Artigos de revistas: "Soil mechanics"

1

Koyluoglu, U. "Soil mechanics for unsaturated soils." Soil Dynamics and Earthquake Engineering 12, no. 7 (1993): 449–50. http://dx.doi.org/10.1016/0267-7261(93)90011-f.

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Popescu, M. E. "Soil mechanics." Engineering Geology 22, no. 4 (July 1986): 381–82. http://dx.doi.org/10.1016/0013-7952(86)90009-8.

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3

Haeri, S. Mohsen. "Hydro-mechanical behavior of collapsible soils in unsaturated soil mechanics context." Japanese Geotechnical Society Special Publication 2, no. 1 (2016): 25–40. http://dx.doi.org/10.3208/jgssp.kl-3.

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4

Ackerman, A. F. "Unsaturated Soil Mechanics." Environmental and Engineering Geoscience 13, no. 1 (February 1, 2007): 87–89. http://dx.doi.org/10.2113/gseegeosci.13.1.87.

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5

Berli, Markus, and Dani Or. "Unsaturated Soil Mechanics." Vadose Zone Journal 4, no. 2 (May 2005): 451. http://dx.doi.org/10.2136/vzj2005.0002br.

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6

Sterrett, Robert J. "Advanced Soil Mechanics." Eos, Transactions American Geophysical Union 66, no. 42 (1985): 714. http://dx.doi.org/10.1029/eo066i042p00714-02.

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7

Baker, Rafael, and Sam Frydman. "Unsaturated soil mechanics." Engineering Geology 106, no. 1-2 (May 2009): 26–39. http://dx.doi.org/10.1016/j.enggeo.2009.02.010.

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8

DJN. "Basic soil mechanics." Computers and Geotechnics 1, no. 1 (January 1985): 71. http://dx.doi.org/10.1016/0266-352x(85)90016-3.

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9

Jonhson, Professor C. E. "Agricultural soil mechanics." Soil and Tillage Research 6, no. 4 (March 1986): 378–79. http://dx.doi.org/10.1016/0167-1987(86)90036-x.

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10

Клубничкин, Evgeniy Klubnichkin, Клубничкин, Vladislav Klubnichkin, Дручинин, Denis Druchinin, Бухтояров, et al. "Model of the interaction of elements of track supporting surface of harvester with soil." Forestry Engineering Journal 4, no. 4 (January 15, 2015): 191–200. http://dx.doi.org/10.12737/8472.

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Analytical description of the interaction between the tracks with soil is quite difficult, although to date the physical and mechanical properties of soils are fairly well understood. However, the application of the laws of soil mechanics to describe the interaction of track with soil is not acceptable because of loading dynamism of soil with elements of track bearing surfaces. Therefore, to describe the process of interaction of track with soil the experimental data are used, which revealed some general patterns.

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11

Qin, Hong Fei, and Yan Ke Liu. "An Inductive Method for Soil Mechanics." Applied Mechanics and Materials 423-426 (September 2013): 1317–20. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.1317.

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Soil Mechanics, as one of the most important basic courses in civil engineering, hydraulic engineering and other courses, mainly analyzes the questions of deformation and stability of the soli body. The undergraduates begin to learn soil mechanics after finishing advanced mathematics, college physics, theoretical mechanics and mechanics of materials. The objects researched in the above-mentioned courses are idealised, so the rigorous mathematic deduction is feasible and only a few hypotheses are needed. Soil is different from other materials, so inevitably the methodology and thinking mode in soil mechanics are special compared with other mechanical courses, which makes students feel confused at the beginning stage of this course. It is necessary to let students know the teaching idea, research method, common problems during the instruction of soil mechanics, which is also helpful to their further studies and researches. Based on these factors, an inductive teaching method is put forward, which summarizes the essential ideas and important questions in soil mechanics.

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12

Fredlund, Delwyn G. "The 1999 R.M. Hardy Lecture: The implementation of unsaturated soil mechanics into geotechnical engineering." Canadian Geotechnical Journal 37, no. 5 (October 1, 2000): 963–86. http://dx.doi.org/10.1139/t00-026.

