运营地铁隧道上方基坑施工技术研究  

STUDY ON CONSTRUCTION TECHNIQUE OF FOUNDATION PIT ABOVE OPERATING METRO TUNNEL

作　　者：叶耀东[1] 王如路[2] 刘海[2] 

机构地区：[1]同济大学,上海200092 [2]上海地铁运营有限公司,上海200031

出　　处：《建筑技术》2006年第12期921-923,共3页Architecture Technology

摘　　要：采用高压旋喷桩及SMW工法桩加固隧道上方软土地基,可减少基坑土体卸载在时间和空间上的不均衡性引起隧道纵向产生不均匀的变形;运用时空效应理论进行分析,确定一次性卸载量、卸载范围及沿隧道纵向的卸载次序,拟定基坑开挖方案;施工阶段结合监测数据进一步优化、调整开挖次序,使隧道变形曲线趋于缓和。High-pressure rotating jet-grouted piles and SMW constructed piles were used to reinforce the soft ground above the tunnel, which could reduce the uneven longitudinal deformation of the tunnel caused by the unbalanced unloading of the pit soil in space and time. With the help of time-space effect theory, unload- ing volume of one time, unloading range, and unloading orders along the tunnel, were determined and pit excavation plan was prepared. During the construction period, the excavation sequence was further optimized and adjusted according to the on-site monitoring data to lessen the tunnel deformation.

关 键 词：基坑 软土地基 卸载 

分 类 号：TU753.62[建筑科学—建筑技术科学]