Prefabricated prestressed concrete foundation for onshore wind turbines

Abstract

The present invention discloses an assembled prestressed concrete foundation for an onshore wind turbine generator set in the technical field of wind power generation equipment, comprising a plurality of fixed bottom rings and a support frame, wherein the plurality of fixed bottom rings are fixedly installed between the side walls through a prestressed mechanism, and the plurality of fixed bottom rings are arranged in a circular shape, and the plurality of prestressed mechanisms are fixedly installed to the side walls of the support frame, and the plurality of support frames are arranged linearly. In the present invention, the assembly of the plurality of fixed bottom rings can reduce the difficulty of assembly and transportation, and after the fixed bottom rings are assembled, the top hinge block can be driven to rotate by rotating the hinge seat, and the hinge block can adjust the connection angle with one side of the support frame through the first prestressed steel cable on the rear side and the first universal joint, and the assembly angle of the first prestressed steel cable can be quickly adjusted through the first universal joint that can be adjusted in multiple directions, thereby improving the rapid adjustment of the assembly angle and position, and realizing the adjustment and adaptation of the energy absorption angle of the support angle.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment, in particular to an assembled prestressed concrete foundation for an onshore wind turbine generator set. Background Art

[0002] With the development of science and technology, the exploitation of non-renewable resources has caused irreversible impacts on the environment. Traditional coal-fired power generation is gradually being replaced by new energy power generation technology. Wind power generation, as a clean energy, is gradually being taken seriously.

[0003] The prior art discloses some invention patents in the field of wind power generation equipment technology. Among them, the invention patent with application number CN103867019B discloses an assembled external prestressed active powder concrete wind power tower, which includes a foundation and several tower sections. The foundation is a reinforced concrete foundation with a pre-embedded foundation ring; each tower section is cast from active powder concrete and has a conical cylindrical shape; the inner side of each tower section is provided with several prestressed steel bars along the longitudinal direction; after tensioning, the upper end of the prestressed steel bars is anchored to the inner side of the upper end face of the tower, and the lower end is anchored to the foundation ring. The prestressed steel bars are evenly and equidistantly distributed along the inner wall of the tower. The above scheme has a reasonable structure, low manufacturing cost, is easy to transport and assemble, and has a high load-bearing capacity.

[0004] In actual use of the existing technology, the embedded foundation ring still occupies a large amount of transportation space. At the same time, the transmission effect between the tower and the base foundation during assembly is poor. Therefore, it lacks a certain stress absorption capacity for external impact and cannot meet the needs of use well.

[0005] Based on this, the present invention designs an assembled prestressed concrete foundation for an onshore wind turbine generator system to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an assembled prestressed concrete foundation for onshore wind turbines to solve the problem that the embedded foundation ring proposed in the above-mentioned background technology still occupies a large amount of transportation space, and at the same time, the transmission effect between the tower and the base foundation during assembly is poor, and therefore, there is a lack of certain stress absorption capacity against external impact.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: an assembled prestressed concrete foundation for an onshore wind turbine generator system, comprising a plurality of fixed bottom rings and a support frame, wherein the plurality of fixed bottom rings are fixedly installed between side walls by a prestressed mechanism, and the plurality of fixed bottom rings are arranged in a circular shape, and the plurality of prestressed mechanisms are fixedly installed to the side walls of the support frame, and the plurality of support frames are arranged in a linear shape, a side support mechanism is slidably connected to the inner cavity of the fixed bottom ring, the other end of the side support mechanism is connected to a protrusion on one side of the outer wall of the support frame, an energy absorbing mechanism is sleeved on the outer wall of the prestressed mechanism, and the energy absorbing mechanism is slidably connected to a connecting slot hole provided in the inner side wall of the support frame;

[0008] There are stepped connection parts on both sides of the fixed bottom ring, and a connecting groove is opened on one side of the stepped connection part. The prestressed mechanism includes a connecting frame, and the adjacent stepped connection parts are nested with the connecting frame. The top of the connecting frame is rotatably connected to the hinge seat through the bearing seat, and the inner wall of the hinge seat is hinged with a hinge block through a pin shaft. The top of the hinge block is fixedly connected to the first prestressed steel cable, and the other end of the first prestressed steel cable is fixedly installed on one side of the connecting hole opened on the inner wall of the support frame through a first universal joint.

