Analysis of the Formation Mechanism of Rainfall-induced Residual Soil Landslide

杜光波; 倪万魁

doi:10.13409/j.cnki.jdpme.2016.04.009

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Analysis of the Formation Mechanism of Rainfall-induced Residual Soil Landslide

更新时间：2025-12-11

- Analysis of the Formation Mechanism of Rainfall-induced Residual Soil Landslide
- Vol. 36, Issue 4, Pages: 565-571(2016)
- 作者机构：
- 作者简介：
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- DOI：10.13409/j.cnki.jdpme.2016.04.009
  CLC： 642.22
- Published：2016
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[1]杜光波,倪万魁.降雨诱发型残坡积土滑坡形成机理分析[J].防灾减灾工程学报,2016,36(04):565-571.

杜光波, 倪万魁. Analysis of the Formation Mechanism of Rainfall-induced Residual Soil Landslide[J]. 2016, 36(4): 565-571.
[1]杜光波,倪万魁.降雨诱发型残坡积土滑坡形成机理分析[J].防灾减灾工程学报,2016,36(04):565-571. DOI： 10.13409/j.cnki.jdpme.2016.04.009.

杜光波, 倪万魁. Analysis of the Formation Mechanism of Rainfall-induced Residual Soil Landslide[J]. 2016, 36(4): 565-571. DOI： 10.13409/j.cnki.jdpme.2016.04.009.

摘要

以马家村滑坡为例

用有限元方法分析了降雨入渗条件下残坡积土斜坡的暂态非饱和渗流场

用极限平衡方法分析了残坡积土斜坡的渗流稳定性。分析了斜坡结构、临空面、降雨对斜坡变形与稳定性的影响

分析了降雨诱发残坡积土滑坡的过程。降雨诱发残坡积土滑坡的机理为:降雨入渗使残坡积土斜坡中形成软弱带;坡脚开挖使斜坡坡面出现拉张裂隙;降雨使坡面裂隙中充满水

导致斜坡土体饱和

抗剪强度降低

同时产生动水压力

不利于斜坡的稳定;当斜坡的下滑力大于抗滑力时发生滑动。

Abstract

With Majiacun landslide as an example

finite element method is employed to analyze the transient unsaturated seepage field existing in the residual slope deposit slope under rainfall infiltration and limit equilibrium technique is employed to analyze the seepage stability in this deposit slope.It analyzes the slope structure

free face

effects of rainfall on slope deformation and stabilization

as well as the process of predicting rainfall-induced landslides in residual soil slope.It is believed that the mechanism of rainfall-induced residual slope deposit landslide is:rainfall infiltration creates a weak layer in the residual slope deposit slope;toe excavation produces tensile cracks in the slope face;rainfall fills the slope cracks with water

causes slope soil saturation

reduces the shear strength

and generates hydrodynamic pressure

forms negative effect on the slope stabilization;when the slope sliding force is stronger than anti-slide force

the slope slides.

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Keywords

references

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