铁道标准设计2018，Vol.62Issue(5)：109-115,7.DOI:10.13238/j.issn.1004-2954.201705310001
既有地铁隧道上方基坑开挖特性研究
Research on Characteristics of Foundation Pit Excavation above Existing Subway Tunnel
曹前1
作者信息
- 1. 长沙市轨道交通集团有限公司,长沙 410000
- 折叠
摘要
Abstract
Based on the foundation pit excavation above the existing subway tunnel of Changsha Metro Line 1, numerical simulation of the deformation and internal forces of the tunnel structure caused by foundation pit excavation is conducted with Plaxis 3D finite element software. Reasonable working procedures are put forward accordingly to the above analysis. It is concluded that for this kind of foundation pit,reducing the exposed tunnel length after one-off excavation of the foundation pit plays an important role in decreasing the amount of the tunnel uplift. The deformation patterns of foundation pit and shield section are discussed in detail.关键词
既有地铁隧道/基坑开挖/隆起变形/止水帷幕Key words
Existing subway tunnel/Foundation pit excavation/Uplift deformation/Water-resisting cur-tain分类
建筑与水利引用本文复制引用
曹前..既有地铁隧道上方基坑开挖特性研究[J].铁道标准设计,2018,62(5):109-115,7.
