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轨道交通越江隧道工程一旦发生事故将造成巨大的社会影响和财产损失。详细分析了宁波越江隧道盾构施工场地的土层及地下障碍物分布情况,对越江隧道盾构在不同地层及软硬分界面处施工、控制河床冲淤对隧道施工的影响、处理管片上浮、结泥饼、穿越河流段浅覆土等关键技术及工程风险进行了分析评价,提出了越江隧道穿堤设计和施工合理化建议,为软土地区轨道交通越江区间隧道盾构施工提供技术参考。
In case of an accident in the cross-river tunnel project of rail transit, it will cause huge social impact and property loss. This paper analyzes in detail the distribution of soil and underground obstacles in the construction site of shield tunnel in Ningbo Yuejiang Tunnel, and constructs the shield at different strata and soft / hard interface at the cross-river tunnel to control the influence of riverbed scouring and silting on the tunnel construction. , Knot cake and shallow overburden in river section are analyzed and evaluated. The design and construction rationalization recommendations of cross river dike are put forward to provide technical reference for tunnel construction of cross-river tunnel in soft soil area.