A jacking process for an underwater cable-stayed floating tunnel

Abstract

The invention discloses a jacking process for an underwater cable-stayed floating tunnel. It includes prefabricating all the pipe joints of the underwater floating tunnel in the land prefabrication field, and then transporting them to the shore structure on the pushing side through the land slope tunnel, followed by secondary outfitting, docking with the subsequent pipe joints and sealing them into the water, and then putting them into the water. The pipe joints are pushed up section by section to the shore structure on the receiving side; the stay cables are installed on the pipe joints one by one along with the jacking and pulled into the cable anchorage pier; The concrete on the outer surface of the pipe joints at both ends of the floating tunnel in the water is poured in the shore structure to complete the consolidation of the pipe joints at both ends of the floating tunnel in the water. Adjust the cable force of the stay cables on the anchorage pier and seal the anchor. The jacking process of the present invention is less affected by wind, waves, currents, and ship waves, which greatly reduces the risk of man-machine safety in offshore construction, and has extremely high construction efficiency and short construction period.

Description

technical field [0001] The invention relates to an underwater suspension tunnel, in particular to a jacking process for an underwater cable-stayed suspension tunnel. Background technique [0002] The submerged floating tunnel, the English name is "Submerged Floating Tunnel", referred to as "SFT". In Italy, it is also called "Archimedes bridge", or "PDA" bridge for short. Generally, it consists of a tubular body floating at a certain depth in the water (the space of the tubular body is large enough to meet the requirements of road and railway traffic), a support system (anchor cables anchored on the seabed foundation, piers or floating boxes on the water) and It is composed of structures on both sides of the river. It is a new type of structure that means of transportation across the two banks separated by deep water. It is suitable for all means of transportation that need to pass through the water. It can pass trains, cars, small motor vehicles and pedestrians, and can al...

AI Technical Summary

Problems solved by technology

The buoy-type floating tunnel is suspended on the buoy on the water surface through anchor cables or anchor chains. The gravity of the tunnel is greater than the buoyancy, and the vertical direction is greatly affected by the fluctuation of the tide level; On the anchorage foundation below the bed, the gravity of the tunnel is less than the buoyancy, and the tunnel will displace or shake under the action of hydrodynamic forces; the pier-column type is actually a tunnel bridge supported on underwater pier columns, and the construction is difficult and expensive

Since the tunnel floats in the water, the installation and construction of the tunnel is affected by wind, waves, currents and ship waves. The underwater positioning of the three types of tunnels and the underwater or underwater docking construction are very difficult, and the comfort and safety of the underwater operation period Risks are unpredictable

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