3D stability of unsaturated soil slopes with tension cracks under steady infiltrations

Earthquake remains the main factor in triggering the slope failures and the rigid gravity retaining wall is an effective technique in guaranteeing the slope safety. In earth pressures estimations, considering simultaneously the three-dimensional (3D) features of backfills, the suction-induced effects and the dynamic characteristics of seismic excitations warrants producing more realistic solutions. In the category of upper bound limit analysis theorem, a modified semi-analytical method for determining the seismic earth pressures of inclined unsaturated backfills is provided. Applicability and reliability of this method is varied through comparisons and the seismic responses of 3D inclined unsaturated backfills are studied. The results indicate that the 3D effect relates closely to the seismic excitations and the SWCC and can hardly be ignored in earth pressure estimations. The 3D effect varies periodically as the seismic wave propagates and is more evident in fine-grain soil slopes but is relatively less obvious in coarse-grain soil slopes.

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“…However, when the intricate soil suction and the ununiformly Semi-analytical approach is a promising way for these conditions. 20,21…”

Section: Upper Bound Theoremmentioning

confidence: 99%

“…However, when the intricate soil suction and the ununiformly distributed seismic inertial forces are considered in the analyses, it is really hard to obtain an analytical solution. Semi‐analytical approach is a promising way for these conditions 20,21 …”

Section: Seismic Earth Pressure Of 3d Unsaturated Backfillsmentioning

confidence: 99%

Estimation of 3D earth pressure with inclined backfill surface considering seismic loads and suction effects

Wang

Gao

et al. 2023

Num Anal Meth Geomechanics

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“…Basing on the results of the studies, using the developed modeling techniques [10][11][12][13][14], the layer-by-layer summation method based on the divergence theorem to calculate the internal dissipation rate [15], it is planned to determine the optimal parameters of the operating devices and establish rational modes of functioning of the technical equipment taking into account physical and mechanical properties of the processed medium (moisture and soil hardness).…”

Section: The Variant Of the New Operating Devicementioning

confidence: 99%

Methodology and results of studying soil moisture after the interaction with the operating devices

et al. 2020

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Operating devices for soil cultivation in arid conditions should not carry the lower layers to the surface of the field, since this leads to the loss of moisture due to its evaporation. Purpose of work is to determine the moisture content in the soil after using new operating devices. There been developed technique of determining the moisture content in the soil after exposure to operating devices by studying the movement of soil layers in the vertical direction and comparing their moisture. The movement of soil in the vertical direction is quantified by a comparative study of the moisture content in the upper and lower layers of the treated formation before and after exposure to operating devices. Using appropriate equipment, there were determined the moisture content in the most susceptible to evaporation surface layer of 0–5 cm and then the average value of the layer-by-layer measurement up to a depth of 25 ÷ 35 cm, depending on the selected operating modes of the operating device.

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“…Multiphase flow through porous, deformable media occurs in a variety of applications in science and engineering 1–4 . In geotechnical engineering, predicting the increase of soil saturation due to rainfall infiltration is key to accurate modeling of landslide triggering 5–12 . In petroleum engineering, the decrease in pore fluid pressure due to hydrocarbon recovery within a reservoir could cause compaction of the rock and subsequent subsidence of the ground surface 13,14 .…”

Section: Introductionmentioning

confidence: 99%

Preconditioners for multiphase poromechanics with strong capillarity

Camargo

White

Castelletto

et al. 2021

Num Anal Meth Geomechanics

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This paper aims to enhance the performance of Newton–Krylov solvers for coupled poromechanical problems with two‐phase flow. In particular, we investigate the impact of capillary pressure on preconditioning strategies. Capillarity complicates the coupling between the solid deformation and fluid pressure degrees of freedom, as well as increases the nonlinearity of the system. Depending on the capillary pressure relation used in the constitutive formulation, the flow equations may exhibit a spectrum of advection‐dominated to diffusion‐dominated behavior. We propose preconditioning approaches that account for this behavior and lead to robust numerical performance within a broad range of regimes.

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3D stability of unsaturated soil slopes with tension cracks under steady infiltrations

Cited by 37 publications

References 56 publications

Estimation of 3D earth pressure with inclined backfill surface considering seismic loads and suction effects

Estimation of 3D earth pressure with inclined backfill surface considering seismic loads and suction effects

Methodology and results of studying soil moisture after the interaction with the operating devices

Preconditioners for multiphase poromechanics with strong capillarity

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