Inner formwork supporting device and method for overall pouring of wind power mixed tower foundation

Abstract

The invention belongs to the technical field of new energy electric power engineering construction, and particularly relates to an inner formwork supporting device and method for overall pouring of a wind power mixed tower foundation. An inner formwork supporting device for integral pouring of a wind power mixed tower foundation comprises a center fixing pile, horizontal adjustable supports and vertical adjustable supports, the center fixing pile is provided with multiple layers of horizontal supports from top to bottom, each layer of horizontal supports is provided with multiple horizontal adjustable supports, one ends of the horizontal adjustable supports are fixedly connected with the center fixing pile, and the other ends of the horizontal adjustable supports are fixedly connected with the vertical adjustable supports. The vertical adjustable supports are distributed along the circumferential edge of the lower portion of the to-be-poured inner formwork, one end of each vertical adjustable support is connected with a bottom plate of the to-be-poured inner formwork, and the other end of each vertical adjustable support is in contact with an inner top plate of the to-be-poured inner formwork. The inner formwork to be poured is supported through the horizontal adjustable supports and the vertical adjustable supports, the roundness and the forming quality of a concrete cavity in a foundation can be ensured, and the construction efficiency and the acceptance pass rate are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy power engineering construction, and particularly relates to an internal formwork support device and method for integral pouring of a wind power hybrid tower foundation. Background Art

[0002] In recent years, wind power generation projects have developed rapidly. Wind turbines have been rapidly promoted from coastal, mountainous, and plateau areas to plain areas, and the fan concrete tower barrel technology has emerged accordingly. Since the key process of hybrid tower construction is the installation of prestressed cables, compared with the solid foundation of steel tower barrels, prestressed cable ducts are reserved inside the hybrid tower foundation. At the same time, prestressed cable installation operations need to be carried out inside the foundation, and the form is changed to a frustum cavity structure. In addition to the outer formwork, an internal circumferential inner formwork is added.

[0003] At present, most of the existing construction technologies rely on the mutual extrusion of the internal fixed steel formwork after forming as a whole, and only rely on the arch force of the formwork itself as support. It is extremely easy to have problems such as local deformation and even form bulging, which cannot guarantee the roundness of the foundation and the stability of the formwork system, reduce the embedding accuracy of the prestressed cable embedded ducts, and affect the installation of prestressed cables. Moreover, relying on the self-extrusion of the fixed steel formwork to bear the lateral force of concrete will cause relatively large deformation at the formwork joints, resulting in reduced work efficiency during the removal operation by construction workers, reduced service life of the formwork, and increased losses. At the same time, because the position of the prestressed cable embedded duct in the hybrid tower foundation is a cantilever structure and the self-weight of the concrete is large, the formwork support is difficult. At present, most of the industry uses a two-pouring process. The process is basically: installation of the bottom slab steel bar project → installation of the water stop belt → pouring of concrete in area I → installation of steel bars and formwork in area II, embedded ducts → pouring of concrete → curing. Finally, a horizontal construction joint is left at the bottom slab position. Under the geological conditions where the groundwater level is good or even there is no groundwater, this construction method has little impact on the durability of the foundation. On the contrary, when the groundwater level condition of the fan foundation is complex, factors such as the quality of the water stop belt product, the quality of installation and welding, the quality of construction joint treatment, and the quality of concrete vibration will directly affect the durability of the foundation concrete, thus posing a hidden danger to the structural safety of the wind turbine generator foundation. Summary of the Invention

[0004] Aiming at the above problems, the purpose of the present invention is to provide an internal formwork support device and method for integral pouring of a wind power hybrid tower foundation. This support device can ensure the roundness and forming quality of the concrete cavity inside the foundation, improve the embedding accuracy of the prestressed cable ducts, ensure the integrity of the foundation forming, improve the construction efficiency and acceptance passing rate, and make the on-site construction safe and convenient, and the foundation structurally safe and reliable within the designed service life.

[0005] The technical solution of the present invention lies in: an internal formwork support device for the integral pouring of the foundation of a wind power hybrid tower, including a central fixed pile, a horizontally adjustable support, and a vertically adjustable support. The central fixed pile is located at the central position of the internal formwork to be poured. The central fixed pile is provided with multiple layers of horizontal supports from top to bottom. Each layer of horizontal support is provided with multiple horizontally adjustable supports. One end of the horizontally adjustable support is fixedly connected to the central fixed pile, and the other end is in contact with the inner side wall of the internal formwork to be poured. The vertically adjustable supports are distributed along the circumferential edge of the lower part of the internal formwork to be poured. One end of the vertically adjustable support is connected to the bottom plate of the internal formwork to be poured, and the other end is in contact with the internal top plate of the internal formwork to be poured.

