CN216405459U

CN216405459U - Offshore wind turbine generator system high pile-steel pipe concrete composite structure bearing platform foundation

Info

Publication number: CN216405459U
Application number: CN202122390238.8U
Authority: CN
Inventors: 王宇航; 刘子昂; 周绪红; 邓然; 杨庆山; 徐菲
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-04-29
Anticipated expiration: 2031-09-30

Abstract

The utility model relates to an offshore wind turbine high pile-steel tube concrete combined structure bearing platform foundation which comprises a combined structure bearing platform and pile groups for supporting the combined structure bearing platform, wherein the combined structure bearing platform is composed of an inner steel tube, an outer steel tube, a stiffening steel plate, a bottom steel plate and filled concrete, the inner steel tube is positioned inside the outer steel tube, the stiffening steel plate is positioned between the inner steel tube and the outer steel tube, the bottom steel plate is positioned at the bottom of the inner steel tube and the outer steel tube, holes are reserved on the bottom steel plate, the upper parts of the pile groups penetrate through the holes to be connected with the combined structure bearing platform, and the filled concrete is poured inside the combined structure bearing platform. The utility model adopts the steel-concrete combined structure to replace the traditional concrete structure, has good stress performance, high structural strength and less material consumption, and the steel structure part is integrally prefabricated on land, thereby being beneficial to simplifying the site construction process, reducing the construction difficulty, improving the engineering quality, integrally shortening the construction period and reducing the construction cost.

Description

Offshore wind turbine generator system high pile-steel pipe concrete composite structure bearing platform foundation

Technical Field

The utility model relates to the technical field of offshore wind power foundations, in particular to a bearing platform foundation of an offshore wind power generation set high pile-steel pipe concrete composite structure.

Background

A high pile bearing platform foundation is a common offshore wind turbine foundation and mainly comprises a bearing platform and pile groups. A conventional high pile cap foundation is generally composed of an upper concrete cap and a lower steel pipe pile or PHC pile.

The upper concrete bearing platform is large in size generally, and needs to be used for supporting templates, paving a large number of reinforcing steel bars and pouring concrete on site, so that the material consumption is large, the construction procedures are complicated, the construction period is long, and the engineering cost is greatly increased.

Considering that offshore wind farms are far off the shore, offshore operation is needed, the construction environment is severe, the requirement of mass concrete on construction is high, and the construction difficulty of the traditional concrete high-pile bearing platform foundation is high.

For offshore wind farm construction, the cost of the infrastructure typically accounts for 20% -30% of the cost of the entire wind farm. Therefore, certain measures are adopted to reduce material consumption, simplify construction procedures, improve engineering quality, shorten construction period and reduce construction cost, and the method is particularly important for comprehensive subsidy in the wind power industry.

Disclosure of Invention

In order to solve the problems of high material consumption, complex construction process, long construction period and high construction cost of the traditional concrete bearing platform in the prior art, the utility model provides a bearing platform foundation of a high pile-steel pipe concrete combined structure of an offshore wind turbine generator system, and the concrete technical scheme is as follows.

The utility model provides an offshore wind turbine high pile-steel pipe concrete composite structure cushion cap basis, includes composite structure cushion cap 1 and is used for supporting pile group 2 of composite structure cushion cap 1, its characterized in that, composite structure cushion cap 1 comprises interior steel pipe 3, outer steel pipe 4, stiffening steel sheet 5, end steel sheet 6, filled concrete 7, interior steel pipe 3 is located inside outer steel pipe 4, stiffening steel sheet 5 is located between interior steel pipe 3 with outer steel pipe 4, end steel sheet 6 is located interior steel pipe 3 with outer steel pipe 4 bottom, the hole 8 is left to the end steel sheet, pile group 2 upper portion is passed the hole 8 with composite structure cushion cap 1 is connected, composite structure cushion cap 1 is inside pours filled concrete 7.

