Land assembly type wind power tower drum foundation

Abstract

The utility model discloses a land assembly type wind power tower drum foundation which comprises a reinforced concrete bottom plate and a common concrete shell. A plurality of first pre-embedded pre-stressed anchor rods are pre-embedded in the top of the reinforced concrete bottom plate in the circumferential direction, and a plurality of second pre-embedded pre-stressed anchor rods arranged in the circumferential direction are pre-embedded in the inner sides of the first pre-embedded pre-stressed anchor rods. The foundation is unique in design, reduces the use amount of the profile steel, reduces the binding work of the steel bars, has the advantages of short construction period, less on-site input labor, high construction speed and the like, and meanwhile, the profile steel part of the inner layer of the foundation can be prefabricated in a factory in a segmented manner, so that the foundation has the advantage of convenience in transportation and assembly construction processes. The use amount of reinforced concrete materials is effectively reduced, factory prefabrication of most components is achieved, a standardized assembly process is adopted for assembly on site, and the construction efficiency is improved. And integral concrete pouring is combined, so that the integral stress performance of the foundation structure is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to an onshore assembled wind power tower foundation. Background Art

[0002] As a pollution-free, renewable and clean energy, wind power energy has been widely used in recent years. At present, wind power foundations mainly adopt extended foundations, pile foundations and rock anchor foundations. Extended foundations are usually reinforced concrete structures, which usually weigh hundreds of tons and use the foundation gravity to resist the overturning moment of the wind turbine. Its advantages are strong applicability, rich engineering experience and high safety. However, its disadvantages are relatively large amounts of concrete and steel bars. Pile foundations use piles at the bottom of the cap to bear the gravity load of the wind turbine structure, upper soil layer and cap. Its advantages are that it can adapt to areas with thick soft soil layers and has rich engineering experience. However, its disadvantages include large amounts of concrete and steel bars, high cost and high construction difficulty. Rock anchor foundations rely on the combined action of rock anchors, concrete caps and rock foundations. Its advantages are that it can save concrete and steel bars and reduce excavation and filling. However, its disadvantages include high construction requirements, high difficulty and low safety, and it is not widely used at present.

[0003] Therefore, in order to improve the construction technology level of wind turbine tower foundation, a wind turbine tower foundation construction technology scheme with more convenient construction and more reasonable structure is proposed to meet the development needs of the wind power industry and improve project benefits, which has important practical significance. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes an onshore assembled wind power tower foundation.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A land-based assembled wind power tower foundation comprises a reinforced concrete base plate and an ordinary concrete shell; a plurality of first embedded prestressed anchor rods are pre-embedded along the circumferential direction on the top of the reinforced concrete base plate, and a plurality of second embedded prestressed anchor rods arranged along the circumferential direction are embedded inside the first embedded prestressed anchor rods; the ordinary concrete shell is cylindrical; the outer side and the inner side of the top of the ordinary concrete shell are convex to form a top outer convex ring and a top inner convex ring respectively; the outer side and the inner side of the bottom of the ordinary concrete shell are convex to form a bottom outer convex ring and a bottom inner convex ring respectively; the first embedded prestressed anchor rod passes through the bottom outer convex ring and the top outer convex ring and is connected with a first fixing nut; the second embedded prestressed anchor rod passes through the bottom inner convex ring and is connected with a second fixing nut; an inner reserved hole for connecting with the wind power tower is formed on the top inner convex ring.

[0007] As a further improvement, a steel foundation is provided inside the ordinary concrete shell.

[0008] As a further improvement, the steel foundation is formed by splicing a plurality of arc-shaped steel foundation sections together.

[0009] A further improvement is that the steel foundation section includes an upper steel plate and a lower steel plate; the four corners of the upper steel plate and the lower steel plate are connected by steel columns respectively; the two sides of the upper steel plate extend into the top outer convex ring and the top inner convex ring respectively, and the two sides of the lower steel plate extend into the bottom outer convex ring and the bottom inner convex ring respectively.

[0010] As a further improvement, a weight-reducing hole is formed in the middle of the upper steel plate and the lower steel plate; the upper steel plate and the lower steel plate also have outer reserved holes and inner reserved holes that cooperate with the first embedded prestressed anchor rod and the second embedded prestressed anchor rod respectively.

[0011] As a further improvement, steel plates are arranged on the inner and outer sides of the steel columns of adjacent steel foundation sections, and two rows of high-strength bolts pass through the steel plates and steel columns respectively to connect the adjacent steel foundation sections together.

[0012] The beneficial effects of the utility model are:

[0013] 1. By adopting the prefabricated structure, the basic structure is assembled, which makes the construction convenient, fast and efficient, and successfully solves the difficulties in material transportation and on-site construction, as well as the uncontrollable quality of concrete pouring.

[0014] 2. As a steel-concrete structure, it has more obvious advantages than traditional reinforced concrete structures and can effectively resist larger loads from above.

[0015] 3. The utility model sets prestressed anchor bolts at the reserved holes on the outside of the foundation, making full use of the interaction between the concrete bottom plate and the foundation and the weight of the concrete inside and outside the steel foundation, thereby improving the overall anti-overturning ability of the structure.

[0016] 4. The utility model has a unique design, which reduces the amount of steel and reduces the work of steel bar binding. It has the advantages of short construction period, less on-site labor, and fast construction speed. At the same time, the steel part of the inner layer of the foundation can be prefabricated in sections in the factory, which has the advantages of convenient transportation and assembly construction process. By effectively reducing the amount of reinforced concrete materials and realizing factory prefabrication of most components, standardized assembly processes are used on-site to improve construction efficiency. Combined with overall concrete pouring, the overall stress performance of the foundation structure is further improved.

