization with petroleum reservoir engineering (process monitoring and detailed reservoir description), and greater involvement of computers in the planning, data acquisition, and interpretive phases of our projects. As computers take over more of the data collection‐processing‐interpretation sequence, one of the greatest challenges facing us will be to define the proper role of humans and to use the new technology wisely.

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Rezaei, Sadegh, Issa Shooshpasha und Hamed Rezaei. „Empirical Correlation between Geotechnical and Geophysical Parameters in a Landslide Zone (Case Study: Nargeschal Landslide)“. Earth Sciences Research Journal 22, Nr. 3 (01.07.2018): 195–204. http://dx.doi.org/10.15446/esrj.v22n3.69491.

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Today, geotechnical and geophysical techniques are used for landslide evaluation. Geotechnical methods provide accurate data, but are time consuming and costly. Geophysical techniques, however, are fast and inexpensive, yet their accuracy is lower than that of the geotechnical methods. Therefore, simultaneous use of geotechnical and geophysical methods provides a suitable solution for landslide evaluation. Availability of geotechnical and geophysical data makes it possible to investigate correlation between different parameters. Correlating geotechnical and geophysical parameters ends up lowering field investigation costs and enhancing subsurface survey speed in a landslide zone. In the present study, in order to evaluate Nargeschal landslide in Iran, ambient noise measurement, ERT survey, and geotechnical investigations were used. Once finished with data processing, the data obtained from geotechnical and geophysical investigations were correlated. These included SPT-N – electrical resistivity, soil moisture content – electrical resistivity, and SPT-N – shear wave velocity correlations. The correlations were examined using two methods, namely Spearman’s coefficient test and least square regression analysis. The results obtained from the two methods were in good agreement with one another. The correlations obtained in this study were of moderate to very strong strength and fell in the range of the results of previous studies. Investigation of the results indicated significant influences of ground water on electrical resistivity and soil stiffness on shear wave velocity. Results of this study can be used for soil classification and determination of mechanical and seismic characteristics of soil across various areas.

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Dodigović, Filip, Krešo Ivandić, Meho Saša Kovačević und Božo Soldo. „Error Evaluation and Suitability Assessment of Common Reliability Methods in the Case of Shallow Foundations“. Applied Sciences 11, Nr. 2 (15.01.2021): 795. http://dx.doi.org/10.3390/app11020795.

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A geotechnical structure’s reliability index calculated using identical input parameters and assumptions can significantly vary as a function of the used method. The different approaches to solving the reliability problem could result in an error which depends on many factors. The most important error sources are the complexity of the performance function, the number of random variables, their mutual correlations, and marginal statistical distributions. A review of relevant literature in the field of reliability in geotechnical engineering revealed a lack of information on the errors of individual reliability methods for geotechnical problems and general criteria for assessing their suitability concerning the error size. The paper defines the reliability method error and proposes criteria for assessing the suitability of reliability methods in geotechnical engineering. Based on the proposed criteria, the suitability of common reliability methods was evaluated in the example of a shallow foundation, analysed according to Eurocode 7, DA 3, such that Ed=Rd. It is shown that due to the mathematically complex expression of the reliability integral, methods that are easier to use result in a larger error and are not suitable for a reliability analysis of shallow foundations. Sophisticated methods are more accurate but require specific knowledge and resources that are not often used in daily engineering practice.

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Basri, Kasbi, Adnan Zainorabidin, Mohd Khaidir Abu Talib und Norhaliza Wahab. „Estimating the Small Strain Stiffness of Peat Soil Using Geophysical Methods“. International Journal of Engineering Technology and Sciences 7, Nr. 1 (10.02.2021): 44–54. http://dx.doi.org/10.15282/http://dx.doi.org/10.15282/ijets.7.1.2020.1005.

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Geotechnical design commonly requires that the in-situ stiffness, strength and permeability of the ground be obtained. Laboratory based investigation often related with risk of sample disturbance and difficulties to replicate the in-situ stress condition which results in overestimation or underestimation. Application of geophysical methods in geotechnical investigation previously was limited to targeting and dimensioning sub-surface features due to lack of resolution. However, rapid developments of geophysical methods result in the application of these methods in providing geotechnical design parameters. Multichannel analysis of surface waves (MASW) and seismic refraction were among the geophysical methods capable of obtaining stiffness parameters including the maximum shear modulus (Gmax) and maximum elastic modulus (Emax). The study revealed the efficiency of these methods to measure the small strain stiffness of peat soil with high accuracy as the results obtained were found to be similar to those obtained by previous researchers. Overall, the Gmax and Emax values of peat soil obtained range from 0.49 to 1.72 MPa and 1.46 to 5.15 MPa respectively. The Gmax and Emax values obtained shows significant increase with depth governed primarily by the effective stress. Other parameters such as degree of decomposition and peat thickness also shows potential influence on the Gmax and Emax values obtained.