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The implementation of unsaturated soil mechanics into geotechnical engineering practice requires that there be a paradigm shift from classical soil mechanics methodology. The primary drawback to implementation has been the excessive costs required to experimentally measure unsaturated soil properties. The use of the soil-water characteristic curve has been shown to be the key to the implementation of unsaturated soil mechanics. Numerous techniques have been proposed and studied for the assessment of the soil-water characteristic curves. These techniques range from direct laboratory measurement to indirect estimation from grain-size curves and knowledge-based database systems. The soil-water characteristic curve can then be used for the estimation of unsaturated soil property functions. Theoretically based techniques have been proposed for the estimation of soil property functions such as (i) coefficient of permeability, (ii) water storage modulus, and (iii) shear strength. Gradually these estimations are producing acceptable procedures for geotechnical engineering practices for unsaturated soils. The moisture flux ground surface boundary condition is likewise becoming a part of the solution of most problems involving unsaturated soils. The implementation process for unsaturated soils will still require years of collaboration between researchers and practicing geotechnical engineers.Key words: unsaturated soil mechanics, soil suction, unsaturated soil property functions, negative pore-water pressure, matric suction, soil-water characteristic curve.

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13

Wei, Xin, Chongyang Gao, and Ke Liu. "A Review of Cracking Behavior and Mechanism in Clayey Soils Related to Desiccation." Advances in Civil Engineering 2020 (August 14, 2020): 1–12. http://dx.doi.org/10.1155/2020/8880873.

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Cracks in clayey soils are common during desiccation. The presence of cracks significantly alters the mechanical and hydraulic properties of soils. The objective of this article is to summarize the works on cracking behavior and mechanism in clayey soils related to desiccation. Historical field investigations, laboratory experimentations, identified mechanisms, and numerical approaches for modeling the process of cracking during desiccation are discussed. The experimental approaches for interpreting the mechanisms of cracking are systematically summarized and comprehensively reviewed based on the in situ observations and laboratory experimentations from the literature. The soil mechanics-based approaches resumed in this article according to the fracture mechanics theory and numerical results highlight the cracking development mechanism. Concerning the plasticity characteristics of clayey soils, researches on soil fracture mechanics should be paid more attention. More in situ experimentations and numerical researches are suggested for future researches to better understand the cracking behavior and mechanism in clayey soils related to desiccation.

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14

Likos, William J. "Experimental Unsaturated Soil Mechanics." Vadose Zone Journal 9, no. 1 (2010): 196. http://dx.doi.org/10.2136/vzj2009.0115br.

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15

Einav, Itai. "Soil mechanics: breaking ground." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 365, no. 1861 (September 13, 2007): 2985–3002. http://dx.doi.org/10.1098/rsta.2007.0009.

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In soil mechanics, student's models are classified as simple models that teach us unexplained elements of behaviour; an example is the Cam clay constitutive models of critical state soil mechanics (CSSM). ‘Engineer's models’ are models that elaborate the theory to fit more behavioural trends; this is usually done by adding fitting parameters to the student's models. Can currently unexplained behavioural trends of soil be explained without adding fitting parameters to CSSM models, by developing alternative student's models based on modern theories? Here I apply an alternative theory to CSSM, called ‘breakage mechanics’, and develop a simple student's model for sand. Its unique and distinctive feature is the use of an energy balance equation that connects grain size reduction to consumption of energy, which enables us to predict how grain size distribution (gsd) evolves—an unprecedented capability in constitutive modelling. With only four parameters, the model is physically clarifying what CSSM cannot for sand: the dependency of yielding and critical state on the initial gsd and void ratio.

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Debreczeny, P. A. "Rock and soil mechanics." Geotextiles and Geomembranes 9, no. 2 (January 1990): 199–200. http://dx.doi.org/10.1016/0266-1144(90)90014-4.

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Li, A. L. "Mechanics of reinforced soil." Canadian Geotechnical Journal 38, no. 6 (December 1, 2001): 1366. http://dx.doi.org/10.1139/t01-050.

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Maranha das Neves, Emanuel. "Teaching modern soil mechanics." Soils and Rocks 47, no. 2 (February 14, 2024): e2024006823. http://dx.doi.org/10.28927/sr.2024.006823.

