Beam-slab-like wind tower foundation device

Abstract

The utility model provides a beam-slab-like wind tower foundation device which comprises an original bottom foundation, a newly-arranged top platform, newly-arranged foundation rib beams and a newly-arranged bottom annular belt-shaped foundation, the newly-arranged top platform is poured at the top of the original bottom foundation, and the newly-arranged bottom annular belt-shaped foundation is annularly arranged on the periphery of the original bottom foundation. A plurality of newly-arranged foundation rib beams are arranged on the outer side of the original bottom foundation, the tops of the newly-arranged foundation rib beams are connected with the side wall of the newly-arranged top table, and the bottoms of the newly-arranged foundation rib beams are connected with the newly-arranged bottom annular belt-shaped foundation. The top platform is arranged on the original bottom foundation, the newly-arranged bottom annular belt-shaped foundation is arranged on the outer side of the original bottom foundation, and the newly-arranged top platform, the original bottom foundation and the newly-arranged bottom annular belt-shaped foundation are connected through the newly-arranged foundation rib beams to form a beam-slab-like foundation, so that the performance of the original bottom foundation can be fully utilized; and the concrete volume of the foundation can be greatly reduced, and the service life of the existing foundation and facilities is prolonged and resource utilization is realized to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of wind tower foundations, in particular to a beam-plate type wind tower foundation device. Background Art

[0002] Currently, wind turbine renovation projects at wind farms typically involve dismantling existing foundations and constructing new ones. Existing technologies require extensive dismantling of existing foundations, raising concerns about solid waste disposal. This process also results in significant abandonment of existing foundations, roads, and other infrastructure, making it less economical and unfavorable for project costs and timelines. Therefore, it is necessary to design a wind tower foundation that fully utilizes the existing foundation. Utility Model Content

[0003] The purpose of the utility model is to provide a beam-slab type wind tower foundation device, which adopts a beam-slab foundation, can fully utilize the performance of the original foundation, can greatly reduce the concrete volume of the foundation, and maximize the life extension and resource utilization of the existing foundation and facilities.

[0004] According to one purpose of the utility model, the utility model provides a beam-plate type wind tower foundation device, including an original bottom foundation, a newly installed top platform, a newly installed foundation rib beam and a newly installed bottom annular strip foundation, the newly installed top platform is cast on the top of the original bottom foundation, the newly installed bottom annular strip foundation is arranged in an annular manner around the original bottom foundation, a number of the newly installed foundation rib beams are provided on the outer side of the top of the original bottom foundation, the top of the newly installed foundation rib beam is connected to the side wall of the newly installed top platform, and the bottom of the newly installed foundation rib beam is connected to the new bottom annular strip foundation.

[0005] Furthermore, the original bottom foundation is a plate-type stress-bearing foundation, and the bottom of the original bottom foundation is connected to the ground through a pile foundation or a natural foundation.

[0006] Furthermore, new steel bars are provided between the newly-installed top platform and the original bottom foundation, the new steel bars are connected to the steel bars in the original bottom foundation, and the tops of the new steel bars are cast inside the newly-installed top platform.

[0007] Furthermore, a number of newly-installed top platform hidden beams are arranged in a circular pattern around the periphery of the newly-installed top platform.

[0008] Furthermore, steel bars are provided inside the newly-installed top platform hidden beam, and the steel bars inside the newly-installed top platform hidden beam are fixedly connected to the anchor cage steel bars inside the original bottom foundation.

[0009] Furthermore, prestressed anchor bolts are provided inside the newly-installed top platform hidden beam, and the bottoms of the prestressed anchor bolts are anchored into the original bottom foundation.

[0010] Furthermore, the height of the top platform hidden beam is more than one meter higher than the outdoor floor, and the bottom of the annular strip foundation is flush with the bottom foundation.

[0011] Furthermore, a tower is provided on the top of the top platform, and the tower is connected to the prestressed anchor bolt.

[0012] Furthermore, a plurality of the newly-installed foundation ribs are evenly arranged along the circumferential direction of the original bottom foundation.

[0013] Furthermore, radial reinforcement is provided at the inner top of the newly-established foundation rib beam, and both ends of the radial reinforcement are anchored into the inner part of the newly-established top platform hidden beam and the newly-established bottom annular strip foundation. The newly-established foundation rib beam is connected to the original bottom foundation through embedded reinforcement.

