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Journal articles on the topic 'Shear strength of soils Soil mechanics'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Morris, Peter H., J. Graham, and David J. Williams. "Cracking in drying soils." Canadian Geotechnical Journal 29, no. 2 (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

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2

Zhang, Xiao Ming, Qian Jin Liu, and Xing Xiu Yu. "Differences of Shear Strength between Undisturbed and Remolded Soils of Lands for Agriculture and Forestry in Menglianggu Watershed of Linyi City." Advanced Materials Research 599 (November 2012): 815–19. http://dx.doi.org/10.4028/www.scientific.net/amr.599.815.

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To find the effects of pedoturbation on soil erosion of lands for agriculture and forestry in Menglianggu watershed of Linyi city from soil mechanics, shear strengths of 3 typical land uses (6 different soils) which are undisturbed and remolded respectively were measured by direct shear apparatus. Effects of particle size and binding materials on shear strength were analyzed by comparing shear properties of undisturbed and remolded soils with the same dry density, water content and vertical loads. The results show that all the angle of internal friction ( ) and most of soil cohesion ( ) of und

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3

Bulolo, Sam, and Eng Choon Leong. "Modelling shear strength of compacted soils." E3S Web of Conferences 92 (2019): 15007. http://dx.doi.org/10.1051/e3sconf/20199215007.

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Compacted soils constitute most engineering projects such as earth dams, embankments, pavements, and engineered slopes because of their high shear strength and low compressibility. The shear strength of compacted soils is a key soil parameter in the design of earth structures but it is seldom determined correctly due to their unsaturated state. The shear strength of compacted soils can be better evaluated under the framework of unsaturated soil mechanics. Saturated and unsaturated tests were conducted on compacted specimens using conventional direct shear apparatus under constant water content

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4

Fraccica, Alessandro, Enrique Romero, Thierry Fourcaud, Mercedes Sondon, and Luis Gandarillas. "Tensile strength of a vegetated and partially saturated soil." E3S Web of Conferences 195 (2020): 03001. http://dx.doi.org/10.1051/e3sconf/202019503001.

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Vegetated soil’s shear strength has been usually assessed through direct shear tests and under triaxial compression stress paths while less is known about its behaviour under tensile stress. Tensile strength and shrinkage-induced cracking play a crucial role in the hydro-mechanical response of earth structures exposed to drying/wetting cycles. For this purpose, a new device for direct tensile tests has been designed and used to let plants grow in compacted soil samples. The equipment consists of two cylindrical moulds connected to each other by a soil bridge in which failure upon pulling is in

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5

Alamanis, Nikolaos, Philotheos Lokkas, Theodoros Chrysanidis, Dimitrios Christodoulou, and Evangelos Paschalis. "Assessment Principles for the Mechanical Behavior of Clay Soils." WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS 16 (August 4, 2021): 47–61. http://dx.doi.org/10.37394/232011.2021.16.6.

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The factors that determine the geotechnical behavior of soils are mainly their composition, the size of their grains and their moisture content. The design of a soil structure or foundation project must ensure the shear adequacy of the soil in all phases of construction and throughout the life of the project. However, the shear strength, in general, of the soil is not "constant" but depends on key external factors such as the prehistory of loads, the time and succession of load states, the overpressure of the pore water as well as other factors such as relative density, or any preload, the pre

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6

Stefaniuk, Damian, Matylda Tankiewicz та Joanna Stróżyk. "X-Ray Microtomography (μCT) as a Useful Tool for Visualization and Interpretation of Shear Strength Test Results". Studia Geotechnica et Mechanica 36, № 4 (2015): 47–55. http://dx.doi.org/10.2478/sgem-2014-0035.

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Abstract The paper demonstrates the applicability of X-ray microtomography (ìCT) to analysis of the results of shear strength examinations of clayey soils. The method of X-ray three-dimensional imaging offers new possibilities in soil testing. The work focuses on a non-destructive method of evaluation of specimen quality used in shear tests and mechanical behavior of soil. The paper presents the results of examination of 4 selected clayey soils. Specimens prepared for the triaxial test have been scanned using ìCT before and after the triaxial compression tests. The shear strength parameters of

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7

Maghsoodi, Soheib, Olivier Cuisinier, and Farimah Masrouri. "Thermal effects on mechanical behaviour of soil–structure interface." Canadian Geotechnical Journal 57, no. 1 (2020): 32–47. http://dx.doi.org/10.1139/cgj-2018-0583.

