Offshore wind turbine foundation steel pipe pile splicing structure

Abstract

The utility model relates to the technical field of steel pipe pile splicing structures, and discloses an offshore wind turbine foundation steel pipe pile splicing structure which comprises at least two sections of steel pipe piles which are sequentially connected from top to bottom, neck bushes which are mounted between every two adjacent steel pipe piles, reinforcing plates which are mounted on the outer walls of the neck bushes and are in contact with the inner walls of the steel pipe piles, and steel pipe piles which are mounted on the inner walls of the neck bushes, the reinforcing plates are installed between every two adjacent steel pipe piles, the reinforcing plates are fixedly connected with the outer walls of the steel pipe piles, and the multiple reinforcing plates are distributed along the outer walls of the steel pipe piles at intervals. The positioning problem can be solved, and the connection strength can be improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of a steel pipe pile splicing structure, in particular to an offshore wind turbine foundation steel pipe pile splicing structure. BACKGROUND

[0002] In recent years, offshore wind power has developed rapidly at home and abroad, and pile foundations have been widely used in offshore wind farms due to their large rigidity, small settlement and good stability. For offshore wind farms with hard geology (coarse sand, weathered rock, etc.), pile foundations have become the only available wind turbine foundation type. However, the seabed geology, topography and landform of offshore wind farms are complex, and there may be soft interlayer in hard soil layer. During the geological survey of offshore wind farms, due to factors such as time and cost, the soil layer may not be fully revealed, so during the pile sinking process of the offshore wind turbine steel pipe pile, some steel pipe piles may not be driven to the effective bearing capacity but the pile top is below the design elevation. For such steel pipe piles, offshore lengthening steel pipe piles are needed, and the pile is driven to a certain depth to meet the bearing capacity requirements of the offshore wind turbine foundation.

[0003] When the steel pipe piles are spliced on site, the steel pipe piles are connected by welding, and the problem of difficult positioning when the steel pipe piles are butt jointed exists. CONTENT OF THE UTILITY MODEL

[0004] In order to improve the convenience of steel pipe pile butt jointing, the application provides an offshore wind turbine foundation steel pipe pile splicing structure.

[0005] The application provides an offshore wind turbine foundation steel pipe pile splicing structure, which adopts the following technical scheme:

[0006] An offshore wind turbine foundation steel pipe pile splicing structure comprises:

[0007] At least two steel pipe piles are connected in sequence from top to bottom,

[0008] An inner sleeve is installed between the two adjacent steel pipe piles, and the outer wall of the inner sleeve is in contact with the inner wall of the steel pipe,

[0009] A reinforcing plate is installed between the two adjacent steel pipe piles, and the reinforcing plate is fixedly connected with the outer wall of the steel pipe, and the reinforcing plate is spacedly distributed along the outer wall of the steel pipe.

[0010] By adopting the above technical scheme, the inner sleeve serves as a guide structure, and the close contact between the outer wall and the inner wall of the steel pipe ensures the coaxiality of the upper and lower steel pipe piles during splicing, avoids the positioning difficulty caused by deviation during welding, the reinforcing plate is spacedly distributed along the outer wall to form a multi-point support, disperses the stress concentration at the splicing position, enhances the overall bending and shearing resistance, and adapts to complex sea conditions load, which can not only solve the positioning problem, but also improve the connection strength.

[0011] Optionally, a connecting ring is connected between the inner sleeve and the reinforcing plate, and the connecting ring is fixedly connected to the end of the steel pipe pile at two end faces.

[0012] By adopting the above technical scheme, the connecting ring forms a closed loop structure, rigidly connecting the inner sleeve and the reinforcing plate, preventing relative displacement at the pile connection due to seawater impact or vibration, and improving structural stability.

[0013] Optionally, a first glue injection hole is formed in the circumferential side of the connecting ring, one end of the first glue injection hole is away from the inner sleeve, and the other end of the first glue injection hole is towards the end face of the steel pipe pile.

[0014] By adopting the above technical scheme, the glue injection hole is used for injecting sealant to fill the gap between the end face of the steel pipe and the inner sleeve, block the seawater penetration path, prevent internal corrosion, and also strengthen the connection strength of the connecting ring and the steel pipe pile.

[0015] Optionally, a through hole is formed in the circumferential side of the connecting ring, a first glue groove is formed in the outer wall of the inner sleeve, and the through hole and the first glue groove are in communication.

[0016] By adopting the above technical scheme, the communication between the through hole and the glue groove forms an annular glue injection channel, so that the sealant is uniformly distributed between the inner sleeve and the inner wall of the steel pipe, and the connection relationship between the inner sleeve and the steel pipe pile is strengthened.

[0017] Optionally, a protective plate is installed between the two adjacent reinforcing plates, and the protective plate is attached to the outer wall of the steel pipe pile.

[0018] By adopting the above technical scheme, the protective plate covers the outer wall of the steel pipe, blocks the direct contact of seawater with the connection part of the steel pipe, and the protective plate can absorb external impact energy (such as ship anchor impact).

