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Towing truss-gravity type combined offshore wind turbine foundation structure and construction method thereof

A technology of gravity foundation and offshore wind turbine, which is applied in the direction of foundation structure engineering, construction, etc., can solve the problems of difficult application of pile foundation type, influence of marine organisms, high consumption of steel materials, etc., so as to avoid easy overturning, reduce offshore construction, and structural rigidity big effect

Inactive Publication Date: 2017-05-10
POWERCHINA HUADONG ENG COPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the truss foundation is connected to the seabed foundation through steel pipe piles. In order to meet the requirements of the anti-overturning moment within the design life, the structural parameters such as pile diameter, pile length, and pile spacing are relatively large, and the consumption of steel is large, and the cost is high. Noise will be generated during the process, which will affect marine organisms; moreover, for hard sandy soil and rock foundations, such as the coastal areas of Fujian, my country, it is difficult to drive piles, and the pile foundation type is difficult to apply

Method used

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  • Towing truss-gravity type combined offshore wind turbine foundation structure and construction method thereof
  • Towing truss-gravity type combined offshore wind turbine foundation structure and construction method thereof
  • Towing truss-gravity type combined offshore wind turbine foundation structure and construction method thereof

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Embodiment 1

[0028] Embodiment 1, as shown in the figure, is a towable truss-gravity combined offshore wind turbine foundation structure.

[0029] This embodiment is a towable truss-gravity combination offshore wind turbine foundation structure applied to offshore wind power, including: a gravity foundation with a cavity that can be towed and a truss wind turbine support structure. The gravity foundation includes a pre-buried There are concrete piers 2 and concrete cavities 3 connected to steel pipes 1, the truss fan support structure 4 is connected to the pre-embedded butt steel pipe 1 through grouting material 5, and the gravity foundation and truss fan structure are connected into one As a whole, as the foundation of offshore wind turbines, it supports the upper wind turbine structure.

[0030] The butt steel pipes (1) are steel pipes of equal diameter, the diameter of which is larger than that of the main legs of the truss fan support structure (4), and the number of the butt steel pip...

Embodiment 2

[0038] Embodiment 2, split type construction method.

[0039] Present embodiment is directed at the construction method under the first situation in embodiment 1, and its concrete construction steps are as follows:

[0040] a. Make a gravity foundation and a truss fan support structure on land respectively.

[0041] b. Clean up the seabed of the wind turbine stand, including seabed leveling and foundation laying of crushed stone cushion.

[0042] c. According to the equipment conditions of the wharf, the well-cured gravity concrete foundation can be hoisted into the sea by means of crane or air bag rolling into the water, and the whole gravity concrete foundation will be self-floating on the sea surface by relying on the buoyancy of the cavity; then use The tugboat will tow the gravity concrete foundation to the corresponding machine position of the wind farm, and slowly inject water into the cavity to make the gravity foundation sink to the seabed; Full of rocks.

[0043] ...

Embodiment 3

[0044] Embodiment 3, monolithic construction method.

[0045] The present embodiment is directed at the construction method under the second situation in embodiment 1, and its concrete construction steps are as follows:

[0046] a. Make a gravity foundation and a truss fan support structure on land respectively.

[0047] b. Clean up the seabed of the wind turbine stand, including seabed leveling and foundation laying of crushed stone cushion.

[0048] c. Make the truss-type fan support structure 4 and the prefabricated cavity gravity concrete foundation respectively on land, and then insert the prepared truss-type fan support structure 4 into the pre-embedded butt joint steel pipe 1 of the concrete pier 2 on the wharf, and pass The grouting makes the truss fan support structure 4 and the cavity gravity foundation integral to support the upper fan.

[0049] d. According to the equipment conditions of the wharf, the truss-gravity combined offshore wind turbine foundation can b...

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Abstract

The invention provides a towing truss-gravity type combined offshore wind turbine foundation structure. The foundation structure comprises a towing gravity type foundation with a cavity and a truss-type fan supporting structure; the towing gravity type foundation comprises a concrete abutment where butt-joint steel pipes are embedded in advance and a concrete cavity, and the truss-type fan supporting structure is connected with the pre-embedded butt-joint steel pipes through a grouting material. The invention further provides a construction method of a towing truss-gravity type combined offshore wind turbine foundation. The foundation structure can be applied to an offshore wind plant with the water depth of 20-50 m and the subgrade made of hard sandy oil or rock and has the advantages of being suitable for larger water depth, capable of supporting a fan with larger capacity and convenient to install and transport, saving steel and reducing construction cost, wave force borne by the foundation structure is reduced, and piling and piling noise are avoided.

Description

technical field [0001] The invention relates to a towable truss-gravity combined offshore fan foundation structure and a construction method thereof, belonging to the technical field of offshore wind power engineering. Background technique [0002] As a basic type of offshore wind turbine, the gravity foundation relies on its own weight to make the wind turbine stand vertically on the sea surface. It has high requirements for the foundation and is suitable for hard sand or rock foundations. However, the applicable water depth of the traditional gravity foundation type is limited, generally only in shallow water areas; and due to the large size of the traditional gravity foundation type, the wave has a greater force on the foundation structure, which restricts the application of the gravity type foundation type. [0003] With the continuous development of offshore wind power in my country, offshore wind power is gradually developing into deeper sea areas, and the wind and wav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/42
CPCE02D27/425
Inventor 潘祖兴吴关叶赵生校周永罗金平周胡
Owner POWERCHINA HUADONG ENG COPORATION LTD
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