摘要
基于有限差分软件FLAC3D,探讨了地震作用下坡面形态对土质边坡稳定性与锚杆轴力的影响。研究表明:锚杆能有效改善边坡的抗震性能;凹形坡和平直坡坡面永久水平位移均随高程增大呈先增大后减小再增大的趋势,最大永久水平位移均发生在坡脚附近,而凸形坡坡面永久水平位移随高程增大呈持续增大的趋势;凹、凸和平直坡锚杆轴力变化规律一致,均沿锚杆杆长呈“人”字形曲线分布,即呈中间大两头小分布,在滑动面对应处的锚杆轴力最大;平直坡和凸形坡不同锚杆轴力峰值均随高程增大而逐渐减小,而凹形坡不同锚杆轴力峰值均随高程增大先减小后增大;凹、凸形边坡的锚杆轴力峰值均随坡面曲率半径减小而增大,说明凹、凸边坡坡面曲率半径越小,亦即凹、凸边坡的凹、凸起程度越大,边坡越不稳定。该研究可为相关边坡锚固支护提供参考。
Based on the finite difference software FLAC3D,the influence of slope surface morphology under seismic action on soil slope stability and anchor axial force is discussed.The results show that the bolt can effectively improve the seismic performance of slope.The permanent horizontal displacement of concave slope and straight slope increases first,then decreases and then increases with the increase of elevation.The maximum permanent horizontal displacement occurs near the foot of the slope,while the permanent horizontal displacement of convex slope increases continuously with the increase of elevation.Concave,convex peace straight slope anchor axial force variation law is consistent,all along the anchor length is herringbone glyph curve,namely in the middle,two small head distribution of bolt axial force in sliding face should be the biggest,flat and convex slope different bolt axial force peak decreases gradually with the increase of elevation,and the concave slope different bolt axial force peak increases with height increase with the decrease of the first;The peak values of bolt axial force of concave slope and convex slope increase with the decrease of slope curvature radius,indicating that the smaller the curvature radius of concave slope and convex slope is,that is,the larger the concave and convex slope is,the more unstable the slope is.This study can provide reference for anchorage and support of slope.
作者
罗瑞翔
孙睿祺
徐然
郭海柱
LUO Rui-xiang;SUN Rui-qi;XU Ran;GUO Hai-zhu(Henan Shenma Hydrogen Chemical Co.,Ltd.,Pingdingshan 467000,China;School of Transportation&Environment,Shenzhen Institute of Information Technology,Shenzhen 518172,China)
出处
《河南城建学院学报》
CAS
2022年第6期16-22,共7页
Journal of Henan University of Urban Construction
基金
广东省普通高校特色创新项目(2020KTSCX300)。
关键词
坡面形态
永久水平位移
滑动带
坡面曲率半径
锚杆轴力
slope morphological effect
permanent horizontal displacement
sliding zone
radius of curvature
bolt axial force
