Full-dry connection prestress assembly type concrete fan foundation and assembling method

Abstract

The invention discloses a full-dry connection prestress assembly type concrete fan foundation and an assembling method, the fan foundation is annular, a water collecting well is formed in an inner cavity, and the fan foundation comprises a plurality of unit bodies evenly distributed in the axial direction; each unit body comprises a fan-shaped bottom plate; a rib beam in a trapezoidal plate shape is arranged on each bottom plate; each rib beam is vertically arranged on the corresponding bottom plate, the upper end of each rib beam is provided with a bracket extending in the axis direction of the fan foundation, and the two sides of each rib beam are each provided with a matched fan-shaped clamping groove; the width of the part, extending in the axis direction of the fan foundation, of each bracket is gradually reduced, and the width of the part, located over the ribbed beams, of each bracket is the same as that of the corresponding ribbed beams; each pair of fan-shaped clamping grooves comprises two tenon structures which are parallel to the side surfaces of the corresponding rib beams and are far away from the corresponding rib beams to form grooves; and a fan-shaped precast concrete coping is arranged between the two ribbed beams of every two unit bodies and on the corresponding tenon structures. The construction period can be effectively shortened, and the influence of a construction site on the environment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a fully dry-connected prestressed assembled concrete fan foundation and an assembling method. Background Art

[0002] Traditional wind turbine foundations mostly use on-site cast-in-place integral reinforced concrete foundations. This method requires a lot of manpower, has a long construction period, and the construction quality is easily affected by environmental factors such as temperature and humidity. Construction cannot be carried out at low temperatures, affecting the overall construction progress of the project.

[0003] Prefabricated concrete components can accurately control the quality of components, and the production environment is stable, which can effectively reduce quality defects. At the same time, it can reduce the amount of wet work on site, reduce dust and wastewater emissions, have significant environmental benefits, and avoid construction delays caused by bad weather. At present, there are few prefabricated foundations used on wind turbine towers. Prefabricated foundations in other fields are mostly semi-prefabricated and semi-cast-in-place, which cannot avoid wet work on site.

[0004] Therefore, how to realize a prefabricated and assembled concrete wind turbine foundation with high efficiency and moisture-free operation in the construction of wind power generation equipment has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a fully dry-connected prestressed assembled concrete fan foundation and an assembly method, the purpose of which is to realize a prefabricated assembled concrete fan foundation with high efficiency and no wet operation in the construction of wind power generation equipment.

[0006] To achieve the above-mentioned purpose, the present invention discloses a fully dry-connected prestressed assembled concrete fan foundation, which is annular and includes a plurality of unit bodies uniformly distributed around the axial direction;

[0007] Each of the unit bodies comprises a bottom plate, a rib beam, a corbel and a fan-shaped slot;

[0008] Each of the bottom plates is fan-shaped, and is provided with the rib beam in the shape of a trapezoidal plate;

[0009] All inner holes formed by the bottom plates are water collection holes with a size of 500mm-1000mm;

[0010] Each of the rib beams is vertically arranged on the corresponding bottom plate, and the midpoint plane in the thickness direction passes through the axis of the corresponding bottom plate that bisects the corresponding fan-shaped surface. The upper end is provided with the bracket extending in the axial direction of the fan foundation, and both sides are respectively provided with matching fan-shaped slots;

[0011] The width of one end of each of the brackets extending toward the axis direction of the fan foundation gradually decreases and each bracket has a hole parallel to the axis direction of the fan foundation;

[0012] The width of each of the brackets extending toward the axis of the fan foundation gradually decreases, and the width of the portion located directly above the rib beam is the same as that of the corresponding rib beam;

[0013] Each pair of the fan-shaped slots includes two tenon structures which are parallel to the side surfaces of the corresponding rib beam and are away from the corresponding rib beam to form a groove;

[0014] The upper surface of each of the tenon structures is located below the lower surface of the portion of the corresponding corbel extending in the axial direction of the fan foundation, and matches with the corresponding groove of another unit body located on the corresponding side of the corresponding unit body, and can be inserted into the corresponding groove along the axial direction of the fan foundation;

[0015] Between the two rib beams of every two of the unit bodies, a fan-shaped precast concrete cap is provided on the upper side of the corresponding fan-shaped slot.

