Enclosure and Lower Foundation Structure of Wind Power Platform and Its Installation Method

Abstract

The present invention relates to the technical field of the hoisting of the cofferdam of a wind power platform, and discloses a cofferdam and a lower foundation structure of a wind power platform and an installation method thereof. The cofferdam and the lower foundation structure include a first cofferdam, a second cofferdam, a fourth cofferdam, a fifth cofferdam, a first lower foundation, a second lower foundation and a third lower foundation; fixing points are arranged between the cofferdam and the lower foundation as fixing structures, so that the cofferdam and the lower foundation are convenient to position during hoisting, and can be well fixed after hoisting, ensuring the hoisting quality and fixing effect of the lower foundation and the cofferdam of the wind power platform. This method combines the characteristics that the division between the cofferdam and the lower foundation segments is in an inlaid form rather than a flush form, ensuring the production integrity of each part of the lower foundation segments, and also fully considering the ability of the segments to be removed from the mold in the indoor workshop. Under the premise of multiple structural concavities and convexities and embeddings, the in-place hoisting of the segments is realized, ensuring the hoisting quality and fixing effect of the lower foundation and the cofferdam of the wind power platform.

Description

Technical Field

[0001] The present invention relates to the technical field of the hoisting of the cofferdam of a wind power platform, and particularly to a cofferdam and a lower foundation structure of a wind power platform and an installation method thereof. Background Art

[0002] In the conventional wind power platform, the cofferdam area is divided into a total section, which is composed of N cofferdam sub-sections + a lower foundation, and is hoisted and carried as a whole after overall assembly. When the cofferdam area is relatively large and the weight exceeds the lifting limit of a gantry crane of 900 tons, it is difficult to perform overall hoisting. When hoisting and carrying are carried out separately, there is a lack of a connection structure between the cofferdam and the lower foundation, resulting in a lack of fixed cooperation between the cofferdam and the lower foundation. Therefore, it is relatively difficult to fix and position during the construction of the cofferdam and the lower foundation, and there is also a lack of a fixing method after the construction is completed, and the structures are prone to floating. Summary of the Invention

[0003] The purpose of the present invention is to provide a cofferdam and a lower foundation structure of a wind power platform and an installation method thereof. Fixed points are provided between the cofferdam and the lower foundation as a fixing structure, so that the cofferdam and the lower foundation are convenient to position during hoisting, and can be well fixed after hoisting is completed, ensuring the hoisting quality and fixing effect of the lower foundation and the cofferdam of the wind power platform.

[0004] In order to achieve the above purpose, the present invention provides a cofferdam and a lower foundation structure of a wind power platform, including:

[0005] A first cofferdam and a second cofferdam which are symmetrically arranged, and a first fixing point and a second fixing point are respectively arranged on the opposite side end faces of the first cofferdam and the second cofferdam;

[0006] A first lower foundation, which is arranged between the first cofferdam and the second cofferdam, and both ends of the first lower foundation are respectively connected to the first cofferdam and the second cofferdam. Third fixing points are arranged at both ends of the first lower foundation, and the third fixing points are respectively matched with the first fixing point and the second fixing point;

[0007] A fourth cofferdam and a fifth cofferdam which are symmetrically arranged and connected to each other, the fourth cofferdam is connected to the second cofferdam, the fifth cofferdam is connected to the first cofferdam, and a fourth fixing point and a fifth fixing point are respectively arranged on the fourth cofferdam and the fifth cofferdam;

[0008] A second lower foundation and a third lower foundation which are symmetrically arranged, the second lower foundation is fixedly connected to the fourth cofferdam through the fourth fixing point, and the third lower foundation is fixedly connected to the fifth cofferdam through the fifth fixing point.

[0009] In an embodiment of the present invention, a cofferdam and a lower foundation structure of a wind power platform have the following beneficial effects: By providing a first fixing point and a third fixing point that cooperate with each other between the first cofferdam and the first lower foundation, the fixing between the first cofferdam and the first lower foundation is completed. By providing a second fixing point and a third fixing point that cooperate with each other between the second cofferdam and the first lower foundation, the fixing between the second cofferdam and the first lower foundation is completed. By providing a fourth fixing point between the fourth cofferdam and the second lower foundation, the fixing between the fourth cofferdam and the second lower foundation is completed. By providing a fifth fixing point between the fifth cofferdam and the third lower foundation, the fixing between the fifth cofferdam and the third lower foundation is completed. In the present application, fixing points are provided between the cofferdam and the lower foundation as a fixing structure, which facilitates positioning during the hoisting process of the cofferdam and the lower foundation, and can obtain good fixing after the hoisting is completed, ensuring the hoisting quality and fixing effect of the lower foundation and the cofferdam of the wind power platform.

