Offshore wind power single pile foundation sleeve cage connecting structure

Abstract

The utility model discloses an offshore wind power single pile foundation sleeve cage connecting structure, and belongs to the technical field of offshore wind power construction. According to the sleeve cage structure, the annular connecting piece, the vertical connecting piece, the sleeve cage limiting piece and the sleeve cage fixing piece which are welded on the pile body are adopted, the sleeve cage limiting piece is inserted into a groove reserved in the pile body connecting piece, and the sleeve cage ring beam is directly placed on the pile body connecting piece, so that the vertical bearing capacity and the horizontal bearing capacity of the sleeve cage structure are greatly increased; the cage structure can bear large horizontal and vertical squeezing force of the ship, the bearing capacity of the joint can be increased, and the overall rigidity of the cage structure is improved; and it is guaranteed that the cage structure is tightly attached to the pile body.

Description

Technical Field

[0001] The utility model belongs to the technical field of offshore wind power construction, in particular to an offshore wind power single pile foundation cage connection structure. Background Art

[0002] In recent years, with the rapid development of the new energy industry and the continuous advancement of related technical levels, the installed capacity of domestic offshore wind power has become increasingly larger, and the wind farm area has developed from the intertidal zone to the nearshore and offshore areas. In order to adapt to various water depths, a variety of foundation types have been invented, among which single pile foundation has the most application cases in China.

[0003] Offshore wind energy resources are abundant, clean and efficient, and are an important support for the green transformation and development of energy. Single pile foundations have excellent bearing performance, simple design and manufacturing, and convenient construction. They have been most widely used in the built offshore wind farms, especially in sea areas with small single-unit capacity and shallow or medium water depths. In recent years, due to the advancement of construction technology, single pile foundations have appeared without transition sections, and have gradually developed towards large diameters and large water depths. In order to reduce the time of offshore construction and hoisting operations, auxiliary components such as anti-collision components, external wind turbine platforms, ladders, cable pipes and sacrificial anodes are designed as cage structures and installed on auxiliary components pre-installed on the pile body. The cage adopts a beam-column frame structure. The main components are pile corbels (used to place the cage), circular ring beams, columns, wedge blocks and other auxiliary components on the cage (including mooring parts, ladders, rest platforms and external platforms, etc.). Such as Figure 1 As shown, the existing cage and single pile foundation connection structure; the beam column on the cage 2 is connected to the single pile foundation 1 by bolts and other fixing parts 10. This method of fixing the overall cage structure and the pile body with bolts against the connecting parts and the pile body exposes a series of problems: the long-term operation vibration of the wind power foundation will cause the cage and the pile body to loosen, causing the cage structure to rotate slightly around the pile body, and the cage structure will deviate from the pile body by too large an angle after long-term accumulation. If the cage structure deviates from the pile body by too large an angle, it will cause cable pulling and damage. If the mooring structure deviates from the optimal angle, it will be impossible to board the ladder by mooring. The long-term relative movement between the cage and the pile body will cause damage to the paint coating of the pile body and increase the corrosion of the pile body, thereby endangering the structural safety, reducing the operation and maintenance efficiency, and increasing the operation and maintenance cost. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art and proposes a cage connection structure for an offshore wind power single pile foundation to ensure that the cage structure fits tightly with the pile body.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions.

[0006] An offshore wind power monopile foundation cage connection structure comprises a monopile foundation and a cage, wherein a cage platform is arranged on the top of the cage, and the cage is provided with a plurality of ring beams and vertical beams; a pile body platform beam connector, a pile body vertical connector, and a pile body annular connector are fixedly connected to the monopile foundation; a cage limiter and a cage fixing member are fixedly connected to the ring beam; and a cage platform beam connector is fixedly connected to the bottom of the cage platform;

[0007] The pile body platform beam connector on the single pile foundation corresponds to the position of the cage platform, and the pile body platform beam connector and the cage platform beam connector are connected by high-strength friction bolts;

[0008] The vertical connectors of the pile body of the single pile foundation are divided into multiple rows from top to bottom, each row has a number of small sections, and the small sections are evenly distributed along the same horizontal cross section of the pile body. Each small section has two vertical connectors of the pile body, and the end face of the vertical connector of the pile body in each small section is a cut-angle structure, so that the spacing between the two vertical connectors of the pile body in a small section forms a trapezoidal groove, and the size of the groove corresponds to the size of the cage limiter, so that the cage limiter is inserted into the trapezoidal groove along the vertical connector of the pile body; the cage limiter is connected to the cage fixing member, and the cage fixing member is connected to the vertical connector of the pile body through high-strength bolts;

[0009] Each row of pile body vertical connectors is connected to a pile body annular connector, and the pile body annular connector is supported on the lower part of the ring beam.