[0016] Preferably, each of the rib beams is in the shape of a right-angled trapezoid, and the portion facing the outside of the fan foundation is inclined.

[0017] Preferably, the top of each of the precast concrete caps is flush with the top of the corresponding corbel, and a replaceable prestressed anchor bolt is provided between each of the corresponding tenon structures.

[0018] More preferably, each of the tenon structures is provided with two or more of the replaceable prestressed anchor bolts.

[0019] Preferably, each of the base plates is provided with a nut corresponding to each reserved hole for setting the replaceable prestressed anchor bolt.

[0020] The present invention also discloses a method for assembling a fully dry-connected prestressed assembled concrete fan foundation, comprising the following steps:

[0021] Step 1: Ensure that the height difference of the site is within ±10mm, mark the installation position of each unit body in the site, control the hoisting position deviation within ±5mm, and hoist the first unit body;

[0022] Step 2, hoisting the next unit body, and interlocking and fixing it with the adjacent unit body that has been in place through the fan-shaped slot, and controlling the horizontal position deviation within 10mm;

[0023] Step 3, installing the precast concrete capping on the top of each of the fan-shaped slots, the capping 5 is provided with a reserved hole for a replaceable prestressed anchor bolt 6, and the reserved hole needs to be aligned with the reserved hole of the column 4;

[0024] Step 4: Repeat steps 2 to 3 until all the unit bodies are installed.

[0025] Preferably, in step 3, the reserved holes of each precast concrete cap for setting replaceable prestressed anchor bolts are aligned with the reserved holes of the corresponding fan-shaped slots for setting replaceable prestressed anchor bolts, and then two groups of replaceable prestressed anchor bolts made of M42 carbon steel are tightened with the corresponding nuts on the corresponding base plates to fasten the corresponding precast concrete caps and the corresponding fan-shaped slots.

[0026] Preferably, the width of the connection gap between the precast concrete capping and the corresponding unit body after tightening does not exceed 1 mm.

[0027] Beneficial effects of the present invention:

[0028] The structural design of the present invention fully considers the convenience of construction, has low requirements on the professional skills of construction personnel, can simplify the assembly process, effectively shorten the construction period, reduce the impact of the construction site on the environment, and reduce the overall construction cost.

[0029] Compared with cast-in-place foundations and semi-prefabricated semi-cast-in-place foundations, the present invention has the advantages of strong adaptability, high assembly efficiency, and wet-free operation. In addition, the unique mortise and tenon-like structure naturally has strong stability, and the vertical prestress applied by the anchor bolts can ensure the strength of the connection parts and the overall rigidity.

[0030] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of an embodiment of the present invention is shown.

[0032] Figure 2 A schematic diagram of the three-dimensional structure of a single unit body in one embodiment of the present invention is shown.

[0033] Figure 3 A schematic diagram of the structure of a single unit body in a top view in one embodiment of the present invention is shown.

[0034] Figure 4 A schematic diagram of the three-dimensional structure of two spliced ​​unit bodies in one embodiment of the present invention is shown.

[0035] Figure 5 A schematic diagram of the structure of two spliced ​​unit bodies in a top view in one embodiment of the present invention is shown. DETAILED DESCRIPTION

[0036] Example

[0037] like Figures 1 to 5As shown, the fully dry-connected prestressed assembled concrete fan foundation is annular and includes a number of unit bodies evenly distributed around the axial direction;

[0038] Each unit body comprises a bottom plate 1, a rib beam 2, a corbel 3 and a fan-shaped slot 4;

[0039] Each bottom plate 1 is fan-shaped, and is provided with a rib beam 2 in the shape of a trapezoidal plate;

[0040] The inner holes surrounded by all the bottom plates 1 are water collection holes with a size of 500mm-1000mm;

[0041] Each rib beam 2 is vertically arranged on the corresponding bottom plate 1, and the mid-dividing plane in the thickness direction passes through the axis of the corresponding bottom plate 1 that bisects the corresponding sector surface. The upper end is provided with a corbel 3 extending in the axial direction of the fan foundation, and both sides are provided with matching sector-shaped slots 4;

