箱涵顶进施工中沉降监测及有限元分析

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中图分类号：TU432 文献标识码：A DOI： 10.7535/hbgykj.2026yx01003

Abstract：To reveal the setlement variation paterns of the overburden layer subsidence during the box culvert jacking influenced byoverburden layer thickness，grouting reinforcement，andfriction-reduction treatment，andtoimprove the constructioncontrol technology for the boxculvert jacking，setlement monitoring and displacement analysis were performed based on an actual bridge and culvert enginering project.Thefinite element software ABAQUS was used to compare the constructionsettlementmonitoringandverifytheaccuracyof themodel.Byestablishingthree-dimensionalsolidfiniteelement models of the soil and box culvert with different overburden layer thicknesses （ 2m ， 3m ，and 5m ），the relationsip between jacking displacement and overburden layer settlement during the boxculverts jacking processwas analyzed.Theresults show that overburden layer thickness has a significant influence on surface settlement. Compared with the 2m case，settlements amounts of 3m and 5m thicknesses were reduced by 21.3% and 32.7% ，respectively. Thicker overburden layers help distribute jacking pressure more evenly，reduce soil deformation，and effectively decrease settement. In the 5m overburden conditio，additional measuressuchas grouting reinforcementof theuppersoil and friction-reduction treatmentatthe base further decrease settlement by 7.0mm and 3.7mm ，respectively. Settlement is mainly concentrated within 30m of the culvert centerline，and the influencerapidlydecreasesbeyond thisrange.Thestudycan help explorethe factorsinfluencing the overburdenlayersetlementduringthetheboxculvertjackingandoffertheoreticalsupportfortheoptimaldesignofboxulvert construction under silty clay conditions.

Keywords：bridge and culvert engineering；boxculvert jacking construction；finite elementanalysis；overburden layeretlement;grouting； friction reduction

随着中国城市化进程的加速推进，对地下空间的开发利用逐渐成为缓解交通压力、优化基础设施布局的重要手段[1-3]。（剩余10728字）