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Mechanical behaviour of the soil–structure interface plays a major role in the shear characteristics and bearing capacity of foundations. In thermoactive structures, due to nonisothermal conditions, the interface behaviour becomes more complex. The objective of this study is to investigate the effects of temperature variations on the mechanical behaviour of soils and the soil–structure interface. Constant normal load (CNL) and constant normal stiffness (CNS) tests were performed on the soil and soil–structure interface in a direct shear device at temperatures of 5, 22, and 60 °C. Fontainebleau

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8

Maghsoodi, Soheib, Olivier Cuisinier, and Farimah Masrouri. "Thermo-mechanical behaviour of clay-structure interface." E3S Web of Conferences 92 (2019): 10002. http://dx.doi.org/10.1051/e3sconf/20199210002.

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The mechanical behaviour of the soil-structure interface plays a major role in the shear characteristics and bearing capacity of foundations. In thermo-active structures, due to non-isothermal conditions, the interface behaviour becomes more complex. The objective of this study is to investigate the effects of temperature variations on the mechanical behaviour of soils and soil-structure interface. Constant normal load (CNL) and constant normal stiffness (CNS) tests were performed on soil and soil-structure interface in a direct shear device at temperatures of 5, 22 and 60 °C. Kaolin clay was

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9

Kaminski, P., M. Urlaub, J. Grabe, and C. Berndt. "Geomechanical behaviour of gassy soils and implications for submarine slope stability: a literature analysis." Geological Society, London, Special Publications 500, no. 1 (2019): 277–88. http://dx.doi.org/10.1144/sp500-2019-149.

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AbstractSubmarine slope failures pose a direct threat to seafloor installations and coastal communities. Here, we evaluate the influence of free gas on the soil's shear strength and submarine slope failures in areas with gassy soils based on an extensive literature review. We identify two potential destabilization mechanisms: gas bubbles in the pore space lead to a reduced shear strength of the soil and/or gas induces excess pore pressures that consequently reduce the effective stress in the soil. Our evaluation of the reported mechanical and hydraulic behaviour of gassy sediments indicates th

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10

Yang, Xiao Yan, Wen Bai Liu, Jia Jun Wang, and Wen Hui Shi. "The Research on the Mechanical Properties of the same Curing Agent of Different Soil Dredged Mud." Advanced Materials Research 800 (September 2013): 181–88. http://dx.doi.org/10.4028/www.scientific.net/amr.800.181.

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Through confined compression test and direct shear test, studied the mechanical properties of the same curing agent of different soil dredged mud, compared the difference of the same curing agent of different soil dredged mud. By confined compression test, the compression modulus of clay, silty sand and silty soil dredged mud after curing increases by 603.7%, 529.0% , 603.7% respectively. By direct shear test, the shear strength of clay dredged mud after curing increases to infinity; silty sands shear strength after curing increases by 209.1% in average; silty soils shear strength increases af

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11

Kim, Tae-Hyung, and Stein Sture. "Capillary-induced tensile strength in unsaturated sands." Canadian Geotechnical Journal 45, no. 5 (2008): 726–37. http://dx.doi.org/10.1139/t08-017.

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While a majority of the studies related to unsaturated soils have focused on volume change, flow, and shear strength behavior, investigations of tensile strength of unsaturated soils, especially granular soils, have not received much attention except for those on cemented and clayey soils. This paper focuses on fundamental studies of tensile strength properties of granular soils in the unsaturated state, which were examined experimentally and theoretically. Experimental studies have shown that it is possible to accurately measure the tensile strength of sands at water contents in the range of

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12

Sadrjamali, Marjan, Seyed Athar, and Alireza Negahdar. "Modifying Soil Shear Strength Parameters Using Additives in Laboratory Condition." Current World Environment 10, Special-Issue1 (2015): 120–30. http://dx.doi.org/10.12944/cwe.10.special-issue1.17.

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Mechanical and chemical processes and/or reinforcing materials are used in order to increase soil shear strength. Necessity for reinforcing and strengthening of soil in geotechnical and civil engineering projects requires use of new materials and reinforces. In recent years, although researchers have used new chemical compounds, however, nano-particles have not found their suitable situation. In this study, we have tried to increase soil shear strength parameters using different additives. Clay minerals are considered as problematic soils due to their engineering features. So, it is essential

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13

Konrad, J. M., and K. T. Law. "Undrained shear strength from piezocone tests." Canadian Geotechnical Journal 24, no. 3 (1987): 392–405. http://dx.doi.org/10.1139/t87-050.

