基坑开挖引起下方隧道的变形控制  

Control Measures of Tunnel Displacement by Over-excavation Unloading

作　　者：李志高[1] 刘国彬[2] 曾远[2] 吴小将[2] 

机构地区：[1]福建工程学院土木工程系,福州350007 [2]同济大学地下建筑与工程系,上海200092

出　　处：《地下空间与工程学报》2006年第3期430-433,共4页Chinese Journal of Underground Space and Engineering

摘　　要：在上海东方路下立交工程中,进行大面积深基坑开挖期间,严格控制地铁隧道由于上方基坑开挖卸载引起的变形量,保证下方地铁二号线的正常运营,施工难度极大。作者从施工工艺上分析了开挖卸载对下卧隧道的影响,提出了减小隧道变形的施工控制措施,采用了考虑时空效应的施工方法进行开挖,取得了很大的成功。During the large acreage excavation in the project of Dong-fang Road Underpass in Shanghai, deformation of metro tunnel resulting from over-excavation is strictly controlled to assure the normal run and the construction is quite difficult. From the point of view of construction technology, this paper analyzes the effect of excavation, proposes some measures to minimize the tunnel＇s deformations and the construction method with considering time-space effect is adopted to excavation. The results indicate that the construction is successful.

关 键 词：开挖卸荷 隧道 变形控制 

分 类 号：TU473.2[建筑科学—结构工程]