Supporting pile structure for fan foundation

Abstract

The supporting pile structure comprises a supporting pile, a bearing platform and a cushion layer, the supporting pile comprises a supporting part A and a supporting part B, the supporting part A is connected with the supporting part B, the supporting part A penetrates through the cushion layer and then is connected with the bearing platform, one end of the supporting part B is connected with the supporting part A, and the other end of the supporting part B is connected with the bearing platform. And the bearing platform is arranged on the cushion layer. The use stability of the bearing platform in the rainy and humid environment is improved by adding the cushion layer, the supporting performance is improved by arranging the fixing pipe and the supporting body of the supporting part A, the stability of the bearing platform is further improved by arranging the supporting part B, the supporting part can be prepared by directly embedding the fixing pipe in the construction process, and the construction cost is reduced. And the construction efficiency is improved. The utility model has better pulling resistance, compression resistance and horizontal bearing capacity.

Description

Technical Field

[0001] The utility model belongs to the technical field of supporting piles, and in particular relates to a supporting pile structure for a wind turbine foundation. Background Art

[0002] Wind power foundations can be divided into gravity foundations, single pile foundations, multi-column foundations, suction foundations, etc. according to their structures. Currently, the single pile foundations of bored cast-in-place are mostly used. The bearing capacity of the pile foundation is improved by pre-embedded steel cages and pouring concrete. However, the construction efficiency of this method is low. If it is adapted to rainy and humid environments, the foundation piles should also have good horizontal bearing capacity and compressive ultimate bearing capacity. Therefore, a supporting pile structure with high construction efficiency and strong horizontal bearing capacity is needed.

[0003] The patent document with the announcement number CN210658424U discloses an offshore high pile cap wind turbine foundation. The offshore high pile cap wind turbine foundation includes a concrete cap and a pipe pile, the pipe pile is a PHC pipe pile, the concrete cap and the pipe pile are connected by core-filled steel bars, the upper section of the core-filled steel bars are located inside the concrete cap, the lower section of the core-filled steel bars are located inside the top of the pipe pile, and the core-filled steel bars and the pipe pile are connected and fixed by core-filled concrete. The offshore high pile cap wind turbine foundation provided by the utility model adopts PHC pipe piles to replace steel pipe piles, so that the pile foundation is not corroded by seawater or is less affected by corrosion without using anti-corrosion coatings and sacrificial anode blocks, thereby ensuring the safety and stability of the wind turbine foundation; at the same time, core-filled steel bars and core-filled concrete are used to achieve efficient connection between the pipe pile and the cap. However, the utility model is suitable for the construction of wind turbines, and is inclined, so it is not suitable for use on land. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a supporting pile structure for a wind turbine foundation.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides a supporting pile structure for a wind turbine foundation, comprising a supporting pile, a cap and a cushion layer, wherein the supporting pile comprises a supporting portion A and a supporting portion B, wherein the supporting portion A is connected to the cap after penetrating the cushion layer, wherein one end of the supporting portion B is connected to the supporting portion A, and the other end of the supporting portion B is connected to the cap, and the cap is arranged on the cushion layer.

[0007] Preferably, the support part A includes a fixed tube, a support body and a support frame. The support body is arranged in the fixed tube. A fixed plate is arranged at the bottom of the support body. The fixed plate is circular and connected to the inner wall of the fixed tube. The support frame is arranged in the support body.

[0008] Preferably, the support frame includes support member A, support member B and support member C, the support member A is vertically arranged, and a plurality of support members A are arranged in a ring-shaped distribution with the circle of the fixed tube as the center, the support member B is circular, support member A is connected to the inner wall of support member B, and the support member C is cross-shaped and arranged on the top of the support body, and the support frame is welded to the fixed plate.

[0009] Preferably, a support member D is provided inside the fixed tube, and an end plate is provided on the top of the fixed tube.

[0010] Preferably, the support portion B is in a truncated cone shape, and the support portion B includes a support member A and a support member B. The support member A is arranged at an angle, and the support member B is circular, and the support member A is connected to the inner wall of the support member B.

[0011] Preferably, the support member A is inclined at an angle of 10-30 degrees to the vertical direction.

[0012] Preferably, the top area of ​​the support portion B is larger than the bottom area.

[0013] The beneficial effects of the utility model are:

[0014] The utility model improves the stability of the platform in rainy and humid environments by adding a cushion layer, improves the support performance by setting the fixed pipe and the support body of the support part A, and further improves the stability of the platform by setting the support part B. During the construction process, the fixed pipe can be directly buried to prepare the support part, thereby improving the construction efficiency. The utility model has good pull-out resistance, compression resistance, and horizontal bearing capacity, and the pull-out resistance and compression resistance limit bearing capacity of a single pile are not less than 900kN and 4400kN. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the BB section of the utility model;

[0017] In the figure: 1-support pile, 2-cap, 3-cushion, 4-support part A, 41-fixed pipe, 42-support body, 43-fixed plate, 44-support member D, 45-end plate, 5-support part B, 6-support frame, 61-support member C, 7-support member A, 8-support member B. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0019] Example:

[0020] like Figure 1, 2 As shown, a support pile structure for wind turbine foundation includes a support pile 1, a cap 2 and a cushion layer 3. The support pile 1 includes a support portion A4 and a support portion B5, and the support portion A4 is connected to the cap 2 after passing through the cushion layer 3. One end of the support portion B5 is connected to the support portion A4, and the other end of the support portion B5 is connected to the cap 2. The cap 2 is arranged on the cushion layer 3, and the cushion layer 3 can be concrete to enhance the support stability of the cap 2. A plurality of support piles 1 are arranged at the bottom of the cap 2.

