摘要
采用强度折减法计算得到的剪应变率表征边坡滑动面位置,在边坡面上设置控制点形成控制线,并找出控制线上的最大剪应变率对应的点,然后连接成滑动面,利用Fish语言编制程序量化滑动面;分析各个参数对于滑动面位置的影响,表明:强度折减法剪应变率滑动面位置与极限平衡法确定的滑动面位置基本一致,验证了该方法的正确性。随着黏结力的增大,边坡由浅层滑动转变为深层滑动,滑动面越来越缓,滑体的体积逐渐增大。随着内摩擦角的增大,边坡由深层滑动转变为浅层滑动,滑动面上缘越来越靠近坡顶。安全系数和滑动面受到抗拉强度的影响较小。
The location of slip surface is featured by the shear strain rate obtained by the shear strength reduction method.The controlling points are set on the slope surface to form the controlling line,then the points with the maximum shear strain rate along the controlling lines are found and connected to form the slip surface.The data of the slip surface is obtained by the FISH program to quantitate the slip surface.The influence of each parameter on the slip surface is analyzed,showing that the locations of slip surface obtained from shear strain rate by the strength reduction method and the limit equilibrium method are basically the same,which validates the correctness of the proposed method.With the increase of cohesion,the type of slip changes from shallow slip to deep one,and the slope of slip surface becomes less steeper and the slip volume becomes larger.With the increase of internal friction angle,the type of slip changes from deep slip to shallow one,then the slip surface becomes steeper and the upper vertex of slip surface comes closer to the top of slope.The tensile strength has little impact on the factor of safety and the slip surface of slope.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2013年第S1期52-56,共5页
Chinese Journal of Geotechnical Engineering
基金
高等学校博士学科点专项科研基金课题(20120162120014)
国土资源部丘陵山地地质灾害防治重点实验室开放基金项目(FJKLGP2012K005)
关键词
边坡
剪应变
滑动面
参数分析
强度折减
slope
shear strain
slip surface
parametric analysis
strength reduction
