Research on deformation failure mechanism and stability of slope rock mass containing multi-weak interlayers

ZHANG She-rong; TAN Yao-sheng; WANG Chao; WANG Kuan

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Research on deformation failure mechanism and stability of slope rock mass containing multi-weak interlayers

更新时间：2026-06-25

- Research on deformation failure mechanism and stability of slope rock mass containing multi-weak interlayers
- Vol. 35, Issue 6, (2014)
- 作者机构：
  
  天津大学水利工程仿真与安全国家重点实验室,天津,300072
- 作者简介：
- 基金信息：
- DOI：
  CLC： P642.22
- Online First：20 June 2014，
  
  Published：2014
- 稿件说明：
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ZHANG She-rong, TAN Yao-sheng, WANG Chao, et al. Research on deformation failure mechanism and stability of slope rock mass containing multi-weak interlayers[J]. 2014, 35(6).
DOI：

ZHANG She-rong, TAN Yao-sheng, WANG Chao, et al. Research on deformation failure mechanism and stability of slope rock mass containing multi-weak interlayers[J]. 2014, 35(6). DOI：

摘要

以大量的实际工程为基础，基于Sarma极限平衡法和有限元强度折减法探讨层状岩质边坡在不同岩层倾角θ、边坡坡角β、结构面间距h条件下的安全系数与破坏面位置的变化规律，揭示复杂多层软弱夹层边坡岩体的破坏机制及稳定性特征。结果表明：不同θ条件下边坡岩体失稳机制和破坏面位置不同，随着θ的增大，破坏机制表现为滑移破坏→滑劈破坏→崩塌破坏→倾倒破坏→滑移破坏；当β、h一定时，直立层状边坡的稳定性略大于水平层状边坡，反倾向边坡的稳定性明显大于顺层边坡；β直接影响边坡岩体破坏特征，当β由30°增大至60°时，顺层边坡的安全系数约降低53%；反倾向层状边坡的安全系数约降低40%；h对边坡岩体破坏机制的影响较小，但对稳定性的影响较大，建议工程实践中加强密集结构面岩质边坡的监测和加固工作。

Abstract

Based on many actual projects

through investigating slope rock mass containing multi-weak interlayers with different rock dip angles θ

slope angles β and structural face intervals h

safety factors and the location of critical failure surfaces are calculated by the method of Sarma and strength reduction method. Deformation failure mechanism of slope rock mass containing multi-weak interlayers is studied. The result shows: ①Failure mechanism and failure surface of layered rock slope are greatly different under the condition of different θ

it shows a progress of sliding failure

slip split failure

collapse

toppling failure

sliding failure when θ is increasing. ②As β and h are fixed

the stability of vertical layered slope is slightly larger than that of horizontal layered slope; and anti-dip layered rock slope is obviously larger than bedding rock slope. ③β affects the slope instability and damage features directly

and safety factor of bedding rock slope is reduced by nearly 53% as well as 40% reduction for the safe factor of anti-dip stratified rock. ④Effects of h are minor on slope deformation and failure mechanism but significant on stability

strengthening the monitor and reinforcing dense structure surface rock slope in practice are suggested.

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