Floating-type underwater gravel base bed continuous leveling ship

Abstract

The invention provides a floating-type underwater gravel base bed continuous leveling ship, which comprises a hull. Lifting positioning piles are arranged at a bow and a stern of the hull and slidablyconnected with the hull; a conveying trolley is further arranged and driven by a driving device to slide in the length direction of the hull, an articulated chute is arranged on the conveying trolley, a material feeding opening is formed in the top end of the articulated chute, and the bottom end of the articulated chute is close to the water bottom; and one or more conveying belts for supplyingmaterials to the conveying trolley are further arranged. By adopting the scheme that the positioning piles and the hull are slidably connected in the horizontal direction, after riprapping construction is completed in an area, precisely guided continuous moving can be achieved by moving the positioning piles and the hull in a reciprocating mode, thus the situation that the hull needs to be re-positioned every time when the hull is moved is avoided, and high-precision and continuous Z-shaped riprapping paving construction is achieved through the articulated chute.

Description

Technical field [0001] The invention relates to the field of underwater engineering construction, in particular to a floating underwater gravel bed continuous leveling ship. Background technique [0002] The immersed tube method is a construction method for building tunnels underwater. An immersed tube tunnel is an underwater tunnel constructed in this way by floating several prefabricated sections to the sea (river surface) site, and installing them one by one in the dredged foundation trench. In order to avoid local high points of the foundation, the immersed pipe bottom plate is evenly stressed, and a high-precision leveling gravel cushion is designed between the bottom plate and the foundation as the foundation bed. A special gravel cushion paving ship with high leveling accuracy is required for construction. [0003] The representative ship is the FLINTSTONE, a dynamic positioning drop tube rappel under the DEME Group, which is the largest rappel in the world. The ship adopt...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the cost is extremely expensive, and the pile legs need to be inserted into the groove of the tunnel foundation bed, which has a certain damage to the foundation

[0005] Chinese patent document CN107489154A records a construction method for leveling deep-sea foundation beds, which implements rock throwing through the movement of the hull. The existing problem is that the hull is affected by waves during the movement process, and the construction accuracy is not high.

However, with this scheme, after a construction area is completed, the hull needs to be moved as a whole and repositioned. In the repositioning process, it is necessary to rely on the positioning accuracy of GPS, which has the problems of slow positioning speed and poor positioning accuracy.

Further, it also records the scheme of controlling the balance pipe to expand and contract repeatedly through the hydraulic cylinder to adjust the stroke, but due to the influence of water flow and wind and waves, it is difficult to keep the riprap pipe vertical. Although the inclinometer is recorded in the manual, the It does not record how to correct the inclination of the riprap pipe according to the inclination to ensure the flatness of the foundation bed

Further, since the hydraulic cylinders are located underwater, and each hydraulic cylinder has oil inlet and oil return pipes, it is very difficult to accurately control multiple hydraulic cylinders, and many hydraulic oil pipes make the lifting control of the riprap pipe very troublesome

Furthermore, the above-mentioned document also records that the leveling head is used to scrape the foundation bed, but as the length of the riprap tube increases, the bending deformation of the riprap tube increases, and the leveling accuracy of this solution is difficult to control

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