CN212358365U

CN212358365U - Offshore wind turbine supporting structure

Info

Publication number: CN212358365U
Application number: CN202020855795.5U
Authority: CN
Inventors: 崔文涛; 袁新勇; 逯鹏; 张清涛; 郭小亮; 李健; 茹洋洋; 鲁成林; 赵迎九
Original assignee: Huadian Heavy Industries Co Ltd
Current assignee: Huadian Heavy Industries Co Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-01-15
Anticipated expiration: 2030-05-20

Abstract

The utility model discloses an offshore wind turbine supporting structure, which comprises a supporting foundation and a first jacket, wherein the supporting foundation is used for sinking to the water bottom and then is assembled above the first jacket after sinking to the water bottom; the supporting foundation is of an integral structure and comprises a suction tube and a second jacket arranged above the suction tube, and the first jacket and the second jacket are spliced and grouted fixedly. In this bearing structure work progress, can divide twice hoist and mount support basis and first jacket, so hang high and hang heavy requirement low to offshore construction equipment, moreover, this bearing structure's support basis and first jacket can be built at the place of difference respectively, so low to the requirement of building the place, the building place that satisfies the requirement is many, therefore, can set up a plurality of building places and carry out the construction of support basis and first jacket, consequently, can improve or even avoid completely and can not catch up with the problem that offshore construction progress leads to offshore constructor nest because of the component speed of building.

Description

Offshore wind turbine supporting structure

Technical Field

The utility model relates to an offshore wind turbine technical field especially relates to offshore wind turbine bearing structure.

Background

In recent years, wind farms are gradually expanded to offshore deepwater areas, and when the wind farms are built in the offshore deepwater areas, the offshore wind turbine support structures are built by using jackets and suction tubes.

The construction process comprises the following steps: the jacket and the suction barrel are built at a building site and are built into a whole to form an integral structure, the integral structure is transported to a marine construction site by the transporting equipment, and the integral structure is lifted and is sunk to the water bottom by the marine construction equipment.

This kind of offshore wind turbine bearing structure has following drawback:

(1) the height of the integral structure formed by the jacket and the suction tube is generally between 60 and 70m, the structure weight is generally between 1400 tons and 2600 tons, and the requirements on construction sites, transportation equipment and offshore operation equipment are high due to the high height and heavy weight;

(2) due to the fact that the requirement for the construction site is high, the required construction site is few, the construction speed of the member cannot catch up with the offshore construction progress, and the offshore construction is complicated.

(3) Due to the high requirements on transportation equipment and offshore operation equipment, special transportation equipment and offshore operation equipment are required to be adopted for transportation and installation, and the construction cost of a wind field is high.

In view of the above, if the above disadvantages are avoided, the technical problem to be solved by the technical personnel in the field is.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an offshore wind turbine supporting structure, which comprises a supporting foundation and a first jacket, wherein the supporting foundation is used for sinking to the bottom of the sea and then is assembled above the first jacket after sinking to the bottom of the sea; the supporting foundation is of an integrated structure and comprises a suction tube and a second jacket arranged above the suction tube, and the first jacket and the second jacket are spliced, grouted and fixed.

In the construction process of the supporting structure, the supporting foundation and the first jacket can be hoisted twice, compared with the integral structure hoisted once in the background art, the supporting foundation and the first jacket are lower in height and weight than the integral structure, so that the hoisting height and hoisting weight requirements on offshore construction equipment are low, and common offshore construction equipment can be selected for construction, so that the offshore construction cost is low.

Moreover, the supporting foundation and the first jacket of the supporting structure can be built in different places respectively, so that the requirement on the building place is low, the building place meeting the requirement is more, therefore, a plurality of building places can be arranged for building the supporting foundation and the first jacket, and the problem that the offshore construction is unsmooth due to the fact that the construction speed of the member cannot catch up with the offshore construction progress can be improved or even completely avoided.

Optionally, the first jacket and the second jacket each include a plurality of longitudinal main legs, a support rod is disposed between the main legs, and two ends of the support rod are connected to different main legs. With this arrangement, the strength of the first jacket and the second jacket is relatively high.

Optionally, an insert leg is respectively arranged below each main leg of the first jacket, and the insert legs are inserted into the main legs of the second jacket in a one-to-one correspondence manner.

Optionally, the bottom of the main leg of the first jacket is thickened to form a thickened portion, the outer diameter of the thickened portion being the same as the outer diameter of the spigot leg to which it is attached.