[0009] As a further solution of the present invention, the cross-section of the connecting frame is U-shaped, and card holes are provided on both sides of the connecting frame and the side walls on both sides of the fixed bottom ring, and both ends of one side of the connecting frame are fixedly connected to support blocks, a sliding sleeve is embedded in one side of the support block, and a sliding rod is slidably connected in the sliding sleeve, one end of the sliding rod is fixedly connected to a handle, and the other end of the sliding rod is fixedly connected to a connecting plate, and the other side of the connecting plate is fixedly connected to a card block through a fixing rod, and the card block is clamped in the card holes on both sides of the connecting frame and the fixed bottom ring.

[0010] As a further solution of the present invention, a spring is sleeved on the outer wall of the sliding rod, and both ends of the spring are fixedly connected to corresponding positions on one side of the support block and the connecting frame respectively.

[0011] As a further solution of the present invention, a nut is embedded in the first universal joint away from the first prestressed steel cable, and a screw is connected to the inner thread of the nut, and the screw is inserted into a connecting slot on one side of the support frame.

[0012] As a further solution of the present invention, the energy absorbing mechanism includes an energy absorbing rod, both ends of which are fixedly connected to support side rods, the support side rod is inserted into a groove body opened on one side of the protruding portion of the support frame, and the other end of the support side rod is threadedly connected to a first connecting bolt, and one side of the first connecting bolt is in contact with one side of the outer wall of the protruding portion of the support frame, and one side of the energy absorbing rod is in contact with one side of the outer wall of the first prestressed steel cable for absorbing the offset stress of the first prestressed steel cable.

[0013] As a further solution of the present invention, one side of the energy absorbing rod is fixedly connected to an energy absorbing seat, one side of the energy absorbing seat is slidably connected to a rod body, and the rod body is limitedly connected to the connecting slot by bolts, and the inner cavity of the energy absorbing seat is fixedly connected to an abutment seat, one side of the abutment seat is fixedly connected to one end of the rod body, and arc-shaped abutment blocks are provided on both sides of the inner cavity of the abutment seat, and one side of the abutment block is in contact with one side of the first prestressed steel cable.

[0014] As a further solution of the present invention, the outer wall of the rod body is provided with a plurality of energy-absorbing gaskets for absorbing energy. The energy-absorbing gaskets are spring dampers, and both sides of the plurality of energy-absorbing gaskets are respectively fitted with corresponding positions of the abutment seat and one side of the energy-absorbing seat.

[0015] As a further solution of the present invention, the side support mechanism includes a second prestressed steel cable, one end of the second prestressed steel cable is fixedly connected to a connecting ring, the inner cavity of the connecting ring is slidably connected to a connecting anchor rod, both ends of the connecting anchor rod are rotatably connected to a rotating ball through a universal bearing, the end of the rotating ball away from the connecting anchor rod is fixedly connected to a second connecting bolt, the second connecting bolt is limit-connected to the groove body of the protruding part of the support frame at the corresponding position, and the second prestressed steel cable can be adjustably installed on one side of the inner wall of the fixed bottom ring.

[0016] As a further solution of the present invention, the side support mechanism also includes a slide, which is slidably connected to a slide groove opened on one side of the fixed bottom ring, and sliders are fixedly connected on both the top and bottom sides of the slide, and the slider is slidably connected to a limit groove opened in the inner cavity of the slide groove, and one side of the slide is fixedly connected to one end of the second prestressed steel cable through a second universal joint, and one side of the slide is fixedly connected to a connecting block, a nut is embedded in one side of the connecting block, and the inner thread of the nut is connected to a limiting bolt, and one end of the limiting bolt is in contact with one side of the inner cavity of the limiting groove.

[0017] As a further solution of the present invention, the cross-sectional shape of the support frame is hexagonal, and a plurality of connection holes are opened through the top angle of the support frame, and the connection holes are inserted and connected with support ribs, and the groove bodies of adjacent protrusions of the support frame are fixedly connected by rivet blocks.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The cam is fixedly mounted on a support frame, and the cam is fixedly mounted on a support frame, and the cam is fixedly mounted on a support frame, and the cam is fixedly mounted on the support frame.