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The important role of the critical state theory in the modern soil mechanics is undeniable. It is true that the number of soil mechanics courses that not cover this subject is progressively decreasing. However, when the critical state theory is introduced, this topic cannot be seen as a simple extension of the classic soil mechanics. On the contrary, it is essential that some significant differences between modern and classic soil mechanics are adequately clarified and understood. This subject is a relevant objective of this paper, besides the large benefits brought by the modern soil mechanics. This discipline, like the mechanics applied to other materials, is fundamentally a preliminary learning to prepare for the professional practice of geotechnical engineering. When the main objective is to teach methods to solve the engineering problems (foundations, excavations, embankments, tunnels, etc.), the matters transmitted to the students are sometimes focused on the geotechnical engineering methods, where, nevertheless, soil mechanics, naturally, has an irreplaceable role. It is true that a design is unique in itself. However, all designs must have in common the same theoretical principles of soil mechanics, regardless of the particularities of the geotechnical design. This cannot be neglected in the modern soil mechanics teaching. Brief ideas concerning where and how soil mechanics has been taught, is also introduced. The fundamentals about plastic design of geotechnical structures are highlighted. The article ends calling attention to the outstanding contribution of the critical state theory for a unified understanding of the soil behavior. Its pedagogic benefits are invaluable.

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19

Baudet, Béatrice A. "Critical State Soil Mechanics: A Pore-Based Perspective." IOP Conference Series: Earth and Environmental Science 1480, no. 1 (April 1, 2025): 012093. https://doi.org/10.1088/1755-1315/1480/1/012093.

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Abstract The characterization and modelling of geomaterials at the microscale have typically been focused on soil particles although voids constitute a significant part of soils and play an important role in soil behaviour. Departing from the recent studies on particle arrangement and discrete element modelling of clays, this lecture highlights how clay behaviour can be effectively described at the microscale in terms of pores, and how this can be linked to the mechanical behaviour observed at the mesoscale. To that purpose, a series of compression and shearing tests was carried out on reconstituted clay, and samples of the tested soil analysed by mercury intrusion porosimetry, gas adsorption and scanning electron microscopy in order the map the micro-porosity with recognised states in the critical state soil mechanics (CSSM) framework. Initial results suggest that it is possible to explain some features of CSSM observed at the mesoscale with mechanisms observed at the microscale.

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20

Wardani, Sri Prabandiyani Retno, Muhrozi Muhrozi, Andi Retno Ari Setiaji, and Danny R. Riwu. "Stabilisasi Tanah Ekspansive dengan Menggunakan Tanah Putih untuk Tanah Dasar di Daerah Godong Kabupaten Grobogan Jawa Tengah." MEDIA KOMUNIKASI TEKNIK SIPIL 24, no. 1 (August 24, 2018): 1. http://dx.doi.org/10.14710/mkts.v24i1.16275.

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Problematic soils such as expansive soils are common in Indonesia. There are several methods to overcome the damage caused by expansive soil, such as by mixing the soil with additives. Some researchers have conducted research by mixing additives into expansive soil (cement, lime, fly ash etc), which work to increase soil strength and reduce swelling. Considering that the people in Buraen Village of Kabupaten Kupang use white soil as a substitute for cement, where the white soil has chemical constituents almost the same as those owned by cement, and contain CaO as it has lime, it is necessary to do research to determine the effect of white soil on physical and mechanical properties of expansive soil, so it can be used as an additive. This research was conducted at Soil Mechanics Laboratory, Civil Engineering Department, Engineering Faculty, Diponegoro University, Semarang.with soil sample from Godong, Central Java and white soil in Buraen Village of Kupang Regency, which purpose to find out the change of physical and mechanical properties of expansive soil that have been given some variation of mixture of white soil to the dry weight of the soil, with optimum moisture content from standard Proctor test results. The results of this study indicate that white soil can be used as an additive and the use of OMC for mixing is the OMC of expansive soil.

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21

Beckett, Christopher, Andy Fourie, and David Toll. "Water repellent soils: the case for unsaturated soil mechanics." E3S Web of Conferences 9 (2016): 11011. http://dx.doi.org/10.1051/e3sconf/20160911011.

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22

Hettiaratchi, D. R. P. "A critical state soil mechanics model for agricultural soils." Soil Use and Management 3, no. 3 (September 1987): 94–105. http://dx.doi.org/10.1111/j.1475-2743.1987.tb00718.x.

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23

JOHNSTON, I. W., and E. A. NOVELLO. "SOIL MECHANICS, ROCK MECHANICS AND SOFT ROCK TECHNOLOGY." Proceedings of the Institution of Civil Engineers - Geotechnical Engineering 107, no. 1 (January 1994): 3–9. http://dx.doi.org/10.1680/igeng.1994.25715.

