Prefabricated fan foundation

Abstract

According to the prefabricated fan foundation, at least one bottom plate prestressed steel bar is arranged in a fan foundation bottom plate, a fan foundation stand is arranged above the fan foundation bottom plate, at least one stand column prestressed steel bar is arranged in the fan foundation stand, anchor bolts or anchor cables are arranged on the upper portion of the assembled fan foundation stand, and the fan foundation stand and the stand column prestressed steel bar are arranged in the fan foundation stand. The anchor bolt or the anchor cable is used for connecting a fan tower; the fan foundation slab comprises a plurality of fan foundation slab precast blocks; the draught fan foundation stand comprises a plurality of draught fan foundation stand prefabricated blocks. According to the utility model, the workload of breaking and removing the original fan foundation is avoided, the original fan foundation is utilized to the maximum extent, the energy-saving and environment-friendly effects are realized, the workload of wet operation of concrete is reduced, the difficulty of concrete transportation at a remote fan position is reduced, the construction period is shortened, and the construction cost is saved.

Description

Technical Field

[0001] The utility model belongs to the field of wind power generation design and construction, and specifically relates to a prefabricated assembled wind turbine foundation structure type and a construction method. Background Art

[0002] Wind energy is a renewable clean energy with large reserves, wide distribution, and is inexhaustible. It is one of the ideal energy sources to meet the needs of sustainable development. The capacity of wind turbines is constantly increasing, and the area of ​​wind turbine foundations is constantly increasing. The disadvantages of traditional cast-in-place wind turbine foundations are becoming more and more obvious, such as long construction period, inconvenient concrete transportation, poor quality of continuous concrete pouring, easy cracking of foundations, etc. The on-site pouring of wind turbine foundations is also inconsistent with the country's idea of ​​vigorously developing prefabricated structures. How to solve the above problems, how to use higher strength concrete and steel bars on wind turbine foundations, improve quality, increase efficiency and save resources, is a new topic of great significance. Utility Model Content

[0003] The technical problem to be solved by the utility model is: how to reinforce the existing wind turbine foundation when the wind turbine is expanded and modified, and to provide a prefabricated assembled wind turbine foundation and a construction method.

[0004] The technical solution of the utility model is specifically as follows:

[0005] A prefabricated assembled wind turbine foundation, comprising a wind turbine foundation bottom plate, at least one bottom plate prestressed steel bar is arranged in the wind turbine foundation bottom plate, a wind turbine foundation column is arranged above the wind turbine foundation bottom plate, at least one column prestressed steel bar is arranged in the wind turbine foundation column, and an anchor bolt or an anchor cable is arranged on the upper part of the assembled wind turbine foundation column, and the anchor bolt or the anchor cable is used to connect the wind turbine tower;

[0006] The fan foundation bottom plate includes a plurality of fan foundation bottom plate prefabricated blocks, and each of the fan foundation bottom plate prefabricated blocks is provided with a reserved hole, and the bottom plate prestressed steel bars pass through the reserved holes in the fan foundation bottom plate prefabricated blocks;

[0007] The fan foundation column includes several fan foundation column prefabricated blocks, and adjacent fan foundation column prefabricated blocks are assembled together by prestressed bent bolts; and each fan foundation column prefabricated block is provided with a reserved long hole, and the column prestressed steel bars pass through the reserved long holes in the fan foundation column prefabricated blocks.

[0008] A bottom plate jointing surface is arranged between adjacent prefabricated blocks of the fan foundation bottom plates, and a smear layer is coated on the bottom plate jointing surface.

[0009] The prefabricated blocks of the fan foundation bottom plate are rectangular, circular, annular or arc-shaped.

[0010] A column splicing surface is arranged between adjacent prefabricated blocks of the fan foundation columns, and a coating layer is coated on the column splicing surface.

[0011] The prefabricated blocks of the fan foundation column are decomposed into 2, 3, 4, 5, 6 or 8 blocks.

[0012] The prefabricated blocks of the fan foundation bottom plate and the prefabricated blocks of the fan foundation column are made of high-strength concrete.