[0019] Optionally, a slot is formed in the side wall of the reinforcing plate, the protective plate is connected with a plug-in block, and the plug-in block is plugged into the slot.

[0020] By adopting the above technical scheme, the protective plate is quickly fixed by plugging, which shortens the offshore construction time.

[0021] Optionally, a second glue injection hole is formed in the inner wall of the slot, a second glue groove is formed in the side of the reinforcing plate facing the steel pipe pile, and the second glue injection hole and the second glue groove are in communication.

[0022] By adopting the above technical scheme, the connection strength of the reinforcing plate and the steel pipe pile is further improved, and the protective plate can also cover the second glue injection hole.

[0023] Optionally, two second glue grooves are formed in one reinforcing plate, and the two second glue grooves correspond to one steel pipe pile respectively.

[0024] By adopting the technical scheme, the two glue grooves ensure uniform bonding of the two sides of the reinforcing plate with the upper and lower steel pipe piles.

[0025] In summary, the present application includes at least one of the following beneficial effects:

[0026] 1. By the cooperation of the inner sleeve, the reinforcing plate and the connecting ring, the tight connection and effective support between the steel pipe piles are realized, which significantly improves the overall stability and strength of the pile connection structure. This design effectively addresses the pile sinking challenges under complex geological conditions of offshore wind farms, ensuring the bearing capacity and safety of the wind turbine foundation;

[0027] 2. By multiple glue injection designs, the connection strength of the steel pipe piles is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the overall structure sectional view of the embodiment of the present application;

[0029] Figure 2 is the overall structure schematic diagram of the embodiment of the present application embodying the connection of the inner sleeve, the reinforcing plate and the connecting ring;

[0030] Figure 3 is the sectional view of the first glue injection hole section of the embodiment of the present application;

[0031] Figure 4 is the sectional view of the through hole section of the embodiment of the present application;

[0032] Figure 5 is the local explosion schematic diagram of the embodiment of the present application embodying the cooperation of the protective plate and the reinforcing plate;

[0033] Figure 6 is the sectional view of the second glue hole and the second glue groove of the embodiment of the present application.

[0034] Reference signs: 10, steel pipe pile; 20, inner sleeve; 21, first glue groove; 30, reinforcing plate; 31, insertion slot; 32, second glue groove; 40, connecting ring; 41, first glue injection hole; 42, second glue injection hole; 43, through hole; 50, protective plate; 51, insertion block. DETAILED DESCRIPTION

[0035] The following will be described in detail in combination with the accompanying Figure 1 - the accompanying Figure 6 The present application will be further described in detail.

[0036] The steel pipe pile connection structure of the offshore wind turbine foundation aims to provide a stable, efficient and adaptive complex sea condition pile connection solution. The overall structure includes at least two sections of steel pipe piles 10, which are connected in order from top to bottom to form the main support frame of the wind turbine foundation.

[0037] With reference to Figure 1 Between the two adjacent steel pipe piles 10, an inner sleeve 20 and a reinforcing plate 30 are installed. The outer wall of the inner sleeve 20 is tightly sleeved with the inner wall of the lower end steel pipe pile 10, which ensures the coaxiality of the upper and lower steel pipe piles 10 and avoids the deviation problem that may occur during welding. The reinforcing plate 30 is fixedly welded to the outer wall of the steel pipe pile 10 and is distributed at intervals along the outer wall of the steel pipe pile 10, forming a multi-point support, effectively dispersing the stress concentration at the pile joint, and enhancing the bending and shearing resistance of the overall structure.

[0038] With reference to Figure 2 In order to further strengthen the stability of the pile joint structure, a connecting ring 40 is connected between the inner sleeve 20 and the reinforcing plate 30, and the inner sleeve 20, the connecting ring 40 and the reinforcing plate 30 are integrally formed. The two end faces of the connecting ring 40 are respectively welded and fixed with the end portions of the steel pipe pile 10, forming a closed loop structure, strengthening the connection relationship between the inner sleeve 20 and the reinforcing plate 30, and effectively preventing the relative displacement of the pile joint caused by seawater impact or vibration.

[0039] With reference to Figure 2 and Figure 3 A first glue injection hole 41 and a through hole 43 are provided on the outer peripheral side of the connecting ring 40. The cross section of the first glue injection hole 41 is T-shaped structure, one end of the first glue injection hole 41 is away from the inner sleeve 20, and the other end is towards the end face of the steel pipe pile 10, which is used for injecting sealing glue, filling the gap between the steel pipe end face and the inner sleeve 20, blocking the seawater penetration path, preventing internal corrosion, and strengthening the connection strength of the connecting ring 40 and the steel pipe pile 10.

[0040] With reference to Figure 4 The through hole 43 is in communication with the first glue groove 21 on the outer wall of the inner sleeve 20. The first glue groove 21 is annular structure, forming a ring-shaped glue injection channel, so that the sealing glue is uniformly distributed between the inner sleeve 20 and the inner wall of the steel pipe, further strengthening the connection relationship between the inner sleeve 20 and the steel pipe pile 10.

