施工巷道入口处明槽边坡稳定性三维分析  

Three dimensional analysis of the stability of open channel slope at the entrance of underground tunnel

作　　者：范晓强 孙健 李赛 FAN Xiaoqiang;SUN Jian;LI Sai(School of Science, Qingdao University of Technology, Qingdao 266525, China;CNPC East China Design Institute Co., Ltd., Qingdao 266071, China)

机构地区：[1]青岛理工大学理学院,青岛266525 [2]中石油华东设计院有限公司,青岛266071

出　　处：《青岛理工大学学报》2021年第5期20-26,34,共8页Journal of Qingdao University of Technology

摘　　要：基于3DEC数值模拟软件,对某地下工程明槽段施工巷道入口处三侧的边坡稳定性进行了加支护与不加支护三维分析。结果表明:在不加支护的情况下,二级边坡坡面位移、应力以及剪应变增量均较大,属于最危险区域;随着开挖的进行,危险区域逐渐向一级边坡坡顶位置转移,因此在不同施工期应当对不同的危险位置进行重点防护;添加支护后,位移明显改善,应力及剪应变增量也显著改善。Based on 3DEC numerical simulation software,a three-dimensional analysis of slope stability of three sides at the entrance of a tunnel in an open channel section of an underground engineering project is carried out.The results show that:without support,the displacement,stress and shear strain increment of the slope surface of the second grade slope are large,which make it the most dangerous area;with the progress of excavation,the dangerous area is gradually transferred to the top of the first grade slope,so different dangerous positions should be protected in different construction periods;after support is added,the displacement is obviously improved,and the stress and shear strain increment is also significantly improved.

关 键 词：数值模拟 边坡稳定 支护 三维分析 

分 类 号：TU941[建筑科学—建筑技术科学]