For urban subways with complex surrounding environments,the selection of construction methods for underground excavation stations is particularly important to ensure the safety of the station and surrounding environment.During the construction of the Financial Street Station of Beijing Metro Line 19,a construction scheme of PBA method was proposed.Combined with the actual application of PBA method,the process flow and the design of the secondary lining trolley are briefly introduced.Based on the finite element method,the safety of the formwork support during the concrete pouring process is checked.The calculation results show that the internal force and strength of each member of the combined support are within the allowable range,and the stability of the member and the anchoring strength of the embedded parts meet the requirements.The smooth implementation of the Financial Street Station has verified the feasibility of this method,which can provide reference for similar projects,and has high engineering application value.
维普
万方数据
