软土地区地铁出入口矩形顶管法施工技术探讨

Discussion on construction technology of rectangular pipe jacking at entrance of subway in soft soil area

天津地铁红旗南路站新建B号出入口采用矩形顶管法施工,以验证在天津地区富含地下水的软土地质条件下,采用大断面矩形顶管设备穿越复杂市政管线及交通主干道路的可行性。文章就该工程的重难点问题,以及施工过程中出现的风险问题进行阐述并提出相应的技术措施,以期为后续地铁新线建设提供借鉴。

The rectangular pipe jacking method is used to construct the new entrance and exit B of Hongqi South Road Station of Tianjin metro,in order to verify the feasibility of large section rectangular pipe jacking equipment to cross complex municipal pipelines and traffic main roads under the soft soil geological conditions rich in groundwater in Tianjin.This paper expounds the key and diffi cult problems of the project,as well as the risk problems in the construction process,and puts forward the corresponding technical measures,providing reference for the future construction of new metro lines.