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24

Galindo-Torres, Sergio Andres, Alexander Scheuermann, David Williams, and Hans Mühlhaus. "Micro-Mechanics of Contact Erosion." Applied Mechanics and Materials 553 (May 2014): 513–18. http://dx.doi.org/10.4028/www.scientific.net/amm.553.513.

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In the present paper a simulation framework is presented coupling the mechanics of fluids and solids to study the contact erosion phenomenon. The fluid is represented by the Lattice Boltzmann Method (LBM) and the soil particles are modeled using the Discrete Element Method (DEM). The coupling law considers accurately the momentum transfer between both phases. A soil composed of particles of two distinct sizes is simulated by the DEM and then hydraulically loaded with an LBM fluid. It is observed how the hydraulic gradient compromises the stability of the soil by pushing the smaller particles into the voids between the largest ones. The hydraulic gradient is more pronounced in the areas occupied by the smallest particles due to a reduced constriction size, which at the same time increases the buoyancy acting on them. At the mixing zone, where both particles sizes coexist, the fluid transfers its momentum to the small particles, increasing the erosion rate in the process. The results offer new insights into the erosion and suffusion processes, which could be used to better predict and design structures on hydraulically loaded soils.

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25

Morris, Peter H., J. Graham, and David J. Williams. "Cracking in drying soils." Canadian Geotechnical Journal 29, no. 2 (April 1, 1992): 263–77. http://dx.doi.org/10.1139/t92-030.

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Cracking in soils that are undergoing drying is controlled by soil suctions and by soil properties such as compression modulus, Poisson's ratio, shear strength, tensile strength, and specific surface energy. The paper reviews the occurrence and morphology of cracks in dry-climate regions of Australia and Canada. After reviewing the behaviour of unsaturated soils and the mechanics of cracking, solutions are developed based on (i) elasticity theory, (ii) the transition between tensile and shear failure, and (iii) linear elastic fracture mechanics. The solutions are compared and related to crack depths observed in the field. Key words : clay, cracks, crust, shear strength, soil suction, tensile strength, unsaturated soil, weathering.

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26

Brown, S. F. "Soil mechanics in pavement engineering." Géotechnique 46, no. 3 (September 1996): 383–426. http://dx.doi.org/10.1680/geot.1996.46.3.383.

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McDowell, G. R., and M. D. Bolton. "Micro Mechanics of Elastic Soil." Soils and Foundations 41, no. 6 (December 2001): 147–52. http://dx.doi.org/10.3208/sandf.41.6_147.

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28

Jefferson, Ian, and Ian Smalley. "Soil mechanics in engineering practice." Engineering Geology 48, no. 1-2 (November 1997): 149–50. http://dx.doi.org/10.1016/s0013-7952(97)81919-9.

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M.J.K. "Rheological fundamentals of soil mechanics." Computers and Geotechnics 2, no. 6 (1986): 389–90. http://dx.doi.org/10.1016/0266-352x(86)90032-7.

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Nieuwenhuis, J. D. "Rheological Fundamentals of Soil Mechanics." Engineering Geology 26, no. 1 (August 1988): 102. http://dx.doi.org/10.1016/0013-7952(88)90009-9.

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31

Das, Braja M. "Handbook of soil mechanics, Vol. 3. Soil mechanics of earthworks, foundations and highway engineering." Engineering Geology 29, no. 2 (July 1990): 191–92. http://dx.doi.org/10.1016/0013-7952(90)90007-n.

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32

Surajit, Ghoshal, S. Dedalal S., and C. Lahiri S. "Comparative study on the geographical, physical and engineering properties of soils of West Bengal. Part-II : Field test (experimental methods) working equations and engineering properties of soils of North Bengal." Journal of Indian Chemical Society Vol. 86, Jul 2009 (July 31, 2009): 703–10. https://doi.org/10.5281/zenodo.5814137.