[0013] The beneficial effects of the utility model are as follows: the method for reinforcing the existing fan foundation during the capacity expansion and transformation of the fan provided by the utility model not only solves the problem of eliminating the workload of breaking down the original fan foundation, maximizes the use of the original fan foundation, is more energy-saving and environmentally friendly, but also reduces the workload of wet operations on concrete, reduces the difficulty of transporting concrete to remote wind turbine locations, saves construction time, and saves project costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the assembled fan foundation;

[0015] Figure 2 It is a top view of the fan foundation base plate assembly;

[0016] Figure 3 It is a cross-sectional view of the fan foundation base plate assembly;

[0017] Figure 4 This is a top view of the fan foundation column assembly;

[0018] Figure 5 It is a cross-sectional view of the fan foundation column assembly. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", 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, rather than indicating or implying 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.

[0021] like Figure 1 — Figure 5 As shown, a prefabricated assembled wind turbine foundation includes a wind turbine foundation base plate 3, in which at least one base plate prestressed steel bar 5 is arranged, and the ends of both sides of the base plate prestressed steel bar 5 are provided with tensioning anchor protection devices 8; a wind turbine foundation column 4 is arranged above the wind turbine foundation base plate 3, in which at least one base plate prestressed steel bar 10 is arranged, and an anchor bolt or anchor cable 13 is arranged on the upper part of the assembled wind turbine foundation column 4, and the anchor bolt or anchor cable 13 is used to connect the wind turbine tower 14.

[0022] Further, the wind turbine foundation bottom plate 3 includes a plurality of wind turbine foundation bottom plate prefabricated blocks 1, and a bottom plate splicing surface 7 is provided between adjacent wind turbine foundation bottom plate prefabricated blocks 1, and a coating layer is coated on the bottom plate splicing surface 7; and each wind turbine foundation bottom plate prefabricated block 1 is provided with a reserved hole 6, and the bottom plate prestressed steel bar 5 passes through the reserved hole 6 in the wind turbine foundation bottom plate prefabricated block 1. Preferably, the bottom plate prestressed steel bar 5 is crisscrossed in the wind turbine foundation bottom plate 3.

[0023] Furthermore, the wind turbine foundation base plate prefabricated block 1 decomposes the wind turbine foundation base plate 3 into several wind turbine foundation base plate prefabricated blocks 1, and the smaller size and weight facilitate transportation and hoisting. The wind turbine foundation base plate prefabricated block 1 can be rectangular, circular, annular or arc-shaped.

[0024] Furthermore, the wind turbine foundation column 4 includes a plurality of wind turbine foundation column prefabricated blocks 2, a column splicing surface 12 is arranged between adjacent wind turbine foundation column prefabricated blocks 2, the column splicing surface 12 is coated with a coating layer, and adjacent wind turbine foundation column prefabricated blocks 2 are assembled together by prestressed bent bolts 9; and each of the wind turbine foundation column prefabricated blocks 2 is provided with a reserved long hole 11, and the column prestressed steel bar 10 passes through the reserved long hole 11 in the wind turbine foundation column prefabricated block 2.

[0025] Furthermore, the smaller size and weight of the prefabricated block 2 for the wind turbine foundation column facilitates transportation and hoisting, and the prefabricated block 2 for the wind turbine foundation column can be decomposed into different quantities such as 2, 3, 4, 5, 6, 8, etc.

[0026] Furthermore, the wind turbine foundation bottom plate prefabricated block 1 and the wind turbine foundation column prefabricated block 2 use high-strength concrete, such as C60, C80, to save building materials. Reinforced steel bars are configured internally during production, which are calculated and determined based on the structural bearing capacity to meet the structural strength and stiffness requirements.

[0027] The utility model changes the construction method of the wind turbine foundation from cast-in-place to prefabricated assembly, connects the wind turbine foundation bottom plate prefabricated block 1 into an assembled wind turbine foundation bottom plate 3 through the bottom plate prestressed steel bars 5 in the wind turbine foundation bottom plate, connects the wind turbine foundation platform column prefabricated block 2 into an assembled wind turbine foundation platform column 4 through prestressed bent bolts 9, connects the assembled wind turbine foundation bottom plate 3 and the assembled wind turbine foundation platform column 4 through the bottom plate prestressed steel bars 5 and the platform column prestressed steel bars 10 into a complete wind turbine foundation, so that the assembled wind turbine foundation meets the requirements of the wind turbine for structural bearing capacity and foundation bearing capacity.

[0028] Preferably, the wind turbine foundation bottom plate prefabricated block 1 and the wind turbine foundation column prefabricated block 2 may have a cavity structure inside, so as to further reduce the deadweight of the components and facilitate transportation and hoisting.

