Active earth pressure for soils with tension cracks under steady unsaturated flow conditions

Yang, Xiaoli

doi:10.1139/cgj-2017-0713

Cited by 38 publications

(8 citation statements)

References 29 publications

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“…Based on this equation, Srivastava and Jim 36 proposed the closed-form for the one-dimensional form to obtain the matric suction at different depths. Subsequently, Li and Yang 2 , 4 used it to solve the matric suction for backfill soil of retaining walls, and carried out an in-depth analysis of the influence parameters. In this study, this idea is referred to obtain matric suction of retaining walls considering transpiration.…”

Section: Analytical Solution Of Matric Suction Considering Transpirat...mentioning

confidence: 99%

“…Based on unsaturated shear strength theory, traditional methods for calculating earth pressure have been extended [16][17][18][19][20] . Meanwhile, the conditions, i.e., rainfall [20][21][22] , groundwater 5,23 , and evaporation 4,5 , that can change the unsaturated state of the soil are often considered in these theories, and the results show that the unsaturated state has a significant effect on the earth pressure of retaining wall.However, the influence of plant growing behind the retaining wall (Fig. 1) on earth pressure is ignored in the existing theoretical methods [1][2][3][4][5][6][7][8] .…”

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confidence: 99%

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Method for efficient calculating earth pressure of retaining wall considering plant transpiration

Zhang,

Hu,

et al. 2023

Sci Rep

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An accurate estimation of earth pressure on retaining walls is imperative to achieving its design. This paper presents an analytical method framework that considers the effect of plant transpiration relative to the traditional calculation approaches. Specifically, a closed-form solution for one-dimensional steady unsaturated flow considering plant transpiration is incorporated into a representation of effective stress to obtain the changes in matric suction, and effective stress. The representations are used to extend Hooke’s law and Rankine’s earth pressure theory to determine at-rest, active, and passive earth pressures. Subsequently, the analytical method is used in a series of analysis case studies on the influence of root architecture types, transpiration rates, and soil types on earth pressure, to reveal that it can rapidly obtain the earth pressure. Notably, the effect of plant transpiration on earth pressure is significant. Furthermore, it is found that soil types and transpiration rates have a larger influence than root architecture types. Collectively, the research not only reveals the effect of plant on earth pressure for retaining wall, but also provides a theoretical basis for further exploration of the contribution of plants to the stability of retaining wall.

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Section: Analytical Solution Of Matric Suction Considering Transpirat...mentioning

confidence: 99%

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confidence: 99%

Method for efficient calculating earth pressure of retaining wall considering plant transpiration

Zhang,

Hu,

et al. 2023

Sci Rep

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“…Furthermore, the soil is often in an unsaturated state due to the influence of matric suction. The strength properties in unsaturated soils differ significantly from those in saturated soils [4][5][6]. Hence, a series of innovative works have been introduced within the academic community to tackle the characteristics of unsaturated soils [7].…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Three-Dimensional Tunnel Face Considering Linear and Nonlinear Strength in Unsaturated Soil

Yang,

Liao,

Zhu

2024

Applied Sciences

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The shear strength of unsaturated soils exhibits significant nonlinearity, while previous studies often simplified it with linear strength models. The objective of this paper is to investigate the distinctions in the stability of three-dimensional (3D) tunnel faces when using linear and nonlinear strength models. A new 3D rotational failure mechanism and an extended form of the Mohr–Coulomb (M-C) failure criterion were integrated into the kinematically limited analysis (KLA) framework to describe the failure characteristics of tunnel faces. Subsequently, the factor of safety (FS) of the 3D tunnel faces was calculated using the strength reduction method (SRM). In the discussion section, the impacts of nonlinear shear strength, matric suction in the unsaturated soils, and the 3D geometric parameters of the tunnel on the stability of the tunnel face were analyzed. The outcomes indicate that, in unsaturated soil conditions, diverse nonlinear strength calculation models and soil types exert disparate influences on the FS of 3D tunnel faces. The main novelty of this study lies in establishing an effective method for assessing the stability of tunnel faces in unsaturated soils.

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“…The limit analysis method, relying on its rigorous and systematic theorem, has gradually been accepted by scholars and engineers in recent decades [14][15][16][17][18]. The difficulty of the lower-bound analysis exists in the establishment of the statically permissible stress field; for this reason, the construction of the appropriate stress field is generally performed with the help of finite element software.…”

Section: Introductionmentioning

confidence: 99%

Seismic Stability Analysis of Tunnel Faces in Heterogeneous and Anisotropic Soils Using Modified Pseudodynamic Method

2023

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This work assesses the seismic stability of tunnel faces advanced in heterogeneous and anisotropic soils based on the plastic limit theorem. A discretized kinematic velocity field respecting the normal flow rule is generated via a point-to-point discretization technique. The distribution of soil parameters in the depth direction including cohesion, friction angle, and unit weight are considered by four kinds of profiles. The variation in cohesion with shear direction caused by consolidation and sedimentation is considered by including an anisotropy coefficient. The seismic acceleration is represented by the modified pseudodynamic method (MPD) rather than the conventional pseudodynamic method (CPD). Based on the energy equilibrium equation, an upper-bound solution is derived. The accuracy and rationality of the proposed procedure are substantiated by comparing with the solutions obtained by conventional log-spiral mechanism and CPD. A parametric study indicates that nonlinear profiles tend to predict a smaller required face pressure than the constant and linear profiles due to the convexity of nonlinear profiles. The over-consolidated soil is more sensitive to the anisotropy coefficient than normally consolidated soil. Moreover, the adverse effect of horizontal seismic acceleration is much greater than that of vertical acceleration, and the resonance effect is more prone to happen, especially for shallow-buried tunnels.

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Active earth pressure for soils with tension cracks under steady unsaturated flow conditions

Cited by 38 publications

References 29 publications

Method for efficient calculating earth pressure of retaining wall considering plant transpiration

Method for efficient calculating earth pressure of retaining wall considering plant transpiration

Stability Analysis of Three-Dimensional Tunnel Face Considering Linear and Nonlinear Strength in Unsaturated Soil

Seismic Stability Analysis of Tunnel Faces in Heterogeneous and Anisotropic Soils Using Modified Pseudodynamic Method

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