路堑边坡开挖稳定性及加固处治机理宏细观分析  

Micro-macro Analysis of Excavation Stability of Cutting Slope and the Mechanism of Reinforcement Treatment

作　　者：严琼 成子桥 吴顺川 吴忠广[4] YAN Qiong;CHENG Ziqiao;WU Shunchuan;WU Zhongguang(POWERCHINA Roadbridge Group Co.,Ltd.,Beijing 100048,China;Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;The Research Center for Standards and Metrology,China Academy of Transportation Sciences,Beijing 100029,China)

机构地区：[1]中电建路桥集团有限公司,北京100048 [2]昆明理工大学国土资源工程学院,昆明650093 [3]北京科技大学土木与资源工程学院,北京100083 [4]交通运输部科学研究院标准与计量研究中心,北京100029

出　　处：《路基工程》2020年第3期6-11,共6页Subgrade Engineering

基　　金：国家重点研发计划专项资助项目(C-YF-2017-08-05-3003)。

摘　　要：以广东省江门市迎宾西路路堑边坡开挖及处治工程为背景,采用宏细观相结合的方法对边坡开挖及锚索加固处治机理进行分析。结果表明:①边坡开挖塑性变形区位移与接触力链发展方向显著相关,呈现沿坡面方向的链状发展规律;②边坡稳定性与坡体应力状况及局部区域应力发展变化密切相关。锚索加固的处治方案,能有效消除边坡体剪应变率贯通的剪切滑移面,边坡稳定性明显提高。The cutting slope along West Yingbin Road,Jiangmen City,Guangdong Province and its treatment engineering were taken as the background herein and,by means of micro-macro analysis,the excavation of slope and the treatment mechanism of anchor cable reinforcement were studied.The results show that,①the displacement of plastic deformation zone in slope excavation is significantly correlated with the development direction of contact force chain,presenting a chain development law towards the slope surface;②the slope stability closely relates to the stress condition of slope and the stress development and change in local area.The scheme of anchor cable reinforcement may eliminate the shear slip plane at shear strain rate in the slope,thus significantly improve the stability.

关 键 词：路堑边坡 开挖 稳定性 锚索加固处治 宏细观分析 

分 类 号：U416.13[交通运输工程—道路与铁道工程]