桥梁锚碇基坑开挖方式对邻近隧道的影响研究  

Research of Influence of Excavation Method of Bridge Anchorage Foundation Pit on Adjacent Tunnel

作　　者：刘保拴 LIU Baoshuan(Zhoushan Traffic Planning and Design Institute,Zhoushan Zhejiang 316000,China)

机构地区：[1]舟山市交通规划设计院,浙江舟山316000

出　　处：《交通节能与环保》2025年第2期259-263,共5页Transport Energy Conservation & Environmental Protection

摘　　要：本文以公铁两用大桥锚碇基坑工程为背景,通过有限元分析软件ANSYS建立三维模型,并设定粗放开挖、过渡开挖及精细开挖3种工况,研究锚碇基坑开挖对邻近公路隧道的影响,结果表明基坑开挖将造成围岩应力重分布,对结构产生附加应力,引起地层下沉、结构变形及应力增加,3种开挖工况下隧道位移变形量均小于2.5 mm,最大拉应力为0.74 MPa,最大压应力为1.35 MPa,均满足规范要求,其中精细开挖对隧道影响最小。In this paper,based on the anchorage foundation pit engineering of the highway-railway bridge,a three-dimensional model is established by the finite element analysis software ANSYS,and three working conditions of extensive excavation,transition excavation and fine excavation are set up to study the influence of anchorage foundation pit excavation on adjacent highway tunnels.The results show that the excavation of the foundation pit will cause the stress redistribution of the surrounding rock,generate additional stress on the structure,cause stratum subsidence,structural deformation and stress increase.The displacement and deformation of the tunnel under the three excavation conditions are less than 2.5 mm,the maximum tensile stress is 0.74 MPa,and the maximum compressive stress is 1.35 MPa,which all meet the requirements of the specification.Among them,the fine excavation has the least impact on the tunnel.

关 键 词：锚碇基坑开挖 数值模拟 公路隧道 影响分析 

分 类 号：U458[建筑科学—桥梁与隧道工程]