土质及软岩边坡地震稳定性影响因素分析  

Analysis on Risk Factors for Seismic Stability of Soil and Soft Rock Slope

作　　者：许江波[1] 郑颖人[2,3] 叶海林[2,4] 

机构地区：[1]中科院地质与地球物理研究所,北京100029 [2]后勤工程学院建筑工程系,重庆400041 [3]重庆市地质灾害防治工程技术研究中心,重庆400041 [4]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《地下空间与工程学报》2011年第6期1233-1240,共8页Chinese Journal of Underground Space and Engineering

摘　　要：汶川地震后,拉剪破裂面已经成为岩土工程界公认的边坡破坏面,传统的剪切破坏面不符合动力边坡破坏的实际情况,文章修正了传统动力时程分析法,提出一种全新的动力边坡稳定性判断方法。此种方法在理论和实际中都有很大优势,为了保证此种方法计算结果的唯一性和准确性,则必须保证判断动力边坡的判据不受其他因素的影响。为此文章通过采用FLAC软件模拟土质及软岩边坡,计算分析弹性模量、时间间隔和局部阻尼系数的选取对土质及软岩边坡动力稳定性安全系数的影响,以此来验证此种动力边坡稳定性判断方法是否可行。After Wenchuan earthquake,the tensile-shear failure surface has become a recognized slope failure surface in geotechnical world,the traditional shear failure surface does not meet the actual situation of slope failure and this article revises the traditional dynamic time-history analysis,and advances a new method to judge the slope stability.This method has a significant advantage in theory and practice;in order to ensure the uniqueness and accuracy of the results,we must make the criteria uninfluenced by other factors.So this article simulates the seismic slope by using FLAC software,and analyzes the influence of elastic modulus,time intervals and the selection of local damping on the stability safety factor of seismic slop to verify the correctness of the method as a feasible way to judge slope stability.

关 键 词：土质及软岩边坡稳定性 FLAC 弹性模量 时间间隔 局部阻尼系数 

分 类 号：TU443[建筑科学—岩土工程]