Offshore six buoy and six 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 offshore six buoy and six buoyancy tank combined type foundation structure and a construction method thereof. The foundation structure comprises six buoys arranged in a mode that the center points of the buoys are connected in sequence to define a regular hexagon shape on a horizontal plane, a buoyancy tank is connected between every two adjacent buoys, and the center line in the length direction of each buoyancy tank penetrates through the axes of the buoys on the two ends of the buoyancy tank; and a transition section tower is connected to the upper portions of the buoys and the upper portions of the buoyancy tanks, and the transition section tower is used for being connected with upper wind power equipment; and the construction method comprises the steps of structure prefabrication, primary adjustment preparation, overwater towage, water entrance of a foundation, negative pressure penetration, grouting and ballasting, upper structure installation and recycling. The foundation structure has the characteristics of a gravity type foundation and a suction barrel typefoundation, the bearing capacity is improved, and meanwhile, the transportation and installation modes are simple and convenient, the foundation structure can be recycled, and the construction cost isgreatly reduced.

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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