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Hamze, Y., und A. Altaa. „Photogrammetry and Tomography Technique methods, its comparison with the conventional methods of geotechnical laboratory testing“. Physics Procedia 21 (2011): 128–33. http://dx.doi.org/10.1016/j.phpro.2011.10.019.

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Ghanem, Fatima. „Geotechnical Engineering Evaluation of Superficial Deposits Utilizing Seismic Methods at Al al-Bayt University, Jordan“. Iraqi Geological Journal 54, Nr. 1D (30.04.2021): 11–28. http://dx.doi.org/10.46717/igj.54.1d.2ms-2021-04-22.

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Integration of seismic refraction tomography and multi-channel analyses shear wave methods were used at Al al-Bayt university campus in Mafraq, NE Jordan to delineate the shallow subsurface layering and determine their geotechnical properties, in addition, to estimate the geotechnical engineering parameters of the superficial deposits for detailed purposes. The P-wave refraction velocities were found to range from 180 to 2300 m/s for the three identified layers which indicating superficial soil deposits with an increasing degree of compaction with depth. The S-wave velocities were found to lie in a narrow velocity range (250 to 600 m/s), which badly resolved the subsurface layering. Moreover, four soil samples were taken from the sites of seismic survey points for density calculations. The average calculated density was found to be 1.85 g/cm3. Two soil samples from nearby seismic profile-1 and seismic profile-4 were tested for geotechnical properties. The results showed that the seismic method is an effective tool to estimate the different elastic moduli; Poisson's ratio, Young's modulus, Bulk modulus, Shear modulus, Lame's constants, and geotechnical engineering parameters; N-value, bearing capacity, material index, concentration index, and stress ratio of the superficial soil deposits. The study recommends conducting a detailed geophysical study before starting any type of geoengineering construction in the area.

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Cheng, Y. M., L. Li und S. S. Fang. „Improved Harmony Search Methods to Replace Variational Principle in Geotechnical Problems“. Journal of Mechanics 27, Nr. 1 (März 2011): 107–19. http://dx.doi.org/10.1017/jmech.2011.12.

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ABSTRACTVariational principle is an important principle in engineering discipline. This principle is suitable for simple problems where an analytical expression can be determined, but there are many practical problems where the classical variational principle is practically impossible to be applied. In this paper, the authors will try to demonstrate that the variational principle can be replaced by the use of modern artificial intelligence based optimization method (harmony search method) which can be applied to much more complicated problems. Two different improved harmony search algorithms are proposed in this paper. The new algorithms differ from the original algorithm in that: (1) The harmonies are rearranged into several pairs and the better pairs are used to develop several new harmonies; (2) Different probabilities are assigned to different harmonies. The robustness of the proposed methods is demonstrated by using three difficult examples, and the sensitivities of the related optimization parameters are investigated through statistical orthogonal analysis.

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Noakes, Adam J. P., Laura F. Mason-Jarvis, Graham R. Taylor und Eifion Evans. „Geospatial assessment methods for geotechnical asset management of legacy railway embankments“. Quarterly Journal of Engineering Geology and Hydrogeology 53, Nr. 2 (23.10.2019): 339–48. http://dx.doi.org/10.1144/qjegh2018-092.

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Scott, B., P. G. Ranjtih, S. K. Choi und Manoj Khandelwal. „Geological and geotechnical aspects of underground coal mining methods within Australia“. Environmental Earth Sciences 60, Nr. 5 (05.08.2009): 1007–19. http://dx.doi.org/10.1007/s12665-009-0239-6.

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Oberguggenberger, Michael, und Wolfgang Fellin. „Reliability bounds through random sets: Non-parametric methods and geotechnical applications“. Computers & Structures 86, Nr. 10 (Mai 2008): 1093–101. http://dx.doi.org/10.1016/j.compstruc.2007.05.040.

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Chang, Lee und Cho. „Global CO2 Emission-Related Geotechnical Engineering Hazards and the Mission for Sustainable Geotechnical Engineering“. Energies 12, Nr. 13 (03.07.2019): 2567. http://dx.doi.org/10.3390/en12132567.

