Stability analysis of red sandstone bedding slope under rainfall infiltration and dry-wet cycling

ZENG Sheng; LI Zhen-cun; 2; WEI Hui; GUO Xin

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Stability analysis of red sandstone bedding slope under rainfall infiltration and dry-wet cycling

更新时间：2026-06-25

- Stability analysis of red sandstone bedding slope under rainfall infiltration and dry-wet cycling
- Vol. 34, Issue 6, (2013)
- 作者机构：
  
  1. 长沙理工大学交通运输工程学院,长沙,410004
  2. 长沙理工大学公路工程省部共建教育部重点实验室,长沙,410004
- 作者简介：
- 基金信息：
- DOI：
  CLC： U416.1
- Online First：14 June 2013，
  
  Published：2013
- 稿件说明：
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ZENG Sheng, LI Zhen-cun, 2, et al. Stability analysis of red sandstone bedding slope under rainfall infiltration and dry-wet cycling[J]. 2013, 34(6).
DOI：

ZENG Sheng, LI Zhen-cun, 2, et al. Stability analysis of red sandstone bedding slope under rainfall infiltration and dry-wet cycling[J]. 2013, 34(6). DOI：

摘要

针对红砂岩顺层岩质边坡稳定性问题，建立顺层岩质边坡力学模型，对降雨渗流条件下边坡受到的力学作用进行了计算；选取典型结构面，通过室内干湿循环试验，分析了结构面强度参数衰减规律；综合考虑降雨渗流及结构面强度弱化，对降雨渗流及干湿循环综合影响下红砂岩顺层岩质边坡稳定性进行了分析，获得了边坡稳定性衰减变化规律；通过炎汝高速公路边坡稳定性监测对理论计算结果进行了验证。结果表明，边坡受到的水力作用与后缘张拉裂隙充水高度呈正比；干湿循环作用下，结构面黏聚力呈幂指数形式衰减，内摩擦角呈二次函数衰减；边坡稳定性与后缘张拉裂隙充水高度呈线性关系，而与干湿循环呈指数关系，且干湿循环对边坡稳定性影响比后缘裂隙充水高度大；在降雨渗流及干湿循环综合作用下，边坡稳定性系数降低了约66%，较考虑单一影响因素有了大幅度降低；边坡稳定性监测结果与理论计算结果吻合较好，进一步证明了理论计算结果的正确性。

Abstract

According to the stability of red sandstone bedding rock slope

a mechanical model is established; the hydraulic effect on slope under rainfall infiltration is calculated. Selecting a typical structural plane

through dry-wet cycling test

strength attenuation law of structural plane is analyzed. Comprehensive considering the rainfall infiltration and dry-wet cycling

the stability analysis of red sandstone bedding slope is analyzed; and the stability attenuation law is achieved. At last

by slope stability monitoring of Yan-Ru expressway

theoretical calculation results are verified. The results show that the hydraulic action is proportional to the water height in rock crack. Under dry-wet cycling

the cohesion of structural surface decays in the form of power function; and the internal frictional angle decays in the form of quadratic function. The slope stability has linear relationship with water height in rock crack and exponential relationship with dry-wet cycling. The dry-wet cycling has a greater influence on slope stability than that on water height in rock crack. Under the combined action of rainfall infiltration and dry-wet cycling

slope stability coefficient reduces by about 66%. Compared with considering single influence factor

the stability coefficient attenuation range has a great increase. The slope stability monitoring results agree well with theoretical results

the validity of theoretical results is further proved.

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