车辆荷载作用下地铁隧道基坑变形规律研究

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中图分类号：TU463 文献标志码：A 文章编号：1005-8249（2025）03-0149-07

DOI：10.19860/j.cnki.issn1005- 8249.2025.03.027

Abstract：To explore theinfluenceofvehiclespeedandloadonthedeformationof deepfoundation pits，thispapertakes the excavationofadeepfoundationpitfortheBeijingSubwayLine3adjacenttotheroadastheengineringbackgroundandusesthe finiteelementnumericalanalysis methodtostudytheinfluenceoftheabovetwofactorsonthesurfacesetlementonthevehicle sideand the horizontaldisplacementofthediaphragmwall.Theresultsshowthattheinfluencerangeof vehicle speedonthe horizontal displacement of the diaphragm wall iswithin 0～6 m from the ground surface，and the influence on the top of the diaphragmwallisthemostobvious.When thedepth exceeds thisrange，thereisnosignificantdiferenceinthehorizontal displacementof thediaphragmwallunderdifferentvehicle speeds.The maximumsurfacesetlement increases withthe ncrease ofvehiclespeed，buttheincreaseamplitudegraduallyweakens withtheincreaseofvehiclespeed.Theinfluenceismostobvious when the vehicle speed is 40～50km/h . Compared to variations in vehicle speed，changes in vehicle load exert a more extensiveimpactonthelateraldisplacementofdiaphragmwalls.Theinfluenceofvehicleloadissignificantlygreaterthanthaof vehiclespeed.Additionally，thesurfacesetlementoffoundationpitsdemonstratesanincreasing trendproportionaltothe escalation of vehicle loads. The research findings could serve as a reference for analogous engineering projects.

Key words：deformation law；vehicle dynamic load;vehicle speed;vehicle load

0 引言

随着城市化进程的加快与不断发展，城市地下空间中的轨道交通也同步快速发展，车辆荷载对于基坑稳定性的影响越来越受到重视[1-3]。（剩余6135字）