The utility model adopts the steel-concrete composite structure bearing platform to replace the traditional concrete structure bearing platform, and the composite structure has good stress performance and high structural strength, thereby reducing the consumption of materials on the whole, avoiding assembling and disassembling templates and binding a large number of steel bars, effectively simplifying construction procedures, reducing construction difficulty and shortening construction period.

Alternatively, the composite structural cap 1 may be integrally prefabricated on land, towed to the sea for integral installation, and then cast in place with the filler concrete 7, except for the filler concrete 7. The steel structure part is integrally prefabricated on land, so that the construction process under the severe marine environment is simplified, the field construction difficulty is reduced, the engineering quality is improved, and the construction period is shortened.

Optionally, according to engineering requirements, the interior of the inner steel tube 3 may not be filled, so that the self weight of the bearing platform is reduced, the filled concrete 7 may also be poured to serve as a counterweight, and the structural strength is enhanced, but the filled concrete 7 needs to be poured between the inner steel tube 3 and the outer steel tube 4, so as to ensure reliable connection between the bearing platform and the pile group.

Optionally, the inner steel pipe 3, the outer steel pipe 4, the stiffening steel plate 5 and the bottom steel plate 6 may be welded or bolted.

Optionally, because the composite structure bearing platform 1 has good compatibility to the pile type, the grouped piles 2 can adopt PHC tubular piles or steel pipe piles, and the grouped piles 2 adopt oblique piles, so as to ensure good lateral resistance.

Optionally, the pile group 2 is connected with the filling concrete 7 through anchoring steel bars, core filling steel bars or studs 9, and can be selected according to specific engineering conditions.

Optionally, studs or stiffening ribs 10 are welded to the outer wall of the inner steel pipe 3 and the inner wall of the outer steel pipe 4, so as to enhance the integrity of the inner steel pipe 3, the outer steel pipe 4 and the filled concrete 7.

Optionally, the number of the stiffening steel plates 5 is not less than the number of the group piles 2, and the stiffening steel plates 5 are arranged between the group piles 2 at intervals.

Optionally, the center of the stiffening steel plate 5 is provided with a hole, so that the filling concrete 7 can be poured conveniently. The top and the bottom of the stiffening steel plate 5 are provided with holes for arranging circumferential reinforcing steel bars 11.

Optionally, a flange 12 is welded on the upper portion of the inner steel tube 3, and is used for being connected with an upper tower.

Optionally, the hole between the hole 8 and the pile group 2 is sealed by a hole sealing plate 13, an inner hole of the hole sealing plate 13 is circular or elliptical, and the hole sealing plate 13 is connected with the bearing platform 1 and the pile group 2 by welding or bolts.

The utility model adopts the steel-concrete composite structure bearing platform to replace the traditional concrete structure bearing platform, and compared with the traditional concrete structure bearing platform, the bearing platform has better stress performance and higher structural strength, thereby reducing the material use, avoiding assembling and disassembling templates and binding a large number of steel bars, effectively simplifying the construction process, reducing the construction difficulty and shortening the construction period. In addition, the steel structure part can be integrally prefabricated on land, so that the engineering quality is improved, the site construction process is further simplified, the construction difficulty is reduced, the construction period is integrally shortened, and the construction cost is reduced.

Drawings

FIG. 1 is a schematic top view of the present invention (with the fill concrete shown in perspective);

FIG. 2 is a schematic view of a sealing orifice plate according to the present invention;

FIG. 3 is a cross-sectional view taken along line 1-1 of FIG. 1;

fig. 4 is a cross-sectional view 2-2 of fig. 1.

In the figure: 1-bearing platform with combined structure, 2-pile group, 3-inner steel pipe, 4-outer steel pipe, 5-stiffening steel plate, 6-bottom steel plate, 7-filling concrete, 8-hole, 9-stud, 10-stud, 11-circumferential reinforcing steel bar, 12-upper flange and 13-hole sealing plate.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, 3 and 4, an embodiment of the present invention provides a bearing platform foundation of a high pile-steel pipe concrete composite structure for an offshore wind turbine, which includes a composite structure bearing platform 1 and a pile group 2 for supporting the composite structure bearing platform (1), where the composite structure bearing platform is composed of an inner steel pipe 3, an outer steel pipe 4, a stiffening steel plate 5, a bottom steel plate 6 and a filling concrete 7.

