漳永高速公路高边坡地震动力响应及稳定性分析  

Seismic Dynamic Response and Stability Analysis for the High Slope of Zhangzhou—Yongan Expressway

作　　者：邓涛[1] 林翔[1] 柳志鹏[1] 李自豪[1] 

机构地区：[1]福州大学土木工程学院,福州350116

出　　处：《路基工程》2016年第6期45-49,共5页Subgrade Engineering

摘　　要：以福建漳州—永安高速公路某含断层的锚框支护边坡工程为依托,运用FLAC3D建立数值模型,采用强度折减法分别对该边坡的静力和动力稳定性进行了详细分析。在烈度为7度的地震波激励下,坡内和坡面各测点处加速度峰值放大系数均呈现出明显的高程效应,且坡顶处具有明显的鞭梢效应;锚索轴力也较静力时明显增大,且在潜在滑移面处达到最大;通过动强度折减法和失稳判据综合判断,其动安全系数为1.68。Based on the anchor-frame slope engineering with fault in Fujian Zhangzhou--Yongan Expressway, degree 7, the peak acceleration amplification coefficients inside and upon the slope always increased with the slope elevation, and the whiplash effect on slope top was observed. The axial force of cable also increased significantly compared to its static condition, and the maximum force appeared on the potential slip plane. The stability analysis based on dynamic strength reduction method and unstable criteria showed that the safety factor of slope reached up to 1.68.

关 键 词：边坡工程 锚框支护 地震动力响应 数值模拟 

分 类 号：U416.14[交通运输工程—道路与铁道工程]