Abstract: As a new green excavation supporting system, the PC (Pipe-Combination) pile method is widely used in construction in Shanghai and Zhejiang, but its application and research results in subway station construction are still rarely reported. Based on the design and construction characteristics of an auxiliary structure of Fuzhou Metro station and the construction principle of the PC pile method, this study analyzes the key and difficult aspects of the construction of PC pile method in the auxiliary structure of metro station in soft soils by means of theoretical research, field application, monitoring and measurement. The key aspects of the PC pile methods are also introduced. Practice has proved that, compared with the traditional subway supporting structure, the PC pile method improves the comprehensive benefits of the construction progress, quality, environmental protection and cost by nearly 20%. This method positively responds to the national “double carbon” strategic goal and has a wide range of application value in other excavation supporting projects.

Key words: PC Pile Method, Subway Station, Supporting Structure, Design and Construction