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Department of Chemistry, Kalyani University, Kalyani-741 235. West Bengal, India Soil Mechanics Section, River Research Institute, West Bengal, P.O. HRRI, Nadia, West Bengal, India Emeritus Fellow, AICTE, Kalyani Government Engineering College, Kalyani-741 235, West Bengal, India E-mail : sujitclahiri@yahoo.com Manuscript received 10 December 2007, revised 27 February 2009, accepted 19 March 2009 The experimental methods for the determination of mechanical properties of soils based on field tests, the basic equations for the determination of the design values of the bearing capacity according to the load of the superstructure and the properties of the sub soils have been described. The mechanical (engineering) properties of soil samples of North Bengal have also been described.

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Braun, A. L., and Armando M. Awruch. "An Efficient Model for Numerical Simulation of the Mechanical Behavior of Soils. Part 2: Applications." Soils and Rocks 36, no. 2 (May 1, 2013): 171–82. http://dx.doi.org/10.28927/sr.362171.

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A numerical model to simulate the mechanical behavior of soils was introduced in Part 1 of this paper (also published in this issue). Detailed information about the analytical model were presented, where the critical state theory for soil mechanics was considered in the context of the elastoplastic formulation. Moreover, an efficient numerical formulation to deal with nonlinear applications was also presented, featuring important characteristics such as reduced integration techniques, explicit integration of the constitutive equation and a corotational formulation for the kinematical description of the continuum. In this second part of the present work, the numerical model proposed in the previous paper is applied to some classical examples of soil mechanics to demonstrate the applicability of the present formulation. Effects of a geometrically nonlinear approach over the numerical predictions are investigated and comparisons are performed taking into account results obtained by using a geometrically linear model. In addition, some comparisons are also carried out considering evaluations performed with different constitutive formulations in order to observe the mechanical behavior of the soil mass under different constitutive assumptions.

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Saffari, R., E. Nikooee, and G. Habibagahi. "The effect of microbial calcite precipitation on the retention properties of unsaturated fine-grained soils: discussion of the governing factors." E3S Web of Conferences 195 (2020): 05009. http://dx.doi.org/10.1051/e3sconf/202019505009.

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In recent years, biogeotechnology has been introduced as a novel and environmentally friendly technique for soil improvement. The need to address global warming and the adverse environmental effects of the chemical additives have led to the emergence and development of the techniques which use calcite producing microorganisms in order to improve soil mechanical properties. While the effects of microbial induced calcite precipitation (MICP) on the hydraulics and mechanics of saturated coarse-grained soils have been well examined and studied, there is not yet much information on the effects these microorganisms would have on the unsaturated soil mechanical behaviour. The first step, in this regard, is to understand the effect of the processes involved in the MICP on the soil retention properties. Soil water suction is a key factor controlling soil hydraulic and mechanical behaviour. In this study, the influence of MICP on the soil total suction in an unsaturated fine-grained soil sample has been explored using filter paper experiment. The results of this study revealed that by increasing the amount of bacterial solution, the soil saturation-total suction curves are significantly affected. The soil water retention changes are attributed to the change in double layer thickness as well as the precipitation of calcite crystals.

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Arenson, Lukas U., Sarah M. Springman, and Dave C. Sego. "The Rheology of Frozen Soils." Applied Rheology 17, no. 1 (February 1, 2007): 12147–1. http://dx.doi.org/10.1515/arh-2007-0003.

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Abstract The rheological behaviour of frozen soils depends on a number of factors and is complex. Stress and temperature histories as well as the actual composition of the frozen soil are only some aspects that have to be considered when analysing the mechanical response. Recent improvements in measuring methods for laboratory investigations as well as new theoretical models have assisted in developing an improved understanding of the thermo-mechanical processes at play within frozen soils and representation of their response to a range of perturbations. This review summarises earlier work and the current state of knowledge in the field of frozen soil research. Further, it presents basic concepts as well as current research gaps. Suggestions for future research in the field of frozen soil mechanics are also made. The goal of the review is to heighten awareness of the complexity of processes interacting within frozen soils and the need to understand this complexity when developing models for representing this behaviour.

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Gaskin, Paul N. "An introduction to the mechanics of soils and foundations through critical state soil mechanics." Canadian Geotechnical Journal 31, no. 2 (April 1, 1994): 318. http://dx.doi.org/10.1139/t94-038.

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Toll, D. "An introduction to the mechanics of soils and foundations: Through critical state soil mechanics." Geotechnical and Geological Engineering 11, no. 2 (June 1993): 155–56. http://dx.doi.org/10.1007/bf00423341.

