In response to the issue of mutual influence between adjacent existing railway projects during excavation of foundation pits,a three-dimensional finite element model was established using the open excavation section of the Qin-Wang Tunnel as an example.The influence of excavation on the surrounding structure,ground surface,and deformation of adjacent railway projects was analyzed by combining passive zone strip drawing and border reinforcement.The influence of reinforcement parameters on the deformation of adjacent railway engineering buildings was studied,and the causes of deformation were analyzed,then the optimal reinforcement parameters for specific projects were proposed by using principal component analysis.The results indicate that the passive zone undergoes changes in the natural ground surface settlement curve under various reinforcement methods.For the deformation of railway subgrade infrastructure,it is influenced by multiple factors.Increasing the width of reinforcement strips is beneficial for reducing lateral displacement,while increasing the width of border reinforcement is beneficial for reducing settlement.
deep foundation pitpassive zone reinforcementnumerical simulationadjacent to existing railwaysprincipal component analysis
NETL
NSTL
万方数据