Optionally, the outrigger and the main leg of the second jacket are both straight legs extending in a vertical direction. The arrangement is convenient for the insertion of the insertion leg and the main leg of the second jacket.

Optionally, the legs of the first jacket are of different lengths, so that the bottom ends of the legs are higher and lower. Thus, the plugging of the plugging leg and the second jacket is facilitated.

Optionally, the first jacket is higher than the second jacket to which it is connected.

Optionally, the second jackets are provided in a plurality of sizes having different heights, and the second jackets of different sizes can be plugged with the same first jacket. With the arrangement, all the supporting structures of one wind field can adopt the same first jacket, so that the workload of production design can be reduced, and the efficiency of material preparation and construction of the structure can be improved.

Drawings

Fig. 1 is a schematic view of a specific embodiment of an offshore wind turbine support structure provided by the present invention;

FIG. 2 is a schematic view of the first jacket of FIG. 1;

fig. 3 is a schematic view of the support base of fig. 1.

The reference numerals are explained below:

1 supporting base, 11 second guide pipe frame and 12 suction tube;

2 a first jacket;

a main leg, b supporting rod, c inserting leg and d transition section.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following provides a detailed description of the technical solution of the present invention with reference to the accompanying drawings.

As shown, the offshore wind turbine support structure (hereinafter referred to as support structure) includes a first jacket 2 and a support foundation 1.

The support foundation 1 is of unitary construction. The supporting foundation 1 comprises a second jacket 11 and a suction tube 12, the second jacket 11 is fixed above the suction tube 12, and after the installation is completed, the first jacket 2 and the second jacket 11 are mutually inserted and fixed in a grouting mode.

The construction method of the support structure comprises the following steps:

s1, hoisting the supporting foundation 1 and sinking to the water bottom;

s2, hoisting the first jacket 2 to the position right above the second jacket 11, and then lowering the first jacket 2 to enable the first jacket 2 to be spliced with the second jacket 11;

s3, grouting is performed at the insertion position of the first jacket 2 and the second jacket 11 to fix the first jacket 2 and the second jacket 11.

In the construction process, the supporting foundation 1 and the first jacket 2 are hoisted twice, compared with a one-time hoisting integral structure in the background art, the height and the weight of the supporting foundation 1 and the first jacket 2 are smaller than those of the integral structure, so that the hoisting height and the hoisting weight of offshore construction equipment are low, and common offshore construction equipment can be selected for construction, so that the offshore construction cost is low.

Moreover, this bearing structure's supporting foundation 1 and first jacket 2 can be built at different places respectively, so low to the requirement of building the place, and the building place that satisfies the requirement is many, therefore, can set up a plurality of building places and carry out the construction of supporting foundation 1 and first jacket 2, consequently, can improve or even avoid completely because of the component construction speed can not catch up with the marine construction progress and lead to the problem of marine construction worker's nest.

In particular, the first jacket 2 comprises a plurality of longitudinal main legs a, preferably three or four. The top of the main leg a of the first jacket 2 is provided with a transition section d for supporting a fan. In the illustrated embodiment, the main leg a of the first jacket 2 is a slant leg having a top inclined toward the vertical center line of the first jacket 2, so that the stability of the first jacket 2 is improved.

An inserting leg c is respectively arranged below each main leg a of the first jacket 2. In the illustrated scheme, the bottom of the main leg a of the first jacket 2 is thickened to form a thickened portion, and the outer diameter of the thickened portion is substantially consistent with the outer diameter of the inserting leg c arranged below the thickened portion, so that the strength of the transition position of the main leg a and the inserting leg c of the first jacket 2 can be ensured, and the thickened portion is not required in actual implementation.

The second jacket 11 also comprises a plurality of longitudinal main legs a, the number of main legs a of the second jacket 11 corresponding to the number of main legs a of the first jacket 2. The insert legs c are inserted into the main legs a of the second jacket 11 in a one-to-one correspondence. In the illustrated embodiment, the plug leg c and the main leg a of the second jacket 11 are straight legs extending in the vertical direction, so as to facilitate the plugging of the two.

The legs c of the first jacket 2 may be arranged in different lengths so that the bottom ends of the legs c have different heights. In fig. 2, the bottom end of the left leg c is lower than the bottom end of the right leg c, which facilitates the mating of the first jacket 2 and the second jacket 11. In detail, when three inserting legs c are arranged, one inserting leg c is longer than the other two inserting legs c, but the length of the other inserting leg c is shorter than the other inserting leg c, so that the three inserting legs c have two lengths; when four inserting legs c are arranged, two inserting legs c on the first diagonal line are designed to be long and short, two inserting legs c on the second diagonal line are designed to be the same in length, but the length of the two inserting legs c is smaller than that of the two inserting legs c on the first diagonal line, and therefore the four inserting legs c have three lengths.