[0010] Furthermore, the pile body platform beam connector and the cage platform beam connector are both provided with bolt holes for connection, and the bolt holes are elliptical.

[0011] Furthermore, a weather-resistant rubber gasket is connected between the pile body platform beam connector and the cage platform beam connector.

[0012] Furthermore, the cage platform beam connector is provided with a cage platform beam connector stiffening rib, and the cage platform beam connector stiffening rib is supported on the bottom of the pile body platform beam. The pile body platform beam is located on a single pile foundation, and the pile body platform beam connector is fixedly connected to the pile body platform beam.

[0013] Furthermore, the pile body annular connector is connected with a plurality of pile body annular connector stiffening ribs.

[0014] Furthermore, a weather-resistant rubber gasket of the pile body annular connector is connected between the pile body annular connector and the ring beam.

[0015] The beneficial effects of the utility model compared with the prior art are:

[0016] (1) The utility model adopts annular and vertical connecting parts, cage limiters and cage fixing parts welded on the pile body. By inserting the cage limiters into the grooves reserved in the pile body connecting parts and placing the cage ring beam directly on the pile body connecting parts, the vertical and horizontal bearing capacities of the cage structure are greatly increased, so that the cage structure can withstand larger horizontal and vertical squeezing forces of ships. This measure can increase the bearing capacity of the nodes and increase the overall rigidity of the cage structure.

[0017] (2) The clearance tolerance between the cage ring beam and the annular connector of the single pile body can be achieved by adjusting the thickness of the weather-resistant rubber gasket of the annular connector of the pile body. The bolt holes of the cage platform beam connector and the pile body platform beam connector are elliptical, and the length of the elliptical hole can be adjusted as needed to meet the vertical tolerance requirements. The above series of measures ensure that the cage structure fits tightly with the pile body.

[0018] (3) The utility model inserts the cage limiter into the groove reserved in the pile body connector and fixes it with a cage fixing member with bolts, so that the cage structure is in close contact with the pile, which can eliminate the cage rotation under long-term environmental loads, ensure that the cage structure has no circumferential displacement, and the structure is safe and reliable, reducing the wear of the pile coating.

[0019] (4) The top cage platform beam connector of the utility model is connected to the pile platform beam connector by high-strength friction bolts with elliptical holes, which further ensures the bearing capacity requirements of the outer platform of the upper structure and further ensures that the vibration mode of the overall cage structure is consistent with that of the single pile structure, thereby avoiding vibration damage.

[0020] (5) The utility model can directly hoist the cage structure as a whole into place, and after the hoisting is completed, the bolts can be directly tightened. The construction is simple and reliable, and the offshore operation time is saved.

[0021] (6) The number of grooves between the pile body connectors can be set according to the project requirements. Increasing the number of grooves can reduce the rotation angle of the pile body when it is hoisted into place, facilitating the construction of single piles and the installation of cages. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the connection diagram between the existing common cage and the single pile foundation;

[0023] Figure 2 This is the connection diagram between the cage and the single pile foundation of the utility model;

[0024] Figure 3 This is a schematic diagram of a single pile foundation welding part of the utility model;

[0025] Figure 4 It is a plan view of the pile body platform beam connecting member of the utility model;

[0026] Figure 5This is a side view of the pile platform beam connector of the utility model;

[0027] Figure 6 It is a front view of the cage platform beam connecting member of the utility model;

[0028] Figure 7 It is a side view of the cage platform beam connecting member of the utility model;

[0029] Figure 8 It is a plan view of the connection between the vertical connecting piece of the pile body and the pile of the utility model;

[0030] Fig. 9 This is a side view of the connection node between the cage and the single pile foundation of the utility model;

[0031] Fig.10 This is a front view of the connection node between the cage and the single pile foundation of the utility model;

[0032] Fig.11 It is a structural schematic diagram of the cage limiting member of the utility model;

[0033] Fig.12 It is a structural schematic diagram of the pile body annular connecting piece described in the utility model.

[0034] In the figure:

[0035] 1 is a single pile foundation, 2 is a cage, 3 is a cage platform beam connector, 4 is a pile body platform beam connector, 5 is a pile body vertical connector, 6 is a pile body annular connector, 7 is a cage limiter, 8 is a cage fixing part, 9 is a ring beam, 10 is a fixing part, 11 is a cage platform, 12 is a vertical beam, 13 is a pile body platform beam, 14 is a pile body annular connector stiffening rib, 15 is a pile body annular connector weather-resistant rubber gasket, 31 is a cage platform beam connector stiffening rib. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0037] like Figures 1 to 12 As shown, this embodiment provides an offshore wind power single pile foundation cage connection structure, including a single pile foundation 1, a cage 2, a cage platform beam connector 3, a pile body platform beam connector 4, a pile body vertical connector 5, a pile body annular connector 6, a cage limiter 7, and a cage fixing member 8.

