Inverted bracket structure suitable for offshore boosting platform first pile type foundation

Abstract

The invention provides an inverted bracket structure suitable for an offshore boosting platform first pile type foundation, which comprises a guide pipe frame and a steel pipe pile, an inverted bracket is arranged between the guide pipe frame and the steel pipe pile, the inverted bracket is arranged on the guide pipe frame in a penetrating manner and is welded, and a plurality of guide blocks which are uniformly arranged along the circumferential direction are welded on the peripheral side of the lower end part of the guide pipe frame; and the lower end part of the jacket with the guide block penetrates into the steel pipe pile and is fixed by grouting. The jacket and the steel pipe pile are connected through the inverted bracket structure, the load on the jacket is reliably transmitted to the steel pipe pile foundation, the connecting mode is simple, offshore welding operation is avoided, and construction is convenient; due to the arrangement of the stiffened plates, the overall strength and rigidity of the inverted bracket structure are enhanced; the arrangement of the base plate ensures that the contact surface between the steel pipe pile top and the inverted bracket structure is flat, and ensures reliable force transmission at the joint of the jacket node and the pile top; and the guide blocks are arranged, so that offshore construction calibration and positioning are facilitated, and the reliability and convenience of connection between the jacket and the pile foundation are guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of ocean engineering, and particularly to an inverted corbel structure applicable to the piled foundation of an offshore booster platform. Background Art

[0002] The offshore booster station is the heart of the entire offshore wind power project, undertaking the functions of boosting, transmitting, and monitoring of the wind farm, and is an indispensable part of the offshore wind power project. The offshore booster station consists of an upper module and a lower foundation. The upper module is the equipment module area, and the lower foundation is the main component to resist loads such as the environment, generally composed of a jacket and steel pipe piles.

[0003] The current foundations of offshore booster stations are mostly jacket foundations. According to the construction process, the jacket foundations are divided into piled-first and piled-later types. The piled-later type includes the inner-piled type and the foot-boot type. The piled-first foundation is a foundation type where pile foundation construction is carried out first and jacket construction is carried out later. The piled-first jacket foundation has great differences compared with other foundation types, mainly reflected in the connection between the steel pipe piles and the jacket body. The connection of general foundation types is mainly carried out through high-strength grouting material for coupling connection. For the piled-first foundation, not only high-strength grouting material is required, but also an inverted corbel structure needs to be set separately to couple the jacket and the steel pipe piles more stably together, so as to jointly resist the loads on the offshore booster station as a whole and ensure the safe operation of the offshore booster station.

[0004] At the same time, the piled-first jacket foundation has greater advantages in the amount of steel structure work compared with the piled-later jacket foundation, which can effectively save the investment in the steel structure of the project. However, the connection surface between the steel pipe piles and the jacket of the piled-first foundation is less, so higher requirements are put forward for the connection between the two. Summary of the Invention

[0005] The main purpose of the present invention is to provide an inverted corbel structure applicable to the piled foundation of an offshore booster platform, and it is expected to effectively solve the problems in the background art.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An inverted corbel structure applicable to the piled foundation of an offshore booster platform, comprising a jacket and steel pipe piles. An inverted corbel is provided between the jacket and the steel pipe piles. The inverted corbel penetrates through the jacket and is welded. A plurality of guide blocks are welded on the circumferential side of the lower end of the jacket and are evenly arranged along the circumferential direction; the lower end of the jacket with guide blocks penetrates into the steel pipe piles and is fixed by grouting.

[0008] While adopting the above technical solutions, the present invention can also adopt or combine the following technical solutions:

[0009] As a preferred technical solution of the present invention: the inverted corbel includes an upper ring plate and a lower ring plate, and a number of first stiffening plates and second stiffening plates are welded between the upper ring plate and the lower ring plate and are evenly arranged circumferentially; the first stiffening plates are used to support the upper ring plate and the lower ring plate, and the second stiffening plates are used to support the horizontal braces of the jacket.