[0010] In the cofferdam and lower foundation structure of the wind power platform according to an embodiment of the present invention, the first fixing point and the second fixing point include a protruding portion, and the third fixing point includes a first extension plate that cooperates with the protruding portion. When the first cofferdam, the second cofferdam, and the first lower foundation are fixed, the extension plate abuts against the lower part of the protruding portion.

[0011] In the cofferdam and lower foundation structure of the wind power platform according to an embodiment of the present invention, the fourth fixing point and the fifth fixing point include a second extension plate extending in the direction towards the second lower foundation and the third lower foundation, and the bottom surfaces of the second lower foundation and the third lower foundation respectively abut against the second extension plate.

[0012] In the cofferdam and lower foundation structure of the wind power platform according to an embodiment of the present invention, dock piers and round pipes are provided at the bottoms of the first cofferdam, the second cofferdam, the fourth cofferdam, and the fifth cofferdam for support.

[0013] In the cofferdam and lower foundation structure of the wind power platform according to an embodiment of the present invention, a total of three hook lifting points are provided on the fourth cofferdam and the second lower foundation.

[0014] In the cofferdam and lower foundation structure of the wind power platform according to an embodiment of the present invention, a total of three hook lifting points are provided on the fifth cofferdam and the third lower foundation.

[0015] The present invention also provides an installation method for a cofferdam and lower foundation structure of a wind power platform, including the following steps:

[0016] Hoist the first cofferdam to the designated position;

[0017] Hoist the first lower foundation to one side of the first cofferdam, and fix the third fixing point on the first lower foundation in cooperation with the first fixing point on the first cofferdam;

[0018] Lift the second cofferdam to the side of the first lower foundation facing away from the first cofferdam, and fix the second fixing point on the second cofferdam in cooperation with the third fixing point on the side of the first lower foundation facing away from the first cofferdam;

[0019] Lift the fourth cofferdam and the second lower foundation, and fix the fourth cofferdam and the second lower foundation in cooperation through the fourth fixing point on the fourth cofferdam;

[0020] Lift the fourth cofferdam and the second lower foundation together and connect them to one side of the second cofferdam;

[0021] Lift the fifth cofferdam and the third lower foundation, and fix the fifth cofferdam and the third lower foundation in cooperation through the fifth fixing point on the fifth cofferdam;

[0022] Lift the fifth cofferdam and the third lower foundation together and connect them to one side of the first cofferdam.

[0023] The installation method of the cofferdam and lower foundation structure of a wind power platform according to an embodiment of the present invention has the beneficial effects that: combining the characteristics that the division between the cofferdam and the lower foundation segments is in an inlaid rather than flush form, ensuring the production integrity of each part of the lower foundation segments, and fully considering the ability of the indoor workshop segments to be removed from the mold. Under the premise that there are structural concavities and convexities embedded in many places, the in-place of segmental hoisting is realized, ensuring the hoisting quality and fixing effect of the lower foundation and cofferdam of the wind power platform.

[0024] In the step of fixing the third fixing point on the first lower foundation in cooperation with the first fixing point on the first cofferdam in the installation method of the cofferdam and lower foundation structure of the wind power platform according to an embodiment of the present invention, it further includes: first hoist and translate the first lower foundation to below the first fixing point to align the third fixing point and the first fixing point, and then raise the first lower foundation so that the third fixing point abuts against the first fixing point.

[0025] In the installation method of the cofferdam and lower foundation structure of the wind power platform according to an embodiment of the present invention, when hoisting the fourth cofferdam and the second lower foundation, it includes the following steps: hoist the fourth cofferdam to a position at least 100 mm away from the second cofferdam, and then hoist the second lower foundation to one side of the fourth cofferdam and fix it in cooperation with the fourth cofferdam.

