A method of pre-assembled on land and scattered on water for a large cylinder main grid of lattice-type steel sheet piles 1/4

Abstract

The invention discloses a method for 1 / 4 land territory preassembling and overwater dispersion of large cylinder main grids of cellular steel sheet piles. According to the method, for the large cylinder main grids of the cellular steel sheet piles with the diameters of 31.194m, a special crane ship is anchored on the inner side of an island wall, four 1 / 4 circular steel sheet pile assembling sheets are hoisted on the single side, a rotating mechanism is arranged on a supporting tool, the steel sheet pile assembling sheets on the outer side of the island wall respectively rotate to be in place, and thus integral-type assembling of the steel sheet piles of a grid body is completed. After the assembling of the steel sheet piles of the grid body is completed, vibration sink is carried out gradually in a layering mode by adopting a vibration hammer to the design elevation. The technology can complete the construction of causeways of grid steel sheet piles in the land territory formation process quickly with lower construction cost under the conditions of site operation that all directions are restricted.

Description

technical field [0001] The present invention relates to a construction technique of an artificial island on the sea, in particular to a method of splicing 1 / 4 cylinders pre-assembled in the off-site land area into a full circle on site during the construction of a large cylinder of lattice-type steel sheet piles on the sea, and then vibrating and sinking them in place in groups. method. Background technique [0002] Artificial islands are generally artificially built land in shallow waters near the coast. As a place for offshore operations or other purposes, most of them are connected to the shore by trestles or undersea tunnels. In a coastal country with developed modern industry, the dense population and crowded cities along the coast have greatly restricted the further development and construction of new enterprises and public facilities, and the problems of residence, traffic, noise, water and air pollution in the original city itself are also difficult. solve. Therefo...

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Problems solved by technology

[0007] During the construction process of the artificial island formed by backfilling the cofferdam formed by the large cylinder of lattice steel sheet piles and the breakwater, the construction conditions of the construction site are "restricted from top to bottom, left and right" (that is, the height limit of the construction area, shallow water depth, etc.) , poor geological conditions, and high requirements for marine environmental protection), it is difficult to complete the problem within a relatively tight construction period. The invention provides a grid-shaped steel sheet pile with 1 / 4 of the main grid of the large cylinder pre-assembled on land and scattered on the water. Construction Technology of Large Cylinder Principal Cell of Pile

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