Stability Analysis and Control Measures of Landslide under Earthquake

Abstract

Abstract: The strength reduction FEM method based on the quasi-static method and the simplified Bishop method are selected to analyze the stability of a landslide under earthquake in the background of the landslide of Tiantuo to Nujiang rive section in Sichuan-Tibet Road． The calculation indicates that the landslide under earthquake is in an unstable state and regulation project should be taken in time． Advisable regulation schemes of the landslide are put forward． The results indicate that the safety coefficients after the regulation are greater than design safety coefficients． And the achievements are proceeded to provide evidences for the stability analysis in earthquake as well as the design of the landslide regulation schemes of the similar landslide．

Key words: earthquake function, landslide, stability analysis, pseudo-static method, strength reduction method; safety coefficients

摘要： 以川藏公路田妥—怒江段一滑坡为研究背景，采用拟静力法的有限元强度折减法和简化Bishop 法对滑坡地震作用下的稳定性进行了计算分析。通过分析得到滑坡整治前在地震作用下处于滑动状态，应及时对该段滑坡进行整治，提出了合理的整治方案并进行了安全性评价。结果表明: 整治后滑坡在地震作用下的安全系数大于设计安全系数。研究成果为类似滑坡在地震作用下的稳定性分析和整治工程设计提供了依据。

关键词: 地震作用, 滑坡, 稳定性分析, 拟静力法, 强度折减法, 安全系数

CLC Number:

U416.1⁺4

GAO Feng，LI Jun. Stability Analysis and Control Measures of Landslide under Earthquake[J]. Journal of Chongqing Jiaotong University(Natural Science), 2011, 30(1): 64-68.

高峰，李俊. 地震作用下滑坡的稳定性分析及治理措施[J]. 重庆交通大学学报（自然科学版）, 2011, 30(1): 64-68.

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