Abstract: With the continuous development of municipal design and construction level in China,the utilization degree of underground space continues to increase,and the buried depth of buildings also gradually increases. As the end facility of the upstream catchment zone,the rainwater pump station requires higher burial depth and higher construction quality for deep foundation pit support. There are many construction technologies for deep foundation pit support,among which the underground continuous wall has the characteristics of good integrity,good water retaining effect and strong applicability. This paper introduces the underground continuous wall technology used in the construction of the deep foundation pit of a rainwater pump station,providing valuable experience for the construction of similar projects.

Key words: deep foundation pit, underground continuous wall, foundation pit support