The indoor relative elevation of the project ± 0.000 is equivalent to the Dagu elevation of 4.1m; According to the bidding documents, the project is divided into three construction stages. The first stage is 1 #, 2 #, 6 # and 8 # buildings, the second stage is 3 #, 5 #, 9 # and 10 # buildings, and the third stage is 4 # and 7 # buildings. According to the field survey, the earth excavation of buildings 1 #, 2 #, 5 # and 6 # has been completed