[0014] The technical solution of the present invention is to set a new top platform on the original bottom foundation, set a new bottom annular strip foundation on the outside of the original bottom foundation, connect the new top platform and the new bottom annular strip foundation through a new foundation rib beam, and adopt a beam-slab foundation, which can make full use of the original foundation performance, greatly reduce the concrete volume of the foundation, and extend the life and resource utilization of the existing foundation and facilities to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a top view of the natural foundation of an embodiment of the present utility model;

[0017] Figure 2 This is a top view of the pile foundation of the embodiment of the utility model;

[0018] Figure 3 This is a cross-sectional view of the structure under the natural foundation of an embodiment of the utility model;

[0019] Figure 4 This is a cross-sectional view of the structure under the pile foundation of an embodiment of the utility model;

[0020] In the figure: 1. Original bottom foundation; 2. New bottom annular strip foundation; 3. New pile foundation; 4. New foundation rib beam; 5. New top platform; 6. New top platform hidden beam; 7. Prestressed anchor bolt; 8. Tower; 9: Original pile foundation. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0024] Example 1

[0025] like Figure 1-Figure 4 As shown,

[0026] A beam-slab type wind tower foundation device includes an original bottom foundation 1, a newly installed top platform 5, a newly installed foundation rib 4 and a newly installed bottom annular strip foundation 2. The original bottom foundation 1 is a foundation fixed to the ground. The bottom of the original bottom foundation 1 is connected to the ground through an original pile foundation 9, and the bottom annular strip foundation 2 is connected to the ground through a newly installed pile foundation 3.

[0027] The newly established top platform 5 is cast on the top of the original bottom foundation 1. Before casting the newly established top platform 5, new steel bars are set in the original bottom foundation 1. The new steel bars are welded to the steel bars in the original bottom foundation 1. The new steel bars are exposed on the upper surface of the original bottom foundation 1. When casting the new top platform 5, the new steel bars are cast inside the new top platform 5.

[0028] A number of new top platform hidden beams 6 are arranged in a ring around the new top platform 5. The new top platform hidden beams 6 are provided with steel bars. The steel bars inside the new top platform hidden beams 6 are fixedly connected to the anchor cage steel bars in the original bottom foundation 1.

[0029] Prestressed anchor bolts 7 are installed inside the newly installed roof platform concealed beam 6. The bottom of the prestressed anchor bolts 7 is anchored into the existing base 1. The height of the newly installed roof platform concealed beam 6 is determined by the length of the prestressed anchor bolts 7. The newly installed roof platform concealed beam 6 is generally more than 1 meter above the outdoor floor. The tower 8 is installed on the newly installed roof platform 5 and is fixedly connected to the prestressed anchor bolts 7.

[0030] A new bottom annular strip foundation 2 is installed around the outside of the existing bottom foundation 1. This new bottom annular strip foundation 2 is connected to the existing bottom foundation 1 via steel bars to ensure overall rigidity. New pile foundations 3 are installed at the bottom of this new bottom annular strip foundation 2, which is connected to the foundation. This new bottom annular strip foundation 2 is lower than the outdoor floor, and its bottom is flush with the existing bottom foundation 1.

[0031] A number of new foundation ribs 4 are provided on the outside of the original bottom foundation 1. The new foundation ribs 4 are evenly arranged along the circumferential direction of the original bottom foundation 1. Radial steel bars are provided on the top of the new foundation ribs 4, and the radial steel bars are anchored into the new top platform hidden beams 6; the new foundation ribs 4 are lower than the outdoor floor, so that the entire foundation surface is covered with green plants; the new foundation ribs 4 are connected to the original bottom foundation 1 and the new bottom annular strip foundation 2 through steel bars.

[0032] The utility model is used in a wind turbine reconstruction project of a wind farm, and is aimed at reconstructing an existing wind turbine foundation, and is used to reuse the existing original bottom foundation 1.

[0033] The method for preparing the beam-plate type wind tower foundation device comprises the following steps:

[0034] 1. Roughen the outer surface of the existing bottom foundation 1 and install new steel bars on the original bottom foundation 1. Weld the new steel bars to the original steel bars in the bottom foundation 1. The new steel bars are used to extend into the new foundation so that the new and old foundations bear the force together to ensure the overall rigidity of the new and old foundations.

[0035] 2. A new top platform 5 is cast on the top of the original frustum-shaped bottom foundation 1, and new steel bars are poured inside the new top platform 5. A new top platform hidden beam 6 is set around the periphery of the new top platform 5. The steel bars of the new top platform hidden beam 6 are reliably connected to the anchor cage steel bars in the original bottom foundation 1; prestressed anchor bolts 7 of the new unit are set in the new top platform hidden beam 6, and the prestressed anchor bolts 7 are anchored in the original bottom foundation 1; the height of the new top platform hidden beam 6 is determined according to the length of the prestressed anchor bolts 7 of the new unit, and the new top platform hidden beam 6 is generally more than 1 meter higher than the outdoor floor;

[0036] 3. Set up a new bottom ring strip foundation 2 in the outer ring direction of the original bottom foundation 1. The new bottom ring strip foundation 2 is connected to the original bottom foundation 1 through steel bars to ensure the overall rigidity. The new bottom ring strip foundation 2 is lower than the outdoor floor, and the bottom of the new bottom ring strip foundation 2 is flush with the original bottom foundation 1.