[0026] In the installation method of the cofferdam and lower foundation structure of the wind power platform according to an embodiment of the present invention, when hoisting the fifth cofferdam and the third lower foundation, it includes the following steps: hoist the fifth cofferdam to a position at least 100 mm away from the first cofferdam, and then hoist the third lower foundation to one side of the fifth cofferdam and fix it in cooperation with the fifth cofferdam.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the cofferdam and the lower foundation structure of the wind power platform according to an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of the first cofferdam in the cofferdam and the lower foundation structure of the wind power platform according to an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of the third lower foundation in the cofferdam and the lower foundation structure of the wind power platform according to an embodiment of the present invention;

[0031] In the figure, 1 is the first cofferdam; 11 is the first fixing point; 2 is the second cofferdam; 3 is the first lower foundation; 31 is the third fixing point; 4 is the fourth cofferdam; 5 is the fifth cofferdam; 6 is the second lower foundation; 7 is the third lower foundation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0034] In the description of the present invention, the meaning of several is one or more, the meaning of a plurality is two or more, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0036] AsFigure 1 , Figure 2 and Figure 3 As shown in Figure 1 , Figure 2 and Figure 3 , a cofferdam and lower foundation structure of a wind power platform according to a preferred embodiment of the present invention includes a first cofferdam 1, a second cofferdam 2, a fourth cofferdam 4, a fifth cofferdam 5, a first lower foundation 3, a second lower foundation 6 and a third lower foundation 7.

[0037] Among them, the first cofferdam 1 and the second cofferdam 2 are symmetrically arranged. The main deck of the first cofferdam 1 is connected to the main hull using 4 positioning sealing rows, and the main deck of the second cofferdam 2 is connected to the main hull using 2 positioning sealing rows; the first cofferdam 1 and the second cofferdam 2 have the same shape. On the opposite side end faces of the first cofferdam 1 and the second cofferdam 2, a first fixing point 11 and a second fixing point are respectively provided. The first fixing point 11 and the second fixing point have the same shape and are oppositely arranged;

[0038] The first lower foundation 3 is arranged between the first cofferdam 1 and the second cofferdam 2 for connecting and fixing the first cofferdam 1 and the second cofferdam 2. The two ends of the first lower foundation 3 are respectively connected to the first cofferdam 1 and the second cofferdam 2. Third fixing points 31 are provided at both ends of the first lower foundation 3, and the third fixing points 31 are respectively matched with the first fixing point 11 and the second fixing point;

[0039] The fourth cofferdam 4 and the fifth cofferdam 5 are symmetrically arranged and connected to each other. The main deck of the fourth cofferdam 4 is connected to the main hull using 2 positioning sealing rows, and the main deck of the fifth cofferdam 5 is connected to the main hull using 2 positioning sealing rows; the fourth cofferdam 4 is connected to the second cofferdam 2, the fifth cofferdam 5 is connected to the first cofferdam 1, and a fourth fixing point and a fifth fixing point are respectively provided on the fourth cofferdam 4 and the fifth cofferdam 5;

[0040] The second lower foundation 6 and the third lower foundation 7 are symmetrically arranged. The second lower foundation 6 and the third lower foundation 7 respectively serve as the foundation structures of the fourth cofferdam 4 and the fifth cofferdam 5. The second lower foundation 6 is fixedly connected to the fourth cofferdam 4 through the fourth fixing point, and the third lower foundation 7 is fixedly connected to the fifth cofferdam 5 through the fifth fixing point.

[0041] In the present invention, by providing a mutually cooperating first fixing point 11 and a third fixing point 31 between the first cofferdam 1 and the first lower foundation 3, the fixing between the first cofferdam 1 and the first lower foundation 3 is completed. By providing a mutually cooperating second fixing point and a third fixing point 31 between the second cofferdam 2 and the first lower foundation 3, the fixing between the second cofferdam 2 and the first lower foundation 3 is completed. By providing a fourth fixing point between the fourth cofferdam 4 and the second lower foundation 6, the fixing between the fourth cofferdam 4 and the second lower foundation 6 is completed. By providing a fifth fixing point between the fifth cofferdam 5 and the third lower foundation 7, the fixing between the fifth cofferdam 5 and the third lower foundation 7 is completed. In the present application, fixing points are provided between the cofferdams and the lower foundations as fixing structures, facilitating positioning during the hoisting process of the cofferdams and the lower foundations, and enabling good fixing after hoisting is completed, ensuring the hoisting quality and fixing effect of the lower foundation and the cofferdams of the wind power platform.

