English：

Taking the construction using the arch cover method of the underground excavation section of asubway station as the research object, the key technologies in the construction process arecomprehensively analyzed. Firstly, the application advantages of the arched cover method in subwaystation engineering were introduced, such as reducing the number of pilot tunnels, simplifying theconstruction process, reducing stratum disturbance, reducing land subsidence, etc. Then, theadaptability of the arched cover method to surrounding rock conditions was analyzed, and it is pointed outthat this method is especially suitable for weathered rock strata, especially for upper⁃soft lower⁃hard soil⁃rock composite strata. Next, the key technologies involved in the construction process are discussed indetail, including buckle⁃arch construction, large arch foot construction, and so on. It is particularlyemphasized that in the actual project it is necessary to study the key technology of initial support in depthand select the appropriate primary support method and construction scheme in accordance with thespecific working conditions.