Numerical Study on Stratigraphic and Structural Deformation Patterns Considering Surface Load with Pile-Beam-Arch Method Construction

Due to soil disturbance during the construction of metro stations, initial stress stratum is modified, leading ground settlement within a particular range, fracturing surrounding buildings and even causing significant deformation building collapse. This paper employed Pile-Beam-Arch method assemble Daguanying Station Beijing Metro Line 7 as engineering background. The numerical calculation was used study regulations structural throughout stage. Meanwhile, effect surface loading taken into account control strategies were suggested. Finally, Stochastic medium theory predict settlement. It evident from study’s findings that pilot tunnels excavation arches installation accounted for 67% 23.1% total settlement, respectively, produced most Surface can be significantly reduced by utilizing grouting reinforcement technology approach “upper first, then lower side middle”. structure much less stressed pre-construction stage, with maximum principal ranging 1 5 MPa; after finalized, reached 14.203 MPa, concentrating mostly in middle column part, which consequence combined action upper load uplift. Additionally, there linear relationship between bottom slab situated where structure’s unfavorable components concentrated. conclusions prediction demonstrated discrepancies theoretical simulated; thus, results more conservative. serve reference sites.