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. 2024 May 22;14(1):11662.
doi: 10.1038/s41598-024-62387-3.

Slope stability considering multi-fissure seepage under rainfall conditions

Jianqing Jia  1 , Chengxin Mao  2 , Victor O Tenorio  3
Affiliations

Slope stability considering multi-fissure seepage under rainfall conditions

Jianqing Jia et al. Sci Rep. .

Abstract

Fissures form the channel for rainwater infiltration, which accelerate the infiltration of rainwater into slope bodies, hence its important impact on the seepage field and stability of the slope. In this paper, taking one landslide of Liang-Wan freeway as the research object, firstly, the equivalent permeability coefficient method is used to homogenize the fissured soil. Then considering the boundary conditions of rainfall infiltration and groundwater level, a fluid-structure coupling model is established based on saturated-unsaturated seepage theory, and evolution characteristics of seepage, displacement and stress of the slope are studied. Based on these, the slope stability coefficient is determined. The results show that the rising rate of pore water pressure and volume water content of topsoil increases when multi-fissure seepage is considered, and the pore water velocity is larger in the local seepage range of fissures. With the increase of buried depth, the closer to groundwater level, the influence of multi-fissure seepage gradually weakens. The theoretical calculation results of slope displacement are more consistent with the field monitoring results. With the increase of rainfall time, the stability coefficient of slope decreases gradually, and the rate and range of decrease are greater.

Keywords: Multi-fissure; Rainfall infiltration; Seepage; Strength reduction.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
Monitoring points.
Figure 2
Figure 2
Deformations of monitoring points.
Figure 3
Figure 3
Calculation model.
Figure 4
Figure 4
Characteristic curves of water and soil.
Figure 5
Figure 5
Rainfall amplitude curve.
Figure 6
Figure 6
Mises stress nephogram.
Figure 7
Figure 7
Mises stress variation curve.
Figure 8
Figure 8
Plastic strain nephogram.
Figure 9
Figure 9
Displacement comparison curves.
Figure 10
Figure 10
Soil pore pressure.
Figure 11
Figure 11
Soil pore pressure changing with buried depth.
Figure 12
Figure 12
Flow velocity nephogram.
Figure 13
Figure 13
Soil volume moisture content.
Figure 14
Figure 14
Stability coefficient of the slope.
See this image and copyright information in PMC

References

    1. Dong JB, Ju Y. Quantitative characterization of single-phase flow through rough-walled fractures with variable apertures. Geomech. Geophys. Geo-energy Geo-resour. 2020;6(3):42–56. doi: 10.1007/s40948-020-00166-w. - DOI
    1. Brain B. Characterizing flow and transport in fractured geological media: A review. Adv. Water Resour. 2002;25(8):3861–3884.
    1. Zhou Z, Zhang JM, Ning FL, Luo Y, Wang JL. Temporal and spatial characteristics of moisture migration and instability mechanism of cracked soil slope under rainfall infiltration. J. Traffic Trans. Eng. 2020;20(4):107–119.
    1. Lora M, Camporese M, Troch PA, Salandin P. Rainfall-triggered shallow landslides: infiltration dynamics in a physical hill slope model. Hydrol. Proc. 2016;30(18):3239–3251. doi: 10.1002/hyp.10829. - DOI
    1. Zeng L, Liu J, Shi ZN. Effect of colluvial soil slope fracture's anisotropy characteristics on rainwater infiltration process. J. Traffic Trans. Eng. 2018;18(4):34–43.