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With the advent of piezocones — penetrometers measuring both the mechanical resistance and induced pore pressures near the tip during penetration into the soil — a new interpretation of penetrometer test data is possible. This paper presents a review of available interpretation methods for obtaining the undrained shear strength of soft soils, and introduces a new interpretation taking into account measured pore pressures. The undrained shear strength is considered to be solely related to the ultimate cavity expansion pressure, which is one of the components of the tip resistance. The other com

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14

Fredlund, Delwyn G. "The 1999 R.M. Hardy Lecture: The implementation of unsaturated soil mechanics into geotechnical engineering." Canadian Geotechnical Journal 37, no. 5 (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

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15

Tang, Liansheng, Haitao Sang, Liqun Jiang, Yinlei Sun, and Muhammad Ashraf. "New Progress in the Study of Intergranular Suction and Shear Strength of Unsaturated Soil." Earth Sciences Research Journal 20, no. 1 (2016): 1–13. http://dx.doi.org/10.15446/esrj.v20n1.54139.

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<p>The suction between soil particles is the basis and core problem in the study of unsaturated soil. However, is the suction between soil particles just the matrix suction, which has been widely used since the discipline of unsaturated soil mechanics was established. In fact, the concept of matrix suction is from soil science and reflects the water- absorbing capacity of the soil. Matrix suction characterizes the interaction between soil particles and pore water rather than the interactions between soil particles, which are not in conformity with the principle of the effective stress of

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16

Slebi-Acevedo, Carlos J., Daniel A. Zuluaga-Astudillo, Juan C. Ruge, and Daniel Castro-Fresno. "Influence of the Diatomite Specie on the Peak and Residual Shear Strength of the Fine-Grained Soil." Applied Sciences 11, no. 4 (2021): 1352. http://dx.doi.org/10.3390/app11041352.

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Diatomite is a powdering mineral mainly composed of diatom microfossils present in marine and lacustrine soils, which influences their physical and mechanical properties. Although many articles have been found in the literature concerning the influence of diatomite in the overall behavior of natural soils, few research efforts have been carried out to evaluate the influence of the diatom microfossil species on their shear resistance. Therefore, in this research, the influence of the diatomite species and the content in the peak and the residual shear strength of diatomite-fine grained soil mix

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17

Khasib, Isam Adnan, Nik Norsyahariati Nik Daud, and Noor Azline Mohd Nasir. "Strength Development and Microstructural Behavior of Soils Stabilized with Palm Oil Fuel Ash (POFA)-Based Geopolymer." Applied Sciences 11, no. 8 (2021): 3572. http://dx.doi.org/10.3390/app11083572.

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Using geopolymer in soil stabilization has gained much attention recently due to its efficiency in improving soil properties and being environmentally friendly at the same time. This research aims to investigate the effect of palm oil fuel ash (POFA)-based geopolymer on soft soil stabilization. The mechanical and microstructural performance of two types of clay soil treated with geopolymer produce from POFA material was the focus of this study. In this respect, a series of unconfined compression and direct shear tests were conducted to investigate the mechanical properties of soils treated wit

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18

Govers, G., and RJ Loch. "Effects of initial water content and soil mechanical strength on the runoff erosion resistance of clay soils." Soil Research 31, no. 5 (1993): 549. http://dx.doi.org/10.1071/sr9930549.

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Effects of antecedent water content and soil strength on the resistance to erosion by overland (rill) flow were tested for two clay soils of the eastern Darling Downs, Queensland. Both shear and unconfined compressive strength of wet soil (for soil wet to saturation immediately prior to application of rill flow) mere higher for soil with initially high water contents than for soil initially air-dry. Rates of runoff erosion did not show a simple relationship with soil strength across the two soils, though for each soil, higher strength was associated with much lower rates of erosion. The result

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19

Kouakou, N'guessan MoÏse, Olivier Cuisinier, Farimah Masrouri, Emmanuel Lavallée, and Tangi Le Borgne. "Estimation of the shear strength of a coarse soil with high fines content by parallel gradation method." E3S Web of Conferences 92 (2019): 06001. http://dx.doi.org/10.1051/e3sconf/20199206001.

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The determination of the mechanical properties of soils containing particles larger than the allowable size of standard laboratory equipments is complex. It is indeed necessary to remove the coarsest fraction to carry out the tests. This scalping poses a problem of reliability of the results at the scale of the structure. Parallel gradation is the method commonly used for estimating the shear strength of heterogeneous granular soils from tests on their finer fraction. However, the effect of high fines content on the estimation of shear strength by this method is not well understood. The result

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20

Locat, Jacques, and Normand Beauséjour. "Corrélations entre des propriétés mécaniques dynamiques et statiques de sols argileux intacts et traités à la chaux." Canadian Geotechnical Journal 24, no. 3 (1987): 327–34. http://dx.doi.org/10.1139/t87-043.