[0021] The support part A4 includes a fixed pipe 41, a support body 42 and a support frame 6. The support body 42 is arranged in the fixed pipe 41. A fixed plate 43 is arranged at the bottom of the support body 42. The fixed plate 43 is circular and connected to the inner wall of the fixed pipe 41. The support frame 6 is arranged in the support body 42. The fixed pipe 41 is a concrete pipe pile. The fixed pipe 41 extends into the base 2 for 100 mm to form a connection to increase stability. The support body 42 is made of C45 fine stone concrete. The support frame 6 plays a role in strengthening the performance of the support part A4.

[0022] The support frame 6 includes support member A7, support member B8 and support member C61. The support member A7 is vertically arranged. A plurality of support members A7 are arranged in a circular shape with the fixed tube 41 as the center. The support member B8 is circular. A plurality of support members B8 are arranged from top to bottom along the support body 42. The support member A7 is connected to the inner wall of the support member B8. The support member C61 is arranged in a cross shape on the top of the support body 42 to strengthen the connection stability with the support portion B5. The support frame 6 is welded to the fixed plate 43. The fixed plate 43 is used to stabilize the support portion A4 in the fixed tube 41. The support members A7, the support members B8 and the support member C61 can be steel bars.

[0023] A support member D44 is arranged in the fixed tube 41 , and the support member D44 may be a prestressed steel bar. An end plate 45 is arranged on the top of the fixed tube 41 , and the end plate 45 may be a steel plate for strengthening the connection stability with the support portion B5 . The support member C61 is connected to the top of the end plate 45 .

[0024] The support part B5 is in a truncated cone shape, and the support part B5 includes a support member A7 and a support member B8. The support member A7 is arranged at an angle, and the support member B8 is circular. Several support members B8 are arranged on the support part B5 from top to bottom. The diameter of the support member B8 is set according to the inclination of the support member A7 at the height. The support member A7 is connected to the inner wall of the support member B8, and the support member A7 on the support part B5 is connected to the support member A7 on the support frame 6. The support members A7 at the two locations can also be the same steel bar but are arranged at an angle at the position of the support part B5.

[0025] The support member A7 is inclined at an angle of 10-30 degrees to the vertical direction, and 15 degrees is preferred in this embodiment, so as to make the support portion B5 truncated cone-shaped.

[0026] The top area of ​​the support portion B5 is larger than the bottom area, thereby increasing the connection stability between the support portion B5 and the support platform 2.

[0027] The verticality deviation of the supporting pile 1 of the utility model is ≤0.5%. The length of the fixed pipe 41 needs to be ≥11m. When the thickness of the replacement soil at the bottom of the pedestal 2 is ≤2m, the length of the fixed pipe 41 does not need to be increased; when the thickness is 2-4m, the length of the fixed pipe 41 increases by 1m. The characteristic values ​​of the pull-out, compression and horizontal bearing capacity of the utility model are 450kN, 2200kN and 60kN respectively. The pull-out and compression ultimate bearing capacity of a single pile is not less than 900kN and 4400kN.

Claims

1. A supporting pile structure for a wind turbine foundation, characterized in that: The invention comprises a support pile (1), a capping platform (2) and a cushion layer (3), wherein the support pile (1) comprises a support portion A (4) and a support portion B (5), wherein the support portion A (4) and the support portion B (5) are connected, wherein the support portion A (4) penetrates the cushion layer (3) and is connected to the capping platform (2), wherein one end of the support portion B (5) is connected to the support portion A (4), and the other end of the support portion B (5) is connected to the capping platform (2), and the capping platform (2) is arranged on the cushion layer (3).

2. A support pile structure for a wind turbine foundation according to claim 1, characterized in that: The support portion A (4) comprises a fixed tube (41), a support body (42) and a support frame (6); the support body (42) is arranged in the fixed tube (41); a fixed plate (43) is arranged at the bottom of the support body (42); the fixed plate (43) is circular and connected to the inner wall of the fixed tube (41); and the support frame (6) is arranged in the support body (42).

3. A supporting pile structure for a wind turbine foundation according to claim 2, characterized in that: The support frame (6) comprises a support member A (7), a support member B (8) and a support member C (61); the support member A (7) is arranged vertically; a plurality of support members A (7) are arranged in a circular shape with the fixed tube (41) as the center; the support member B (8) is circular; the support member A (7) is connected to the inner wall of the support member B (8); the support member C (61) is arranged in a cross shape on the top of the support body (42); and the support frame (6) is welded to the fixed plate (43).

4. A supporting pile structure for a wind turbine foundation according to claim 2, characterized in that: A support member D (44) is arranged inside the fixed tube (41), and an end plate (45) is arranged on the top of the fixed tube (41).

5. A supporting pile structure for a wind turbine foundation according to claim 1, characterized in that: The support portion B (5) is in a truncated cone shape, and includes a support member A (7) and a support member B (8). The support member A (7) is arranged obliquely, and the support member B (8) is in a circular shape. The support member A (7) is connected to the inner wall of the support member B (8).

6. A supporting pile structure for a wind turbine foundation according to claim 5, characterized in that: The support member A (7) is inclined at an angle of 10-30 degrees to the vertical direction.

7. A supporting pile structure for a wind turbine foundation as claimed in claim 5, characterized in that: The top area of ​​the support portion B (5) is larger than the bottom area.

Images