One-quarter cylinder on-site splicing method for lattice type steel sheet pile large cylinder main lattice sheet piles

Abstract

The invention discloses a one-quarter cylinder on-site splicing method for lattice type steel sheet pile large cylinder main lattice sheet piles. According to the overall method, a full circle main lattice is divided into four one-quarter circular steel sheet pile assembly pieces which are respectively lifted, and therefore the requirements for the lifting distance and the lifting capacity of a crane ship are lowered; meanwhile, the on-site workload is greatly reduced; only the four one-quarter circular steel sheet pile assembly pieces need to be hung, and then four folding piles are spliced. By the utilization of the scheme, under the on-site conditions (namely high construction region limit, shallow water, poor geological conditions and high marine environmental requirements) that all is limited and under the execution conditions including construction period requirements, a lattice type steel sheet pile large cylinder can be accurately and stably lifted and sunken.

Description

technical field [0001] The 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 off-site into a full circle on-site during the construction of a large cylinder of lattice-type steel sheet piles on the sea. 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. Therefore, the construction of artificial islands has changed or improved the above-mentioned dif...

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Problems solved by technology

[0008] The present invention aims at the construction process of the artificial island formed by backfilling the cofferdam formed by the large cylinder of lattice-type steel sheet piles and the breakwater, which is faced with the site conditions of "limited up, down, left, and right" (that is, the height limit of the construction area, shallow water depth, etc.) , poor geological conditions, high requirements for marine environmental protection) and the construction conditions required by the construction period, it is impossible to pre-assemble the main grid steel sheet pile on site, and it is impossible to complete the overall hoisting and sinking of one main grid at one time, and provide a grid type steel sheet pile On-site splicing method of 1 / 4 cylinder of large cylinder main grid sheet pile

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