Round beam plate type fan foundation based on prefabrication process

Abstract

The utility model discloses a circular beam plate type fan foundation based on a prefabrication process. The circular beam plate type fan foundation comprises a foundation plate, a foundation ring and a plurality of ribbed beams, the foundation ring is mounted in the center of the inner ring; the foundation plate is formed by fixedly splicing an inner ring, a middle ring and an outer ring; the ribbed beam is composed of profile steel, longitudinal steel bars arranged on the profile steel, stirrups arranged on the longitudinal steel bars and concrete poured outside. An inner pre-stress ring is arranged on the inner ring, a middle pre-stress ring is arranged on the middle ring, and an outer pre-stress ring is arranged on the outer ring; and a plurality of radial prestressed steel wires penetrating through the inner ring, the middle ring and the outer ring are arranged on the foundation plate. According to the foundation, a large amount of concrete pouring operation on site is avoided, the site workload is reduced, the construction period is shortened, the whole foundation has high bending resistance, durability and fatigue resistance, and construction operation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan installation foundation structure technical field, concretely relates to a circular beam slab formula fan foundation based on prefabrication technology. BACKGROUND

[0002] The wind turbine generator set foundation is a concrete structure for fixing the set, which not only bears the weight of the set and the tower, but also resists the maximum overturning load of the set to ensure the safe operation of the set under various loads. The traditional wind turbine generator set foundation usually adopts a pile cap foundation, which is embedded with a section of tower (foundation ring), and the tower flange and the foundation ring flange are connected during installation of the set. The foundation construction needs to be poured in place as a whole, which requires a large amount of time for on-site steel binding, formwork support, and concrete curing. The precision of on-site layout and formwork support is difficult to guarantee, and since the wind field is located in a remote mountainous area, the transportation distance is long, and the transportation conditions are poor, the concrete cannot be used as commercial concrete, and usually it is mixed on site. This results in that the quality of mixed concrete is affected by many factors, and it is difficult to guarantee the quality of mixed concrete. The utility model patent with the authorization announcement number CN111411642B discloses a rib beam type fan foundation, which comprises: a foundation ring; a prefabricated module surrounding the foundation ring and fixedly connected with the foundation ring; wherein the prefabricated module comprises a plurality of convex prefabricated modules and a plurality of concave prefabricated modules arranged alternately along the circumference of the foundation ring. The utility model reduces the proportion of wet work, shortens the construction period of the fan foundation during installation of the wind turbine generator, and can save energy and protect the environment, but the structure is divided into a rib and a bottom plate as a whole, which is heavy and inconvenient for transportation and on-site installation. SUMMARY

[0003] The utility model aims at providing a circular beam slab type fan foundation based on prefabrication technology, which avoids a large amount of concrete pouring on site, reduces the on-site workload, shortens the construction period, has strong overall bending resistance, durability, and fatigue resistance, and is convenient for construction.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A circular beam slab type fan foundation based on prefabrication technology, comprising a foundation plate, a foundation ring fixedly arranged on the top of the foundation plate, and a plurality of rib beams obliquely arranged between the foundation plate and the foundation ring, wherein the foundation plate is fixedly spliced by an inner ring, a middle ring, and an outer ring, the inner ring is spliced by a plurality of inner monomers, the middle ring is spliced by a plurality of middle monomers, and the outer ring is spliced by a plurality of outer monomers; the foundation ring is installed at the center of the inner ring; an inner prestressed ring is arranged on the inner ring, a middle prestressed ring is arranged on the middle ring, and an outer prestressed ring is arranged on the outer ring.

[0006] Preferably, the vertical section of the inner monomer is inverted T-shaped; two sides of the vertical section of the inner monomer are provided with stepped connecting parts, and the axial positions of adjacent two inner monomers are limited by the stepped connecting parts.

[0007] Preferably, an adapter steel ring is fixedly installed on the outer side of the foundation ring, and one end of the rib beam is fixedly installed on the adapter steel ring.

[0008] Preferably, the middle ring is fixedly connected with the inner ring and the outer ring through clamping pieces; and clamping holes matched with the clamping pieces are arranged on the inner ring, the middle ring and the outer ring.

[0009] Preferably, the clamping piece is a double trapezoid with large ends and a small middle.

[0010] Preferably, the top of the vertical section of the inner monomer is provided with a plurality of right-angle connecting pieces, and the other ends of the plurality of right-angle connecting pieces are fixedly connected with the foundation ring.

[0011] Preferably, the rib beam is composed of a profile steel, longitudinal steel bars arranged on the profile steel, stirrups arranged on the longitudinal steel bars and concrete poured outside.

[0012] Preferably, an inner pipeline is pre-embedded in the inner ring, two ends of the inner pipeline are obliquely crossed out of the upper surface of the inner ring, an inner prestress ring is installed in the inner pipeline; a middle pipeline is pre-embedded in the middle ring, two ends of the middle pipeline are obliquely crossed out of the upper surface of the middle ring, a middle prestress ring is installed in the middle pipeline; and an outer pipeline is pre-embedded in the outer ring, two ends of the outer pipeline are obliquely crossed out of the upper surface of the outer ring, an outer prestress ring is installed in the outer pipeline.

[0013] Preferably, a plurality of radial prestress steel wires are arranged on the foundation plate and penetrate the inner ring, the middle ring and the outer ring.

