Abstract:In virtue of the design of rainwater pumping station in an railway underpass project, the differences between the open-excavated underground tank and open-caisson underground tank are compared. Firstly, starting from the structural stress, the stress conditions of the tank body in different forms are analyzed. Then, the engineering costs, construction periods, construction technical requirements and construction qualities of two forms of open excavation and open caisson are compared. The comparison results can provide the reference for the comparison of the structural forms and construction schemes of underground tanks in pumping station in the future.