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。
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 lhe natural condition is 1.12.
出处
《土工基础》
2015年第2期83-85,共3页
Soil Engineering and Foundation
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
High Rock Slope
Failure Modes
Limit Equilibrium Methods
Finite Element Method with Strength Reduction Technique