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The use of an ultrasonic accelerometer has led to an empirical correlation between the wave velocity and the static mechanical strength deducted from destructive tests made on intact or lime-treated clays, and to an evaluation of the influence of certain physical soil parameters on wave velocity. The results give a good correlation between the dynamic elastic properties deducted from the shear wave velocity and the static mechanical properties of the intact and the lime-treated clays when measured without confining pressure. The results also confirm that the maximum dynamic shear modulus is pr

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21

Huang, Bingquan, and Jitendra S. Sharma. "A coupled consolidation shear model for the process of formation of glaciated soils." Canadian Geotechnical Journal 45, no. 2 (2008): 226–37. http://dx.doi.org/10.1139/t07-092.

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It has been generally observed that the measured preconsolidation pressure values for glaciated soils are not compatible with the measured effective pressure values at the bed of the glacier if one-dimensional consolidation alone is considered as the formation process for these soils. In this paper, a new model for the process of formation of glaciated soil, termed the coupled consolidation shear (CCS) model, is developed using the frameworks of critical state soil mechanics and small-strain consolidation theory. The CCS model includes simultaneous shearing and consolidation of subglacial sedi

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22

Hatami, Kianoosh, Jaime E. Granados, Danial Esmaili, and Gerald A. Miller. "Reinforcement Pullout Capacity in Mechanically Stabilized Earth Walls with Marginal-Quality Soils." Transportation Research Record: Journal of the Transportation Research Board 2363, no. 1 (2013): 66–74. http://dx.doi.org/10.3141/2363-08.

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Pullout capacity of geotextile reinforcement is an important consideration in the analysis of internal stability of reinforced soil structures, especially those constructed with marginal soils. Precipitation, ground water infiltration, and seasonal variations of water content during the construction process or service life of the structure could result in significant reductions in the matric suction and lead to a reduction in the strength of the soil–geotextile interface. Consequently, the reinforced soil structure may experience unacceptable deformations or even failure during its constructio

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23

Yildiz, Anil, Frank Graf, and Sarah M. Springman. "Volume change behavior of root-permeated soils under partially saturated conditions." E3S Web of Conferences 195 (2020): 01007. http://dx.doi.org/10.1051/e3sconf/202019501007.

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Vegetation, particularly roots, serves different functions in relation to increased shear strength under saturated and partially saturated conditions. Quantification of mechanical contribution of roots due to their tensile strength, and relationships of various vegetation parameters and plant-induced suction, as well as shear strength, have been widely studied. Although shear strength is directly related to the volume change characteristics of soil, dilative or contractive behaviour of root-permeated soils has not been of significant interest so far. This study investigates how volume change d

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Jili, Qu, and Zhu Hao. "Modifying mechanical properties of Shanghai clayey soil with construction waste and pulverized lime." Science and Engineering of Composite Materials 27, no. 1 (2020): 163–76. http://dx.doi.org/10.1515/secm-2020-0016.

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AbstractIn the present study, the effect of construction waste and pulverized lime on the strength of Shanghai clayey soil is investigated. The unconfined compressive strength and direct shear tests have been carried out on reinforced soils with different combinations of construction waste and pulverized lime over various curing periods. The results from unconfined compressive tests show that the compressive strength increases after introduction of construction waste and pulverized lime, and the longer the curing period the higher the strength of treated soil. The results from direct shear tes

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Puzrin, A. M., and L. N. Germanovich. "The growth of shear bands in the catastrophic failure of soils." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 461, no. 2056 (2005): 1199–228. http://dx.doi.org/10.1098/rspa.2004.1378.

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This paper is an attempt to apply the Palmer–Rice fracture mechanics approach to the shear band propagation in sands and normally consolidated clays. This approach, proposed 30 years ago for overconsolidated clays, had a tremendous advantage of treating a shear band evolution as a true physical process and not just as a sufficient mathematical condition for its existence. Extension of this approach to a wider variety of soils requires for non-elastic soil properties (e.g. isotropic hardening plasticity, strain softening, lack of tensile strength, dilatancy, active and passive failure modes, et

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26

Yang, Chao, John P. Carter, and Daichao Sheng. "Description of compression behaviour of structured soils and its application." Canadian Geotechnical Journal 51, no. 8 (2014): 921–33. http://dx.doi.org/10.1139/cgj-2013-0265.