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Global warming and climate change caused by greenhouse gas (GHG) emissions have rapidly increased the occurrence of abnormal climate events, and both the scale and frequency of geotechnical engineering hazards (GEHs) accordingly. In response, geotechnical engineers have a responsibility to provide countermeasures to mitigate GEHs through various ground improvement techniques. Thus, this study provides a comprehensive review of the possible correlation between GHG emissions and GEHs using statistical data, a review of ground improvement methods that have been studied to reduce the carbon footprint of geotechnical engineering, and a discussion of the direction in which geotechnical engineering should proceed in the future.

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Clark, J. I., und J. Y. Guigné. „Twenty-fifth anniversary special paper: Marine geotechnical engineering in Canada“. Canadian Geotechnical Journal 25, Nr. 2 (01.05.1988): 179–98. http://dx.doi.org/10.1139/t88-023.

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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.

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Vafidis, A., M. Steiakakis, Z. Agioutantis, N. Andronikidis, G. Kritikakis, N. Economou, K. Pandi et al. „"Geo-characterization" of selected areas in Crete, Greece, towards realistic assessment of seismic design actions“. Bulletin of the Geological Society of Greece 47, Nr. 3 (05.09.2013): 1439. http://dx.doi.org/10.12681/bgsg.11029.

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The geo-characterization of site conditions is crucial for the estimation of regional elastic spectra. The work to be done in the framework of the “GEO-CHARACTERIZATION” THALIS-project, will combine geotechnical and geophysical methods and evaluate them to estimate critical geotechnical parameters. Although geotechnical tests in lab may provide more accurate estimates of geotechnical parameters, they require costly and time consuming drilling procedures. On the other hand geophysical methods are useful in providing estimates in situ of subsurface physical properties, which are not directly related to geotechnical parameters. Within “GEO-CHARACTERIZATION” THALIS-project a pilot survey for geotechnical characterization at selected sites of Hellenic Accelerometric Network in Crete will be conducted by employing geotechnical, geological and geophysical techniques. Subsequently, by correlating “geo-data” collected within this project, relations of certain mechanical parameters obtained in laboratory or/and in situ with geophysical parameters for typical geologic formations and soils will be established. The “GEO-CHARACTERIZATION” project, will focus on the influence of dynamic loads on geotechnical phenomena related to the static stress field variation, the estimation of site effects due to seismic motion and the proposal of regional elastic spectra for seismic provisions as well as their comparison with the corresponding elastic design spectra of Eurocode 8 (EC8).

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Wang, Yu Lan, und Chao Li. „Research on Geotechnical Regionalization for Highway“. Advanced Materials Research 838-841 (November 2013): 1197–202. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.1197.

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Two level zone index system of the provincial highway geotechnical zone was established on the basis of analysis of the relationship between geotechnical elements and highway engineering. The highway rock-soil type conversion rules and the zone standard of two level zone indexes were set through comparative analysis of the characteristics of rock-soil on the engineering geological map. According to the general principles and methods of zone study, the research framework of provincial highway geotechnical zone was constructed. Under the guidance of this framework, Shandong province highway geotechnical zone was completed and the whole research area was divided into 2 grade I and 5 grade II. The results indicate that the new highway geotechnical zone can better reflect the variation of rock-soil engineering properties in Shandong province. The result verifies the scientificalness and effectiveness of the research framework of provincial highway geotechnical zone and provides basic data for research on highway geotechnical zone of nationwide.

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Batog, Andrzej, und Maciej Hawrysz. „Reliability of the geotechnical data for the modernization and repair of railways“. Transportation Overview - Przeglad Komunikacyjny 2016, Nr. 10 (01.10.2016): 39–46. http://dx.doi.org/10.35117/a_eng_16_10_04.

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The article concerns the rules and guidelines used for geotechnical design, subsoil investigation procedures and geotechnical investigation methods of railway lines. The discussion of the soil investigation methods, which provide reliable geotechnical data for the modernization and repair of railway lines, is presented. The article describes a comprehensive example of errors made during the programming and performing of soil investigations in the modernized railway line. The impact of soil investigation errors on the slope stability of the railway embankment is discussed.

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Ruwanpura, J. Y., S. M. AbouRizk und M. Allouche. „Analytical methods to reduce uncertainty in tunnel construction projects“. Canadian Journal of Civil Engineering 31, Nr. 2 (01.02.2004): 345–60. http://dx.doi.org/10.1139/l03-105.

