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Effect of a less permeable stronger soil layer on the stability of non-homogeneous unsaturated slopes

Nabarun DEY, Aniruddha SENGUPTA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6, Pages 1462-1475 doi: 10.1007/s11709-020-0674-8

Abstract: failure occurs due to an increase in the saturation level and a subsequent decrease in matric suction in unsaturatedsoil.presents the results of a series of centrifuge experiments and numerical analyses on a 55° inclined unsaturatedA discontinuity of the shear zone is also observed for the case of a non-homogeneous soil slope.The factor of safety of a non-homogeneous, unsaturated soil slope decreases because of the less permeable

Keywords： non-homogeneous slope stronger soil layer factor of safety centrifuge model test unsaturated soils

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Behavior of materials for earth and rockfill dams: Perspective from unsaturated soil mechanics

Eduardo E. ALONSO, Rafaela CARDOSO,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 1-39 doi: 10.1007/s11709-010-0013-6

Abstract: In a broad sense they are compacted materials and therefore unsaturated materials.They are analysed because their use, as well as the use of mixtures of soil and rock, is becoming more

Keywords： dams unsaturated soil mechanics suction rockfill clayey soil mixture

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Soil-water interaction in unsaturated expansive soil slopes

ZHAN Liangtong

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2, Pages 198-204 doi: 10.1007/s11709-007-0023-1

Abstract: The intensive soil-water interaction in unsaturated expansive soil is one of the major reasons for slopeIn this paper, the soil-water interaction is investigated with the full-scale field inspection of rainwaterIt is demonstrated that the soil-water interaction induced by seasonal wetting-drying cycles is veryIn addition, the abundant cracks in the expansive soil play an important role in the soil-water interactionInfiltration of rainwater not only results in wetting-induced softening of the shallow unsaturated soil

Keywords： strength intensive soil-water comprehensive Infiltration wetting-induced softening

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Application of fractal theory to unsaturated soil mechanics

XU Yongfu, TONG Lixin

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4, Pages 411-421 doi: 10.1007/s11709-007-0056-5

Abstract: the structure and hydraulic properties of unsaturated soils.In this paper, the soil-water characteristics, unsaturated hydraulic conductivity function, unsaturatedThe predictions of the proposed soil-water characteristics, unsaturated hydraulic conductivity, unsaturatedof the both fractal model and the van Genuchten-Mualem model were also performed, and it was found thatthe predictions of the fractal model were better than that of the van Genuchten-Mualem model.

Keywords： selection soil-water independent physical unsaturated strength

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Assessment of future climate change impacts on water-heat-salt migration in unsaturated frozen soil using

Hanli Wan, Jianmin Bian, Han Zhang, Yihan Li

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 1, doi: 10.1007/s11783-020-1302-5

Abstract: Abstract • A model coupling water-heat-salt of unsaturated frozen soil was established. • Future temperatureThe transport mechanisms of water, heat, and salt in unsaturated frozen soil, as well as its responseIn this study, western Jilin Province in north-eastern China was studied to produce a model of coupledwater-heat-salt in unsaturated frozen soil using CoupModel.The water, heat, and salt dynamics of unsaturated frozen soil under three representative concentration

Keywords： Soil salinization Climate change Unsaturated frozen soil Water-heat-salt balance Soil environment change

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Coupled solid-fluid FE-analysis of an embankment dam

Michael PERTL, Matthias HOFMANN, Guenter HOFSTETTER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1, Pages 53-62 doi: 10.1007/s11709-010-0084-4

Abstract: A coupled solid-fluid FE-model for partially saturated soils, characterized by modeling the soil as athree-phase material consisting of a deformable soil skeleton and the fluid phases water and air, isAs a constitutive model for the soil skeleton, the well-known Barcelona Basic model (BBM) is employedThe coupled FE-model is applied to the coupled transient numerical simulation of the water flow and the

Keywords： multi-phase model unsaturated soil model Barcelona Basic model (BBM) return mapping algorithm embankment

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Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3, Pages 378-387 doi: 10.1007/s11709-022-0808-2

Abstract: This study presents stability analyses of layered soil slopes in unsaturated conditions and uses a limitequilibrium method to determine the factor of safety involving suction stress of unsaturated soil.The obtained results show that larger suction stress provided in unsaturated clay dominates the stabilityInfiltration/evaporation can obviously affect the stability of unsaturated layered slopes, but theirinfluences depend on the soil property and thickness of the lower soil layer.