[0041] In addition, with reference to Figure 5 Between the two adjacent reinforcing plates 30, protective plates 50 are also installed, which are attached to the outer wall of the steel pipe pile 10, effectively blocking the direct contact of seawater with the connecting portion of the steel pipe pile 10, and can absorb external impact energy such as ship anchor impact. The side wall of the reinforcing plate 30 is provided with a slot 31, and the protective plate 50 is inserted with the slot 31 of the side wall of the reinforcing plate 30 through the insertion block 51, realizing quick fixing and shortening the offshore construction time.

[0042] With reference to Figure 5 and Figure 6The inner wall of the slot 31 is provided with a second glue injection hole 42, and the protective plate 50 covers the second glue groove 32. The side of the reinforcing plate 30 facing the steel pipe pile 10 is provided with the second glue groove 32, and the cross section of the second glue groove 32 is a rectangular structure. The second glue injection hole 42 is in communication with the second glue groove 32, further improving the connection strength of the reinforcing plate 30 and the steel pipe pile 10. It is worth mentioning that the second glue groove 32 of each reinforcing plate 30 is provided with at least two, corresponding to a section of the steel pipe pile 10, and the steel pipe pile 10 of the application corresponds to two second glue grooves, which ensures the uniform adhesion of the reinforcing plate 30 on both sides to the upper and lower steel pipe piles 10.

[0043] The installation process of the offshore wind turbine foundation steel pipe pile joint structure according to an embodiment of the application is as follows:

[0044] The original steel pipe pile 10 joint is checked, the inner liner 20 is sleeved on the original steel pipe pile 10, the joint is first performed, when the upper and lower steel pipe piles 10 are coaxially connected, the glue is first injected into the first glue injection hole 41, the second glue injection hole 42 and the through hole 43, so that the glue fills the gap between the connecting ring 40 and the end surface of the steel pipe pile 10, the inner liner 20 is connected with the steel pipe pile 10, and the reinforcing plate 30 is bonded with the steel pipe pile 10, then welding operation is performed, the connecting ring 40 and the connecting part of the two steel pipe piles 10 are welded, and the joint is completed after the welding seam is detected, the protective plate 50 is installed after the welding seam is detected.

[0045] The above are preferred embodiments of the application, and are not intended to limit the protection scope of the application, therefore: any equivalent changes made on the basis of the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. Offshore wind turbine foundation steel pipe pile splicing structure, characterized by, The utility model relates to a steel pipe pile connecting structure, including: At least two steel pipe piles (10) are connected from top to bottom in sequence, An inner bushing (20) is installed between two adjacent steel pipe piles (10), and the outer wall of the inner bushing (20) is in contact with the inner wall of the steel pipe pile (10), A reinforcing plate (30) is installed between two adjacent steel pipe piles (10), and the reinforcing plate (30) is fixedly connected with the outer wall of the steel pipe pile (10), and a plurality of reinforcing plates (30) are distributed along the outer wall of the steel pipe at intervals.

2. A steel pipe pile splicing structure for offshore wind turbine foundation according to claim 1, characterized in that, A connecting ring (40) is connected between the inner bushing (20) and the reinforcing plate (30), and the two end faces of the connecting ring (40) are fixedly connected with the end of a steel pipe pile (10).

3. A steel pipe pile splicing structure for offshore wind turbine foundation according to claim 2, characterized in that, A first glue injection hole (41) is formed in the circumferential side of the connecting ring (40), one end of the first glue injection hole (41) is away from the inner bushing (20), and the other end of the first glue injection hole (41) faces the end face of the steel pipe pile (10).

4. A steel pipe pile splicing structure for offshore wind turbine foundation according to claim 2, characterized in that, A through hole (43) is formed in the circumferential side of the connecting ring (40) in a radial direction, a first glue groove (21) is formed in the outer wall of the inner bushing (20), and the through hole (43) and the first glue groove (21) are communicated.

5. A steel pipe pile splicing structure for offshore wind turbine foundation according to claim 1, characterized in that, A protective plate (50) is installed between two adjacent reinforcing plates (30), and the protective plate (50) is attached to the outer wall of the steel pipe pile (10).

6. A steel pipe pile splicing structure for offshore wind turbine foundation according to claim 5, characterized in that, A slot (31) is formed in the side wall of the reinforcing plate (30), the protective plate (50) is connected with a plug-in block (51), and the plug-in block (51) is plugged into the slot (31).

7. A steel pipe pile splicing structure for offshore wind turbine foundation according to claim 6, characterized in that, A second glue injection hole (42) is formed in the inner wall of the slot (31), a second glue groove (32) is formed in the side of the reinforcing plate (30) facing the steel pipe pile (10), and the second glue injection hole (42) and the second glue groove (32) are communicated.

8. A steel pipe pile splicing structure for offshore wind turbine foundation according to claim 7, characterized in that, The second glue groove (32) of one reinforcing plate (30) is provided with at least two positions, and the two second glue grooves (32) correspond to one steel pipe pile (10) respectively.

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