南京南站北广场跨越地铁隧道的基础设计

Foundation design of spanning over metro tunnels of Nanjing South Station North Plaza

南京南站北广场地下空间同时跨越了已建地铁1号线及在建地铁3号线,跨度达20～30m。为了保证工程安全及施工对地铁不会造成较大影响,对该结构的厚板桩筏式托换基础提出了严格的变形要求。针对该部分的基础设计及施工监测进行了总结与探讨,可为该类形式的设计提供参考。

The underground space of Nanjing South Station North Plaza spans the built Metro Line 1 and under-construction Line 3,and the span reaches 20 to 30m.To guarantee the safety of construction and the subway,the deformation of the pile raft transfer foundation with thick slab is strictly required.The foundation design and the construction monitoring methods were summarized,which provide reference for similar projects.