动力荷载作用下孔隙水压力的变化及边坡稳定性的分析

The variation of pore water pressure under dynamic load and the analysis of slope stability

稳定分析是边坡工程质量及安全的重大问题,然而影响边坡稳定的因素有很多,有内因和外因之分,常见的主要内部因素包括坡体的岩性,节理及地层分布以及大地构造应力等情况。主要的外部因素有水,地震及边坡的支护情况等。在过去的近一个世纪的时间里,许多学者对于边坡的稳定从各个方面进行了分析,有的主要考虑内部因素的作用,有的在内部因素的基础上额外的考虑了外部因素作用下的稳定情况。但是显而易见的是,作用于边坡的各种外部因素之间也是相互作用,相互影响的,这对于准确的分析边坡的稳定性是十分必要的,同时孔隙水压力的大小将直接影响坡体有效应力的分布情况。在本文中,重点推导并分析孔隙水压力在地震载荷作用下的变化情况,及其对于边坡稳定情况所产生的影响。

Stability analysis of slope engineering is a major issue related to quality and safety.However,there are many factors,which can be divided into internal and external factors,that affect the stability of slope.The main internal factors include the lithology,joints of the slope,the distribution of strata and tectonic stress and so on.The main external factors include water,earthquake and the slope support,etc.In the past one century,the stability of slope has been analyzed from all aspects by scholars.Some of them mainly considered the internal factors,and some of them have additional consideration in external factors.Obviously,though,the external factors,which influence the slope stability,are interacted.It is necessary for the accuracy of slope stability analysis.At the same time,the pore water pressure has a direct influence on the distribution of the effective stress in the slope.This paper focuses on the derivation and analysis of the variation of pore water pressure under seismic load.And its influence on slope stability.