高路堑边坡开挖稳定性与变形在线安全监测研究  

Study on Online Safety Monitoring of Excavation Stability and Deformation of High Cutting Slope

作　　者：程咏春 郭铁春 仇成龙 CHENG Yongchun;GUO Tiechun;QIU Chenglong(Road&Bridge International Co.,Ltd.,Beijing 221116,China)

机构地区：[1]中交路桥建设有限公司

出　　处：《路基工程》2019年第5期141-144,155,共5页Subgrade Engineering

摘　　要：以贵隆高速公路工程为背景,基于数值分析软件,对路域内一典型高路堑边坡的开挖过程进行了稳定性及位移分析,得到边坡开挖过程中安全系数、破坏模式以及地表位移的变化过程,并进行了高路堑边坡开挖过程中地表位移计算公式的理论推导,给出计算公式。同时,基于边坡在线安全监测系统对边坡地表位移、深部位移以及降雨量进行监测,并建立完整的边坡群监测系统和预警平台,实现了同一平台管理。研究结果表明:边坡开挖过程中,边坡安全系数及其对应破坏模式随着开挖进度不断发生变化,中部台阶设置有利于开挖边坡的整体稳定;边坡位移有限元分析结果与实际监测数据相符,表明边坡处于稳定状态。Based on Guigang—Long an Expressway,the excavation stability and displacement of a typical high cutting slope in the road area were analyzed with the numerical analysis software and the safety factor,failure mode and surface displacement during the excavation of the slope were obtained.The theoretical deduction of the formula for calculating the surface displacement during the excavation of high cutting slope was carried out and the formula was also given.At the same time,based on the slope online safety monitoring system,the slope surface displacement,deep displacement and rainfall were monitored and a complete slope group monitoring system and early warning platform were established to achieve the same platform management.The results show that the slope safety factor and corresponding failure mode change with the excavation stages during the excavation of the slope and the setting of middle step is beneficial to the overall stability of the excavated slope;the finite element analysis results of the slope displacement are consistent with the actual monitoring data,indicating that the slope is in a stable state.

关 键 词：高路堑边坡 安全监测 地表位移 深部位移 降雨量 动态监测 

分 类 号：U416.1[交通运输工程—道路与铁道工程]