商合杭铁路车站路基地基处理与支挡设计

高速铁路车站路基由于路基宽度较宽,周边环境复杂与站房工程接口十分复杂,其地基处理和支挡结构设置需要考虑的因素众多,导致其设计远较区间路基复杂。商合杭铁路车站路基主要采用了CFG桩复合地基、螺杆桩复合地基、管桩桩筏结构、钻孔桩桩筏结构等地基处理方式,支挡结构采用了悬臂式挡土墙、扶壁式挡土墙、桩板墙。施工实践证明,这些工程方案是可靠的,但是在细节上也存在一些值得思考的问题。本文详述了在建商合杭铁路车站路基的地基处理和支挡工程措施及其存在的问题、解决方案及工程效果,可作为类似工程的设计参考。

Foundation Treatment and Retaining Design for Station Subgrade of Shangqiu-Hefei-Hangzhou High-speed Railway

The high-speed railway station subgrade is much more complicated than the section subgrade in design due to its larger width,complex surroundings and interfaces with station house works,and other considerations in foundation treatment and retaining structure.At the stations along the Shangqiu-Hefei-Hangzhou High-speed Railway,CFG pile composite foundation,screw pile composite foundation,pipe pile raft structure and bored pile raft structure are adopted for subgrade foundation treatment,and the cantilever retaining wall,counterfort wall and pile-slab wall are used as the retaining structure.Construction practices have proved that these engineering schemes are reliable,but there are also some problems worthy of consideration in details.In this paper,the author described in detail the foundation treatment and retaining engineering measures for the station subgrade of Shangqiu-Hefei-Hangzhou High-speed Railway under construction and the existing problems,solutions and engineering effects,which could be used as a reference for the design of similar projects.