[0010] As a preferred technical solution of the present invention: the upper ring plate is provided with a number of openings for arranging the horizontal braces of the jacket.

[0011] As a preferred technical solution of the present invention: the lower ring plate is a circular ring.

[0012] As a preferred technical solution of the present invention: at least two slurry overflow holes are provided on the lower ring plate.

[0013] As a preferred technical solution of the present invention: the first stiffening plate is a rectangular steel plate with chamfering treatment.

[0014] As a preferred technical solution of the present invention: the second stiffening plate is a rectangular steel plate.

[0015] As a preferred technical solution of the present invention: backing plates are respectively provided between the first stiffening plates, the second stiffening plates and the lower ring plate.

[0016] As a preferred technical solution of the present invention: the thickness of the backing plate is 20 - 40 mm.

[0017] The present invention provides an inverted corbel structure applicable to the pre-piled foundation of an offshore booster platform, which has the following beneficial effects: the inverted corbel structure connects the jacket and the steel pipe pile, reliably transfers the load on the jacket to the steel pipe pile foundation, the connection method is simple, avoiding offshore welding operations and facilitating construction; the setting of the stiffening plates enhances the overall strength and stiffness of the inverted corbel structure; the setting of the backing plates ensures the flatness of the contact surface between the top of the steel pipe pile and the inverted corbel structure, ensuring reliable force transmission at the connection between the jacket node and the pile top; the setting of the guide blocks facilitates the calibration and positioning during offshore construction, which is beneficial to ensuring the reliability and convenience of the connection between the jacket and the pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the inverted corbel structure applicable to the pre-piled foundation of an offshore booster platform provided by the present invention;

[0019] Figure 2 is a partial sectional view;

[0020] Figure 3 is a schematic diagram of the backing plate;

[0021] Figure 4 is a schematic diagram of the upper ring plate;

[0022] Figure 5 Schematic diagram of the lower ring plate;

[0023] Figure 6 Schematic diagram of the first stiffening plate;

[0024] Figure 7 Schematic diagram of the second stiffening plate;

[0025] Figure 8 Schematic diagram of the guiding block;

[0026] In the figure: 1 - Jacket; 2 - Reverse corbel; 3 - Steel pipe pile; 11 - Guiding block; 21 - Upper ring plate; 22 - Lower ring plate; 23 - First stiffening plate; 24 - Second stiffening plate; 25 - Base plate. Specific implementation mode

[0027] The present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

[0028] As Figure 1-8 shown, a reverse corbel structure applicable to the pre - pile foundation of an offshore booster platform includes a jacket 1 and a steel pipe pile 3. A reverse corbel 2 is provided between the jacket 1 and the steel pipe pile 3. The reverse corbel 2 penetrates through the jacket 1 and is welded. A plurality of guiding blocks 11 are welded on the circumferential side of the lower end of the jacket 1 and are evenly arranged along the circumferential direction. The guiding blocks 11 facilitate the lowering of the jacket and reduce the construction deviation, facilitating the deviation correction during offshore construction; the lower end of the jacket 1 with the guiding blocks 11 penetrates into the steel pipe pile 3 and is fixed by grouting.

[0029] The reverse corbel 2 includes an upper ring plate 21 and a lower ring plate 22. A plurality of first stiffening plates 23 and second stiffening plates 24 are welded between the upper ring plate 21 and the lower ring plate 22 and are evenly arranged along the circumferential direction; the first stiffening plates 23 are used to support the upper ring plate 21 and the lower ring plate 22, and the second stiffening plates 24 are used to support the horizontal braces of the jacket 11.

[0030] The upper ring plate 21 is provided with a plurality of openings for arranging the horizontal braces of the jacket 1.

[0031] The lower ring plate 22 is a circle.

[0032] The lower ring plate 22 is provided with at least two slurry overflow holes, and the positions of the slurry outlet are avoided from the first stiffening plate 23 and the second stiffening plate 24.