[0020] 2. In the present invention, after the supporting side rods are installed into the protruding parts of the supporting frames on both sides, the energy-absorbing rods can be pressed and contacted with the first prestressed steel cable, and the energy-absorbing rods of multiple groups of devices are used to fully abut and apply energy to the outer wall of the first prestressed steel cable. After the energy-absorbing rods are assembled, the abutment seat on the inner side of the energy-absorbing rods is installed on the outside of the first prestressed steel cable. When the first prestressed steel cable moves under force, the abutment seat can be pulled to squeeze the rear rod body and the energy-absorbing gasket. The energy-absorbing gasket can use its own elastic resistance to absorb the stress generated by the impact, and after the impact is transmitted, it uses the elastic force of the energy-absorbing spring sheet and the prestress of the first prestressed steel cable itself to reset, thereby realizing deformation absorption and autonomous reset of external impact, thereby improving the energy absorption processing effect.

[0021] 3. In the present invention, after the hinge block is twisted to move and separate from the inner side of the slide groove, the slide plate is pulled to slide through the slider. The slider can prevent the slide plate from being separated from the slide groove when moving. When the slide plate moves, it can drive the second universal joint and the second prestressed steel cable to adjust the relative angle of the rear connecting anchor rod. The second prestressed steel cable can improve the lateral energy absorption strength of the concrete foundation after casting through lateral traction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the structure of the enlarged part A;

[0024] Figure 3 For the present invention Figure 1 A schematic diagram of the structure of the enlarged portion B;

[0025] Figure 4 It is a schematic diagram of the horizontal structure of the present invention;

[0026] Figure 5This is a schematic diagram of the explosive splitting structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the present invention from a top view;

[0028] Figure 7 For the present invention Figure 6 The enlarged structural diagram of part C in the middle;

[0029] Figure 8 It is a schematic structural diagram of the side support mechanism of the present invention.

[0030] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0031] 1. Fixed bottom ring; 2. Prestressed mechanism; 201. Connecting frame; 202. Bearing seat; 203. Articulated seat; 204. Articulated block; 205. First prestressed steel cable; 206. First universal joint; 207. Connecting plate; 208. Support block; 209. Sliding rod; 210. Clamping block; 211. Fixed rod; 212. Spring; 3. Support frame; 4. Riveted block; 5. Energy absorbing mechanism; 501. Energy absorbing rod; 502. Support Side rod; 503, first connecting bolt; 504, energy absorbing seat; 505, abutment seat; 506, energy absorbing gasket; 6, side support mechanism; 601, second prestressed steel cable; 602, second universal joint; 603, slide plate; 604, slider; 605, connecting block; 606, limit bolt; 607, connecting anchor rod; 608, connecting ring; 609, second connecting bolt; 610, rotating ball; 7, connecting slot; 8, connecting hole. DETAILED DESCRIPTION

[0032] See also Figure 1-8 The present invention provides a technical solution: an assembled prestressed concrete foundation for an onshore wind turbine generator system, comprising a plurality of fixed bottom rings 1 and a support frame 3. The plurality of fixed bottom rings 1 are fixedly installed between side walls through a prestressed mechanism 2, and the plurality of fixed bottom rings 1 are arranged in a circular shape, wherein the fixed bottom ring 1 is configured as a mesh ring, and a foundation is formed by pouring concrete after assembly, and the plurality of prestressed mechanisms 2 are fixedly installed on the side walls of the support frame 3, and the plurality of support frames 3 are arranged linearly, the inner cavity of the fixed bottom ring 1 is slidably connected to a side support mechanism 6, and the other end of the side support mechanism 6 is connected to a protruding portion on one side of the outer wall of the support frame 3, the outer wall of the prestressed mechanism 2 is sleeved with an energy absorbing mechanism 5, and the energy absorbing mechanism 5 is slidably connected to a connecting slot 7 opened on the inner wall of the support frame 3;

[0033] There are stepped connection parts on both sides of the fixed bottom ring 1, and a connecting groove is opened on one side of the stepped connection part. The prestressed mechanism 2 includes a connecting frame 201, and the adjacent stepped connection parts are nested with the connecting frame 201. The top of the connecting frame 201 is rotatably connected to the hinge seat 203 through the bearing seat 202. The inner wall of the hinge seat 203 is hinged with a hinge block 204 through a pin shaft. The top of the hinge block 204 is fixedly connected to the first prestressed steel cable 205. The other end of the first prestressed steel cable 205 is fixedly installed on one side of the connecting hole 8 opened on the inner wall of the support frame 3 through the first universal joint 206.

