科技创新与应用2024，Vol.14Issue(18)：67-70,4.DOI:10.19981/j.CN23-1581/G3.2024.18.015
地铁盾构隧道侧穿桥梁施工稳定性分析
摘要
Abstract
In the process of shield tunnel construction,the undisturbed soil is disturbed greatly,which leads to the displacement and deformation of the surface,which affects the stress state of the existing bridge.Taking the side crossing Jinshui Bridge of Qingdao Metro Line 2 as the engineering background,the influence on the deformation of the existing bridge is studied by establishing a three-dimensional finite element model to simulate and analyze the influence of the shield construction process on the settlement of the surface,tunnel and existing bridges.The results show that the surface displacement basically accords with the variation law of the Peck modified formula,and the peak point of the horizontal convergence displacement of the tunnel appears at the arch top,the principal stress of the pier increases with the increase of the pier depth,the vertical stress of the pier presents a state of tension at the upper part and compression at the lower part,and the axial force of the pier varies uniformly along the column depth,and increases with the increase of the depth.The shear stress of the foundation is small in the range of the pier along the transverse direction of the foundation,and increases linearly when it spreads around.关键词
盾构隧道/既有桥梁/长距离侧穿/数值模拟/稳定性分析Key words
shield tunnel/existing bridge/long distance side penetration/numerical simulation/stability analysis分类
交通工程引用本文复制引用
杨利波..地铁盾构隧道侧穿桥梁施工稳定性分析[J].科技创新与应用,2024,14(18):67-70,4.基金项目
山东省自然科学基金项目(ZR2019MEE027) （ZR2019MEE027）
中铁二十五局集团有限公司科研项目(QDDT02-2022-00028) （QDDT02-2022-00028）
