Construction method for continuously prefabricating section bodies of tube sections of immersed tube of dry dock

Abstract

The invention discloses a method, comprising the steps of distributing movable work sheds in a separate warehouse mode in a dry dock according to the amount of section bodies of each tube section, utilizing a reinforcing steel bar binding platform, a formwork trolley and a concrete maintaining platform, performing immersed tube full-section integrated type large-volume concrete continuous pouringconstruction after inner and outer formworks of the section bodies of the tube sections are installed in place. The reinforcing steel bar binding platform, the formwork trolley and the concrete maintaining platform all can both relay on axial slippage rails, free movement or stay can be performed according to a work procedure need, and branch-operation non-interval branch warehouse flow line continuous pouring construction among adjacent section bodies can be achieved. The movable work sheds of the dry dock are utilized to prefabricate the immersed tube, formwork displacement is easy to control, and the location accuracy is higher; tube section prefabricating construction is converted into construction in the movable work sheds from outdoor construction, so that effects of the surroundingenvironmental conditions are weakened, temperature effects are greatly reduced, a work period is shortened, and the problem that the adjacent tube sections can generate cracks due to different ages issimultaneously solved.

Description

technical field [0001] The invention relates to the construction field of immersed tube tunnels. More specifically, the present invention relates to a construction method for continuous prefabrication of immersed pipe sections in dry dock. Background technique [0002] Due to its short construction period, short tunnel extension distance, and less geological constraints, immersed tube tunnels have gradually become a widely used form of underwater tunnels, and the prefabricated construction of pipe joints is particularly critical in the entire construction process. At present, the prefabrication of immersed tube joints mainly adopts two prefabrication methods: the post-casting method and the skipping method. During the post-casting method, the steel bars will be corroded, and the concrete surface will be scaled and polluted. The pouring section is very likely to become a leakage point and a hidden danger to structural safety; although the warehouse jumping method solves the ...

AI Technical Summary

Problems solved by technology

At present, the prefabrication of immersed tube joints mainly adopts two prefabrication methods: the post-casting method and the skipping method. During the post-casting method, the steel bars will be corroded, and the concrete surface will be scaled and polluted. The pouring section is very likely to become a leakage point and a hidden danger to structural safety; although the warehouse jumping method solves the problem of concrete cracks to a large extent, the immersed tube joints are divided into several sections for construction at intervals, and the construction time between the warehouse jumping intervals should not be less than 7 days. The prefabrication period is relatively long, and the reciprocating movement of the steel bar binding platform and formwork trolley is relatively complicated

In addition, in the prefabrication process of immersed pipe sections in the above two ways, the continuous construction of adjacent sections cannot be realized

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