[0042] The width of one end of each bracket 3 extending toward the axis direction of the fan foundation gradually decreases and each bracket 3 has a hole 31 parallel to the axis direction of the fan foundation;

[0043] The width of each bracket 3 extending toward the axis of the fan foundation gradually decreases, and the width of the portion located directly above the rib beam 2 is the same as that of the corresponding rib beam 2;

[0044] Each pair of fan-shaped slots 4 includes two tenon structures 41 which are parallel to the side surfaces of the corresponding rib beam 2 and are away from the corresponding rib beam 2 to form a groove 42;

[0045] The upper surface of each tenon structure 41 is located below the lower surface of the portion of the corresponding corbel 3 extending in the axial direction of the fan foundation, and matches with the corresponding groove 42 of another unit body located on the corresponding side of the corresponding unit body, and can be inserted into the corresponding groove 42 along the axial direction of the fan foundation;

[0046] Between the two rib beams 2 of every two unit bodies, a fan-shaped precast concrete cap 5 is provided on the upper side of the corresponding fan-shaped slot 4 .

[0047] In the present invention, the unit bodies of the concrete precast parts are fixed by special mortise and tenon joints through fan-shaped slots 4 to offset horizontal and radial stresses. A precast concrete cap 5 is also arranged on the fan-shaped slots 4 to achieve close connection between the segments, thereby connecting the base segments into one and effectively transferring the load.

[0048] In some embodiments, each rib beam 2 is in the shape of a right-angled trapezoid, and the portion facing the outside of the wind turbine foundation is inclined.

[0049] In some embodiments, the top of each precast concrete cap 5 is flush with the top of the corresponding corbel 3 , and a replaceable prestressed anchor bolt 6 is provided between each corresponding tenon structure 41 .

[0050] The precast concrete cap 5 and two adjacent precast concrete parts are fastened by replaceable prestressed anchor bolts 6 to form a rigid connection.

[0051] In some embodiments, each tenon structure 41 is provided with two or more replaceable prestressed anchor bolts 6 .

[0052] In some embodiments, each base plate 1 is provided with a nut corresponding to each reserved hole for setting a replaceable prestressed anchor bolt 6 .

[0053] The present invention also discloses a method for assembling a fully dry-connected prestressed assembled concrete fan foundation, comprising the following steps:

[0054] Step 1: Ensure that the height difference of the site is within ±10mm, mark the installation position of each unit in the site, control the hoisting position deviation within ±5mm, and hoist the first unit;

[0055] Step 2: hoist the next unit body, and fix it to the adjacent unit body in place through the fan-shaped slot 4, and control the horizontal position deviation within 10mm;

[0056] Step 3, install a precast concrete capping 5 on the top of each fan-shaped slot 4. The capping 5 is provided with a reserved hole for a replaceable prestressed anchor bolt 6, and the reserved hole needs to be aligned with the reserved hole of the column 4;

[0057] Step 4: Repeat steps 2 to 3 until all units are installed.

[0058] In some embodiments, in step 3, the reserved holes of each precast concrete cap 5 for setting the replaceable prestressed anchor 6 are aligned with the reserved holes of the corresponding fan-shaped slots 4 for setting the replaceable prestressed anchor 6, and then two groups of replaceable prestressed anchors 6 made of M42 carbon steel are tightened with corresponding nuts on the corresponding base plate 1 to fasten the corresponding precast concrete cap 5 and the corresponding fan-shaped slots 4.

[0059] In some embodiments, the width of the connection gap between the precast concrete capping 5 and the corresponding unit body after tightening does not exceed 1 mm.

[0060] The above technical means can ensure a rigid connection.

