Offshore wind power single-pile composite winged gravity type foundation and construction method thereof

Abstract

The invention discloses an offshore wind power single-pile composite winged gravity type foundation and a construction method thereof. The offshore wind power single-pile composite winged gravity type foundation comprises a gravity type foundation body and a single pile. According to the offshore wind power single-pile composite winged gravity type foundation and the construction method thereof, the single pile and the gravity type foundation body with the bottom provided with wing plates are connected into a whole through the high-strength grouting material, the overall rigidity of the structure is enhanced, high vertical bearing capacity, horizontal bearing capacity, anti-overturning bearing capacity and anti-torsion capacity are achieved, the requirements for the length and the wall thickness of the single pile foundation under the complex marine environment condition can be effectively reduced, and therefore, high piling cost caused by the fact that the pile is too large in diameter and too long in length is saved while a large amount of steel is saved. According to the combined structure foundation, the application range of the single pile and the gravity type foundation body is widened, and the combined structure foundation can be installed and used under the complex ocean condition.

Description

technical field [0001] The invention belongs to the field of offshore wind power foundation structures, and in particular relates to an offshore wind power single pile composite winged gravity foundation and a construction method thereof. Background technique [0002] As a clean and green energy source, offshore wind power has attracted more and more attention. Since the world's first offshore wind farm was built in Denmark in 1991, the development and utilization of offshore wind energy has become a hot spot for experts and scholars. One of the most important factors restricting offshore wind power generation is the construction of the basic form. Offshore wind turbine structures are subject to horizontal loads, moment loads, and cyclic loads from wind, waves, and current loads. Therefore, the design of wind turbine foundations should focus on the stability of the foundation structure under various complex effects. [0003] At present, the most widely used is the single pi...

AI Technical Summary

Problems solved by technology

The main structure is usually a gravity disc, which has better anti-overturning and anti-sliding capabilities, but the gravity foundation has strict requirements on natural foundations, and is not suitable for soft soil foundations. Under the influence of seawater erosion, it is easy to cause the bottom Sliding, thereby affecting its mechanical performance

[0005] In view of the above-mentioned mechanical problems of offshore wind power foundations, for a single foundation in existing projects, the diameter and length of the single pile are often increased to resist large horizontal and moment loads, which will also increase the utility of the single pile foundation. Steel quantity, while increasing piling cost

For the gravity foundation, the diameter and mass of the disk are usually increased to increase the anti-sliding force and anti-overturning ability, thereby expanding the scope of application of the foundation, but this also increases the cost of the foundation and increases the offshore load. The cost of transportation and installation

During long-term work, the wind power foundation not only suffers horizontal and bending moment loads caused by cyclic loads such as wind waves and currents, but also bears torque caused by non-coplanar loads. When the size of the wind power foundation is large, it will suffer torsion damage due to the torque load The possibility of increasing, the current damage form of this force, has not yet been reasonably solved in the research of basic structure

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