[0042] In some embodiments of the present invention, the first fixing point 11 and the second fixing point include protruding portions that protrude from the first cofferdam 1 and the second cofferdam 2. The third fixing point 31 includes a first extension plate that cooperates with the protruding portions. When the first cofferdam 1, the second cofferdam 2, and the first lower foundation 3 are fixed, the extension plate abuts against the lower part of the protruding portion, causing the first cofferdam 1, the second cofferdam 2, and the first lower foundation 3 to form a lapped structure, with a stable form and a stable state.

[0043] In some embodiments of the present invention, the fourth fixing point and the fifth fixing point include second extension plates that extend towards the second lower foundation 6 and the third lower foundation 7. The bottom surfaces of the second lower foundation 6 and the third lower foundation 7 respectively abut against the second extension plates, causing a lapped structure to be formed between the fourth cofferdam 4 and the second lower foundation 6 and between the fifth cofferdam 5 and the third lower foundation 7, making the fixing between the fourth cofferdam 4 and the second lower foundation 6 and between the fifth cofferdam 5 and the third lower foundation 7 more reliable and the state more stable.

[0044] In some embodiments of the present invention, dock piers and round tubes are provided at the bottoms of the first cofferdam 1, the second cofferdam 2, the fourth cofferdam 4, and the fifth cofferdam 5 for support, forming a stable structure.

[0045] In some embodiments of the present invention, a total of three hook lifting points are provided on the fourth cofferdam 4 and the second lower foundation 6. The lapped fourth cofferdam 4 and the second lower foundation 6 can be hoisted simultaneously by the three hooks of a gantry crane, with stable hoisting and being relatively convenient.

[0046] In some embodiments of the present invention, a total of three hook lifting points are provided on the fifth cofferdam 5 and the third lower foundation 7. The lapped fifth cofferdam 5 and the third lower foundation 7 can be hoisted simultaneously by the three hooks of a gantry crane, with stable hoisting and being relatively convenient.

[0047] An installation method for the cofferdam and lower foundation structure of a wind power platform according to a preferred embodiment of the present invention includes the following steps:

[0048] S1: Hoist the first cofferdam 1 to the designated position;

[0049] S2: Hoist the first lower foundation 3 to one side of the first cofferdam 1, and cooperate and fix the third fixing point 31 on the first lower foundation 3 with the first fixing point 11 on the first cofferdam 1;

[0050] S3: Hoist the second cofferdam 2 to the side of the first lower foundation 3 facing away from the first cofferdam 1, and cooperate and fix the second fixing point on the second cofferdam 2 with the third fixing point 31 on the side of the first lower foundation 3 facing away from the first cofferdam 1;

[0051] S4: Hoist the fourth cofferdam 4 and the second lower foundation 6, and cooperate and fix the fourth cofferdam 4 and the second lower foundation 6 through the fourth fixing point on the fourth cofferdam 4;

[0052] S5: Hoist the fourth cofferdam 4 and the second lower foundation 6 together to connect with one side of the second cofferdam 2;

[0053] S6: Hoist the fifth cofferdam 5 and the third lower foundation 7, and cooperate and fix the fifth cofferdam 5 and the third lower foundation 7 through the fifth fixing point on the fifth cofferdam 5;

[0054] S7: Hoist the fifth cofferdam 5 and the third lower foundation 7 together to connect with one side of the first cofferdam 1.

[0055] Through the mutually cooperating first fixing point 11 and third fixing point 31 provided between the first cofferdam 1 and the first lower foundation 3, the present invention completes the fixation between the first cofferdam 1 and the first lower foundation 3. Through the mutually cooperating second fixing point and third fixing point 31 provided between the second cofferdam 2 and the first lower foundation 3, the present invention completes the fixation between the second cofferdam 2 and the first lower foundation 3. Through the fourth fixing point between the fourth cofferdam 4 and the second lower foundation 6, the present invention completes the fixation between the fourth cofferdam 4 and the second lower foundation 6. Through the fifth fixing point between the fifth cofferdam 5 and the third lower foundation 7, the present invention completes the fixation between the fifth cofferdam 5 and the third lower foundation 7. Combining the characteristics that the division between the cofferdam and the lower foundation segments is in an inlaid rather than flush form, the present invention ensures the production integrity of each part of the lower foundation segments, fully considers the segment stripping ability of the indoor workshop, and realizes the in-place segment hoisting under the premise of multiple structural concavities and convexities, ensuring the hoisting quality and fixation effect of the lower foundation and cofferdam of the wind power platform.

