Research on Deformation Control of Existing Subway Stations During Ultra-deep Foundation Excavation Construction
The construction of foundation excavation has a great influence on the operation safety of adjacent subway stations.Based on the foundation excavation of a subway station on Chengdu Subway Line 18,the excavation deformation of ultra-deep foundation excavation in composite stratum in different construction environments is studied.The stability and safety of foundation excavation construction are judged according to the deformation of retaining structure and surface settlement.Grouting reinforcement is carried out on the lateral and bottom soil between the new and old stations to ensure the safety of the foundation excavation and the existing station.It is found that the maximum lateral displacement of the retaining structure pile and surface settlement after grouting reinforcement are reduced.
composite stratadeep foundation excavationgroutingreinforcementnumerical simulation
NETL
NSTL
万方数据
