軟弱地層盾構(gòu)隧道側(cè)穿橋梁樁基影響分析

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【中圖分類號(hào)】：U445.43 【文獻(xiàn)標(biāo)志碼】：C 【文章編號(hào)】：1008-3197（2025）02-25-04

【DOI編碼】：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

地鐵隧道在施工過程中會(huì)遇到下穿或鄰近城市橋梁樁基的情況，目前國內(nèi)已有眾多隧道穿越橋梁的工程案例＼～5]。（剩余4027字）