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This paper presents a method to quantify uncertainty using simulation techniques and approximate geotechnical methods. Unknown soil conditions are major contributors to uncertainty in any underground construction project. Soil conditions are unknown because generally soil samples taken from vertical boreholes show only the soils present in the discrete borehole locations. The soil profiles between the boreholes therefore contribute to project uncertainty, and construction practitioners must make assumptions about these soil profiles for construction planning and scheduling purposes. Analytical and simulation methods are presented to accurately predict soil profiles between boreholes and reduce uncertainty in a "rough and ready" fashion. These methods use existing borehole data to create an analytical model for soil prediction, which is then incorporated with a process interaction simulation model of the construction project using special purpose simulation concepts and advanced geotechnical characterization techniques. The application of these methods to an Edmonton tunnel construction project is also detailed. Construction engineers or managers can use these simulation methods to strengthen the geological data obtained for the construction project.Key words: borehole data, construction, risk, soil families, soil profiles, soil transitions, special purpose simulation, tunnelling, uncertainty.

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Bali, Haluk, und Salih Alcay. „The Methods Used in Monitoring of Large Dams in Turkey“. Academic Perspective Procedia 3, Nr. 1 (25.10.2020): 236–45. http://dx.doi.org/10.33793/acperpro.03.01.51.

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Turkey is a very rich country in terms of water resources. However, in order to use these resources efficiently, water must be stored safely. In this context, the best form of storage is the construction of dams. In our country, large dams, which are among the world's important dams, are being built. Although there are many advantages of large dams, the loss of life and property will be so great in case of a possible deformation or destruction. The fact that dams are under the influence of various forces, as well as being located in the earthquake zone of our country, necessitates continuous monitoring of our dams. Dams are generally monitored using geodetic methods and geotechnical devices. However, mostly details of these two methods are evaluated separately in dam monitoring. Evaluating the results of both methods together is very important for the comprehensive monitoring of the dam and the correct interpretation of possible deformations. In this study, large dams in our country and monitoring studies carried out by using geodetic and geotechnical methods in these dams are given in detail.

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ΠΑΠΑΔΟΠΟΥΛΟΣ, Τ. Δ., I. A. ΑΛΕΞΟΠΟΥΛΟΣ und Π. Ι. ΚΑΜΠΟΥΡΗΣ. „A comparative study for structural bedrock delineation by using conventional geophysical methods“. Bulletin of the Geological Society of Greece 34, Nr. 4 (01.01.2001): 1301. http://dx.doi.org/10.12681/bgsg.17217.

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In this paper is examined the potential and effectiveness of two conventional geophysical methods in geotechnical research. The seismic refraction method that has been successfully used in the past for subsurface bedrock delineation in foundation projects, failed to indicate clear distinction between flysch and limestone bedrock material in the area under investigation. This failure is due to the macro-anisotropy structure of the limestone that resulted from joints, tectonic processes or/and karstic phenomena and later fillings of the voids with argillaceous material. The geoelectrical method of vertical sounding, on the other hand, although provided a clear distinction for the bedrock characterization, failed to distinguish the overburden cover from the underlain flysch formation. Finally, in this paper it is shown that for a successful application of geophysical work in geotechnical research, it is required effective design, utilization of modern analysis methods and handling more than geophysical methods.

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Chen, Hao, De Ren Kong, Xiao Tong, Fan Yang und Li Ping Li. „Research on Measuring Methods on Explosion Seismic Waves“. Applied Mechanics and Materials 670-671 (Oktober 2014): 1188–93. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.1188.

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In engineering practice, geotechnical particle vibration speed is usually regarded as stability criterion of explosion seismic wave. However, when using explosion seismic wave to evaluate damage effect of shock wave, it is needed to study characteristics on other physical quantities of explosion seismic wave. By establishing test system of explosion seismic wave, seismic acceleration signals of 4 rounds of ammunition in air explosions are measured in three directions. The results show that the test system is reliable and effective.

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Vieira de Lemos, José, Cesar Sagaseta und Márcio Muniz de Farias. „Thematic Issue on Application of Numerical Methods in Geotechnical Engineering Works, Foreword“. Geotecnia 144 (November 2018): 67–70. http://dx.doi.org/10.24849/j.geot.2018.144.06.

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Manzyrev, D. V., und M. P. Kamelin. „Informativity of the geotechnical methods that monitor non-confluent type permafrost soils“. Equipment and Technologies for Oil and Gas Complex, Nr. 3 (2019): 39–44. http://dx.doi.org/10.33285/1999-6934-2019-3(111)-39-44.

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Bruckno, Brian S., Chester F. Watts, George Stephenson und Christopher Mau. „Natural Bridge, Virginia: Complementary Geotechnical Investigation and Analysis Methods for Mobility Planning“. Environmental and Engineering Geoscience 26, Nr. 2 (27.05.2020): 141–48. http://dx.doi.org/10.2113/eeg-2305.