[0056] In some embodiments of the present invention, in the step of fixing the third fixing point 31 on the first lower base 3 to cooperate with the first fixing point 11 on the first surrounding well 1 in S2, it further includes: first hoisting and translating the first lower base 3 to below the first fixing point 11 to align the third fixing point 31 and the first fixing point 11, and then raising the first lower base 3 so that the third fixing point 31 abuts against the first fixing point 11. This hoisting method completes the lapping of the first surrounding well 1 and the first fixing point 11. The bottom-up hoisting method enables the first surrounding well 1 with a fixed position to not need to move to cooperate with the first lower base 3. When hoisting the second surrounding well 2, it can directly land on one side of the first lower base 3, and the second fixing point can directly abut against the third fixing point 31 from top to bottom.

[0057] In the installation method in some embodiments of the present invention, when hoisting the fourth surrounding well 4 and the second lower base 6, it includes the following steps: hoist the fourth surrounding well 4 to a position at least 100 mm away from the second surrounding well 2, and prepare to hoist it after completing the lapping with the second lower base 6; then hoist the second lower base 6 to one side of the fourth surrounding well 4 and cooperate with the fourth surrounding well 4 for fixing. The second lower base 6 is hoisted directly from top to bottom. After abutting against the fourth fixing position, translate it for a certain distance through the three hooks of a gantry crane, so that the combination of the second lower base 6 and the fourth surrounding well 4 is connected to the second surrounding well 2. By using the operation method of offset pre-positioning + aerial pre-assembly, the two are combined into one, and the operation characteristics of jointly lifting with the three hooks of the gantry crane are skillfully utilized to solve the hoisting problems of the surrounding well and the lower base, with the characteristics of continuous operation, fast and convenient.

[0058] In the installation method in some embodiments of the present invention, when hoisting the fifth surrounding well 5 and the third lower base 7, it includes the following steps: hoist the fifth surrounding well 5 to a position at least 100 mm away from the first surrounding well 1, and prepare to hoist it after completing the lapping with the third lower base 7; then hoist the third lower base 7 to one side of the fifth surrounding well 5 and cooperate with the fifth surrounding well 5 for fixing. The third lower base 7 is hoisted directly from top to bottom. After abutting against the fifth fixing position, translate it for a certain distance through the three hooks of a gantry crane, so that the combination of the third lower base 7 and the fifth surrounding well 5 is connected to the second surrounding well 2.

[0059] The working process of the present invention is as follows: The fixation between the first surrounding well 1 and the first lower base 3 is completed through the mutually cooperating first fixing point 11 and the third fixing point 31 provided between the first surrounding well 1 and the first lower base 3. The fixation between the second surrounding well 2 and the first lower base 3 is completed through the mutually cooperating second fixing point and the third fixing point 31 provided between the second surrounding well 2 and the first lower base 3. The fixation between the fourth surrounding well 4 and the second lower base 6 is completed through the fourth fixing point between the fourth surrounding well 4 and the second lower base 6. The fixation between the fifth surrounding well 5 and the third lower base 7 is completed through the fifth fixing point between the fifth surrounding well 5 and the third lower base 7.

[0060] In summary, the embodiment of the present invention provides a cofferdam and a lower foundation structure of a wind power platform and an installation method thereof. Considering the feature that the division between the cofferdam and the lower foundation segments is in an inlaid form rather than a flush form, the manufacturing integrity of each part of the lower foundation segments is ensured. The demolding ability of the segments in the indoor workshop is also fully considered. On the premise that there are structural concavities and convexities for embedding in many places, the in-place hoisting of the segments is realized, and the hoisting quality and fixing effect of the lower foundation and the cofferdam of the wind power platform are ensured.

