考虑水压效应的基坑边坡稳定性计算分析  

SLOPE STABILITY ANALYSIS FOR FOUNDATION PIT SUBJECTED TO WATER PRESSURE

作　　者：孙强[1] 张晓科[1] 李厚恩[1] 

机构地区：[1]中国科学院工程地质力学重点实验室,北京100029

出　　处：《工程地质学报》2007年第3期403-406,共4页Journal of Engineering Geology

摘　　要：地下水的存在给工程带来了巨大的隐患。如何研究分析地下水对工程的作用是地质工程界的一个重点和难点。本文基于地下水的破坏效应,分析研究了地下水引起的接触面积的变化,并推导了饱水情况下平面滑动的临界角变化公式。A*越小,即λ越小,发生失稳破坏的临界角θ就越小。而地下水p的增加有助于A*的减小,造成了在水压作用下土体更容易发生失稳破坏。Ground water is the key factor that does more harm to the foundation pit project. How to analyze and examine the effect of ground water on the project is a challenging and important subject. This paper, analyzes the change of interface with the variety of ground water by taking into account the destruction effect of ground water. It derives the equation to calculate the critical angel of planar slide under saturated condition. When the area of interface A^＊ and A are smaller, the critical angel of failure θ is smaller. However, the increase of ground water pressure can reduce the area of interface A^＊ , which shows the ground water pressure makes the soil mass is easier to fail.

关 键 词：基坑失稳 地下水压力 临界角 

分 类 号：TU441.6[建筑科学—岩土工程]