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One of the most distinct characteristics of structured soils is the nonlinearity in the normal compression lines in a plot of specific volume or voids ratio against logarithmic mean or vertical effective stresses, when compared with reconstituted soils. The change in the compressibility (or compression index) with loading is attributed to structure degradation and is expressed as a function of the plastic straining. A direct description of the compression behaviour of structured soil is then established. The validity of this approach is examined via merely incorporating the newly defined norma

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27

Liao, Mengke, Yuanming Lai, and Chong Wang. "A strength criterion for frozen sodium sulfate saline soil." Canadian Geotechnical Journal 53, no. 7 (2016): 1176–85. http://dx.doi.org/10.1139/cgj-2015-0569.

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Salt content has been proven to be an important influencing factor on the mechanical properties of frozen saline soils, whose strength criterion is different from that of unfrozen saline soils or frozen soils without salts. In this paper, a series of conventional triaxial tests are carried out for frozen saline soils with sodium sulfate at a temperature of –6 °C. A strength criterion of the frozen saline soils, including the influence of salt content, is established by using the generalized nonlinear strength theory. Based on conventional triaxial test results, a modified hydrostatic pressure

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28

Zhao, Yingying, Yang Yang, Xianzhang Ling, Guoyu Li, and Weiming Gong. "Mechanical Behaviors of Natural Sand Soils and Modified Soils in Heavy-Haul Railway Embankment." Advances in Civil Engineering 2020 (August 27, 2020): 1–12. http://dx.doi.org/10.1155/2020/8843164.

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The addition of chemical or mechanical materials, such as fibers or stabilizers, is frequently utilized in geotechnical engineering to improve the mechanical properties of problematic soils. In this study, great efforts have been made to obtain insight into the mechanical properties of the natural, fiber, and chemical additive-stabilized soil in heavy-haul railway embankment. A series of triaxial compression tests are conducted on the stabilized samples of different preparation conditions, including water content, compaction degree, confining pressure, fiber content, fiber length, stabilizer c

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29

Wang, Y. H., and W. K. Siu. "Structure characteristics and mechanical properties of kaolinite soils. II. Effects of structure on mechanical properties." Canadian Geotechnical Journal 43, no. 6 (2006): 601–17. http://dx.doi.org/10.1139/t06-027.

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This paper reports the effects of structure on the mechanical responses of kaolinite with known and controlled fabric associations. The dynamic properties and strength were assessed by resonant column tests and undrained triaxial compression tests, respectively. The experimental results demonstrate that interparticle forces and associated fabric arrangements influence the volumetric change under isotropic compression. Soils with different structures have individual consolidation lines, and the merging trend is not readily seen under an isotropic confinement up to 250 kPa. The dynamic propertie

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30

Abdulla, Rozan, and Nadhmiah Majeed. "Enhancing Engineering Properties of Expansive Soil Using Marble Waste Powder." Iraqi Geological Journal 54, no. 1E (2021): 43–53. http://dx.doi.org/10.46717/igj.54.1e.4ms-2021-05-25.

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Owing to its propensity to swell when in contact with water, expansive soil causes severe structural problems and shrinks when they dry out. Soil stabilization is a well-known method used to enhance the soil's physical and engineering properties and is commonly adopted for improving soil structures. The mechanical stabilization of different soils is evaluated by adding varying proportions of marble dust (10, 20, 30 percent) of Penjwen, Said Sadiq and Pirmam marble waste powder) to expansive soil. Shear strength and consolidation parameters, such as void ratio, compression index, and sample swe

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Burns, Susan E., and Paul W. M. ayne. "Small- and High-Strain Measurements of in Situ Soil Properties Using the Seismic Cone Penetrometer." Transportation Research Record: Journal of the Transportation Research Board 1548, no. 1 (1996): 81–88. http://dx.doi.org/10.1177/0361198196154800112.

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Seismic cone penetration tests provide an economical and expedient means of assessing small-strain properties (low-amplitude shear modulus, GMAX) and large-strain behavior (shear strength, τmax) of soil deposits from a single sounding. That measurements are taken at complete opposite ends of the strain spectrum permits development of the entire stress-strain-strength representation of soil layers with depth. A modified hyperbola is shown to be appropriate in a modulus degradation scheme for application to static monotonic loading of soils. Also, a global correlation of mass density (ρ) with sh

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Wang, Yuan Long, Jun Gao Zhu, and Jian Fang Zhou. "Study on Stress-Strain Behavior of Cohesive Soil Mixing with Gravel by Triaxial Test." Advanced Materials Research 446-449 (January 2012): 1573–76. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.1573.

