Taking the foundation pit project of Qiligou Station in Xuzhou Metro Line 4 phase I engineering as an example.Through the investigation and reasonable analysis of the hydrogeology and surrounding environment of the project site,the foundation pit support scheme is adjusted and optimized.The results show that in the construction site with uneven distribution of soil particles and high groundwater level,layered excavation can shorten the construction period while maintaining the stability of the support structure.At the same time,the use of casing secant pile,bent cap,steel support and steel purlin around as a combined foundation pit support structure can effectively control the deformation of foundation pit and groundwater infiltration.
subway stationfoundation pit support schemesecant pile
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