[0034] The cross section of the connecting frame 201 is U-shaped, and the side walls of both sides of the connecting frame 201 and the fixed bottom ring 1 are provided with card holes, and both ends of one side of the connecting frame 201 are fixedly connected to support blocks 208, one side of the support block 208 is embedded with a sliding sleeve, and a sliding rod 209 is slidably connected in the sliding sleeve, one end of the sliding rod 209 is fixedly connected to a handle, and the other end of the sliding rod 209 is fixedly connected to a connecting plate 207, and the other side of the connecting plate 207 is fixedly connected to a card block 210 through a fixed rod 211. The card block 210 is clamped in the card holes on both sides of the connecting frame 201 and the fixed bottom ring 1, and the sliding rod 209 is fixedly connected to the handle. 09 A spring 212 is sleeved on the outer wall, and both ends of the spring 212 are fixedly connected to the corresponding positions of the support block 208 and the connecting frame 201 on one side. The first universal joint 206 is embedded with a nut away from the first prestressed steel cable 205, and the inner thread of the nut is connected to a screw rod, and the screw rod is passed through the connecting slot 7 on one side of the support frame 3. The cross-sectional shape of the support frame 3 is hexagonal, and a plurality of connecting holes 8 are opened through the top angle of the support frame 3, and the connecting holes 8 are inserted and connected with supporting ribs, and the groove bodies of the protruding parts of adjacent support frames 3 are fixedly connected by rivet blocks 4.

[0035] The specific implementation method is as follows: after multiple fixed bottom rings 1 are assembled, the fixed bottom rings 1 can be formed into a circular base, and after the fixed bottom rings 1 are assembled, the connecting plate 207 can be driven to move by pushing the sliding rods 209 on both sides, and the movement of the connecting plate 207 can drive the clamping block 210 to move outward, and after the connecting frame 201 is inserted between the protruding parts of the fixed bottom rings 1 on both sides, by loosening the handle, the spring 212 can use its own tension to drive the connecting plate 207 and the clamping block 210 to be clamped into the groove body opened on one side of the protruding part of the fixed bottom ring 1, so that the connection limit of the fixed bottom ring 1 can be achieved through the connecting frame 201 and the clamping block 210, and the elastic force of the spring 212 can absorb multiple The impact error during the assembly of the fixed bottom ring 1 is reduced, and the assembly accuracy is improved. The assembly of multiple fixed bottom rings 1 can reduce the difficulty of assembly and transportation, and after the fixed bottom ring 1 is assembled, the top hinge block 204 can be driven to rotate by rotating the hinge seat 203. The hinge block 204 can adjust the connection angle with one side of the support frame 3 through the rear first prestressed steel cable 205 and the first universal joint 206. The assembly angle of the first prestressed steel cable 205 can be quickly adjusted through the multi-directionally adjustable first universal joint 206, thereby improving the rapid adjustment of the assembly angle and position, and through the adjustment support of the first prestressed steel cable 205, the adjustment adaptation of the energy absorption angle of the support angle is achieved.

[0036] The energy absorbing mechanism 5 includes an energy absorbing rod 501, both ends of the energy absorbing rod 501 are fixedly connected to a supporting side rod 502, the supporting side rod 502 is inserted into a groove body opened on one side of the protruding portion of the supporting frame 3, and the other end of the supporting side rod 502 is threadedly connected to a first connecting bolt 503, and one side of the first connecting bolt 503 is in contact with one side of the outer wall of the protruding portion of the supporting frame 3, and one side of the energy absorbing rod 501 is in contact with one side of the outer wall of the first prestressed steel cable 205 for absorbing the offset stress of the first prestressed steel cable 205, and one side of the energy absorbing rod 501 is fixedly connected to an energy absorbing seat 504, and the energy absorbing seat 50 4 is slidably connected to one side of the rod body, and the rod body is connected to the connecting slot 7 by a bolt limiter. The inner cavity of the energy absorbing seat 504 is fixedly connected to the abutment seat 505. One side of the abutment seat 505 is fixedly connected to one end of the rod body. Arc-shaped abutment blocks are provided on both sides of the inner cavity of the abutment seat 505, and one side of the abutment block fits with one side of the first prestressed steel cable 205. A plurality of energy-absorbing gaskets 506 for energy absorption are provided on the outer wall of the rod body. The energy-absorbing gasket 506 is a spring 212 damper, and the two sides of the plurality of energy-absorbing gaskets 506 are respectively fitted with the corresponding positions of the abutment seat 505 and one side of the energy-absorbing seat 504.

