对软土地区地铁隧道穿越既有桥梁桩基托换施工技术的研究

Research on Construction Technology of Subway Tunnel Crossing Existing Bridge Pile Foundation in Soft-soil Area

随着城市地铁交通的快速发展、地下交通网络的不断完善,但是最近几年随着建设工程的发展,在实际施工中,地铁施工通常存在穿越既有桥梁桩基的情况,甚至有一些桩径大埋深深的桥桩基础,这不仅增加了地铁隧道的施工难度,还对既有桩基结构物有一定的影响,往往妨碍地铁隧道的正常施工。按经验,这时一般都会考虑采用桩基托换技术。因此,拟建某施工项目的具体情况进行分析,旨在为类似条件下的工程提供参考。

With the rapid development of urban subway transportation and the continuous improvement of underground transportation network, in recent years, with the development of construction projects, in actual construction, subway construction usually has the situation of crossing existing pile foundations, and even some pile diameters are buried deep in the pile foundation. This not only increases the construction difficulty of the subway tunnel, but also has a certain impact on the existing pile foundation structure, which often hinders the normal construction of the subway tunnel. According to experience, pile foundation underpinning technology is generally considered at this time. The specific situation of the proposed construction project is analyzed to provide reference for the project under similar conditions.