[0038] The pile platform beam connector 4, the pile vertical connector 5, and the pile annular connector 6 are all welded on the single pile foundation 1; a cage platform 11 is provided on the top of the cage 2, and the cage 2 is provided with multiple ring beams 9 and vertical beams 12. The cage platform beam connector 3 is welded on the ring beam 9 located at the bottom of the cage platform 11, and the other ring beams 9 on the cage 2 are welded with cage limiters 7 and cage fixings 8. All structural parts are steel structures, and the contact parts between the cage 2 and the single pile foundation 1 are made of flexible weather-resistant and seawater corrosion-resistant materials.

[0039] The pile body platform beam connector 4 on the single pile foundation 1 corresponds to the position of the cage platform 11, and the pile body platform beam connector 4 is connected to the cage platform beam connector 3 by high-strength friction bolts; the pile body platform beam connector 4 and the cage platform beam connector 3 are both provided with bolt holes for connection, and the bolt holes are elliptical, and the length of the elliptical holes can be adjusted as needed to meet the vertical tolerance requirements. A weather-resistant rubber gasket is connected between the pile body platform beam connector 4 and the cage platform beam connector 3. The cage platform beam connector 3 is provided with a cage platform beam connector stiffening rib 31, and the cage platform beam connector stiffening rib 31 is supported at the bottom of the pile body platform beam 13, and the pile body platform beam 13 is located on the single pile foundation 1, and the pile body platform beam connector 4 is fixedly connected to the pile body platform beam 13.

[0040] The pile body vertical connectors 5 of the single pile foundation 1 are divided into multiple rows from top to bottom, each row has a number of small sections, and the small sections are evenly distributed along the same horizontal cross-section of the pile body, each small section has two pile body vertical connectors 5, and the end face of the pile body vertical connector 5 in each small section is a cut-angle structure, so that the spacing between the two pile body vertical connectors 5 in a small section forms a trapezoidal groove, and the size of the groove corresponds to the size of the cage limiting member 7, so that the cage limiting member 7 is inserted into the trapezoidal groove along the pile body vertical connector 5; the cage limiting member 7 is made of a square tube; the cage limiting member 7 is connected to the cage fixing member 8, and the cage fixing member 8 is connected to the pile body vertical connector 5 through high-strength bolts.

[0041] Each row of pile body vertical connectors 5 is connected to a pile body annular connector 6 made of cold-bent channel steel, and each pile body annular connector 6 is connected to a plurality of pile body annular connector stiffening ribs 14. Each row of pile body vertical connectors 5 corresponds to the position of each ring beam 9, and the pile body annular connector 6 is supported at the lower part of the ring beam 9. A pile body annular connector weather-resistant rubber gasket 15 is connected between the pile body annular connector 6 and the ring beam 9.

[0042] The height of the pile platform beam connector 4, the pile body vertical connector 5, and the pile body annular connector 6 welded on the pile body of the single pile foundation 1 is strictly calculated to ensure that the ring beam 9 on the lower cage 2 can be smoothly sleeved over; the cage limiter 7 and the cage fixing member 8 are all welded on the ring beam 9 of the cage 2, and the pile body vertical connector 5 on the pile body is divided into multiple rows from top to bottom according to the needs of the project, and each row has a plurality of small sections, and the plurality of small sections are evenly distributed along the same horizontal cross section of the pile body, and each small section has two pile body vertical connectors 5, and the end face chamfering of the pile body vertical connector 5 in each small section is processed to ensure that the spacing between the two pile body vertical connectors 5 in a small section forms a trapezoidal groove, and the size of the groove corresponds to the size of the cage limiter 7, so that the cage limiter 7 can be smoothly inserted into the groove along the pile body vertical connector 5 and the spacing between the contact surfaces of the two can not be too large.

[0043] A plurality of pile body annular connectors 6 and a pile body platform beam connector 4 located at the upper part of the pile body are provided on the single pile foundation 1. The spacing between two adjacent pile body annular connectors 6 should be consistent with the spacing between two corresponding ring beams 9, and the tolerance should be strictly controlled. A pile body annular connector weather-resistant rubber gasket is provided between the pile body annular connector 6 and the ring beam 9. The gap tolerance between the ring beam 9 and the pile body annular connector 6 is achieved by adjusting the thickness of the pile body annular connector weather-resistant rubber gasket. The bolt holes of the cage platform beam connector 3 and the pile body platform beam connector 4 are elliptical, and the length of the elliptical hole can be adjusted as needed to meet the vertical tolerance requirements. The above series of measures ensure that the cage structure fits tightly with the pile body.

