大断面长距离矩形顶管施工变形控制关键因素研究

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中图分类号：U455 文献标志码：A 文章编号：1005-8249（2025）04-0111-06

DOI：10.19860/j.cnki.issn1005-8249.2025.04.021

LI Lin'， ZHANG Wentao²， FENG Mingyue3

（1. School of Civil Engineering， Shijiazhuang Tiedao University， Shijiazhuang O5O043，China; 2. China Railway 24th Bureau Group Corporation Limited，Shanghai 2O0433，China；3.Hebei Provincial Communications Planning，Design and Research Institute Co.，Ltd.， Shijiazhuang O5O2Oo， China）

Abstract：Inorder to explore theinfluence lawsof grouting pressre，frictionalresistance，thrust forceattheexcavation face andsteplengthonground surface setlementduringtheconstructionof large-sectionand long-distancerectangulartoppipe， andtooptimize theconstruction parameters.Taking therectangular toppipechannelprojectoftheDuandian Stationof Jinan Metro Line 4 as thebasis，theorthogonal test method was adopted todesign the numerical simulation scheme，andtheFLAC 3D finitedifferencesoftware wasusedforsimulationanalysis.Theresultsshowthatthegroundsurface monitoringdataduringthe toppipeconstruction processarebasicallyconsistent withthe simulationresults；The steplength is themostsensitivefactor，the thrustforceattheexcavationfaceisanimportantfactor，thegroutingpressureisthesecond，andthefrctionalresistancehas theleastinfluence；Thesteplengthispositivelycorrelatedwiththegroundsurfacesetlement，thethrustfoceatthecavation

faceandthe grouting pressureare negativelycorrelatedwithit，andthefrictionalresistanceis negativelycorrelatedbefore 25kPa and positively correlated after 25kPa ；The optimal construction parameters are： step length 1.5m ，thrust force at the excavation face 200kPa ， grouting pressure 230kPa and frictional resistance 25kPa .The research results can provide a reference fortheconstructionofrectangular toppipe methodtoexcavate the metroentranceandexitchannelintheJin'anarea. Key words： large section； long distance；rectangular pipe jacking； orthogonal text； surface subsidence

0 引言

近年来，我国的城市建设发展速度越来越快，对于城市空间的需求也越来越大，城市建设不断向地下空间开发和规划。（剩余6689字）