CN201593193U - Space truss type multi-barrel foundation for offshore wind turbines - Google Patents

Abstract

The utility model discloses a space truss type multi-barrel foundation for an offshore wind power unit, which mainly includes a connecting barrel, three suction barrels arranged in a triangle or four suction barrels arranged in a quadrangle, and the number of the suction barrels With the same support column, each suction barrel is fixedly connected to the connecting cylinder through the corresponding support column, and a support member of a truss structure is connected between each support column. The utility model is composed of a space truss system and a plurality of suction barrel foundations to form an integral structure, which converts the overturning load borne by the integral foundation into vertical downward pressure and uplift loads on a single barrel foundation through the support columns and space trusses , making full use of the advantages of barrel-shaped foundations to bear vertical loads, the structural force is reasonable, and can effectively solve the problems of high cost and complex construction of offshore wind turbine foundations.

Description

Space truss type multi-barrel foundation for offshore wind turbines

technical field

The utility model relates to a structural form of an offshore structure foundation, in particular to a structural form of an offshore wind turbine foundation.

Background technique

Most of my country's offshore seabeds are deep and soft soils, and the construction of offshore wind turbines on such foundations poses a great challenge to the selection of foundations. The types of traditional offshore wind turbines are: single pile foundation and group pile foundation. For the single pile foundation, due to its low level and compressive bearing capacity, in order to meet the bearing capacity requirements, the pile foundation needs to be driven into the bearing layer with better bearing conditions, so the pile length is often longer and the cost is higher. Geological conditions are demanding, and special large-scale piling vessels are required for construction, and piling is difficult, which further increases construction costs. For the construction of the offshore concrete cap of the pile group foundation, a temporary construction platform and formwork need to be erected, and the construction process is complicated. In addition, offshore wind turbines are gradually developing towards larger water depth conditions (15-40m), and traditional foundation forms are difficult to meet this requirement. Therefore, it is necessary to seek a new foundation structure with strong resistance to overturning loads of the upper structure, convenient construction, and low cost. form.

Utility model content

The technical problem to be solved by the utility model is to provide a space truss type multi-barrel foundation for offshore wind turbines that can reduce the cost.

The concept of the utility model is: in the marine soft soil, the vertical downward pressure and uplift bearing performance of the suction barrel foundation are good, and the negative pressure construction is also more convenient in the sea. The utility model utilizes the supporting columns and the supporting members of the space truss structure to convert most of the overturning loads of the superstructure into vertical pressing and pulling loads acting on the suction bucket foundation, making them as a whole as a wind turbine Base. The foundation type of the utility model does not need a special piling ship, which reduces the foundation cost. The whole structure bears reasonable force and is suitable for resisting the huge overturning load of the upper structure, especially for large wind turbines under the condition of deep soft soil seabed and large water depth in my country, and the construction difficulty is low.

The technical scheme adopted by the utility model is as follows: the space truss type multi-barrel foundation of the offshore wind turbine mainly includes a connecting barrel, three suction barrels arranged in a triangle or four suction barrels arranged in a quadrangle, and the suction barrel There are support columns with the same number of buckets, and each suction bucket is fixedly connected with the connecting cylinder through the corresponding support columns, and the support members of the truss structure are connected between each support column.

Furthermore, the support column described in the present invention is a hollow structure, and the cavity of the support column is filled with fillers.

Furthermore, a cavity is provided on the top of the lid of the suction bucket according to the utility model, and the cavity of the lid is sealed and communicated with the cavity of the support column, and the cavity of the lid is filled with fillers.

Compared with the prior art, the utility model has the following advantages: (1) Since the suction bucket utilizes negative pressure to carry out sinking, it avoids the complicated problem of offshore construction of the traditional single pile foundation and pile group foundation, and reduces the engineering cost . (2) The utility model is composed of a supporting column, a supporting member of a truss structure and a plurality of suction barrels to form an integral structure, which effectively solves the difficult problem of offshore wind turbine foundation and complicated construction. (3) Taking advantage of the advantages of the suction bucket to bear the vertical load, most of the overturning loads of the wind turbine and other upper structures acting on the connecting cylinder are converted into vertical downward pressure on the suction bucket through the supporting members of the support column and truss structure and uplift loads, so that the structural force is reasonable. (4) Concrete and other fillers are poured into the top of the bucket lid of the suction bucket and the cavity of the hollow support column, which can increase the vertical pressure of the space truss type multi-bucket foundation of the utility model, thereby effectively reducing the pressure of a single suction bucket. The uplifting force of the barrel further improves the overall anti-overturning bearing capacity of the space truss type multi-barrel foundation.