[0006] The horizontally adjustable support includes a horizontal support rod and a horizontally adjustable component. The horizontal support rod is hollow inside. The horizontally adjustable component includes a horizontal adjusting rod and a horizontal adjusting nut. One end of the horizontal adjusting rod is located inside the horizontal support rod, and the other end is provided with a horizontal support claw. The surface of the horizontal adjusting rod is provided with threads. The horizontal adjusting nut is rotatably connected to the horizontal adjusting rod and is in contact with the end of the horizontal support rod.

[0007] The vertically adjustable support includes a vertical support rod and a vertically adjustable component. The vertical support rod is hollow inside. The vertically adjustable component includes a vertical adjusting rod and a vertical adjusting nut. One end of the vertical adjusting rod is located inside the vertical support rod, and the other end is provided with a vertical support claw. The surface of the vertical adjusting rod is provided with threads. The vertical adjusting nut is rotatably connected to the vertical adjusting rod and is in contact with the end of the vertical support rod.

[0008] The central fixed pile is formed by welding a steel pipe and multiple round steel bars. The round steel bars are evenly distributed along the circumference of the steel pipe.

[0009] The multiple horizontally adjustable supports in each layer of horizontal support are evenly distributed along the circumference of the central fixed pile, and the multiple horizontally adjustable supports in the upper and lower layers of horizontal support are staggered.

[0010] An internal formwork support method for the integral pouring of the foundation of a wind power hybrid tower, using the above-mentioned internal formwork support device for the integral pouring of the foundation of a wind power hybrid tower, includes the following steps: S1: Weld a steel pipe and multiple round steel bars to make the central fixed pile, and fix the central fixed pile at the central position of the internal formwork to be poured; S2: Insert the horizontally adjustable supports into the central fixed pile layer by layer according to the design requirements, and adjust them to be in contact with the inner side wall of the internal formwork to be poured; S3: Arrange the vertically adjustable supports along the circumferential edge of the lower part of the internal formwork to be poured, and adjust them so that their tops are in contact with the internal top plate of the internal formwork to be poured, completing the internal formwork support.

[0011] The technical effects of the present invention are as follows: 1. The present invention evenly transmits the horizontal axial force of the horizontally adjustable support through the central fixed pile, so that the inner formwork is evenly stressed, and the formwork and the support system as a whole do not shift, thereby ensuring the roundness of the inner cavity of the foundation, improving the embedding accuracy of the prestressed cable duct, and making the installation quality of the prestressed cables in the concrete tower barrel of the fan controllable; 2. The present invention uses the vertically adjustable support to support the side formwork, and controls the horizontal elevation of the top surface of the formwork by adjusting the height of the vertically adjusting nut exposed from the vertical support rod, ensuring that the horizontal elevation of the top surface of the foundation is controllable. At the same time, the side formwork is suspended as a whole, so that the concrete can flow to the bottom plate, so that the concrete tower foundation is formed integrally in one pouring, improving the construction efficiency and the acceptance passing rate, making the on-site construction safe and convenient, and the structure of the foundation safe and reliable within the designed service life; 3. The present invention has a simple structure, is convenient for construction and disassembly, and by selecting horizontal support rods and vertical support rods of different lengths, it can be applied to the construction of concrete tower foundations of various sizes, thereby reducing the material purchase cost and loss and improving the construction efficiency.

[0012] The following will be further described with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural sectional view of an inner formwork support device for integral pouring of a wind power concrete tower foundation according to an embodiment of the present invention.

[0014] Figure 2 It is a structural plan view of an inner formwork support device for integral pouring of a wind power concrete tower foundation according to an embodiment of the present invention.

[0015] Figure 3 It is an assembly schematic diagram of a central fixed pile, a support rod and a horizontally adjustable support structure according to an embodiment of the present invention.

[0016] Figure 4 It is a schematic diagram of a horizontally adjustable support structure according to an embodiment of the present invention.

[0017] Figure 5 It is a structural schematic diagram of a horizontally adjustable component according to an embodiment of the present invention.

[0018] Figure 6 It is a schematic diagram of a vertically adjustable support according to an embodiment of the present invention.