[0061] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. Fully dry-connected prestressed assembled concrete fan foundation; characterized in that: The fan foundation is annular and includes a number of unit bodies evenly distributed around the axial direction; Each of the unit bodies comprises a bottom plate (1), a rib beam (2), a corbel (3) and a fan-shaped slot (4); Each of the bottom plates (1) is fan-shaped, and is provided with the rib beam (2) in the shape of a trapezoidal plate; All inner holes formed by the bottom plates (1) are water collection holes with a size of 500 mm to 1000 mm; Each of the rib beams (2) is vertically arranged on the corresponding base plate (1), and a mid-section plane in the thickness direction passes through the axis of the corresponding base plate (1) bisecting the corresponding sector-shaped surface, and the upper end is provided with a bracket (3) extending in the axial direction of the fan foundation, and both sides are respectively provided with matching sector-shaped slots (4); The width of one end of each of the brackets (3) extending in the direction of the axis of the fan foundation gradually decreases, and each bracket has a hole (31) parallel to the axis of the fan foundation; The width of the portion of each of the brackets (3) extending in the direction of the fan foundation axis gradually decreases, and the portion located directly above the rib beam (2) has the same width as the corresponding rib beam (2); Each pair of the fan-shaped slots (4) comprises two tenon structures (41) which are parallel to the side surfaces of the corresponding rib beam (2) and are away from the corresponding rib beam (2) to form a groove (42); The upper surface of each of the tenon structures (41) is located below the lower surface of the portion of the corresponding corbel (3) extending in the axial direction of the fan foundation, and matches with the corresponding groove (42) of another unit body located on the corresponding side of the corresponding unit body, and can be inserted into the corresponding groove (42) along the axial direction of the fan foundation; Between the two rib beams (2) of each two of the unit bodies, a fan-shaped prefabricated concrete top (5) is provided on the upper side of the corresponding fan-shaped slot (4).

2. The fully dry-connected prestressed assembled concrete fan foundation according to claim 1 is characterized in that: Each of the rib beams (2) is in the shape of a right-angled trapezoid, and the portion facing the outside of the fan foundation is inclined.

3. The fully dry-connected prestressed assembled concrete fan foundation according to claim 1 is characterized in that: The top of each precast concrete cap (5) is flush with the top of the corresponding corbel (3), and a replaceable prestressed anchor bolt (6) is provided between each corresponding tenon structure (41).

4. The fully dry-connected prestressed assembled concrete fan foundation according to claim 3 is characterized in that: Each of the tenon structures (41) is provided with two or more replaceable prestressed anchor bolts (6).

5. The fully dry-connected prestressed assembled concrete fan foundation according to claim 1 is characterized in that: Each of the base plates (1) is provided with a nut corresponding to each reserved hole for arranging the replaceable prestressed anchor bolt (6).

6. The method for assembling a fully dry-connected prestressed assembled concrete fan foundation according to claim 1, characterized in that: The steps include: Step 1: Ensure that the height difference of the site is within ±10mm, mark the installation position of each unit body in the site, control the hoisting position deviation within ±5mm, and hoist the first unit body; Step 2, hoisting the next unit body, and interlocking and fixing it with the adjacent unit body that has been in place through the fan-shaped slot (4), and controlling the horizontal position deviation within 10 mm; Step 3, installing the precast concrete capping (5) on the top of each of the fan-shaped slots (4), wherein the capping 5 is provided with a reserved hole for a replaceable prestressed anchor bolt 6, and the reserved hole needs to be aligned with the reserved hole of the column 4; Step 4: Repeat steps 2 to 3 until all the unit bodies are installed.

7. The method for assembling a fully dry-connected prestressed assembled concrete fan foundation according to claim 5, characterized in that: In step 3, the reserved hole of each precast concrete cap (5) for setting the replaceable prestressed anchor bolt (6) is aligned with the reserved hole of the corresponding fan-shaped slot (4) for setting the replaceable prestressed anchor bolt (6), and then two groups of the replaceable prestressed anchor bolts (6) made of M42 carbon steel are tightened with the corresponding nuts on the corresponding base plate (1) to fasten the corresponding precast concrete cap (5) and the corresponding fan-shaped slot (4).

8. The method for assembling a fully dry-connected prestressed assembled concrete fan foundation according to claim 7, characterized in that: The width of the connection gap between the precast concrete capping (5) and the corresponding unit body after being tightened does not exceed 1 mm.

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