Launching floating transportation and underwater assembly process of fabricated comprehensive pipe gallery

Abstract

The invention relates to a launching floating transportation and underwater assembly process of a fabricated comprehensive pipe gallery. The process comprises the steps that each pipe gallery pipe joint is horizontally transported between a prefabricated yard and a field through a transporting girder vehicle; the pipe gallery pipe joints flatly fall at the top of a rail car; the rail car is drawnto a launching tackle; the launching tackle achieves slow launching along a tackle rail; water floating force is fully utilized; after the pipe gallery pipe joints are subjected to floating transportation to mounting positions, the pipe gallery pipe joints slowly sink; and after two pipe gallery gates are aligned to meet the requirement, pipe segment gravity completely acts on a substrate. According to the process, large-section and long-segment overall mounting under the water environment is achieved, the water floating force is fully utilized, and the pavement and foundation treatment construction steps of the shore side are reduced; compared with a traditional process, the construction cost is greatly reduced, and the risk of water burst after soft soil collapsing is effectively reduced; and the process of reinforcing a foundation through cement stirring and carrying out replacement is adopted, a composite foundation is formed, and the defect that a pipe jacking process cannot carryout foundation treatment is overcome.

Description

technical field [0001] The invention relates to the technical field of urban deep-buried pipe gallery construction, in particular to a process for launching, floating, and underwater assembling of an assembled comprehensive pipe gallery. Background technique [0002] In the construction of urban deep-buried pipe corridors, pipe jacking construction or shield construction is generally used when the burial depth is sufficient and the upper soil is relatively stable, but when the burial depth is shallow and the In the case of weak upper soil, it is not suitable for pipe jacking construction or shield construction. In addition, because pipe jacking construction is difficult to carry out foundation treatment, it is not suitable for pipe jacking construction in soft soil base. [0003] The conventional prefabricated assembly type needs to provide dry construction conditions, and the installation and construction can be completed quickly and conveniently after the excavation of the...

AI Technical Summary

Problems solved by technology

For open-cut prefabricated construction, foundation pit dewatering is required under water conditions, and construction methods such as open ditch drainage or well point dewatering are used. However, in areas such as river branches or slope protections with abundant groundwater resources, dewatering is difficult and cannot meet dry conditions. However, it is difficult to ensure the pouring quality of the concrete at the stubble position when the prefabricated pipe gallery is installed underwater, and there is a risk of water seepage. Therefore, it is necessary to provide a floating and underwater assembly process for the prefabricated comprehensive pipe gallery

Images