[0019] Reference numerals: 1 - central fixed pile; 2 - horizontally adjustable support; 3 - vertically adjustable support; 201 - horizontal support rod, 202 - horizontal adjusting rod, 203 - horizontal adjusting nut, 204 - horizontal support claw, 301 - vertical support rod, 302 - vertical adjusting rod, 303 - vertical adjusting nut, 304 - vertical support claw. DETAILED DESCRIPTION OF THE EMBODIMENTS Embodiment 1

[0020] AsFigures 1 to 6 As shown in the figure, an internal formwork support device for the integral pouring of a wind power hybrid tower foundation includes a central fixed pile 1, a horizontally adjustable support 2, and a vertically adjustable support 3. The central fixed pile 1 is located at the center position of the internal formwork to be poured. The central fixed pile 1 is provided with multiple layers of horizontal supports from top to bottom. Each layer of horizontal support is provided with a plurality of horizontally adjustable supports 2. One end of the horizontally adjustable support 2 is fixedly connected to the central fixed pile 1, and the other end is in contact with the inner side wall of the internal formwork to be poured. The vertically adjustable supports 3 are distributed along the circumferential edge of the lower part of the internal formwork to be poured. One end of the vertically adjustable support 3 is connected to the bottom plate of the internal formwork to be poured, and the other end is in contact with the internal top plate of the internal formwork to be poured.

[0021] During the actual use process, the present invention evenly transmits the horizontal axial force of the horizontally adjustable support through the central fixed pile, so that the inner formwork is evenly stressed, and the formwork and the support system as a whole do not shift, thereby ensuring the roundness of the internal cavity of the foundation, improving the embedding accuracy of the prestressed cable ducts, and making the installation quality of the prestressed cables of the fan concrete tower barrel controllable; the present invention uses the vertically adjustable support to support the side formwork, and at the same time controls the horizontal elevation of the top surface of the formwork, ensuring that the horizontal elevation of the top surface of the foundation is controllable. At the same time, the side formwork is suspended as a whole, so that the concrete can flow to the bottom plate, so that the hybrid tower foundation is formed integrally by one-time pouring, improving the construction efficiency and the acceptance passing rate, making the on-site construction safe and convenient, and the structure of the foundation safe and reliable within the designed service life. Embodiment 2

[0022] Preferably, on the basis of Embodiment 1, in this embodiment, the horizontally adjustable support 2 includes a horizontal support rod 201 and a horizontally adjustable component. The horizontal support rod 201 is hollow inside. The horizontally adjustable component includes a horizontal adjusting rod 202 and a horizontal adjusting nut 203. One end of the horizontal adjusting rod 202 is located inside the horizontal support rod 201, and the other end is provided with a horizontal support claw 204. The surface of the horizontal adjusting rod 202 is provided with threads. The horizontal adjusting nut 203 is rotatably connected to the horizontal adjusting rod 202 and is in contact with the end of the horizontal support rod 201.

[0023] During the actual use process, the present invention rotates the horizontal adjusting nut 203 on the horizontal adjusting rod 202 to increase or decrease the length of the horizontal adjusting rod 202 inside the horizontal support rod 201 to ensure that the horizontal support claw 204 is in contact with the inner side wall of the internal formwork to be poured. Embodiment 3

[0024] Preferably, based on Embodiment 1 or Embodiment 2, in this embodiment, the vertically adjustable support 3 includes a vertically supporting rod 301 and a vertically adjustable component. The inside of the vertically supporting rod 301 is hollow. The vertically adjustable component includes a vertically adjusting rod 302 and a vertically adjusting nut 303. One end of the vertically adjusting rod 302 is located inside the vertically supporting rod 301, and the other end is provided with a vertically supporting claw 304. The surface of the vertically adjusting rod 302 is provided with threads. The vertically adjusting nut 303 is rotatably connected to the vertically adjusting rod 302 and contacts the end of the vertically supporting rod 301.

[0025] During actual use, in the present invention, by rotating the vertically adjusting nut 303 on the vertically adjusting rod 302, the length of the vertically adjusting rod 302 inside the vertically supporting rod 301 is increased or decreased to ensure that the vertically supporting claw 304 contacts the inner top plate of the inner formwork to be poured. Embodiment 4

[0026] Preferably, based on Embodiment 1 or Embodiment 3, in this embodiment, the central fixing pile 1 is formed by welding a steel pipe and a plurality of round steel bars, and the round steel bars are evenly distributed along the circumferential direction of the steel pipe.

[0027] During actual use, in the present invention, the central fixing pile 1 is formed by welding a steel pipe and a plurality of round steel bars, and the round steel bars are evenly distributed along the circumferential direction of the steel pipe, ensuring that the central fixing pile 1 has sufficient structural strength. Embodiment 5

[0028] Preferably, based on Embodiment 1, in this embodiment, a plurality of horizontally adjustable supports 2 in each layer of the horizontal support are evenly distributed along the circumferential direction of the central fixing pile 1, and the plurality of horizontally adjustable supports 2 in the upper and lower layers of the horizontal support are staggeredly distributed.

