Scheme Design of Highway and Municipal Road Underpassing High Speed Railway Bridge
As highways and municipal roads continue to experience significant development,the number of node projects intersecting with HSRs has increased considerably.The major challenge in the preliminary design stage is to efficiently determine the optimal scheme while ensuring the safety of HSRs.To address this challenge,this study uses finite element software to perform 3D numerical simulations on several underpassing projects,analyzes the factors that affect the displacement of HSR bridges and compares different design schemes.In consideration of control requirements of design,monitoring,and maintenance,it is recommended to adopt monitoring alarm value as limits for scheme design.Whenever possible,the route should intersect with the HSR orthogonally or at a large angle.If the route is in close proximity to the pavement,it is preferable to use shallow excavation through U-shaped grooves.In cases where deep excavation is required,it is essential to flexibly select the structural form.Jacking offers more advantages than excavation and casting in situ.
HSRhigh-speed rail bridgemethod of under cuttingdisplacement of pier top
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NSTL
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