車輛荷載作用下地鐵隧道基坑變形規(guī)律研究

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中圖分類號(hào)：TU463 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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

隨著城市化進(jìn)程的加快與不斷發(fā)展，城市地下空間中的軌道交通也同步快速發(fā)展，車輛荷載對(duì)于基坑穩(wěn)定性的影響越來(lái)越受到重視[1-3]。（剩余6135字）