[0061] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A cofferdam and lower foundation structure of a wind power platform, characterized in that, it includes: The first cofferdam and the second cofferdam are symmetrically arranged, and a first fixing point and a second fixing point are respectively arranged on the opposite side end faces of the first cofferdam and the second cofferdam; The first lower foundation is arranged between the first cofferdam and the second cofferdam, both ends of the first lower foundation are respectively connected to the first cofferdam and the second cofferdam, and third fixing points are arranged at both ends of the first lower foundation, and the third fixing points are respectively matched with the first fixing point and the second fixing point; The fourth cofferdam and the fifth cofferdam are symmetrically arranged and connected to each other, the fourth cofferdam is connected to the second cofferdam, the fifth cofferdam is connected to the first cofferdam, and a fourth fixing point and a fifth fixing point are respectively arranged on the fourth cofferdam and the fifth cofferdam; The second lower foundation and the third lower foundation are symmetrically arranged, the second lower foundation is fixedly connected to the fourth cofferdam through the fourth fixing point, and the third lower foundation is fixedly connected to the fifth cofferdam through the fifth fixing point; The first fixing point and the second fixing point include a protruding part, the third fixing point includes a first extension plate matched with the protruding part, and when the first cofferdam, the second cofferdam and the first lower foundation are fixed, the extension plate abuts against the lower part of the protruding part; The fourth fixing point and the fifth fixing point include a second extension plate extending towards the second lower foundation and the third lower foundation, and the bottom surfaces of the second lower foundation and the third lower foundation respectively abut against the second extension plate.

2. The cofferdam and lower foundation structure of the wind power platform according to claim 1, characterized in that: Dock piers and round pipes are arranged at the bottoms of the first cofferdam, the second cofferdam, the fourth cofferdam and the fifth cofferdam for support.

3. The cofferdam and lower foundation structure of the wind power platform according to claim 1, characterized in that: A total of three hook lifting points are arranged on the fourth cofferdam and the second lower foundation.

4. The cofferdam and lower foundation structure of the wind power platform according to claim 1, characterized in that: A total of three hook lifting points are arranged on the fifth cofferdam and the third lower foundation.

5. An installation method of a cofferdam and lower foundation structure of a wind power platform, used for installing the cofferdam and lower foundation structure of the wind power platform according to any one of claims 1-4, characterized in that, it includes the following steps: Lift the first cofferdam to the designated position; Lift the first lower foundation to one side of the first cofferdam, and fix the third fixing point on the first lower foundation with the first fixing point on the first cofferdam; Lift the second cofferdam to the side of the first lower foundation facing away from the first cofferdam, and fix the second fixing point on the second cofferdam with the third fixing point on the side of the first lower foundation facing away from the first cofferdam; Lift the fourth cofferdam and the second lower foundation, and fix the fourth cofferdam and the second lower foundation through the fourth fixing point on the fourth cofferdam; Lift the fourth cofferdam and the second lower foundation together to connect with one side of the second cofferdam; Lift the fifth perimeter well and the third lower foundation, and fix the fifth perimeter well and the third lower foundation in cooperation through the fifth fixing point on the fifth perimeter well; Lift the fifth perimeter well and the third lower foundation together and connect them to one side of the first perimeter well.

6. The installation method of the perimeter well and lower foundation structure of a wind power platform according to claim 5, characterized in that, In the step of fixing the third fixing point on the first lower foundation and the first fixing point on the first perimeter well in cooperation, it further includes: first lift and translate the first lower foundation to below the first fixing point to align the third fixing point and the first fixing point, and then raise the first lower foundation so that the third fixing point abuts against the first fixing point.

7. The installation method of the perimeter well and lower foundation structure of a wind power platform according to claim 5, characterized in that, When lifting the fourth perimeter well and the second lower foundation, it includes the following steps: lift the fourth perimeter well to a position at least 100 mm away from the second perimeter well, and then lift the second lower foundation to one side of the fourth perimeter well and fix it in cooperation with the fourth perimeter well.

8. The installation method of the perimeter well and lower foundation structure of a wind power platform according to claim 5, characterized in that, When lifting the fifth perimeter well and the third lower foundation, it includes the following steps: lift the fifth perimeter well to a position at least 100 mm away from the first perimeter well, and then lift the third lower foundation to one side of the fifth perimeter well and fix it in cooperation with the fifth perimeter well.

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