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Fang, Ying Guang, Jia Liu, and Zhi Liang Dong. "Soil Elastic-Plastic Rotation Gradient Theory Based on Grain Size Factor and its Finite Element Implementation." Advanced Materials Research 779-780 (September 2013): 420–24. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.420.

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Soil is the most common discontinuous granular material in the geotechnical engineering and its physical and mechanical properties have obvious grain size effect. In view of the insufficient of classical continuum mechanics and existing discrete mechanics, the matrix-reinforcing particles cell element model of soil introduces to account for the grain size effect and microstructure of the soil; then, based on the rotation gradient theory, the elastic-plastic stress-strain relations of soil with grain size factor obtains; finally, using the principle of virtual work establishes the corresponding finite element method.

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Ravshanov, Hamrokul, Farmon Mamatov, Odil Primov, Shakhnoza Khazratkulova, and Dilshod Baratov. "Study on technological properties of winter wheat soils." E3S Web of Conferences 304 (2021): 03010. http://dx.doi.org/10.1051/e3sconf/202130403010.

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The aim of the study is to study and analyze the physical, mechanical and technological properties of soils from under winter grain crops in the hot climate of Uzbekistan. The results of determining the moisture content, density, hardness and resistance to various deformations of soils after harvesting winter wheat are presented. The basic principles and methods of classical mechanics, mathematical analysis and statistics were used in this study. Studies have found that, in the layer 0-30, the soil moisture for ten days after harvesting winter cereals decreases by 12.1-16.3%, and the soil hardness increases by 10.7-16.4% and are 3.22-5.14 MPa. At the same time, at an average humidity of 12-14%, the resistance of the soil to breakage and torsion, respectively, is 1.3-1.8 and 1.0-1.1 times higher than the resistance of the soil to shear. The resistance of the soil to shear is 87.9 kPa, and to breakage and torsion-69.7 and 78.6 kPa, respectively.

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Andreghetto, Dionatas, Lucas Festugato, Gustavo Miguel, and Andressa Silva. "Automated true triaxial apparatus development for soil mechanics investigation." Soils and Rocks 45, no. 2 (April 19, 2022): 1–10. http://dx.doi.org/10.28927/sr.2022.077321.

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Soil mechanical fully understanding requires considering a three dimensional approach, including soil response under the second principal stress and its potential anisotropy. In order to achieve such soil mechanical understanding, a true triaxial apparatus might be used. Therefore, in the present research an automated true triaxial apparatus was developed comprising its cubical cell, data acquisition and stress control systems. The manufactured apparatus was validated by means a laboratory test campaign where true triaxial test responses were compared to standard drained triaxial tests. True triaxial and standard drained triaxial tests were carried out on both naturally and artificially cemented soils. Results were gathered and compared. A soil mechanical compatibility was observed when test results of the newest true triaxial equipment were compared to test results obtained from a well validated standard triaxial apparatus. Thereby, the present paper reports an affordable successful true triaxial apparatus development demonstrating its efficiency for regular soil mechanical tests. Finally, a full stress rosette was established for a uniform fine sand where some small anisotropy was detected.

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Bertrand, GBAFFONOU, TANKPINOU KIKI Yvette, TOHOUNGBA Virtus, and S. GBAGUIDI Victor. "State of the Art in Unsaturated Soil Testing." Journal of Scientific and Engineering Research 8, no. 7 (July 31, 2021): 59–73. https://doi.org/10.5281/zenodo.10608732.

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Abstract In most soil mechanics laboratories, studies on soil behaviour are systematically carried out under saturated conditions in accordance with the TERZAGHI postulate. However, due to climatic conditions (arid, semi-arid, extreme continental), soils are often in a state of unsaturation and no longer meet Terzaghi's laws. These soils undergo alternating dry and wet seasons and are subject to drainage and humidification cycles. Depending on their nature, and especially in the case of fine soils, these variations in water status can lead to disorders due to phenomena such as swelling, shrinkage, or collapse. It is then necessary to have a good knowledge of these soils. To study unsaturated soils, it is then important to understand the phenomena which take place there and their mechanical behavior. The present article therefore proposes to present an overview of the different phenomena that characterize unsaturated soils and particularly the tests proposed to explain their mechanical behavior. Taking into account and controlling the unsaturated state of soils will allow to solve in a more efficient way the problems related to structures such as: embankment dams, dikes, road embankments, slopes, tunnels.

