Three-Dimensional Numerical Investigation on the Seepage Field and Stability of Soil Slope Subjected to Snowmelt Infiltration

Cong, Shengyi; Tang, Liang; Ling, Xianzhang; Xing, Wenqiang; Li, Geng; Li, Xinyu; Li, Guoyu; Li, Hui

doi:10.3390/w13192729

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…Seepage analysis holds crucial significance in civil and hydraulic engineering. The variations of pore pressure in soil can significantly affect the stability of engineering structures, such as slopes [1,2], tunnels [3], and earth-rock dams [4], etc., which are prone to collapse due to the rapid increase of pore water pressure during rainfall or floods. To mitigate the pore water pressure of soil and enhance the safety and stability of engineering, drainage pipes are often installed into embankments, underground structures, and slope engineering [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Seepage Element Containing Drainage Pipe

Xia,

Xu,

et al. 2024

Water

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Drainage pipes are often positioned downstream of embankments to mitigate pore pressure, thereby reducing the risk of dam failure. Considering that the size of drainage pipes is much smaller than that of embankment dams, directly discretizing the drainage pipes will generate a huge number of elements. Therefore, this paper proposes a seepage element containing drainage pipes. In this element, the permeability of the drainage pipe is taken as the third type of permeable conductivity condition, and it is considered in the energy functional. The governing equations for the steady-state and the transient seepage element containing drainage pipe are derived using the variational principle, and the infiltration matrix, equivalent nodal seepage array, and water storage matrix of the seepage element containing drainage pipe are obtained. In conjunction with the user-defined element module UEL of ABAQUS 2016 software, the established seepage element containing drainage pipe is programmed. The accuracy and efficiency of the proposed seepage element containing drainage pipe are verified through seepage field simulations of three examples. Finally, the influence of the permeable conductivity of drainage pipes on the pressure reduction effect is investigated, providing a reference for the layout of drainage pipes in embankment defense systems.

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Section: Introductionmentioning

confidence: 99%

An Efficient Seepage Element Containing Drainage Pipe

Xia,

Xu,

et al. 2024

Water

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“…It is of great importance for understanding the stability of soil slopes in cold winter regions. Using a three-dimensional numerical model, Cong et al (2021) [3] demonstrated that the shallow failure of a frozen soil slope was related to frequent snow melting in ltration, which provides useful guidance for slope design in seasonal frozen areas. A study conducted by Zhang et al in 2021 [4] examined the in uence of frozen ponding on landslide stability in loess landslides belts, concluding that freeze-thaw action and differences between the underlying surface characteristics of the side slopes were signi cant factors in the development of landslides.…”

Section: Introductionmentioning

confidence: 99%

The stability issue of fractured rock mass slope under the influences of freeze-thaw cycle

Liu

Yang

et al. 2023

Preprint

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With the continuous promotion of the national western development strategy, as well as the revitalization of the Northeast old industrial base, many water conservation, transportation and mining projects are planned more frequently in permafrost regions at high altitudes and latitudes Rather than conventional geological areas. Because of the periodic changes in air temperature, the properties of geotechnical materials have changed greatly in permafrost regions, resulting in many new geotechnical engineering challenges. It is particularly difficult to evaluate the stability of open pit rock slopes and cutting rock slopes formed by excavation using conventional methods. Based on the theme that the essence of slope stability of fractured rock mass in cold region is the thermo-hydro-mechanical(THM) coupling affected by freeze-thaw cycle, this paper examines the stability of frozen rock slopes from the perspective of the failure mechanisms, types of failures, mechanical properties of low-temperature rock masses. On the base of the study of stability, this paper proposed the classification of frozen rock slopes and a time-varying evaluation method for the stability of frozen rock slope, which takes into account freeze-thaw damage of rock mass, rainfall infiltration in summer and crack propagation in winter, and the numerical simulation method is used for preliminary verification. This paper can deepen scholars' understanding of rock fracture slope in cold area and promote related research work.

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“…The experimental results demonstrated the influence of the ambient temperature and the number of freeze thaw cycles on its temperature field and mechanical properties. Moreover, its performance primarily changed after the first two-three cycles [14][15][16]. The top subsidence and lateral displacement of the retaining wall increased along with the number of freeze thaw cycles [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Performance of Prestressed Anchor Cables Supporting Deep Foundation Pit of a Subway Station during Spring Thaw

2022

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Based on the deep foundation pit for a subway station in Changchun (China), a 3D numerical model of water–heat coupling in a prestressed pile anchor system was established to determine its performance in freezing and thawing seasons in alpine areas. Its reliability was confirmed using field monitoring data on the prestressed anchor cables, which demonstrated changes in surface subsidence, anchor cable axial force, and pile horizontal displacement during spring thaw. The results demonstrated different degrees of elevation of the ground surface at the beginning of the spring thaw depending on whether the ground surface was at 2, 5, or 8 m from the pit excavation surface. Moreover, they demonstrated the occurrence of melting and surface subsidence when the temperature rises above 0°C, and that the axial force of the anchor cables fluctuates at the beginning of spring thaw but stabilizes in its middle and late stages. The phenomenon of pile horizontal displacement during the spring thaw could be roughly divided into three stages, with the second stage resulting in the most significant displacement. These results can provide certain reference for deep foundation pit projects in alpine areas.

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Three-Dimensional Numerical Investigation on the Seepage Field and Stability of Soil Slope Subjected to Snowmelt Infiltration

Cited by 6 publications

References 36 publications

An Efficient Seepage Element Containing Drainage Pipe

An Efficient Seepage Element Containing Drainage Pipe

The stability issue of fractured rock mass slope under the influences of freeze-thaw cycle

Performance of Prestressed Anchor Cables Supporting Deep Foundation Pit of a Subway Station during Spring Thaw

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