The inner steel pipe 3 is located inside the outer steel pipe 4, the stiffening steel plate 5 is located between the inner steel pipe 3 and the outer steel pipe 4, the bottom steel plate 6 is located between the inner steel pipe 3 and the outer steel pipe 4, a hole 8 is left in the bottom steel plate, the upper part of each pile group 2 penetrates through the hole 8, the filling concrete 7 is poured inside the composite structure bearing platform 1, and each pile group 2 and the composite structure bearing platform 1 are connected into a whole through the filling concrete 7.

Optionally, according to engineering requirements, the interior of the inner steel tube 3 may not be filled, so as to reduce the self weight of the bearing platform, and the filled concrete 7 may also be filled as a counterweight, so as to enhance the structural strength, but the filled concrete 7 needs to be poured between the inner steel tube 3 and the outer steel tube 4, so as to ensure reliable connection between the bearing platform and the pile group.

Optionally, the inner steel pipe 3, the outer steel pipe 4, the stiffening steel plate 5 and the bottom steel plate 6 may be connected into a whole by welding or bolts. The stiffening steel plates 5 and the bottom steel plates 6 are allowed to leave gaps, are not in direct contact and are not connected. If welding connection is used, chamfering treatment should be performed on two bottom corners of the stiffening steel plate so as to avoid welding defects caused by intersection of a plurality of welding lines.

Optionally, since the composite structure bearing platform 1 has good compatibility with the pile type, the pile group 2 may adopt a PHC pile or a steel pipe pile. And the grouped piles 2 are inclined piles, the inclination is usually 1:5-1:6, and other inclinations which are convenient for construction operation can also be adopted.

Optionally, the piles 2 may be connected to the filling concrete 7 through anchoring steel bars, core-filling steel bars or studs, and may be selected according to specific engineering conditions. The anchoring steel bars and the studs can be welded or embedded, and the core-filling steel bars need to be embedded and poured on site.

Optionally, studs or stiffening ribs 10 may be welded to the outer wall of the inner steel pipe 3 and the inner wall of the outer steel pipe 4 to enhance the integrity of the inner steel pipe 3, the outer steel pipe 4 and the filled concrete 7.

Optionally, the number of the stiffening steel plates 5 is not less than the number of the grouped piles 2, and the grouped piles 2 are arranged at intervals to ensure that force transmission between the composite structure bearing platform 1 and the grouped piles 2 is uniform.

Optionally, a hole is formed in the center of the stiffening steel plate 5, so that the filling concrete 7 can be poured conveniently. The top and the bottom of the stiffening steel plate 5 are provided with holes for arranging circumferential reinforcing steel bars 11. The circumferential reinforcing steel bars 11 and the stiffening steel plates 5 can be welded and connected.

Optionally, a flange 12 is welded on the upper portion of the inner steel tube 3, and is used for being connected with an upper tower. The inner steel tube is generally in a round tube shape and is conveniently connected with the upper tower barrel, and the outer steel tube can be in a proper shape according to pile group arrangement, and can be added with a certain inclination to be made into a circular truncated cone side wall shape.

Alternatively, the holes between the holes 8 and the piles 2 may be closed by using a hole sealing plate 13 as shown in fig. 2, the inner hole of the hole sealing plate 13 is a circle or an ellipse close to the horizontal cross-sectional shape of the piles 2, and the hole sealing plate 13 may be welded or bolted to the bearing platform 1 and the piles 2.

Optionally, during construction, the bottom steel plate 6 may be temporarily supported to bear construction load, and the supporting method may refer to a formwork supporting method. According to the strength of the temporary support, the filling concrete 7 can be poured for 1-2 times, and pouring is completed for 1 time as much as possible, so that the construction period is shortened.