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Chen, Liuxin, Javad Ghorbani, Amir Tophel, and Jayantha Kodikara. "An unsaturated soil mechanics approach for performance-based intelligent compaction." E3S Web of Conferences 382 (2023): 12002. http://dx.doi.org/10.1051/e3sconf/202338212002.

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Intelligent compaction involves using instrumented rollers to provide real-time monitoring of the compacted ground using sensors such as accelerometers and GPS. This technology has the potential to improve productivity and uniformity in construction but its advancement is currently impeded due toinaccurate estimation of the physical ground properties, such as dry density, and the absence of robust quantitative models to predict the effect of compaction on the long-term performance of unsaturated soils under repeated loads. In this study, the compaction of the soil layers and subsequent deformations under repeated traffic loads are simulated by using an advanced computational framework and model for unsaturated soils. By employing an effective stress concept, the presented computational approach allows a unified description of soils at various degrees of saturation. In addition, the model can capture plastic deformations at the initiation of loading and thereby offer accurate predictions of soil behaviour under cyclic loads. Several numerical examples will be provided to demonstrate how the initial states of compacted soils affect the compaction efficiency and the long-term performance of compacted soils.

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Shang, Min, Qiang Xu, Shu Cai Li, and Lan Xin Zhang. "Research on Engineering Geology Properties of Residual Diorite in Jinan, Shandong Province, China." Advanced Materials Research 594-597 (November 2012): 434–38. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.434.

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Residual soils are weathering products of rocks that are commonly found under unsaturated conditions. Residual soil is one of special soils, and its engineering geology property is usually different because of the difference of resource rock type, the geology environment and weathering condition. By the means of analysis of the data attained by the methods of field exploration, laboratory test and testing in-situ, the physical and mechanical properties of the residual diorite in Jinan were studied deeply. It is proved that the stratigraphic section of the soil can be classified as two layers on the perpendicular direction. Considering the inhomogeneity of the residual soil mass and the widely divergence of the value of mechanics properties, the suggestion value of c, Φ , a, Es, fak were put forward for further guiding the engineering practice , on the base of physics and mechanics properties tests and the region practice experience. At the same time, it is pointed out that, at that region, the interlayer and inhomogeneity of the weathering layers should be emphasized in the process of projecting and constructing when the residual diorite acts as the foundation of the construction or one of the geologic layers.

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Krisnanto, S., E. Susila, A. Sahadewa, H. Nawir, E. Rismantojo, and D. Apriadi. "Introduction of unsaturated soil mechanics in Indonesia to improve the understanding on geotechnical engineering-related infrastructure problems." IOP Conference Series: Earth and Environmental Science 1065, no. 1 (July 1, 2022): 012001. http://dx.doi.org/10.1088/1755-1315/1065/1/012001.

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Abstract Several geotechnical engineering-related infrastructure problems cannot be quantified comprehensively using classical soil mechanics for saturated soils. This emphasizes the need of analysis using the framework of unsaturated soil mechanics (USM). The graduate course on soil mechanics for unsaturated soils is provided in Bandung Institute of Technology (ITB) to answer these challenges. The understanding on geotechnical engineering-related infrastructure problems in Indonesia is improved in the course. The understanding on the basic topics in USM is emphasized throughout the course. The balance between the eagerness for innovative design and the carefulness in the design is conveyed using the course. The laboratory testing apparatuses are being developed as a part of the course as well as a part towards the implementation of USM in Indonesia. An option of stages in introduction of USM in Indonesia is proposed.

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Yang, Hong Xia. "Study on Mechanical Model of Pile Under the Horizontal Axial Load Effect." Applied Mechanics and Materials 90-93 (September 2011): 213–16. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.213.

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According to the operating characteristics of pile which under the horizontal axial load effect,a mechanical model of pile and its surrounding soil interaction with pile shaft under horizontal axial load within elastic semi-infinite foundation was established.Based on the theory of elastic mechanics,mechanics of materials,soil mechanics,etc,solutions to undetermined parameters of mechanical models are deduced.The model in this paper has solid theoretical basis,few parameters,simple determine,and can reflect distributed rule of lateral soil resistance.Through the comparison of static loab test data of the pile foundation and the theoretical calculate value in some project,we know that the actual value and the theoretical calculate value were quite close,this have verified the correctness of the model.The calculation model has certain reference value to determine the horizontal axis bearing capacity of single pile.