[0037] The specific implementation method is as follows: through the designed energy-absorbing mechanism 5, after the supporting side rods 502 are installed into the protruding parts of the supporting frames 3 on both sides, the energy-absorbing rods 501 can be pressed into contact with the first prestressed steel cable 205, so that the energy-absorbing rods 501 of multiple sets of devices can fully abut and apply energy to the outer wall of the first prestressed steel cable 205, and after the energy-absorbing rods 501 are assembled, the abutment seat 505 on the inner side of the energy-absorbing rods 501 can be sleeved on the outside of the first prestressed steel cable 205, and when the first prestressed steel cable 205 is moved under force, the abutment seat 505 can be pulled to squeeze the rear rod body and the energy-absorbing gasket 506, and the energy-absorbing gasket 506 can use its own elastic force The damper absorbs the stress generated by the impact, and after the impact is transmitted, the elastic force of the energy-absorbing spring and the prestressed force of the first prestressed steel cable 205 are used to reset the cable, thereby realizing deformation absorption and autonomous reset of the external impact, and improving the energy absorption processing effect. Through the designed abutment seat 505, the abutment seat 505 can use the inner curved surface to ensure the contact strength with the first prestressed steel cable 205, and reduce the influence of hard friction during contact on the outer wall of the first prestressed steel cable 205. At the same time, through the designed supporting side rod 502 and the first connecting bolt 503, the relative axial position of the rear abutment seat 505 can be adjusted to improve the efficiency of energy absorption.

[0038] The side support mechanism 6 includes a second prestressed steel cable 601, one end of the second prestressed steel cable 601 is fixedly connected to a connecting ring 608, the inner cavity of the connecting ring 608 is slidably connected to a connecting anchor rod 607, both ends of the connecting anchor rod 607 are rotatably connected to a rotating ball 610 through a universal bearing, and the end of the rotating ball 610 away from the connecting anchor rod 607 is fixedly connected to a second connecting bolt 609, and the second connecting bolt 609 is limit-connected in the groove body of the protruding part of the support frame 3 at the corresponding position. The second prestressed steel cable 601 can be adjustably installed on one side of the inner wall of the fixed bottom ring 1, and the side support mechanism Structure 6 also includes a slide 603, which is slidably connected to a slide groove opened on one side of the fixed bottom ring 1, and sliders 604 are fixedly connected to both the top and bottom sides of the slide 603. The slider 604 is slidably connected to a limit groove opened in the inner cavity of the slide groove. One side of the slide 603 is fixedly connected to one end of the second prestressed steel cable 601 through the second universal joint 602, and one side of the slide 603 is fixedly connected to a connecting block 605. A nut is embedded in one side of the connecting block 605, and the inner thread of the nut is connected to a limit bolt 606, and one end of the limit bolt 606 is in contact with one side of the inner cavity of the limit groove.

[0039] The specific implementation method is as follows: after being separated from the inner side of the slide groove by twisting the hinge block 204, the slide plate 603 can be pulled through the slider 604 to slide, and the slider 604 can prevent the slide plate 603 from being separated from the slide groove when moving, and when the slide plate 603 moves, it can drive the second universal joint 602 and the second prestressed steel cable 601 to adjust the relative angle of the rear connecting anchor rod 607, and the second prestressed steel cable 601 can improve the lateral energy absorption strength of the concrete foundation after casting through lateral traction, and through the designed connecting ring 608, the adaptability of the connection angle between the connecting anchor rod 607 and the second prestressed steel cable 601 can be improved through the connecting ring 608, and through the designed second universal joint 602, the stress support position of the second prestressed steel cable 601 for lateral energy absorption can be conveniently adjusted, thereby improving the adjustment adaptability function.

