Stability Analysis of an Expansive Soil Slope under Rainfall Using the Thrust Line Method

杨文琦; 周成; 王林; 李红梅

doi:10.13409/j.cnki.jdpme.2018.05.015

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Stability Analysis of an Expansive Soil Slope under Rainfall Using the Thrust Line Method

更新时间：2025-12-11

- Stability Analysis of an Expansive Soil Slope under Rainfall Using the Thrust Line Method
- Vol. 38, Issue 5, Pages: 874-880(2018)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2018.05.015
  CLC： U443
- Published：2018
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[1]杨文琦,周成,王林,李红梅.降雨作用下考虑膨胀推力的膨胀土边坡稳定性分析[J].防灾减灾工程学报,2018,38(05):874-880.

杨文琦, 周成, 王林, et al. Stability Analysis of an Expansive Soil Slope under Rainfall Using the Thrust Line Method[J]. 2018, 38(5): 874-880.
[1]杨文琦,周成,王林,李红梅.降雨作用下考虑膨胀推力的膨胀土边坡稳定性分析[J].防灾减灾工程学报,2018,38(05):874-880. DOI： 10.13409/j.cnki.jdpme.2018.05.015.

杨文琦, 周成, 王林, et al. Stability Analysis of an Expansive Soil Slope under Rainfall Using the Thrust Line Method[J]. 2018, 38(5): 874-880. DOI： 10.13409/j.cnki.jdpme.2018.05.015.

摘要

为研究膨胀力作用下膨胀土边坡的稳定性

通过合理假设

在传统剩余滑坡推力法中引入膨胀力项

得出了适用于膨胀土边坡的滑坡稳定性系数计算公式。基于该公式对某膨胀土坡的离心模型降雨试验进行了模拟和计算

通过计算结果和试验结果的对比验证了该法的可行性;同时分析了膨胀力施加与否、不同裂隙分布位置和深度、不同降雨历时和降雨强度下膨胀土边坡的稳定性

得出了安全系数的变化规律。结果表明

降雨条件下考虑膨胀力时膨胀土边坡的安全系数相对于未考虑膨胀力时大幅下降

符合膨胀土边坡降雨破坏的实际情况;裂隙位于坡中时膨胀土边坡较裂隙位于坡顶时更危险;降雨强度和降雨历时也对膨胀土边坡的稳定性造成了影响

但超过一定程度时这种影响会受到限制。该方法为工程中膨胀土边坡稳定性的计算提供了参考。

Abstract

In order to study the stability of expansive soil slope under the impaction of expansive force

the expansive force is added to the traditional landslide thrust method by reasonable assumptions.The calculation formula for landslide stability coefficient of expansive soil slope is obtained.On the basis of the presented formula

the centrifugal model test of an expansive soil slope under rainfall is simulated and calculated

and the feasibility of the method is verified by the comparison between the calculated results and the test results.At the same time

the influence of the expansion force

distribution position and depth of fissures

rainfall duration and rainfall intensity on the stability of the expansive soil slope is analyzed.The results show that the factor of safety of the expansive soil slope significantly reduces when the expansive force is considered under rainfall conditions.When the fissure is in the middle of the slope

the expansive soil slope is more dangerous than that in the top of the slope.The intensity and the duration of rainfall also affect the stability of the expansive soil slopes

but the impact is limited.The method provides a reference for calculation of the stability of expansive soil slope in engineering.

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