[0044] After the final cage 2 position adjustment is completed, the connector with pre-tightening bolts ensures that the final cage and the pile body can be tightly attached to each other to avoid shaking. All welding work is completed in the factory, and only the hoisting and tightening of the bolts are required on site.

[0045] The specific connection steps are:

[0046] ① The sinking of single pile foundation 1 is completed;

[0047] ② The construction of single pile anti-scour protection is completed;

[0048] ③ Cage 2 is ready to be put in place and the azimuth of cage 2 is confirmed;

[0049] ④ Measure the distance between the two ring beams 9 of the cage 2 and the distance between the two pile body annular connectors 6 of the single pile foundation 1. If the tolerance is small, it can be achieved by adjusting the thickness of the weather-resistant rubber gasket of the pile body annular connector. If the tolerance is large, it can be adjusted by spot welding the steel plate at the bottom of the cage ring beam.

[0050] ⑤Cage 2 is hoisted and installed in place;

[0051] ⑥ Pre-tighten the bolts of cage 2 fixings;

[0052] ⑦ Pre-tighten the bolts of the cage platform beam connector 3 and the pile body platform beam connector 4.

[0053] The above content is a further detailed description of the utility model in combination with a specific preferred implementation method. It cannot be determined that the specific implementation methods of the utility model are limited to this. For ordinary technicians in the technical field to which the utility model belongs, they can make several simple deductions or substitutions without departing from the utility model, which should be regarded as belonging to the utility model and the scope of patent protection determined by the submitted claims.

Claims

1. An offshore wind power monopile foundation cage connection structure, comprising a monopile foundation (1) and a cage (2), wherein a cage platform (11) is arranged on the top of the cage (2), and the cage (2) is provided with a plurality of ring beams (9) and vertical beams (12); characterized in that: The single pile foundation (1) is fixedly connected to a pile body platform beam connector (4), a pile body vertical connector (5), and a pile body annular connector (6); the annular beam (9) is fixedly connected to a cage limiter (7) and a cage fixing member (8); and the bottom of the cage platform (11) is fixedly connected to a cage platform beam connector (3); The pile body platform beam connector (4) on the single pile foundation (1) corresponds to the position of the cage platform (11), and the pile body platform beam connector (4) and the cage platform beam connector (3) are connected by high-strength friction bolts; The pile body vertical connectors (5) of the single pile foundation (1) are divided into multiple rows from top to bottom, each row has a plurality of small sections, the plurality of small sections are evenly distributed along the same horizontal cross section of the pile body, each small section has two pile body vertical connectors (5), the end surface of the pile body vertical connector (5) in each small section is a cut-angle structure, so that the spacing between the two pile body vertical connectors (5) in a small section forms a trapezoidal groove, the size of the groove corresponds to the size of the cage limiting member (7), so that the cage limiting member (7) is inserted into the trapezoidal groove along the pile body vertical connector (5); the cage limiting member (7) is connected to the cage fixing member (8), and the cage fixing member (8) is connected to the pile body vertical connector (5) through high-strength bolts; Each row of pile body vertical connecting members (5) is connected to a pile body annular connecting member (6), each row of pile body vertical connecting members (5) corresponds to the position of each ring beam (9), and the pile body annular connecting member (6) is supported on the lower part of the ring beam (9).

2. The offshore wind power monopile foundation cage connection structure according to claim 1, characterized in that: The pile body platform beam connecting piece (4) and the cage platform beam connecting piece (3) are both provided with bolt holes for connection, and the bolt holes are elliptical.

3. The offshore wind power monopile foundation cage connection structure according to claim 2, characterized in that: A weather-resistant rubber gasket is connected between the pile body platform beam connector (4) and the cage platform beam connector (3).

4. An offshore wind power monopile foundation cage connection structure according to claim 1 or 2, characterized in that: The cage platform beam connector (3) is provided with a cage platform beam connector stiffening rib (31), the cage platform beam connector stiffening rib (31) is supported on the bottom of the pile body platform beam (13), the pile body platform beam (13) is located on the single pile foundation (1), and the pile body platform beam connector (4) is fixedly connected to the pile body platform beam (13).

5. The offshore wind power monopile foundation cage connection structure according to claim 1, characterized in that: The pile body annular connecting piece (6) is connected to a plurality of pile body annular connecting piece stiffening ribs (14).

6. The offshore wind power monopile foundation cage connection structure according to claim 5, characterized in that: A pile body annular connecting piece weather-resistant rubber gasket (15) is connected between the pile body annular connecting piece (6) and the ring beam (9).

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