Dry dock arrangement method based on immersed tunnel crossing river

Abstract

The invention provides a dry dock arrangement method based on an immersed tunnel crossing a centerline, which comprises the following steps of: taking a foundation trench excavated in the middle line of a tunnel line on the upper edge of the centerline as a dry dock prefabricated pipe joint, dragging a first batch of pipe joints out of the dock through dock gate hinges arranged at two ends of the foundation trench to carry out sinking butt joint, and prefabricating subsequent batches of pipe joints after a dock gate is recovered; and the last batch of pipe joints are foundation trench inner pipe joints, sinking butt joint is carried out through ground anchor hinge dragging, final joints are poured in an underwater joint mode, and finally construction of the immersed tunnel is completed. According to the method, a dry dock does not need to be independently built, the problem that the site selection difficulty of a different-place dry dock is large is solved, long-distance floating transportation is not needed, large-range channel dredging is avoided, the pipe section floating transportation risk is reduced, the project investment is greatly reduced, and meanwhile, the underwater final joint is adopted, and the problem that the construction period of a conventional axis dry dock is long is solved.

Description

technical field [0001] The invention belongs to the technical field of immersed tube tunnel construction, in particular to a dry dock arrangement method based on the immersed tube tunnel crossing Jiangxinzhou. Background technique [0002] The existing technology of immersed tunnels has a history of more than 100 years in various countries in the world. China introduced this technology in the late 1990s. At present, there are only more than 10 immersed tunnels in China. Therefore, the design of immersed tunnels , Construction technology research, re-innovation has great value and significance. [0003] The prefabricated site for pipe joints is also called dry dock, which is divided into off-site dry dock and axial dry dock according to the relationship with the tunnel site. Off-site dry-dock is to choose a suitable shore area far away from the tunnel site to build dry-dock independently. The biggest advantage of the off-site dry dock is that the key processes such as the s...

AI Technical Summary

Problems solved by technology

The biggest advantage of dry docking in different places is that the key processes such as the structure of the shore section, the manufacture of pipe joints, and the excavation of foundation trenches can be operated in parallel, which can save the construction period to the greatest extent, but increases the cost of dry dock construction and channel dredging

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