[0037] 4. A new foundation rib beam 4 is set on the surface of the original frustum-shaped bottom foundation 1. Radial steel bars are set on the top of the new foundation rib beam 4 to bear the force, and the radial steel bars are anchored in the newly set top platform hidden beam 6; the newly set foundation rib beam 4 is lower than the outdoor floor, so that the surface can be covered with green plants after the overall foundation in-situ renovation is completed; the newly set foundation rib beam 4 is connected to the original bottom foundation 1 and the new bottom annular strip foundation 2 through steel bars.

[0038] The utility model takes into account that the foundation of the wind tower is subjected to the dynamic effect of wind load for a long time, and the foundation is mainly controlled by the bending moment of the wind load. The bending moment of the new wind turbine is generally more than twice the bending moment of the original foundation. The conventional method of expanding the cross-section is adopted, and its foundation will be larger than the existing foundation. The beam-slab foundation is adopted, which can make full use of the performance of the original foundation and greatly reduce the concrete volume of the foundation. It can meet the requirement that the foundation of a single machine does not protrude from the red line and effectively reduce the project cost and construction period.

[0039] For example, if a 1.5MW wind turbine is upgraded to a 6.25MW unit, the original foundation is a 12m diameter truncated cone gravity foundation. The original foundation reinforced concrete volume is about 300m 3 If the traditional technology of dismantling the new reduced or expanded section is adopted, the wind load bending moment of the 1.5MW unit will be more than three times the original bending moment of 46,000 kNm after it is upgraded to a 6.25MW unit. The new foundation diameter will be about 20 meters, and a gravity foundation will be used. The amount of concrete required is about 700m 3 , and the new foundation originally exceeded the original foundation red line, conventional technology will not be able to solve the problem of limited land acquisition. The new foundation reinforced concrete volume of the utility model is about 1400m 3 , saving 300m3 of reinforced concrete compared with conventional technology 3 , saving about 42.9% of the engineering workload, with obvious results.

[0040] This utility model aims at pile foundations and natural foundations, innovates the reinforcement structure and studies the relevant key nodes and material properties, forming a universal in-situ transformation technology for wind tower foundations, which can extend the life and resource utilization of existing foundations and facilities to the greatest extent, and provide technical guarantee for the acquisition and implementation of future wind power upgrade and transformation projects.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A beam-plate type wind tower foundation device, characterized in that: It includes an original bottom foundation, a newly installed top platform, a newly installed foundation rib beam and a newly installed bottom annular strip foundation. The newly installed top platform is cast on the top of the original bottom foundation. The newly installed bottom annular strip foundation is arranged in an annular manner around the original bottom foundation. Several newly installed foundation rib beams are arranged on the outer side of the top of the original bottom foundation. The top of the newly installed foundation rib beam is connected to the side wall of the newly installed top platform, and the bottom of the newly installed foundation rib beam is connected to the new bottom annular strip foundation.

2. The beam-plate type wind tower foundation device according to claim 1, characterized in that: The original bottom foundation is a plate-type stress-bearing foundation, and the bottom of the original bottom foundation is connected to the ground through a pile foundation or a natural foundation.

3. The beam-plate type wind tower foundation device according to claim 1, characterized in that: New reinforcements are provided between the newly-installed top platform and the original bottom foundation. The new reinforcements are connected to the reinforcements in the original bottom foundation, and the tops of the new reinforcements are cast inside the newly-installed top platform.

4. The beam-plate type wind tower foundation device according to claim 1, characterized in that: A plurality of newly-established top platform hidden beams are arranged in a circular shape around the periphery of the newly-established top platform.

5. The beam-plate type wind tower foundation device according to claim 4, characterized in that: The newly-installed top platform hidden beam is internally provided with steel bars, and the steel bars internally provided with the newly-installed top platform hidden beam are fixedly connected to the anchor cage steel bars internally provided with the original bottom foundation.

6. The beam-plate type wind tower foundation device according to claim 5, characterized in that: The interior of the newly-installed top platform hidden beam is provided with a prestressed anchor bolt, and the bottom of the prestressed anchor bolt is anchored into the interior of the original bottom foundation.

7. The beam-plate type wind tower foundation device according to claim 4, characterized in that: The height of the top platform hidden beam is more than one meter higher than the outdoor floor, and the bottom of the annular strip foundation is flush with the bottom foundation.

8. The beam-plate type wind tower foundation device according to claim 6, characterized in that: A tower is provided on the top of the top platform, and the tower is connected to the prestressed anchor bolt.

9. The beam-plate type wind tower foundation device according to claim 1, characterized in that: The newly-established foundation ribs are evenly arranged along the circumferential direction of the original bottom foundation.

10. The beam-plate type wind tower foundation device according to claim 4, characterized in that: Radial steel bars are arranged on the inner top of the newly-set foundation rib beam, and both ends of the radial steel bars are anchored into the inner part of the newly-set top platform hidden beam and the newly-set bottom annular strip foundation. The newly-set foundation rib beam is connected to the original bottom foundation through embedded steel bars.

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