Analysis of the Impact of Deep Foundation Pit Construction on Nearby Operating Subways and Its Measures
The foundation pit of the Xi'an Station renovation and expansion project is adjacent to the existing Xi'an Metro Line 4 operating subway section tunnel.The construction of the foundation pit has a significant impact on the safety of subway operation and is difficult to control.By establishing a finite element overall model of"foundation pit-soil-structure",the entire process of foundation pit excavation was numerically simulated,and the stress and deformation evolution laws of the support structure and interval tunnel caused by foundation pit construction under different construction organization modes were obtained.The calculation results indicate that through reasonable construction organization,accurate numerical simulation,reliable risk countermeasures and monitoring measures,the deformation of the foundation pit and subway section tunnel can be effectively controlled within the allowable range,thereby ensuring the safety of the station structure construction.This can provide design and construction experience for similar projects in the future.
deep foundation pitadjacent to subwayssection tunnelnumerical simulationrisk countermeasures
NETL
NSTL
万方数据
