填海区运营地铁上方深基坑施工技术研究

Study on Construction Technology of Deep Foundation Pit Above Operating Subway in Reclamation Area

深圳市双界河水廊道工程在多条运行的地铁线路上方施工,由此产生的深基坑开挖以及地铁保护面临更多、更复杂的技术难题。通过有限元分析方法分析不同施工方式对地铁隧道变形影响。结合有限元分析结果,采用门式抗浮结构和地基注浆加固相结合的方式进行施工,同时辅以相应抗浮措施减小运营地铁线路上浮变形,确保地铁运行安全及项目的顺利施工。

The Shuangjie River Corridor Project in Shenzhen is constructed above several operating subway lines,as a result,the deep foundation pit excavation and subway protection face more and more complex technical problems.The influence of different construction methods on the deformation of subway tunnel is analyzed by finite element analysis method.Combined with the finite element analysis results,the construction is carried out by combining the portal anti floating structure with foundation grouting reinforcement,while at the same,the corresponding anti floating measures are assisted to reduce the floating deformation of the operating subway line,so as to ensure the safe operation of the subway and the smooth construction of the project.