A suction tube 12 is arranged below each main leg a of the second jacket 11, the top of each suction tube 12 is sealed by a sealing plate, the bottom of each suction tube is open, when the supporting foundation 1 is sunk, a pump prying block is used for pumping water from the inside of each suction tube, and after the supporting structure reaches the service life, the water is injected into each suction tube, so that the whole supporting structure can be ejected out of the water surface. The suction tube 12 is used as a part of the supporting base 1, which facilitates the installation of the supporting base 1 and the disassembly of the supporting base 1. After the suction tube 12 is installed, the wall of the tube penetrates below a mud surface, the top sealing plate is positioned at the upper part of the mud surface, and the specification of the suction tube 12 is determined by the load on the suction tube 12 and the geological conditions of a wind field.

Support rods b are arranged between the main legs a of the first jacket 2 and between the main legs a of the second jacket 11, and two ends of each support rod b are connected with different support legs to play a role in connecting the main legs a and improving the strength of the jacket.

In the scheme of the figure, the supporting rod b is an inclined supporting rod which forms a certain included angle with the vertical direction and the horizontal direction, and the supporting rod b is crossed in pairs to form an X-shaped structure, so that the supporting rod b can well play a role in improving the strength of the jacket.

In the illustrated embodiment, the first jacket 2 is provided with three layers of support bars b, and the second jacket 11 is provided with one layer of support bars b, with the support bars b being located at substantially the same height as one layer. In practical implementation, the number of layers of the supporting rod b can be flexibly adjusted according to the length of the main leg a. Preferably, the first jacket 2 is made to have a height of between 30m and 50m and two or three layers of support bars b are provided between its main legs a, and the second jacket 11 is made to have a height of between 15m and 20m and one or two layers of support bars b are provided between its main legs a.

Specifically, the second jackets 11 may be provided in a plurality of sizes having different heights, and the number of the main legs a and the pitch of the main legs a of the second jackets 11 having different sizes are the same so as to be able to be plugged with the same first jacket 2. With this arrangement, all the supporting structures of one wind field can use the same first jacket 2, which can reduce the workload of production design and improve the efficiency of material preparation and construction of the structure. When the same first jacket 2 is adopted in one wind field, the second jacket 11 with higher height is adopted at the position with deeper water depth, and the second jacket 11 with lower height is adopted at the position with shallower water depth, so that the height of the supporting structure can be ensured to meet the water depth requirement.

It is right above the utility model provides an offshore wind turbine bearing structure and offshore wind turbine bearing structure's construction method has carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. Offshore wind turbine support structure, characterized by comprising a support foundation (1) for sinking to the water bottom, and a first jacket (2) for being assembled above the support foundation (1) after sinking to the water bottom; the supporting foundation (1) is of an integral structure, the supporting foundation (1) comprises a suction tube (12) and a second jacket (11) arranged above the suction tube (12), and the first jacket (2) and the second jacket (11) are spliced, grouted and fixed.

2. Offshore wind turbine support structure according to claim 1, characterized in that the first jacket (2) and the second jacket (11) each comprise a plurality of longitudinal main legs (a), between which a support bar (b) is arranged, the two ends of which connect different main legs (a).

3. Offshore wind turbine support structure according to claim 2, characterized in that one insert leg (c) is provided below each main leg (a) of the first jacket (2), said insert legs (c) being inserted inside the main legs (a) of the second jacket (11) in a one-to-one correspondence.

4. Offshore wind turbine support structure according to claim 3, characterized in that the bottom of the main leg (a) of the first jacket (2) is thickened forming a thickening having an outer diameter corresponding to the outer diameter of the spigot leg (c) connected thereto.

5. Offshore wind turbine support structure according to claim 3, characterized in that the outrigger (c) and the main leg (a) of the second jacket (11) are both straight legs extending in a vertical direction.

6. Offshore wind turbine support structure according to claim 5, characterized in that the legs (c) of the first jacket (2) are of different length, such that the bottom end of each leg (c) is higher or lower.

7. Offshore wind turbine support structure according to any of claims 1-6, characterized in that the first jacket (2) has a higher height than the second jacket (11) connected thereto.

8. Offshore wind turbine support structure according to any of the claims 1-6, characterized in that the second jacket (11) is provided in several sizes with different heights, the second jacket (11) of different sizes being able to be plugged with the same first jacket (2).