The excavation depth of the foundation pit of the project is 8.00 ~ 10.80m, and the safety level of the foundation pit environment and the structure of the foundation pit support design are both level 1. Among them, the north section of the west side of the project is a 5-story residential building built in 2000, and the minimum distance between the top of the excavation slope and the bottom boundary line of the residential building and the wall of the residential building is 6.0m and 2.8m, respectively. The construction unit uses our company's automatic monitoring equipment to supplement the original third-party monitoring scheme to carry out 24h automatic monitoring of parameters such as water level, supporting axial force, deep soil displacement, the tilt and settlement of the main body of the old building and the wall during the construction of the foundation pit and the surrounding environment. At the same time, complete the foundation pit bim model modeling and the construction of the project intelligent construction information exhibition hall.