Analysis of Influence of On-site Excavating River on Structure of Subway Tunnel in Shanghai
There are so many subway lines in Shanghai.The river construction project often meets the existing subway lines.The planned on-site excavating river directly above the subway line will cause the adverse impact on the structure of subway tunnel because of large unloading work.Taking an actual project as an example,by the calculation and finite element simulation of load change,elastic deformation,tunnel deformation curvature radius and relative deformation,the influence of construction on the operation of built subway is analyzed and studied.The method of"river bottom anti-floating floor+river bottom soil reinforcement(three-axis mixing pile)+anti-heave pile(bored pile)"is adopted to protect the structure of subway tunnel,reduce the influence of river excavation on the operation of the built subway,and provide a reference for the construction of similar projects.
river subwayexcavation unloadingfinite element analysisdisplacementstress
NETL
NSTL
万方数据
