盾构近距离下穿人防通道影响分析

Analysis on Influence of Shield Passing Through Antiaircraft Tunnel at Close Range

以某盾构区间近距离下穿人防通道为研究对象,场区位于圆砾层,人防通道非钢筋混凝土结构,采用地面注浆对其进行加固保护。通过建立三维有限元数值模型,分析盾构下穿过程中对其影响,地表对打沉降2.4 mm,人防通道最大沉降2.06 mm,变形均满足控制标准要求,研究成果可为现场施工及类似工程提供参考依据。

Taking the shield section passing through a antiaircraft tunnel at close range as the research object,the field area is located in the round gravel layer,and the antiaircraft tunnel is a non reinforced concrete structure. Using ground grouting to reinforce and protect the antiaircraft tunnel. Establish three-dimensional finite element numerical model,analyse the influence of shield tunneling process. The ground surface settlement is 2.4 mm,the maximum settlement of antiaircraft tunnel is 2.06 mm. The deformation meets the control standard requirements. The research results can provide reference for site construction and similar projects.