[0033] The first stiffening plate 23 is a rectangular steel plate with chamfering treatment, the second stiffening plate 24 is a rectangular steel plate, and the component sizes of the first stiffening plate 23 and the second stiffening plate 24 can be adjusted according to specific needs.

[0034] A spacer plate 25 is respectively provided between the first stiffening plate 23, the second stiffening plate 24 and the lower ring plate 22. The spacer plate 25 ensures the flatness of the contact surface between the top of the steel pipe pile 3 and the inverted corbel 2, and guarantees the reliable force transmission at the connection between the node of the jacket 1 and the pile top.

[0035] The thickness of the spacer plate 25 is 20 - 40 mm.

[0036] Specifically, the above-mentioned inverted corbel structure applicable to the pile - first foundation of the offshore booster platform is implemented in the following manner:

[0037] First, on land, the jacket 1 is passed through the inverted corbel 2 and welded. The welded parts include between the upper ring plate 21 and the jacket 1, between the lower ring plate 22 and the jacket 1, between the first stiffening plate 23, the second stiffening plate 24 and the jacket 1, between the upper ring plate 21 and the horizontal brace of the jacket 11, and between the second stiffening plate 24 and the horizontal brace of the jacket 11. Then, a number of guide blocks 11 evenly arranged along the circumferential direction are welded at the bottom of the jacket 1. Finally, the combined body of the jacket 1 and the inverted corbel 2 is placed on the steel pipe pile 3 by hoisting and fixed by grouting through the grout overflow holes.

[0038] The above - mentioned specific implementation manners are used to explain the present invention. They are only the preferred embodiments of the present invention, rather than a limitation to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and the protection scope of the claims of the present invention all fall within the protection scope of the present invention.

Claims

1. An inverted bracket structure suitable for a pile-type foundation of an offshore boost platform, comprising a jacket (1) and steel pipe piles (3), characterized in that: An inverted bracket (2) is provided between the jacket (1) and the steel pipe pile (3); the inverted bracket (2) is inserted into the jacket (1) and welded; a plurality of guide blocks (11) uniformly arranged in an annular direction are welded to the circumference of the lower end of the jacket (1); the lower end of the jacket (1) with the guide blocks (11) is inserted into the steel pipe pile (3) and fixed by grouting.

2. The inverted bracket structure suitable for the pile foundation of an offshore boost platform according to claim 1 is characterized in that: The inverted bracket (2) comprises a plurality of first stiffening plates (23) and second stiffening plates (24) uniformly arranged in the circumferential direction, which are welded between the upper ring plate (21) and the lower ring plate (22); the first stiffening plates (23) are used to support the upper ring plate (21) and the lower ring plate (22), and the second stiffening plates (24) are used to support the horizontal support of the conductor frame (11).

3. The inverted bracket structure suitable for the pile foundation of an offshore boost platform according to claim 1 or 2, characterized in that: The upper ring plate (21) is provided with a plurality of openings, and the openings are used to arrange horizontal supports of the catheter frame (11).

4. The inverted bracket structure suitable for the pile foundation of an offshore boost platform according to claim 2 is characterized in that: The lower ring plate (22) is a circular ring.

5. The inverted bracket structure suitable for the pile foundation of an offshore boost platform according to claim 2 or 4, characterized in that: The lower ring plate (22) is provided with at least two overflow holes.

6. The inverted bracket structure suitable for the pile foundation of an offshore boost platform according to claim 2 is characterized in that: The first stiffening plate (23) is a chamfered rectangular steel plate.

7. The inverted bracket structure suitable for the pile foundation of an offshore boost platform according to claim 2 is characterized in that: The second stiffening plate (24) is a rectangular steel plate.

8. The inverted bracket structure applicable to the pile foundation of an offshore boost platform according to claim 2 is characterized in that: Pads (25) are respectively provided between the first stiffening plate (23), the second stiffening plate (24) and the lower ring plate (22).

9. The inverted bracket structure applicable to the pile foundation of an offshore boost platform according to claim 8, characterized in that: The thickness of the pad (25) is 20 to 40 mm.

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