Study on Deformation Law of Deep Foundation Pit with the Top-Down Method and Its Influence on Adjacent Subway Tunnel

Table 1

Main construction stages.

Stage	Construction operation	Scheduled start date
1	Construction of the diaphragm wall of section C	11/01/2013
2	Construction of the ACIP piles of section C, excavation, and construction of sections A and B	02/01/2014
3	Excavation to a depth of 2.3 m and casting of slab B0	10/20/2014
4	Excavation to a depth of 7.3 m and casting of slab B1	01/17/2015
5	Excavation to a depth of 10.8 m and casting of slab B2	02/04/2015
6	Excavation to a depth of 14.3 m and casting of slab B3	05/27/2015
7	Excavation to a depth of 18.5 m and casting of the basement slab	07/21/2015