Incremental launching technology of submerged cable-stayed floating tunnel

Abstract

The invention discloses incremental launching technology of a submerged cable-stayed floating tunnel. The incremental launching technology of the submerged cable-stayed floating tunnel comprises the following steps that all pipe joints of the submerged floating tunnel in a land area prefabrication yard are prefabricated, then the pipe joints are transported to an incremental launching side shore connecting structure through a land area slope tunnel, secondary outfitting is successively carried out, the pipe joints are docked with the subsequent pipe joints and sealed into water, then the pipejoints are in a receiving side shore connecting structure section by section in an incremental launching manner; stay cables are installed on the pipe joints one by one along with incremental launching and pulled to a stay cable anchorage pier; and after incremental launching is completed, concrete on the outer surface of the pipe joints at both ends of the submerged floating tunnel is poured intothe incremental launching side shore connecting structure and the receiving side shore connecting structure, the consolidation of the pipe joints at both ends of the submerged floating tunnel is completed, then the buoyant weight ratio can be adjusted by adjusting the ballast water volume in each pipe joint, and the cable force adjustment of the stay cable is carried out and the sealing anchor iscarried out at the stay cable anchorage pier. The incremental launching technology of the submerged cable-stayed floating tunnel has little influence by wind, wave, current, ship traveling wave and the like, greatly reduces the safety risk of man-machine for offshore construction, and has 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

Images