土工基础

›› 2015, Vol. 29 ›› Issue (2): 83-86.

• 工程实录 • 上一篇    下一篇

顺层岩质高边坡破坏模式分析及稳定性研究

朱 超1,马士举2   

  1. （1.安徽省水利水电勘测设计院，合肥 233000；2. 中铁西安勘察设计研究院有限责任公司，西安 710054）
  • 收稿日期:2014-10-24 出版日期:2015-04-20 发布日期:2015-05-04
  • 作者简介:朱 超（1982-），男，工程师，研究方向为工程勘察、岩土工程设计。

Failure Modes and Stability Evaluations of High Syncline Rock Slopes

ZHU Chao1，MA Shiju2   

  1. (1.Anhui Survey and Design Institute of Water Conservancy and Hydropower, Hefei 233000
    2.China Railway Eryuan Engineering Group Co., Ltd., Xian, 710054)
  • Received:2014-10-24 Online:2015-04-20 Published:2015-05-04

摘要： 针对我国西南地区某高速公路顺层岩质高边坡，通过地质力学分析，确定了高边坡的主要破坏模式为坡顶受拉破坏和沿着顺坡向结构面主滑的拉-剪联合破坏模式；根据高边坡开挖之前的实际稳定状态，对顺坡向结构面的强度参数进行反分析，合理确定了主滑结构面的强度参数；最后选取典型剖面，采用极限平衡法和有限元强度折减法，评估了该高边坡在自然、降雨和地震工况下的整体稳定性状态，在自然工况下该高边坡稳定性安全系数在1.12左右。

关键词: 岩质高边坡, 破坏模式, 极限平衡法, 有限元强度折减法

Abstract: The failure mode of a high syncline rock slope in an expressway construction site in Southwest China was determined to be the combined mode of tension failure at the crest and the slidingshear along the structural plane throughout the analyses. The strength parameters along the main sliding plane are determined from the back analysis of this syncline slope. Both the limit equilibrium and finite element method with strength reduction methods are performed on a typical cross section of this high rock slope. The stability of the typical section under the natural, high precipitation and seismic conditions are analyzed. The factory of safety under the natural condition is 1.12.  

Key words: High Rock Slope, Failure Modes, Limit Equilibrium Methods, Finite Element Method with Strength Reduction Technique