The embodiments of the present invention are described above with reference to the drawings, and the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

It should be understood that the above-mentioned embodiments are only examples for clearly illustrating the utility model, and are not intended to limit the scope of the utility model, and all equivalent structures or equivalent flow transformations made by the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the utility model.

Claims

1. A high pile-steel pipe concrete composite structure bearing platform foundation of an offshore wind turbine comprises a composite structure bearing platform (1) and a pile group (2) for supporting the composite structure bearing platform (1), it is characterized in that the bearing platform (1) of the composite structure is composed of an inner steel pipe (3), an outer steel pipe (4), a stiffening steel plate (5), a bottom steel plate (6) and filling concrete (7), the inner steel pipe (3) is positioned inside the outer steel pipe (4), the stiffening steel plate (5) is positioned between the inner steel pipe (3) and the outer steel pipe (4), the bottom steel plate (6) is positioned at the bottom of the inner steel pipe (3) and the outer steel pipe (4), the bottom steel plate is provided with a hole (8), the upper part of the pile group (2) penetrates through the hole (8) to be connected with the bearing platform (1) of the composite structure, and the filling concrete (7) is poured inside the combined structure bearing platform (1).

2. The offshore wind turbine high pile-steel tube concrete composite structural bearing platform foundation of claim 1, characterized in that the composite structural bearing platform (1) is integrally prefabricated on land except for the filler concrete (7), and the filler concrete (7) is cast in place at sea.

3. The offshore wind turbine high pile-steel tube concrete composite structure bearing platform foundation according to claim 1, characterized in that the filling concrete (7) is hollow or poured inside the inner steel tube (3), and the filling concrete (7) is poured between the inner steel tube (3) and the outer steel tube (4).

4. The offshore wind turbine high pile-concrete filled steel tube composite structural bearing platform foundation of claim 1, wherein the inner steel tube (3), the outer steel tube (4), the stiffening steel plates (5) and the bottom steel plate (6) are connected by welding or bolts.

5. The offshore wind turbine high pile-steel pipe concrete composite structure bearing platform foundation of claim 1, wherein the piles (2) adopt PHC pipe piles or steel pipe piles, and the piles (2) are inclined piles.

6. The offshore wind turbine high pile-steel tube concrete composite structure bearing platform foundation of claim 1, characterized in that the piles (2) and the filling concrete (7) are connected through anchoring steel bars, core filling steel bars or studs (9).

7. The offshore wind turbine high pile-steel tube concrete composite structure bearing platform foundation of claim 1, characterized in that studs or stiffening ribs (10) are welded on the outer wall of the inner steel tube (3) and the inner wall of the outer steel tube (4).

8. The offshore wind turbine high pile-concrete filled steel tube composite structural bearing platform foundation according to claim 1, wherein the number of the stiffening steel plates (5) is not less than the number of the grouped piles (2), and the stiffening steel plates (5) are arranged at intervals among the grouped piles (2).

9. The offshore wind turbine high pile-concrete filled steel tube composite structural bearing platform foundation according to claim 1, wherein the center of the stiffening steel plate (5) is provided with a hole (8).

10. The offshore wind turbine high pile-concrete filled tube composite structural bearing platform foundation of claim 1, wherein the top and bottom of the stiffening steel plate (5) are provided with holes, and circumferential steel bars (11) are arranged in the holes.

11. The offshore wind turbine high pile-concrete filled steel tube composite structural bearing platform foundation according to claim 1, characterized in that a flange (12) is welded on the upper part of the inner steel tube (3).

12. The offshore wind turbine high pile-steel pipe concrete composite structure bearing platform foundation according to claim 1, wherein the hole between the hole (8) and the pile group (2) is closed by a hole sealing plate (13), the inner hole of the hole sealing plate (13) is circular or elliptical, and the hole sealing plate (13) is connected with the composite structure bearing platform (1) and the pile group (2) through welding or bolts.