Description of drawings

Fig. 1 is a state schematic diagram (after pouring concrete) of the three-barrel foundation of the present invention after the seabed is installed.

Fig. 2 is a state schematic diagram (after pouring concrete) of the four-barrel foundation of the present utility model after being installed on the seabed.

Fig. 3 is a schematic diagram of the plane layout of the barrel-shaped foundation of the three-barrel foundation.

Fig. 4 is a schematic diagram of the planar layout of the barrel-shaped foundation of the four-barrel foundation.

In the figure: 1. Suction barrel, 2. Support column, 3. Support member of truss structure, 4. Connecting cylinder, 5. Filling material, 6. Sea surface, 7. Seabed, 8. Support frame.

Detailed ways

Further set forth the utility model below in conjunction with accompanying drawing.

Referring to Fig. 1 and Fig. 3, the space truss type multi-barrel foundation of the offshore wind turbine in this embodiment is provided with three suction barrels 1, and the three suction barrels 1 are arranged in a plane triangle, so that the overall barrel-shaped foundation has a relatively good stability. If the three suction barrels 1 are arranged in an equilateral triangle, it can further ensure that the overall barrel-shaped foundation has a stable bearing capacity when subjected to overturning loads in different directions, thereby having better stability.

As shown in FIGS. 1 and 3 , there are three support columns 2 having the same number as the suction barrel 1 . A support frame 8 is fixedly installed on the outer wall of the connecting cylinder 4 . Each suction barrel 1 is fixedly connected to the support frame 8 of the connecting cylinder 4 through a support column 2; a support member 3 of a truss structure is connected between each support column 2 to ensure that the overall barrel-shaped foundation has sufficient rigidity and stability sex. The connecting cylinder 4 is used for connecting the tower of the upper wind turbine.

The support column 2 can be a hollow structure, and the cavity inside it can be used for pouring fillers such as concrete and gravel. Correspondingly, the top of the bucket cover of each suction bucket 1 is also provided with a cavity for pouring concrete, gravel and other fillers. The cavity at the top of the bucket cover of each suction bucket 1 communicates with the cavity of the corresponding support column 2, so that the filler can be poured into the cavity at the top of the bucket cover of the suction bucket 1 through the cavity of the support column 2. In addition, the connection between the two needs to be sealed, so as to prevent seawater from pouring into the cavity at the top of the bung top of the suction bucket 1 and the cavity of the support column 2 .

As shown in FIG. 1 , the top of each support column 2 is exposed to the sea surface 6 to prevent seawater from pouring into the support column 2 . The support column 2 can be a hollow steel pipe.

The utility model utilizes the advantage that the suction bucket 1 bears the vertical load, and converts most of the overturning loads of the wind engine and other superstructures acting on the connecting cylinder 4 to the suction bucket 1 through the support column 2 and the support member 3 of the truss structure. The vertical compression and uplift loads make the structure reasonable. Filling 5 such as concrete or sand in the top of the bucket cover of the suction bucket 1 and the hollow support column 2 can increase the vertical pressure of the space truss type multi-bucket foundation of the utility model, thereby effectively reducing the suction bucket. The uplift force of 1 further improves the anti-overturning bearing capacity of the overall foundation.

As another embodiment of the utility model, the utility model can also be provided with four suction buckets 1 as shown in FIG. 2 , and the four suction buckets 1 are arranged in a quadrangular shape. Similar to the foregoing, if the four suction barrels 1 are arranged in a regular quadrilateral, the stability of the overall barrel-shaped foundation can be further enhanced.

Claims (4)

1. A space truss type multi-barrel foundation for offshore wind turbines, characterized in that it includes a connecting barrel, three suction barrels arranged in a triangle or four suction barrels arranged in a quadrangle, and the number of suction barrels With the same support column, each suction barrel is fixedly connected to the connecting cylinder through the corresponding support column, and a support member of a truss structure is connected between each support column. 2. The space truss-type multi-barrel foundation of an offshore wind turbine according to claim 1, wherein the triangle is a regular triangle, and the quadrilateral is a regular quadrilateral. 3. The space truss-type multi-barrel foundation for offshore wind turbines according to claim 1 or 2, characterized in that: the support column is a hollow structure, and fillers are poured into the cavity of the support column. 4. The space truss type multi-barrel foundation for offshore wind turbines according to claim 3, characterized in that: the top of the barrel cover of the suction barrel is provided with a cavity, and the cavity of the barrel cover and the cavity of the support column It is sealed and communicated, and the cavity of the barrel cover is filled with filler.

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