Oceanographic five-buoy-buoyancy-tank combined type foundation structure and construction method thereof

Abstract

The invention belongs to the technical field of foundation structures of oceanographic engineering, and discloses an oceanographic five-buoy-buoyancy-tank combined type foundation structure and a construction method thereof. The foundation structure comprises five buoys which are sequentially connected to form a regular pentagon on the horizontal plane according to the center point of the five buoys; a buoyancy tank is connected between every two buoys; the center line in the length direction of each buoyancy tank penetrates through the axes of the buoys at the two ends of the corresponding buoyancy tank; and a transition section tower is connected to the upper parts of the buoyancy tank and the buoys and is used for being connected to upper wind power equipment. The construction method comprises the steps of prefabricating the structure, carrying out primary adjustment preparation, carrying out overwater towing, sinking the foundation structure into water, carrying out suction penetration, carrying out grouting and ballasting, installing the upper structure and carrying out recycling. The oceanographic five-buoy-buoyancy-tank combined type foundation structure has the characteristics of a gravity type foundation and a suction bucket type foundation, and therefore the bearing capacity can be improved, and meanwhile, the transportation and installation modes are simple and convenient, recycling and reusing can be realized, and the construction cost can be greatly lowered.

Description

technical field [0001] The invention belongs to the technical field of basic structure of ocean engineering, in particular, it relates to a basic structure applied to offshore wind power and offshore wind measurement facilities and its construction method, which realizes the integration of overall assembly, transportation control, sinking installation and recovery. chemical work. Background technique [0002] The development of the offshore wind power industry has led to the construction of a series of wind farms. As a pilot project of offshore wind power projects, the offshore wind tower structure is a kind of high-rise structure building, and the foundation type mostly used is the steel pipe pile foundation. The construction process of this type of foundation is complicated, and transportation and installation require large machinery for transportation and hoisting, so the construction period is long and the construction cost is high; the pile positioning and torsion angl...

AI Technical Summary

Problems solved by technology

The traditional foundation type has a gravity foundation, which relies on the self-weight of the structure and the weight of the filler and ballast on it to resist external loads and maintain structural stability. The construction principle is simple, and the cost of filler and ballast materials is low. They are all very large, and the foundation occupies a wide range of seabed. For deep waters where seabed conditions are also required, construction, transportation methods and costs are all limited

The relatively new tubular foundation structure is simple in form and applicable to a wide range of seabed conditions. At the same time, the tubular skirt has high anti-slip stability and simple construction and installation principles. In the working state, there are problems such as buckling of steel structures such as skirt boards, which also restrict the development of tubular foundations

The above problems also exist in offshore wind power generators. The increase in the capacity of a single unit of wind turbines and the diversity of geological conditions on the seabed in deep waters pose new challenges to the basic structure of offshore wind power equipment.

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