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The mechanical behaviors of a cohesive soil mixing with gravel were investigated in consolidated-drained triaxial tests. Three soils with different percentages of gravel mixed with the cohesive soil, i.e. 50%, 75% and 87.5%, were tested, and the inference of gravel percentage to the stress-strain behavior is investigated. The results indicate that the shear strength of the soil increases with the increase of gravel percentage. Compared to peak strength of GP50, that of GP75 and GP87.5 increases by 14.4%~32.8% and 20.9%~40.5%. The initial and secant Young’s modulus of the soil increases signifi

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Chu, Chengfu, Fei Zhang, Daoxiang Wu, Meihuang Zhan, and Yun Liu. "Study on Mechanical Properties of the Expansive Soil Treated with Iron Tailings Sand." Advances in Civil Engineering 2021 (April 22, 2021): 1–11. http://dx.doi.org/10.1155/2021/9944845.

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Aiming at researching shear strength parameters of expansive soil modified by industrial waste iron tailings sand, the enhancement of expansive soil is explored from macroscopic and microscopic aspects. After characterization and testing by various means, the results show that expansive soil modified by iron tailings sand will increase the maximum dry density of the improved soil and reduce its optimal moisture content, which is beneficial in tuning the moisture content at the construction site. In addition, iron tailings sand can improve the shear strength of expansive soils. The influence of

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Moscariello, Mariagiovanna, Carmine Gerardo Gragnano, Sabatino Cuomo, Irene Rocchi, and Guido Gottardi. "Shear strength and retention models of a partially saturated riverbank silty soil." E3S Web of Conferences 195 (2020): 01011. http://dx.doi.org/10.1051/e3sconf/202019501011.

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Soil mechanical behaviour is strictly related to its natural water content, which is primarily dependent on hydraulic boundary conditions. When soils are partially saturated, as frequently occur in river embankments, soil suction also turns into a fundamental variable worth of investigation and monitoring, both in laboratory and in the field, for a reliable interpretation of the related soil response to external actions. The case of earthen water retaining structures and their safety condition assessment towards local or global collapse mechanisms requires special attention for soil characteri

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35

Lo, S. R., and S. PR Wardani. "Strength and dilatancy of a silt stabilized by a cement and fly ash mixture." Canadian Geotechnical Journal 39, no. 1 (2002): 77–89. http://dx.doi.org/10.1139/t01-062.

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The mechanical behaviour of a weakly cemented silt was studied experimentally. The cementing agent was a cement and fly ash slurry, and the samples so formed were slightly cemented. In triaxial testing, both drained and undrained tests on saturated samples were conducted. Special zero effective stress tests were conducted to measure, directly, the contribution of bonding between grains to the enhanced strength and stiffness. The cemented soils were initially less dilatant than their respective parent soils but eventually became more dilatant than the parent soils. The shear strength data follo

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Cheng, Shukai, Qing Wang, Jiaqi Wang, and Yan Han. "Experimental Study on Undrained Shear Properties of Saline Soil under Freeze-Thaw Cycles." Geofluids 2021 (August 15, 2021): 1–12. http://dx.doi.org/10.1155/2021/9987414.

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The freeze-thaw cycle is an important external factor affecting the hydromechanical characteristics of saline soil in cold regions. Due to the presence of water and salt, it has a greater impact on stability. The construction of various projects, such as ditch fills and road subgrades, has mostly used disturbed soils. Therefore, this article takes remolded saline soil in Qian’an, Jilin Province, China, as the research object to evaluate the action of freeze-thaw cycles on the critical state line, effective stress path, pore water pressure-strain relationship, stress-strain relationship, shear

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Rohde, John R., Barry T. Rosson, and Richard Smith. "Instrumentation for Determination of Guardrail-Soil Interaction." Transportation Research Record: Journal of the Transportation Research Board 1528, no. 1 (1996): 109–15. http://dx.doi.org/10.1177/0361198196152800111.

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A series of steel posts (W150 × 12.6) and timber posts (15.2 × 20.3 cm) were instrumented with soil pressure transducers to assess the soil-post load response to a 1,388-kg bogie striking the post at 33 km/hr. Soil pressure measurements demonstrated the dramatic effects of soil shear strength and modulus on the responses of both timber and wood posts. The differences in the failure mechanisms between stiff and soft cohesive soils and noncohesive soils are demonstrated by both stress distributions and total stresses measured by the pressure transducers. The measurement system has potential appl

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Abiodun, Abiola Ayopo, and Zalihe Nalbantoglu. "Lime pile techniques for the improvement of clay soils." Canadian Geotechnical Journal 52, no. 6 (2015): 760–68. http://dx.doi.org/10.1139/cgj-2014-0073.