[0017] 5. The utility model gives full play to the advantages of the combined structure, has reasonable force, reduces the difficulty of on-site construction, reduces the amount of materials used, improves construction efficiency, and has good engineering application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0019] Figure 1 It is a structural schematic diagram of the assembled wind power tower foundation;

[0020] Figure 2 This is a schematic diagram of the lower foundation of the wind turbine tower;

[0021] Figure 3 This is a schematic diagram of the reinforced concrete base plate;

[0022] Figure 4 This is a schematic diagram of steel splicing;

[0023] Figure 5 This is a schematic diagram of the steel foundation section connection. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and examples.

[0025] Example 1

[0026] like Figure 1-Figure 5 An onshore assembled wind turbine tower foundation shown includes a reinforced concrete base plate 1, a second embedded prestressed anchor rod 2, a first embedded prestressed anchor rod 3, a steel foundation 4, an ordinary concrete shell 5, a top outer convex ring 51, a top inner convex ring 52, a bottom outer convex ring 53, a bottom inner convex ring 54, a cavity 6, an inner reserved hole 7, an outer reserved hole 8, a steel foundation section 10, an upper steel plate 101, a lower steel plate 102, a steel column 103, a weight reduction hole 104, a steel plate 11, high-strength bolts 12, a first fixing nut 16, a steel concrete foundation 15, and a wind turbine tower 20.

[0027] The manufacturing method is as follows: first, cast a reinforced concrete foundation slab 1 on site, in which the second embedded prestressed anchor rod 2 and the first embedded prestressed anchor rod 3 are provided, and an integral structure is formed during the casting process of the slab. Then, the steel foundation section 10 prefabricated in the factory is assembled on site, and during the assembly, the inner reserved holes 7 and the outer reserved holes 8 on the foundation section correspond one by one to the second embedded prestressed anchor rod 2 and the first embedded prestressed anchor rod 3 on the reinforced concrete slab 1, respectively, and the foundation sections are connected with steel plates 11 and high-strength bolts 12. After the steel foundation 4 is assembled, concrete is poured so that the concrete is evenly filled into the cavity of the steel foundation 4, and finally the steel foundation 4 is embedded in the concrete to form a layer of concrete shell 5. In the process of pouring the concrete shell 5, pay attention to retaining the inner reserved holes 7 and the outer reserved holes 8 on the steel foundation section 10. Then, prestress is applied to the first embedded prestressed anchor rod 3 in the hole 8 outside the foundation, and the steel concrete foundation 15 and the reinforced concrete bottom plate 1 are tightly connected by the prestressed anchor bolts, so that the steel concrete foundation 15 and the reinforced concrete bottom plate 1 become a whole. Then, the inner reserved hole 7 at the lower inner side of the foundation is connected to the second embedded prestressed anchor rod 2 on the reinforced concrete bottom plate 1 by bolts, and the inner reserved hole 7 at the top inner side of the foundation is connected to the upper wind power tower 20 by bolts or prestressed anchor rods.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. An onshore assembled wind power tower foundation, characterized in that: The invention comprises a reinforced concrete base plate (1) and an ordinary concrete shell (5); a plurality of first pre-buried prestressed anchor rods (3) are pre-buried along the circumferential direction at the top of the reinforced concrete base plate (1); a plurality of second pre-buried prestressed anchor rods (2) arranged along the circumferential direction are buried inside the first pre-buried prestressed anchor rods (3); the ordinary concrete shell (5) is cylindrical; the outer side and the inner side of the top of the ordinary concrete shell (5) are convex to form a top outer convex ring (51) and a top inner convex ring (52); the ordinary The outer side and inner side of the bottom of the concrete shell (5) are convex to form a bottom outer convex ring (53) and a bottom inner convex ring (54) respectively; the first embedded prestressed anchor rod (3) passes through the bottom outer convex ring (53) and the top outer convex ring (51) and is connected to a first fixing nut (16); the second embedded prestressed anchor rod (2) passes through the bottom inner convex ring (54) and is connected to a second fixing nut; and an inner reserved hole (7) for connecting to a wind power tower (20) is formed on the top inner convex ring (52).

2. The onshore assembled wind turbine tower foundation according to claim 1, characterized in that: A steel foundation (4) is arranged inside the ordinary concrete shell (5).

3. The onshore assembled wind turbine tower foundation according to claim 2, characterized in that: The steel foundation (4) is formed by splicing a plurality of arc-shaped steel foundation sections (10) together.

4. The onshore assembled wind turbine tower foundation according to claim 3, characterized in that: The profiled steel foundation section (10) comprises an upper profiled steel plate (101) and a lower profiled steel plate (102); the four corners of the upper profiled steel plate (101) and the lower profiled steel plate (102) are connected by steel columns (103); the two sides of the upper profiled steel plate (101) extend into the top outer convex ring (51) and the top inner convex ring (52), respectively, and the two sides of the lower profiled steel plate (102) extend into the bottom outer convex ring (53) and the bottom inner convex ring (54), respectively.

5. The onshore assembled wind power tower foundation according to claim 4, characterized in that: A weight-reducing hole (104) is formed in the middle of the upper steel plate (101) and the lower steel plate (102); the upper steel plate (101) and the lower steel plate (102) are also provided with an outer reserved hole (8) and an inner reserved hole (7) respectively matched with the first embedded prestressed anchor rod (3) and the second embedded prestressed anchor rod (2).

6. The onshore assembled wind power tower foundation according to claim 4, characterized in that: Steel plates (11) are arranged on both sides of the steel columns (103) of adjacent steel foundation sections (10), and two rows of high-strength bolts (12) pass through the steel plates (11) and the steel columns (103) respectively to connect the adjacent steel foundation sections (10) together.

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