Gravity type offshore wind power foundation capable of towing in self-floating mode and construction method thereof

Abstract

A gravity type offshore wind power foundation capable of towing in a self-floating mode is composed of a connecting section, a foundation body, an inner loading heap and outer loading heaps. The foundation body comprises a reinforced concrete conical barrel, a bottom plate, a side wall and ribbed plates. The bottom of the conical barrel is placed at the center of the bottom plate, the side wall is placed on the edge of the circular bottom plate, and the ribbed plates are evenly and radially distributed in an annular space between the conical barrel and the side wall. The bottom plate is fixedly connected with a rock foundation in a grouting manner. The inner loading heap is filled into the conical barrel, and the outer loading heaps are filled into cavities formed among the side wall, the ribbed plates and the bottom plate. Prestressed reinforcing steel bars are arranged both inside the conical barrel and the cylindrical wall of the connecting section, and the conical barrel and the connecting section are connected to be a whole through concrete deposit. The top of a reinforced concrete cylinder of the connecting section is connected with a fan tower barrel through a flange. The gravity type offshore wind power foundation has the advantages of being novel in structure, convenient to construct, fast in prefabricated installation, capable of conducting towing operation in the self-floating mode, short in construction period, large in control capacity, capable of obviously lowering construction cost and reducing construction project amount, and good in economy and applicability.

Description

technical field [0001] The invention relates to an offshore wind power foundation structure type and a construction method thereof, in particular to a gravity type offshore wind power foundation capable of self-floating towage and a construction method thereof. Background technique [0002] In recent years, offshore wind power has developed rapidly in countries all over the world, but the offshore environment is complex and changeable, and the flexibility and adaptability of foundation construction have attracted more and more attention from wind power developers. At this stage, offshore wind power foundations mainly include single pile foundation, multi-pile foundation, gravity foundation, cylindrical foundation and floating foundation. Among them, single pile foundation and gravity foundation are the most used. The gravity foundation maintains a stable structure with its own weight, and is simple in design and easy to manufacture in batches. It is generally suitable for s...

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Problems solved by technology

[0003] However, the currently used gravity foundation has significant defects in construction. For the gravity foundation that cannot be towed, the structure itself has a large weight and high manufacturing cost. Generally, the construction method can only be hoisting, which is difficult and dangerous. high performance, poor safety and high cost; and for towable gravity foundations, auxiliary floating equipment such as air flotation tanks are generally required, but manufacturing additional floating equipment will increase the cost of foundation construction and increase the engineering of foundation construction quantity

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