考虑初始应力场的强度折减有限元法高边坡稳定分析  

Analysis of High Slope Stability by Strength Reduction FEM Considering Initial Stress Field

作　　者：严新军[1] 欧阳君[1] 徐千军[1,2] 宫经伟[1] 侍克斌[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水力发电》2010年第5期24-26,共3页Water Power

基　　金：新疆高校科研计划青年教师启动基金项目(XJEDU2008S27);清华大学水沙科学与水利水电工程国家重点实验室开放基金项目(sklhse-2008-D-01);新疆水利水电工程重点学科基金资助项目(XJZDXK-2002-10-05)

摘　　要：针对高边坡形成和开挖的特点,采用分层加载法模拟其初始应力场的形成过程,并用移除单元法模拟先期岩层开挖过程。运用温控参数强度折减有限元法计算高边坡在渗流、地震等荷载作用下,给定岩体有、无初始应力的边坡稳定安全系数。从计算结果看,考虑初始应力作用情况下的安全系数小于不考虑初始应力的安全系数,且二者塑性破坏发展过程有明显差异,因而在用强度折减有限元法分析高边坡稳定时考虑岩体初始应力是必要的。A model with lamination loaded method for simulating the initial stress field and removing elements method for simulating early excavation by was used to analyze the stability of high slope.The safety factor of slope was calculated by temperature-driving strength reduction FEM under the conditions of with or without initial stress field after considering the seepage and seismic loads.The results show that the safety factor after considering initial stress field is lower,and the development of plastic failure is significantly different with the situation without considering initial stress field.It is necessary to consider initial stress field of rock when using strength reduction FEM for slope stability analysis.

关 键 词：初始应力场 高边坡 强度折减有限元法 稳定性分析 

分 类 号：TU457[建筑科学—岩土工程] O242.21[建筑科学—土工工程]