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随着高等级公路建设步伐的加快和沿江、沿海经济的快速发展,盾构隧道工程项目朝着大型化、综合化、复杂化方向发展,特别是大型越江跨海盾构隧道工程不断涌现,安全控制、环境影响控制和工期控制等要求越来越高,其中如何在长距离施工中保证大直径越江跨海隧道轴线精度成为施工关键,本文以目前世界上直径最大、同级别盾构机一次性掘进距离最长的盾构隧道-上海长江隧道工程为例,详细阐述高精度管片制作拼装、贯通测量及盾构姿态控制等隧道轴线精度控制的关键技术,并形成相应的三维轴线控制技术,为日后攻克更大、更长盾构隧道轴线控制给予借鉴意义。
With the acceleration of the construction of high-grade highways and the rapid economic development along the Yangtze River and the coast, the shield tunnel projects have been developing in a large scale, integrating and complicating. In particular, large-scale cross-sea shield tunnel projects are emerging continuously, with safety Control, environmental impact control and construction period control are getting higher and higher. Among them, how to ensure the axial accuracy of large-diameter cross-sea tunnel in long-distance construction becomes the key point for construction. Based on the current situation of the world’s largest diameter shield machine at the same level The tunnel tunnel project with the longest tunneling distance - Shanghai Yangtze River Tunnel project is taken as an example, and the key technologies of tunnel axis precision control such as high-precision segment fabrication, penetration measurement and shield attitude control are elaborated in detail, and the corresponding three-dimensional axis control technology is formed, It can be used as a reference to overcome the axial control of larger and longer shield tunnels in the future.