联络通道施工盾构机始发对已建盾构隧道影响试验研究  

Impact of starting of tunnel boring machine during construction of connecting channel on existing shield tunnels

作　　者：黄大维[1,2,3] 陈后宏 徐长节 罗文俊[1,2,3] 耿大新 刘家璇[1,2,3] HUANG Dawei;CHEN Houhong;XU Changjie;LUO Wenjun;GENG Daxin;LIU Jiaxuan(State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China;East China Jiaotong University,Nanchang 330013,China;Jiangxi Provincial Key Laboratory of Comprehensive Stereoscopic Traffic Information Perception and Fusion,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,江西南昌330013 [2]华东交通大学,江西南昌330013 [3]综合立体交通信息感知与融合江西省重点实验室,江西南昌330013

出　　处：《岩土工程学报》2025年第5期987-994,共8页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(52078213,52378398);江西省主要学科学术和技术带头人领军人才项目(20232BCJ22009);江西省自然科学基金资助项目(20242BAB26077)。

摘　　要：盾构法联络通道施工过程中盾构机始发对已建盾构隧道受荷变形影响暂不明确问题,通过设计1︰10的缩尺模型试验,开展了盾构机始发对已建盾构隧道影响试验研究。试验结果表明:盾构法联络通道施工时,在盾构机顶推反力作用下,始发端已建盾构隧道在联络通道位置约1倍隧道直径范围内发生了横椭圆变形,而两端则发生了竖椭圆变形;盾构隧道发生横断面变形时,水平直径变形约为竖向直径变形的3~4倍;在联络通道位置约1倍隧道直径范围内向顶推反力方向发生了水平挠曲变形,而在其两侧方向上发生了水平挠曲反弯现象;竖向挠曲变形趋势与水平挠曲变形相同,且比水平挠曲变形的幅度小;联络通道位置约1倍隧道直径范围内的水平直径增大导致隧道两侧的水平土压力均增大,竖向直径减小导致隧道顶部与底部的竖向土压力均减小;盾构隧道周围的土压力变化是盾构隧道横断面变形与纵向挠曲变形共同作用的结果,在盾构隧道受力分析过程中建议同时考虑其横断面变形与纵向挠曲变形。The impact of starting of tunnel boring machine(TBM)on the deformation of the existing shield tunnels under loads during the construction process of connecting passage by the shield tunneling method is currently unclear.By designing a 1:10 scaled model experiment,the experimental researches on the impact of starting of the TBM on the existing shield tunnels are conducted.The results indicate that,during the construction of connecting passage by the shield tunneling method,under the action of the top pushing reaction force of the TBM,the existing shield tunnels at the starting end undergo horizontal elliptical deformation within a range of about 1 tunnel diameter at the position of connecting passage,while the vertical one occurs at both ends.When a shield tunnel undergoes cross-sectional deformation,the deformation of horizontal diameter is about 3~4 times that of the vertical one.The horizontal bending deformation occurs in the direction of upward pushing reaction force within a range of approximately 1 tunnel diameter at the location of the connecting passage,and the horizontal bending phenomenon occurs on its both sides.The trend of the vertical deflection deformation is the same as that of the horizontal one,and its amplitude is smaller than that of the horizontal deflection deformation.The increase in the horizontal diameter within the range of about 1 times the tunnel diameter at the location of the connecting passage leads to an increase in the horizontal soil pressures at both sides of the tunnel,while the decrease in the vertical diameter leads to a decrease in the vertical soil pressures at both the top and bottom of the tunnel.The variation of soil pressures around the shield tunnel are the result of the combined action of cross-sectional deformation and longitudinal deflection deformation of the shield tunnel.It is recommended to consider both the cross-sectional deformation and the longitudinal deflection deformation in the stress analysis process of the shield tunnel.

关 键 词：联络通道 盾构隧道 盾构法施工 顶推反力 挠曲变形 

分 类 号：TU45[建筑科学—岩土工程]