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Soil improvement is one of the basic requirements for preparing in situ soils for appropriate strengthening, stiffness, and stability in civil engineering designs and applications. The modification technique, which involves mechanical, thermal, and chemical components, requires monitoring techniques to determine its efficiency and suitability. This study examines the geotechnical improvement of clay soils using the lime pile technique on a laboratory-scale model. The clay–lime physicochemical reactions resulting from cation exchange were examined through basic experimental analyses. In additio

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Žurinskas, Darius, Danutė Vaičiukynienė, Gediminas Stelmokaitis, and Viktoras Doroševas. "Clayey Soil Strength Improvement by Using Alkali Activated Slag Reinforcing." Minerals 10, no. 12 (2020): 1076. http://dx.doi.org/10.3390/min10121076.

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There are many studies related to using alkali activated binders for the improvement of clayey soil mechanical properties. In this study, alkali activated slag (AAS) for the improvement of clayey soil strength was used and it reinforced the clay. This paper presents results of an investigation on the utilization of ground-granulated blast-furnace slag in the reinforcement of clay soils. Therefore, significant cost savings could be achieved by using alkali activated slag as binding material. These samples were analyzed by X-Ray fluorescence analysis (XRF), X-Ray diffraction (XRD), scanning elec

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Stoppe, Nina, and Rainer Horn. "Microstructural strength of tidal soils – a rheometric approach to develop pedotransfer functions." Journal of Hydrology and Hydromechanics 66, no. 1 (2018): 87–96. http://dx.doi.org/10.1515/johh-2017-0031.

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Abstract Differences in soil stability, especially in visually comparable soils can occur due to microstructural processes and interactions. By investigating these microstructural processes with rheological investigations, it is possible to achieve a better understanding of soil behaviour from the mesoscale (soil aggregates) to macroscale (bulk soil). In this paper, a rheological investigation of the factors influencing microstructural stability of riparian soils was conducted. Homogenized samples of Marshland soils from the riparian zone of the Elbe River (North Germany) were analyzed with am

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Wang, Le Hua, Jia Cheng Wang, and Jian Lin Li. "The Large-Scale Direct Shear Test on Gravel Soil with Different Water Content in Badong of Three Gorges Reservoir Region." Advanced Materials Research 243-249 (May 2011): 2035–38. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2035.

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The high cut slope of reservoir-bank road and city buildings are mostly earth-rock mixture after excavation. The strength behavior of the gravelly soil is important for mechanism of landslide triggering and soil erosion in Badong high cut slope. With the impact of rainfall, the water content of gravel soil increases, and the water table changes, this eventually affects the mechanical properties of gravel soils. Taking high cut slope which formed in the course of relocation in Three Gorges Reservoir as its background, the paper selected the gravel soil of typical high cut slope in Badong new to

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Zhang, Jingwei, Jia Li, Julong Wang, and Shuaiqi Xu. "Characteristics of the Interface between Bamboo Grids and Reinforced Soil of High-Filled Embankments in Loess Areas." Advances in Civil Engineering 2021 (July 19, 2021): 1–13. http://dx.doi.org/10.1155/2021/5135756.

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There are a large number of high-filled and deep-dug highways in loess areas. The differential settlement between the filled and undisturbed soils is the main cause of damage. Bamboo grids are good reinforcement and flexural tensile materials for highway subgrades, and the properties of the interface between the bamboo grid and loess soil affect the safety and stability of embankments. First, the feasibility of bamboo grid application in high-filled embankments in loess areas was verified based on a durability analysis and test of the mechanical properties of bamboo. Then, a series of large-sc

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Collis-George, N., and P. Yoganathan. "The effect of soil strength on germination and emergence of wheat (Triticum aestivum L.). II. High shear strength conditions." Soil Research 23, no. 4 (1985): 589. http://dx.doi.org/10.1071/sr9850589.

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Experimental studies on limiting soil strength conditions for germination and emergence of wheat are reported. From the experimental results in a fine, dense sand a quantitative estimate of the stresses at the organ/soil interface that will prevent seed and seedling expansion and hence prevent germination and emergence is made using the Spherical Cavity Expansion Theory of Vesic. Interfacial stresses of 3.0, 2.3, 1.7 and 0.8 MPa (=30, 23, 17 and 8 bar) are found to be limiting to germination, root elongation, coleoptile elongation and emergence of wheat respectively. These results are discusse

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Hoyos, Laureano, Roya Davoodi-Bilesavar, Ujwalkumar Patil, Jairo Yepes-Heredia, Diego Pérez-Ruiz, and José Cruz. "Behavior of unsaturated cohesive-frictional soils over a whole range of suction/thermo-controlled stress paths and modes of deformation." Soils and Rocks 44, no. 3 (2021): 1–12. http://dx.doi.org/10.28927/sr.2021.066621.