[0029] During actual use, in the present invention, a plurality of horizontally adjustable supports 2 in each layer of the horizontal support are evenly distributed along the circumferential direction of the central fixing pile 1, and the plurality of horizontally adjustable supports 2 in the upper and lower layers of the horizontal support are staggeredly distributed, ensuring that the horizontally adjustable supports 2 are in uniform contact with the inner side wall of the inner formwork to be poured. Stable support is achieved. Embodiment 6

[0030] An inner formwork support method for integral pouring of a wind power hybrid tower foundation, using the above-mentioned inner formwork support device for integral pouring of a wind power hybrid tower foundation, includes the following steps: S1: Weld a steel pipe and a plurality of round steel bars to make the central fixing pile 1, and fix the central fixing pile 1 at the central position of the inner formwork to be poured; S2: Insert the horizontally adjustable supports 2 into the central fixing pile 1 layer by layer according to the design requirements, and adjust them to contact the inner side wall of the inner formwork to be poured; S3: Arrange the vertically adjustable support 3 along the circumferential edge at the lower part of the inner formwork to be poured, and adjust it so that its top contacts the inner roof of the inner formwork to be poured, thus completing the support of the inner formwork.

[0031] As described above, only the preferred specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An internal formwork support device for the integral pouring of the foundation of a wind power hybrid tower, characterized in that: It includes a central fixed pile (1), a horizontally adjustable support (2) and a vertically adjustable support (3). The central fixed pile (1) is located at the center position of the internal formwork to be poured. The central fixed pile (1) is provided with multiple layers of horizontal supports from top to bottom. Each layer of horizontal support is provided with multiple horizontally adjustable supports (2). One end of the horizontally adjustable support (2) is fixedly connected to the central fixed pile (1), and the other end is in contact with the inner side wall of the internal formwork to be poured. The vertically adjustable supports (3) are distributed along the circumferential edge of the lower part of the internal formwork to be poured. One end of the vertically adjustable support (3) is connected to the bottom plate of the internal formwork to be poured, and the other end is in contact with the internal top plate of the internal formwork to be poured.

2. The internal formwork support device for the integral pouring of the foundation of a wind power hybrid tower according to claim 1, characterized in that: The horizontally adjustable support (2) includes a horizontal support rod (201) and a horizontally adjustable component. The horizontal support rod (201) is hollow inside. The horizontally adjustable component includes a horizontal adjusting rod (202) and a horizontal adjusting nut (203). One end of the horizontal adjusting rod (202) is located inside the horizontal support rod (201), and the other end is provided with a horizontal support claw (204). The surface of the horizontal adjusting rod (202) is provided with threads. The horizontal adjusting nut (203) is rotatably connected to the horizontal adjusting rod (202) and is in contact with the end of the horizontal support rod (201).

3. The internal formwork support device for the integral pouring of the foundation of a wind power hybrid tower according to claim 1, characterized in that: The vertically adjustable support (3) includes a vertical support rod (301) and a vertically adjustable component. The vertical support rod (301) is hollow inside. The vertically adjustable component includes a vertical adjusting rod (302) and a vertical adjusting nut (303). One end of the vertical adjusting rod (302) is located inside the vertical support rod (301), and the other end is provided with a vertical support claw (304). The surface of the vertical adjusting rod (302) is provided with threads. The vertical adjusting nut (303) is rotatably connected to the vertical adjusting rod (302) and is in contact with the end of the vertical support rod (301).

4. The internal formwork support device for the integral pouring of the foundation of a wind power hybrid tower according to claim 1, characterized in that: The central fixed pile (1) is formed by welding a steel pipe and multiple round steel bars. The round steel bars are evenly distributed along the circumference of the steel pipe.

5. The internal formwork support device for the integral pouring of the foundation of a wind power hybrid tower according to claim 1, characterized in that: The multiple horizontally adjustable supports (2) in each layer of horizontal support are evenly distributed along the circumference of the central fixed pile (1), and the multiple horizontally adjustable supports (2) in the upper and lower layers of horizontal support are staggered.

6. An internal formwork support method for the integral pouring of the foundation of a wind power hybrid tower, using the internal formwork support device for the integral pouring of the foundation of a wind power hybrid tower according to claim 1, characterized in that: It includes the following steps: S1: Weld a steel pipe and multiple round steel bars to fabricate a central fixing pile (1), and fix the central fixing pile (1) at the central position of the inner formwork to be poured; S2: Insert the horizontally adjustable supports (2) into the central fixing pile (1) layer by layer according to the design requirements, and adjust them to contact the inner side wall of the inner formwork to be poured; S3: Arrange the vertically adjustable supports (3) along the circumferential edge at the lower part of the inner formwork to be poured, and adjust them so that their tops contact the inner top plate of the inner formwork to be poured, completing the support of the inner formwork.

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