[0040] Working principle: After multiple fixed bottom rings 1 are assembled, the fixed bottom rings 1 are formed into a circular base. After the fixed bottom rings 1 are assembled, the connecting plate 207 is driven to move by pushing the sliding rods 209 on both sides, and the movement of the connecting plate 207 drives the clamping block 210 to move outward. After the connecting frame 201 is inserted between the protruding parts of the fixed bottom rings 1 on both sides, by loosening the handle, the spring 212 uses its own tension to drive the connecting plate 207 and the clamping block 210 to be clamped into the groove body opened on one side of the protruding part of the fixed bottom ring 1 for connection. The contact limiter absorbs the impact error during the assembly of multiple fixed bottom rings 1 through the elastic force of the spring 212. After the fixed bottom ring 1 is assembled, the top hinge block 204 is driven to rotate by rotating the hinge seat 203. The hinge block 204 adjusts the connection angle with one side of the support frame 3 through the rear first prestressed steel cable 205 and the first universal joint 206. The assembly angle of the first prestressed steel cable 205 is quickly adjusted through the multi-directionally adjustable first universal joint 206, thereby improving the rapid adjustment of the assembly angle and position.

[0041] After the supporting side rods 502 are installed into the protruding parts of the supporting frames 3 on both sides, the energy absorbing rod 501 is pressed into contact with the first prestressed steel cable 205. The energy absorbing rod 501 of the multiple sets of devices fully abuts and applies energy to the outer wall of the first prestressed steel cable 205. After the energy absorbing rod 501 is assembled, the abutment seat 505 on the inner side of the energy absorbing rod 501 is sleeved on the outside of the first prestressed steel cable 205. When the first prestressed steel cable 205 is moved under force, the abutment seat 505 is pulled to squeeze the rear rod body and the energy absorbing gasket 506. The energy absorbing gasket 506 uses its own elastic resistance to absorb the stress generated by the impact. After the impact is transmitted, it uses the elastic force of the energy absorbing spring and the prestressed force of the first prestressed steel cable 205 itself to reset, thereby absorbing the deformation of the external impact and self-resetting.

[0042] After the hinge block 204 is twisted to move and separate from the inner side of the slide groove, the slide plate 603 is pulled to slide through the slider 604. The slider 604 prevents the slide plate 603 from being separated from the slide groove when moving. When the slide plate 603 moves, it drives the second universal joint 602 and the second prestressed steel cable 601 to adjust the relative angle of the rear connecting anchor rod 607. The second prestressed steel cable 601 improves the lateral energy absorption strength of the concrete foundation after casting through lateral traction, and improves the adaptability of the connection angle of the connecting anchor rod 607 and the second prestressed steel cable 601 through the connecting ring 608.

Claims

1. An assembled prestressed concrete foundation for an onshore wind turbine generator system, comprising a plurality of fixed bottom rings (1) and a support frame (3), characterized in that: The side walls of the plurality of fixed bottom rings (1) are fixedly installed via a prestressed mechanism (2), and the plurality of fixed bottom rings (1) are arranged in a circular shape, and the plurality of prestressed mechanisms (2) are fixedly installed on the side walls of the support frames (3), and the plurality of support frames (3) are arranged in a linear shape, the inner cavity of the fixed bottom ring (1) is slidably connected to a side support mechanism (6), the other end of the side support mechanism (6) is connected to a protruding portion on one side of the outer wall of the support frame (3), the outer wall of the prestressed mechanism (2) is sleeved with an energy absorbing mechanism (5), and the energy absorbing mechanism (5) is slidably connected to a connection slot (7) provided on the inner wall of the support frame (3); Both sides of the fixed bottom ring (1) are provided with stepped connection parts, and a connection groove is opened on one side of the stepped connection part. The prestressed mechanism (2) includes a connecting frame (201), and the adjacent stepped connection parts are nested with the connecting frame (201). The top of the connecting frame (201) is rotatably connected to a hinge seat (203) through a bearing seat (202). The inner wall of the hinge seat (203) is hinged to a hinge block (204) through a pin shaft. The top of the hinge block (204) is fixedly connected to a first prestressed steel cable (205). The other end of the first prestressed steel cable (205) is fixedly installed on one side of a connection hole (8) opened on the inner wall of the support frame (3) through a first universal joint (206); The energy absorbing mechanism (5) comprises an energy absorbing rod (501), both ends of the energy absorbing rod (501) are fixedly connected to support side rods (502), the support side rod (502) is inserted into a groove body opened on one side of the protruding portion of the support frame (3), and the other end of the support side rod (502) is threadedly connected to a first connecting bolt (503), and one side of the first connecting bolt (503) is in contact with one side of the outer wall of the protruding portion of the support frame (3), and one side of the energy absorbing rod (501) is in contact with one side of the outer wall of the first prestressed steel cable (205) for absorbing the offset stress of the first prestressed steel cable (205); One side of the energy absorbing rod (501) is fixedly connected to an energy absorbing seat (504), one side of the energy absorbing seat (504) is slidably connected to a rod body, and the rod body is connected to the connecting slot (7) by a bolt limiter, and the inner cavity of the energy absorbing seat (504) is fixedly connected to an abutment seat (505), one side of the abutment seat (505) is fixedly connected to one end of the rod body, and arc-shaped abutment blocks are provided on both sides of the inner cavity of the abutment seat (505), and one side of the abutment block is in contact with one side of the first prestressed steel cable (205).