Keywords： slope stability suction stress unsaturated soil layered slope limit equilibrium

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Stable expression and control parameters in the numerical simulation of unsaturated flow

Zhiyuan ZHANG; Xu LI; Yongkang WU; Xiaokang LI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12, Pages 1501-1514 doi: 10.1007/s11709-022-0893-2

Abstract: The Richards’ equation describes the flow phenomenon in unsaturated porous media and is essential toFor the h-form Richards’ equation, the hydraulic conductivity of the soil in the low-suction rangefindings can provide a helpful reference for improving the reliability of numerical simulations of unsaturated

Keywords： Richards’ equation sensitivity analysis unsaturated soil hydraulic diffusivity seepage simulation

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Determination of effective stress parameter of unsaturated soils: A Gaussian process regression approach

Pijush Samui, Jagan J

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2, Pages 133-136 doi: 10.1007/s11709-013-0202-1

Abstract: capability of Gaussian process regression (GPR) for prediction of effective stress parameter ( ) of unsaturatedsoil.The results show that the developed GPR is reliable model for prediction of of unsaturated soil.

Keywords： unsaturated soil effective stress parameter Gaussian process regression (GPR) artificial neural network

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The Analysis of Dangerous Volumetric Water Content of Unsaturated Soil Slope

Zhang Shilin,Wang Dongmei,Li Genhua

Strategic Study of CAE 2004, Volume 6, Issue 5, Pages 71-75

Abstract:

This article mainly formulates that rainfall seeping makes the volumetric water of unsaturated soilThat means soil suction changes with the stability of whole unsaturated soil slope, that is, the safetysoil slope also is danger.By monitoring the volumetric water condition changing of unsaturated soil slope, some information ofunsaturated soil slope stability can be obtained.

Keywords： unsaturated soil stability analysis rainfall seeping volumetric water soil suction

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Stress-strain relationship with soil structural parameters of collapse loess

SHAO Shengjun, LONG Jiyong, YU Qinggao

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2, Pages 151-160 doi: 10.1007/s11709-008-0020-z

Abstract: Through the tri-axial shearing tests of unsaturated intact loess and based on the concept of comprehensivesoil structural potential, this paper reveals the changing laws of soil structural property under theestablishes a mathematical expression equation of structural parameters, whereby reflecting the effects of unsaturatedFinally, the constitutive model is established to reflect the variation in loess structure, stress-strainrelationship are found to be in good conformity with test results, whereby testing the rationality of the model

Keywords： hardening shearing expansion unsaturated structural property mathematical expression

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The Principle of Interaction Between Plastic Volumetric and Shear Strains for Unsaturated Soils

Wang Jingtao

Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 11-15

Abstract: paper, the principle of interaction between plastic volumetric and shear strains for rock and soilhas been extended to the field of unsaturated soils.of suction-plastic volumetric strain and pore air pressure-plastic volumetric strain appear in the unsaturatedstate of a soil besides the interaction between plastic volumetric and shear strains.theoretically proved by application of this principle of interaction that the critical state line for unsaturated

Keywords： the principle of interaction between plastic volumetric and shear strains unsaturated soil matric suction

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Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions

Frontiers of Structural and Civil Engineering Pages 915-934 doi: 10.1007/s11709-023-0907-8

Abstract: A fictitious soil pile (FSP) model is developed to simulate the behavior of pipe piles with soil plugsThe developed model simulates the base soil with a fictitious hollow pile fully filled with a soil plugand soil plug is considered.The motions of the pile−soil system are solved by discretizing them into spring-mass model based on thepipe pile toe, and some guidance is provided for the selection of the model parameters.

Keywords： fictitious soil pile soil plug pipe piles high-strain dynamic analysis one-dimensional wave theory

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A constrained neural network model for soil liquefaction assessment with global applicability

Yifan ZHANG, Rui WANG, Jian-Min ZHANG, Jianhong ZHANG

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5, Pages 1066-1082 doi: 10.1007/s11709-020-0651-2

Abstract: A constrained back propagation neural network (C-BPNN) model for standard penetration test based soilThe C-BPNN model design procedure for liquefaction assessment is established by considering appropriatecontent adjustment are shown to be able to improve the prediction success rate of the neural network model, and are thus adopted as constraints for the C-BPNN model.The C-BPNN liquefaction model is shown to have improved prediction accuracy and high global adaptability

Keywords： soil liquefaction assessment case history dataset constrained neural network model existing knowledge

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Nonlinear elastic model for compacted clay concrete interface

R. R. SHAKIR, Jungao ZHU

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2, Pages 187-194 doi: 10.1007/s11709-009-0033-2

Abstract: In this paper, a nonlinear elastic model was developed to simulate the behavior of compacted clay concreteThe clay soil used in the test was collected from the “Shuang Jang Kou” earth rockfill dam project.The mathematical relations were then incorporated into the interface model.The performance of the model is verified with the experimental results.The verification shows that the proposed model is capable of predicting the interface shear stress versus

Keywords： interface modeling friction soil structure interface soil structure interaction simple shear test