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Alonso-Marroquin, Fernando, Hans Muhlhaus, and Hans Herrmann. "Micromechanical investigation of soil plasticity using a discrete model of polygonal particles." Theoretical and Applied Mechanics 35, no. 1-3 (2008): 11–28. http://dx.doi.org/10.2298/tam0803011a.

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The mechanical behavior of soils has been traditionally described using continuum-mechanics-based models. These are empirical relations based on laboratory tests of soil specimens. The investigation of the soils at the grain scale using discrete element models has become possible in recent years. These models have provided valuable understanding of many micromechanical aspects of soil deformation. The aim of this work is to draw together these two approaches in the investigation of the plastic deformation of non-cohesive soils. A simple discrete element model has been used to evaluate the effect of anisotropy, force chains, and sliding contacts on different aspects of soil plasticity: dilatancy, shear bands, ratcheting etc. The discussion of these aspects raises important questions such as the width of shear bands, the origin of the stress-dilatancy relation, and the existence of a purely elastic regime in the deformation of granular materials.

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Zhang, Dan, Yulong Gao, Guangya Wang, and Guanzhong Wu. "Apparatus development for contact mechanics of energy pile-soil interface." E3S Web of Conferences 205 (2020): 05009. http://dx.doi.org/10.1051/e3sconf/202020505009.

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An Energy Pile-Soil Interface Characteristic Apparatus (EPSICA) was developed to investigate the contact mechanics of the pile-soil interface. In the center of the apparatus, there is an energy pile model, around which different soil can be filled to simulate pile in different subsoil. The soil can be saturated. By applying loads on the top of the soil, the different depths were simulated. The temperature of energy piles was controlled by the cycling fluid with a water bath. The Pt100 sensors were installed in the pile and soil to measure the temperature changes. The miniature earth pressure cells were installed on the pile surface to measure the normal stress of the pile-soil interface. The FBG quasi-distributed optical fiber technology was used to measure the hoop strain to evaluate the circumferential deformation of the pile model. Taking the sand foundation as an example, the mechanical behavior of pile-soil contact behavior during the heating and cooling cycle was studied based on the temperature of pile and soil, normal stress of pile-soil interface and hoop strain of pile. The developed apparatus provides a new method for the study of thermos-mechanical behavior of energy pile.

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Konovalov, P. A., V. P. Konovalov, and F. F. Zekhniev. "TERMINOLOGICAL DICTIONARY ON FOUNDATION ENGINEERING, SOIL MECHANICS AND SOIL SCIENCE." Engineering Geology World 14, no. 2 (September 3, 2019): 82. http://dx.doi.org/10.25296/1993-5056-2019-14-2-82.

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Chuyanov, Dustmurod, Golib Shodmonov, Ibrat Ismailov, Gayrat Ergashov, and Akramjon Sadikov. "Traction resistance of the combined machine plough." E3S Web of Conferences 264 (2021): 04036. http://dx.doi.org/10.1051/e3sconf/202126404036.

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Subsoils are widely used on tillage and combination machines. The tiller of the combined machine for preparing the soil for sowing melons and gourds carries out strip loosening of the subsoil layers. The study aims to theoretically determine the traction resistance of a soil deepener of a combined machine for preparing the soil for sowing melons and gourds. The study uses the basic provisions of mathematics, theoretical mechanics, and agricultural mechanics. In studies, it is assumed that the destruction of the soil under the influence of the drill bit occurs by separation. The total traction resistance of the subsoiler was determined as the sum of the resistance of the rack and the bit. An analytical expression has been obtained to determine the traction resistance of a tilting machine with an inclined stand, depending on its design, technological parameters, and the physical and mechanical properties of the soil. As a result of theoretical studies, it was found that the traction resistance of the soil deepener is mainly influenced by its design parameters, the depth of soil cultivation, the physical and mechanical properties of the soil, and the speed of the machine.

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Ilyichev, V. A., N. S. Nikiforova, and A. V. Konnov. "Technological Soil Mechanics in Underground Construction." IOP Conference Series: Materials Science and Engineering 1079, no. 4 (March 1, 2021): 042056. http://dx.doi.org/10.1088/1757-899x/1079/4/042056.

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