盾构穿越轨道交通线路的施工技术及措施

该文结合上海世博园区某隧道工程,介绍了盾构在穿越轨道交通4号线地下区间施工时所采取的施工技术和措施。在充分了解了周边环境、相邻构筑物、管线、盾构机、特定的水文地质条件以后,把盾构穿越分为3个阶段,在试推进阶段收集盾构推进参数,在穿越阶段控制盾构施工参数,在穿越后阶段根据沉降监测情况进行后期补压浆。同时考虑好穿越轨道交通运营线时在不良地层中推进的技术措施,以及做好隧道轴线、地面沉降变形和临近构筑物管线的监测工作,做好信息化施工管理,做到数据及时采集、及时分析、及时指导施工。并做好应急预案。其成果可供同行借鉴。

Discussion on Construction Technology and Measures of Shield Crossing Rail Traffic Line

The article introduces the construction technology and measures taken for the shield to cross the underground area of Rail Traffic Line 4 during the construction of Shanghai Expo Park Tunnel Project.Fully understanding the surrounding environment,adjacent structures,pipelines,shield machines and specific hydrogeological conditions,the shield crossing is divided into three stages of collecting the shield driving parameters in the test driving stage,controlling the shield construction parameters in the crossing stage and carrying out the late filling grouting in the stage after crossing according to the settlement monitor.It is also to consider the driving technical measures for crossing the metro lines in the poor stratums,do the monitor work well of tunnel axis,ground settlement deformation and adjacent structure pipelines,do the informatization construction management well,and make the data collect in time,analyze in time and guide construction in time,and lay down the emergency plans.The results can be referred for the similar projects.