Spiral anchor-anti-sinking plate-jacket composite foundation and construction method thereof

Abstract

The invention provides a spiral anchor-anti-sinking plate-jacket composite foundation and a construction method thereof. The spiral anchor-anti-sinking plate-jacket composite foundation comprises anti-sinking plates, flanges, spiral anchors and connecting blocks; the spiral anchors are formed by arranging spiral pieces on the middle lower sections of anchor rods; the flanges are connected with the upper ends of the anchor rods; connecting holes are formed in the lower sides of the anti-sinking plates and correspond to mounting holes in the flanges; a plurality of anti-sinking plates are arranged in an array mode; a plurality of flanges are arranged on the lower side face of each anti-sinking plate in an array mode; each flange is connected with the corresponding spiral anchor; the spiral pieces on the spiral anchors are divided into left-handed spiral pieces and right-handed spiral pieces; and jackets are connected with the connecting blocks in the anti-sinking plates. The problems that the bearing capacity of original traditional jackets can be achieved only through rock-socketed construction, the construction period is long, and the cost is high are solved, and the spiral anchor-anti-sinking plate-jacket composite foundation has the advantages of being convenient to assemble and transport, beneficial to recycling, good in anti-pulling and anti-pressing performance, high in strength, stable in structure, good in anti-overturning performance, high in construction efficiency and easy and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of offshore wind power foundations, and relates to a helical anchor-anti-settling plate-jacket composite foundation and a construction method thereof. Background technique [0002] In energy utilization, onshore oil and gas resources can no longer meet the needs of social development and progress. Gases such as carbon dioxide and sulfur dioxide emitted during the process of burning fossil energy pollute the environment while producing a greenhouse effect. [0003] Therefore, my country has gradually shifted the goal of energy development to marine clean energy. Offshore wind energy is a clean energy with stable production capacity, high utilization efficiency, environmental protection and pollution-free. Jacket is a common platform support in offshore wind power projects. Jacket It consists of leg columns and vertical and horizontal bars connecting the leg columns, on which the wind tower is lapped. The jack...

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Problems solved by technology

[0004] At present, multiple single pile foundations connected at the bottom of the traditional jacket need to be constructed by rock-socketed construction in sea areas under geological conditions of shallow overburden to provide sufficient composite bearing capacity such as pullout resistance, horizontal resistance, and overturning resistance. However, rock-socketed construction is extremely difficult. Greatly increases the construction cost, difficulty and period; in addition, with the increase of offshore structures such as offshore wind turbines, higher requirements are placed on the bearing capacity of the bottom foundation, which will lead to a decrease in the amount of steel used for the bottom single pile foundation. increase the construction cost

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