[0029] The prestressed steel bars 5 in the bottom plate of the wind turbine foundation 3 and the prestressed steel bars 10 in the column of the wind turbine foundation 4 can be made of high-strength prestressed steel bars or cables, which are calculated and determined according to the structural bearing capacity to meet the structural strength and stiffness requirements.

[0030] Grooves are provided on the bottom plate jointing surface 7 of the fan foundation bottom plate, the column jointing surface 12 of the fan foundation column, and the connection surface between the fan foundation column and the fan foundation bottom plate, and interface agent is applied or grouting is performed to facilitate connection between components.

[0031] A construction method for a prefabricated fan foundation comprises the following steps:

[0032] Step 1: Figure 2 , Figure 3 As shown, the wind turbine foundation slab prefabricated block 1 is positioned, an interface agent or grouting agent is applied to the slab joint surface 7 of the wind turbine foundation slab prefabricated block 1, the slab prestressed steel bars 5 in the wind turbine foundation slab are passed through the reserved holes 6 in the wind turbine foundation slab prefabricated block, tensioned and anchored at both ends for protection, and assembled to form a complete wind turbine foundation slab 3.

[0033] Step 2: If Figure 4 , Figure 5 As shown, the fan foundation column prefabricated block 2 is placed in position, an interface agent or grouting is applied to the column joint surface 12 of the fan foundation column prefabricated block 2, and the fan foundation column prefabricated blocks 2 are assembled together by prestressed bent bolts 9 to form an assembled fan foundation column 4. When assembling the fan foundation column 4, the prestressed steel bars 10 connecting the fan foundation bottom plate and the column are passed through the reserved holes 11 in the fan foundation column prefabricated block, and the ends of the prestressed steel bars are tensioned, anchored and protected at the upper part, and finally a completed fan foundation is formed.

[0034] Step 3: After the fan foundation is assembled and all indicators are tested and qualified, backfill the foundation pit. Figure 1As shown, the anchor bolts or anchor cables 13 required for installing the wind turbine tower are installed on the upper part of the assembled wind turbine foundation column 4, and then the wind turbine tower 14 and the wind turbine are installed.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A prefabricated fan foundation, characterized in that: The wind turbine foundation base plate (3) comprises at least one base plate prestressed steel bar (5) arranged in the wind turbine foundation base plate (3); a wind turbine foundation column (4) is arranged above the wind turbine foundation base plate (3); at least one column prestressed steel bar (10) is arranged in the wind turbine foundation column (4); an anchor bolt or an anchor cable (13) is arranged on the upper part of the assembled wind turbine foundation column (4); the anchor bolt or the anchor cable (13) is used to connect the wind turbine tower (14); The fan foundation bottom plate (3) comprises a plurality of fan foundation bottom plate prefabricated blocks (1), and each of the fan foundation bottom plate prefabricated blocks (1) is provided with a reserved hole (6), and the bottom plate prestressed steel bars (5) pass through the reserved holes (6) in the fan foundation bottom plate prefabricated blocks (1); The fan foundation column (4) comprises a plurality of fan foundation column prefabricated blocks (2), and adjacent fan foundation column prefabricated blocks (2) are assembled together via prestressed bent bolts (9); and each fan foundation column prefabricated block (2) is provided with a reserved long hole (11), and the column prestressed steel bars (10) pass through the reserved long holes (11) in the fan foundation column prefabricated blocks (2).

2. The prefabricated fan foundation according to claim 1, characterized in that: A bottom plate joint surface (7) is provided between adjacent fan foundation bottom plate prefabricated blocks (1), and a coating layer is coated on the bottom plate joint surface (7).

3. The prefabricated fan foundation according to claim 1, characterized in that: The fan foundation bottom plate prefabricated block (1) is rectangular, circular, annular or arc-shaped.

4. The prefabricated fan foundation according to claim 1, characterized in that: A column splicing surface (12) is provided between adjacent fan foundation column prefabricated blocks (2), and a coating layer is coated on the column splicing surface (12).

5. The prefabricated fan foundation according to claim 1, characterized in that: The fan foundation column prefabricated block (2) is decomposed into 2, 3, 4, 5, 6 or 8 blocks.

6. The prefabricated fan foundation according to claim 1, characterized in that: The fan foundation bottom plate prefabricated block (1) and the fan foundation column prefabricated block (2) are made of high-strength concrete.

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