2. The prestressed concrete foundation for an onshore wind turbine according to claim 1, characterized in that: The cross-section of the connecting frame (201) is U-shaped, and both sides of the connecting frame (201) and the side walls of the fixed bottom ring (1) are provided with clamping holes, and both ends of one side of the connecting frame (201) are fixedly connected to support blocks (208), a sliding sleeve is embedded in one side of the support block (208), and a sliding rod (209) is slidably connected in the sliding sleeve, one end of the sliding rod (209) is fixedly connected to a handle, and the other end of the sliding rod (209) is fixedly connected to a connecting plate (207), and the other side of the connecting plate (207) is fixedly connected to a clamping block (210) through a fixing rod (211), and the clamping block (210) is clamped in the clamping holes on both sides of the connecting frame (201) and the fixed bottom ring (1).

3. The prestressed concrete foundation for an onshore wind turbine according to claim 2, characterized in that: A spring (212) is sleeved on the outer wall of the slide rod (209), and two ends of the spring (212) are fixedly connected to corresponding positions on one side of the support block (208) and the connecting frame (201), respectively.

4. The prestressed concrete foundation for an onshore wind turbine according to claim 1, characterized in that: The first universal joint (206) is embedded with a nut away from the first prestressed steel cable (205), and the inner thread of the nut is connected to a screw rod, and the screw rod is inserted into a connecting slot (7) on one side of the support frame (3).

5. The assembled prestressed concrete foundation for an onshore wind turbine according to claim 1, characterized in that: The outer wall of the rod body is provided with a plurality of energy-absorbing gaskets (506) for absorbing energy, wherein the energy-absorbing gaskets (506) are spring (212) damping plates, and both sides of the plurality of energy-absorbing gaskets (506) are respectively fitted with corresponding positions on one side of the abutting seat (505) and the energy-absorbing seat (504).

6. The assembled prestressed concrete foundation for an onshore wind turbine according to claim 1, characterized in that: The side support mechanism (6) includes a second prestressed steel cable (601), one end of the second prestressed steel cable (601) is fixedly connected to a connecting ring (608), the inner cavity of the connecting ring (608) is slidably connected to a connecting anchor rod (607), both ends of the connecting anchor rod (607) are rotatably connected to a rotating ball (610) through a universal bearing, and the end of the rotating ball (610) away from the connecting anchor rod (607) is fixedly connected to a second connecting bolt (609), the second connecting bolt (609) is limit-connected to the groove body of the protruding part of the support frame (3) at the corresponding position, and the second prestressed steel cable (601) can be adjustably installed on one side of the inner wall of the fixed bottom ring (1).

7. The assembled prestressed concrete foundation for an onshore wind turbine according to claim 6, characterized in that: The side support mechanism (6) further comprises a slide plate (603), wherein the slide plate (603) is slidably connected to a slide groove opened on one side of the fixed bottom ring (1), and sliders (604) are fixedly connected to both the top and bottom sides of the slide plate (603), and the sliders (604) are slidably connected to a limiting groove opened in the inner cavity of the slide groove, and one side of the slide plate (603) is fixedly connected to one end of the second prestressed steel cable (601) through a second universal joint (602), and one side of the slide plate (603) is fixedly connected to a connecting block (605), and one side of the connecting block (605) is embedded with a nut, and the inner thread of the nut is connected to a limiting bolt (606), and one end of the limiting bolt (606) is in contact with one side of the inner cavity of the limiting groove.

8. The assembled prestressed concrete foundation for an onshore wind turbine according to claim 1, characterized in that: The support frame (3) has a hexagonal cross-sectional shape, and a plurality of connection holes (8) are provided through the top angle of the support frame (3), and support ribs are inserted and connected to the connection holes (8), and the groove bodies of the protruding parts of adjacent support frames (3) are fixedly connected by riveting blocks (4).

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