软弱地层盾构隧道侧穿桥梁桩基影响分析

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【中图分类号】：U445.43 【文献标志码】：C 【文章编号】：1008-3197（2025）02-25-04

【DOI编码】：10.3969/j.issn.1008-3197.2025.02.006

Research on the Influence of Shield Tunnels in Weak Strata on Bridge Pile Foundations

LI Jianqiang1，YUQi2，ZHANG Jiawei2

（1.TianjinBinhaiNewAreaRailransitIvestment&DevelopmentoLd.Tianjin3Oo450，China；2.TianjinMunicipalEging Design&ResearchInstituteCo.Ltd.，Tianjin30o392，China）

【Abstract】：Inorder to research the impact of subway shield tunnelconstructiononadjacent bridge pile foundations，Midas GTS NX finiteelement numerical analysis software Was used to simulate the actual construction conditions of shield tunnelexcavation and analyze the deformationof bridge pile foundations during shield tunneling.The resultsshowthattheconstructionof intermediate tunnels in weak strata hasacertain impactonthe deformationof adjacent bridges.The maximum verticaldeformationof the bridge is 4.25mm，the maximum horizontal deformation is 2.19 mm，and thesettlement diference betweenadjacent piers andabutments is 2.39 mm.The numerical calculation is basicallyconsistentwith the on-site measured data，and thedeformation of the bridge structure meets the control requirements.

【Key words】：shield tunnel； urban bridges；weak strata

地铁隧道在施工过程中会遇到下穿或邻近城市桥梁桩基的情况，目前国内已有众多隧道穿越桥梁的工程案例＼～5]。（剩余4027字）