土工基础

›› 2016, Vol. 30 ›› Issue (5): 544-547.

• 工程实录 • 上一篇    下一篇

西南某水电站半坡滑坡抗剪强度参数的确定

孙广辉，许 忆，毛学师   

  1. （浙江华东建设工程有限公司，杭州 310014）
  • 收稿日期:2016-06-14 修回日期:2016-07-05 出版日期:2016-10-20 发布日期:2016-10-31
  • 作者简介:孙广辉(1984-)，男，工程师，研究方向为水电工程勘察设计。

Shear Strength Parameters Determination of the Banpo Landslide at a Hydropower Station Site

SUN Guanghui, XU Yi, MAO Xueshi
   

  1. (Zhejiang Huadong Construction Engineering Co., Ltd., Hangzhou 310014)
  • Received:2016-06-14 Revised:2016-07-05 Online:2016-10-20 Published:2016-10-31

摘要： 以半坡滑坡为研究对象，通过该滑坡的工程地质条件和成因机制分析，确定其在地质历史时期曾发生两次失稳破坏。选取具有代表性的滑坡纵剖面，恢复原始地形，根据极限平衡原理，采用slide软件对滑带土的抗剪强度参数进行反演分析。同时，结合室内土工试验，类比周边临近相似工程，综合确定滑带土的抗剪强度参数，计算滑坡在各种工况下的稳定性，可为同类工程抗剪强度参数的确定提供参考。

关键词: 滑坡, 成因机制, 抗剪强度, 极限平衡法, 反演分析

Abstract: This paper presents a case history of Banpo landslide analysis for a hydropower station site in Southwest China. The subsurface conditions and the landslide reconnaissance indicate that there two historical slides can be identified at the site. Starting from the laboratory test results, the subsurface soil shear strength parameters of the slided zone were determined by global stability analysis with limit equilibrium method by Slide software on the sliding profiles representing the original topography. Based on the back analyzed soil shear strength parameters, the global stability of the current topography was analyzed under various load combinations and conditions.

Key words: Landslide, Hazard Formation Mechanism, Shear Strength Parameters, Limit Equilibrium Method, Back Analysis