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The present work documents some of the most recent experimental evidence of the thermohydro-mechanical behavior of compacted soils over a whole range of suction- and/or thermo-controlled stress paths and modes of deformation, including data from a series of triaxial, true triaxial, plane strain, ring shear, and resonant column tests conducted on different types of cohesive-frictional soils in the low-to-medium matric suction range under either room temperature or thermally controlled conditions. The work has been accomplished at the Advanced Geomechanics Laboratory of the University of Texas a

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Yang, Zhao Hui, Xiao Yu Zhang, and Run Lin Yang. "Shake Table Modeling of Laterally Loaded Piles in Liquefiable Soils with a Frozen Crust." Applied Mechanics and Materials 204-208 (October 2012): 654–58. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.654.

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One of the most important lessons learned from Alaska’s two major earthquakes in history is that the lateral spreading of frozen crust overlying on liquefiable soils generates significant lateral forces and have induced wide bridge foundation damages. When the ground crust is frozen, its physical properties including stiffness, shear strength and permeability will change substantially. A shake table test was conducted to study the soil-pile interaction in liquefiable soils with a frozen crust. Cemented sands were used to simulate the frozen crust and have successfully captured the mechanical p

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Wu, Bohong, Guihe Wang, Jiong Li, Yu Wang, and Baolin Liu. "Determination of the Engineering Properties of Submarine Soil Layers in the Bohai Sea Using the Piezocone Penetration Test." Advances in Civil Engineering 2018 (December 5, 2018): 1–13. http://dx.doi.org/10.1155/2018/9651045.

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Due to the complexity of marine geotechnical engineering, the harsh operating environments, loose subsea soils, and high water contents, it is extremely difficult to obtain soil samples while maintaining the in situ conditions in offshore areas. The engineering properties of submarine soil layers in the Bohai Sea, China, were investigated in this work. The Wison-APB borehole wireline piezocone penetration test (CPTU) system was used to conduct direct measurements of the cone tip resistance, sleeve friction, and pore pressure. The soil classification and the related soil properties, such as the

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Xue, Chen, Xingang Wang, and Kai Liu. "Effect of Soaking Time and Salt Concentration on Mechanical Characteristics of Slip Zone Soil of Loess Landslides." Water 12, no. 12 (2020): 3465. http://dx.doi.org/10.3390/w12123465.

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Loess landslides are closely related to the variation in mechanical properties of soils due to the leaching of irrigation water in the irrigation area which causes the loss of soluble salt in the loess stratum. To investigate the effect of leaching on the mechanical characteristics of loess, ring shear tests were conducted on the slip zone soil samples obtained from a typical loess landslide under different soaking time and salt concentration. Furthermore, the microstructural observations were made on shear planes by using SEM (scanning electron microscopy) tests. The experiment revealed that:

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Barbour, S. L., and N. Yang. "A review of the influence of clay–brine interactions on the geotechnical properties of Ca-montmorillonitic clayey soils from western Canada." Canadian Geotechnical Journal 30, no. 6 (1993): 920–34. http://dx.doi.org/10.1139/t93-090.

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Natural Ca-montmorillonite clay soils or engineered clay barriers in western Canada are often used to contain brine generated from the surface disposal of potash tailings or from drilling activities associated with the oil and gas industry. The performance of these barriers has ranged from excellent to poor. The influence of salt brines on the geotechnical properties of these soils has been recognized as a potentially important factor for some time. It has been well documented in the literature that the behavior of clayey soils is strongly influenced by physicochemical interactions between cla

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Arroyo, Hiram, Eduardo Rojas, María de la Luz Pérez-Rea, Jaime Horta, and José Arroyo. "Simulation of the shear strength for unsaturated soils." Comptes Rendus Mécanique 341, no. 11-12 (2013): 727–42. http://dx.doi.org/10.1016/j.crme.2013.10.005.

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Su, Jiaxing, David Frost, and Alejandro Martínez. "Three-dimensional numerical assessment of axial and torsional interface shear behaviour." E3S Web of Conferences 92 (2019): 13016. http://dx.doi.org/10.1051/e3sconf/20199213016.

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Interfaces between geo-materials and soils play a critical role in a wide spectrum of geotechnical structures and soil/site characterization techniques in geotechnical engineering. Consequently, understanding the mechanics of interface shear behaviour at different scales can benefit both soil characterization and the design of geotechnical systems. This paper presents a series of numerical simulations that utilize the 3D discrete element modelling (DEM) technique and compares the results with those obtained from laboratory counterpart tests under axial and torsional axisymmetric interface shea

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