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ABSTRACT Natural Bridge, in Rockbridge County, Virginia, is a geological arch carrying U.S. Route 11 over Cedar Creek. The area has significant historical and cultural importance; it is listed on the National Register of Historic Places and is a Virginia Historic Landmark. Until 2015, the arch and area below were privately owned and operated, with only the pavement structure of U.S. Route 11 held by the Virginia Department of Transportation. Since then, the arch and area below have been leased to the Virginia Department of Conservation and Recreation, potentially transferring liability to the Commonwealth. As part of the Commonwealth's due diligence and to help ensure that the arch is preserved for future generations, the Department of Transportation, in partnership with Radford University, completed a comprehensive, non-invasive geological and geotechnical investigation in 2017 and 2018. A complementary variety of geophysical, laser, optical, seismic, and traditional geological methods of study were used to allow for integrated data analysis. The investigation revealed potential risks to the integrity of the arch, which may eventually reduce its suitability for use as a transportation corridor. The investigation methodology allowed planning for protection of the environment, cultural resources, and local economies while avoiding any potential damage to the arch. As of the date of this article, plans are under way to relocate U.S. Route 11 onto an alternate alignment entirely, thereby helping to preserve this valuable cultural, historical, and geological asset.

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Alabi, A. A., A. O. Adewale, J. O. Coker und O. A. Ogunkoya. „Site Characterization for Construction Purposes at FUNAAB using Geophysical and Geotechnical Methods“. Materials and Geoenvironment 65, Nr. 2 (01.09.2018): 89–102. http://dx.doi.org/10.2478/rmzmag-2018-0007.

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AbstractGeophysical and geotechnical techniques were used to investigate the sub-surface information of a proposed site for a hostel construction at Federal University of Agriculture, Abeokuta. Ten vertical electrical sounding (VES) stations were adopted. Typical sounding curves obtained include the HA, KH, AKH and KQH types, of which the AKH-type consists of 40% of the survey points, and a maximum of five geo-electric sub-surface layers were delineated. Laboratory analyses were performed to investigate particle size distribution, Atterberg limit, compaction limit, California bearing ratio (CBR) and specific gravity. The CBR revealed that all soil samples, except L4, are mechanically stable and have high load-bearing capacity. The Atterberg limit test and the geo-electric section showed that the second layer of VES 4 is composed of sandy clay with high plastic index and low liquid limit, which may pose a threat to the foundation of any engineering structure. VES locations 5, 6 and 8 were identified as high groundwater potential zones suitable for optimum groundwater abstraction. The study area is suitable for both shallow and deep foundations, however VES 4 and VES 5 require reinforcement.

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Bao, Xiaohua, Zhiyang Jin, Hongzhi Cui, Xiangsheng Chen und Xiongyao Xie. „Soil liquefaction mitigation in geotechnical engineering: An overview of recently developed methods“. Soil Dynamics and Earthquake Engineering 120 (Mai 2019): 273–91. http://dx.doi.org/10.1016/j.soildyn.2019.01.020.

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Brom, Aleksander, und Adrianna Natonik. „Estimation of geotechnical parameters on the basis of geophysical methods and geostatistics“. Contemporary Trends in Geoscience 6, Nr. 2 (01.12.2017): 70–79. http://dx.doi.org/10.1515/ctg-2017-0006.

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AbstractThe paper presents possible implementation of ordinary cokriging and geophysical investigation on humidity data acquired in geotechnical studies. The Author describes concept of geostatistics, terminology of geostatistical modelling, spatial correlation functions, principles of solving cokriging systems, advantages of (co-)kriging in comparison with other interpolation methods, obstacles in this type of attempt. Cross validation and discussion of results was performed with an indication of prospect of applying similar procedures in various researches..

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Chen, Xi, Yongkang Wu, Yuzhen Yu und Kok-Kwang Phoon. „Performance of Neumann Expansion Preconditioners for Iterative Methods with Geotechnical Elastoplastic Applications“. International Journal of Geomechanics 16, Nr. 3 (Juni 2016): 04015069. http://dx.doi.org/10.1061/(asce)gm.1943-5622.0000561.

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Gunn, D. A., S. G. Pearson, J. E. Chambers, L. M. Nelder, J. R. Lee, D. Beamish, J. P. Busby, R. D. Tinsley und W. H. Tinsley. „An evaluation of combined geophysical and geotechnical methods to characterize beach thickness“. Quarterly Journal of Engineering Geology and Hydrogeology 39, Nr. 4 (November 2006): 339–55. http://dx.doi.org/10.1144/1470-9236/05-038.

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