[0014] In the utility model, in the construction, the prefabricated structure and the on-site construction operation mode are adopted, the overall construction period is improved, each structure is split into a plurality of units, the component size, volume and weight can be reduced, the component transportation and hoisting difficulty are greatly reduced, and the operation flexibility is improved. The force transmitted by the upper structure is uniformly transmitted to the foundation soil through the foundation plate, the foundation plate has a large area to disperse the load, and the stability of the foundation is ensured. The rib beam enhances the spatial stability of the connection between the foundation plate and the foundation ring, effectively resists the bending moment, and more effectively transmits the upper load to other parts of the foundation. The rib beam is assembled on site, can adapt to certain installation errors, and is convenient for on-site operation.

[0015] The inner prestress ring, the middle prestress ring, the outer prestress ring and the radial prestress steel wire are arranged after the foundation plate is assembled, prestress is applied, the foundation plate has strong structural stability, and force transmission is facilitated.

[0016] The prefabricated mode can quickly construct the foundation of the fan on site, avoids the problem of affecting the construction period and construction quality due to the remote construction site. The prefabricated component is produced and processed in a factory, is not limited by the climate, site and other conditions of the construction site, and can be operated in parallel with other on-site construction procedures. When assembling on site, only the prefabricated components need to be assembled and prestressed, without wet operation procedures, so that the construction quality is guaranteed and the construction time is shortened. The prefabricated component produced in the factory adopts a standardized production process and quality detection process, and can strictly control the quality of raw materials, concrete mixing ratio, steel bar processing and installation and the like, thereby effectively guaranteeing the overall quality of the fan foundation and reducing the risk of fan operation failure or safety accidents caused by foundation quality problems. The prefabricated assembly construction reduces the dust, noise and other pollution generated by on-site concrete mixing, pouring and the like, and also reduces the amount of construction waste generated on site. Moreover, due to the shortened construction period, the energy consumption in the construction process is reduced, which meets the concept of green building and sustainable development. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of an overall structure of the utility model;

[0018] Figure 2 is a schematic diagram of an inner single body structure of the utility model;

[0019] Figure 3 is a schematic diagram of a prestressed ring arrangement of the utility model;

[0020] In the figure: 1, base plate; 2, base ring; 3, rib beam; 4, clamping piece; 5, connecting bolt; 6, connecting plate; 7, right-angle connecting piece; 8, adapter steel ring; 10, inner ring; 11, middle ring; 12, outer ring; 13, stepped connecting part; 14, inner prestressed ring; 15, middle prestressed ring; 16, outer prestressed ring; 17, radial prestressed steel wire. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with the drawings:

[0022] For example, Figure 1 , Figure 2 and Figure 3The circular beam slab type fan foundation based on prefabrication process shown comprises a foundation plate 1, a foundation ring 2 fixedly arranged on the top of the foundation plate 1 and a plurality of rib beams 3 obliquely arranged between the foundation plate 1 and the foundation ring 2, the foundation plate 1 is fixedly spliced by an inner ring 10, a middle ring 11 and an outer ring 12, when the volume of the foundation plate 1 is large, a plurality of middle rings 11 can be arranged. The inner ring 10 is spliced by a plurality of inner monomers, the middle ring 11 is spliced by a plurality of middle monomers, and the outer ring 12 is spliced by a plurality of outer monomers, the inner monomer, the middle monomer and the outer monomer are all reinforced concrete prefabricated components. The reinforced concrete prefabricated component is prefabricated in the factory in advance before construction.

[0023] An inner prestressed ring 14 is arranged on the inner ring 10, a middle prestressed ring 15 is arranged on the middle ring 11, and an outer prestressed ring 16 is arranged on the outer ring 12. Specifically, an inner pipeline is pre-embedded in the inner ring 10, the two end portions of the inner pipeline are obliquely crossed and pass through the upper surface of the inner ring 10, a plurality of corresponding middle pipelines are closed after a plurality of middle monomers are spliced into the middle ring 11, the inner prestressed ring 14 is installed in the inner pipeline, and prestress is applied to the end portion and is sealed. A middle pipeline is pre-embedded in the middle ring 11, the two end portions of the middle pipeline are obliquely crossed and pass through the upper surface of the middle ring 11, a plurality of corresponding middle pipelines are closed after a plurality of middle monomers are spliced into the middle ring 11, the middle prestressed ring 15 is installed in the middle pipeline, and prestress is applied to the end portion and is sealed.

[0024] An outer pipeline is pre-embedded in the outer ring 13, the two ends of the outer pipeline are obliquely crossed and pass through the upper surface of the outer ring 13, a plurality of corresponding outer pipelines are closed after a plurality of outer monomers are spliced into the outer ring 12, the outer prestressed ring 16 is installed in the outer pipeline, and prestress is applied to the end portion and is sealed.

[0025] A plurality of radial prestressed steel wires 17 are arranged on the foundation plate 1 and pass through the inner ring 10, the middle ring 11 and the outer ring 12. Specifically, radial through holes are arranged at corresponding positions of the inner ring 10, the middle ring 11 and the outer ring 12, the radial prestressed steel wire 17 is installed in the corresponding radial through hole, and prestress is applied to the radial prestressed steel wire 17. Thus, the prestress applied to the foundation plate 1 is completed, and the durability and service life thereof are improved.

[0026] The vertical section of the inner monomer is inverted T-shaped; the two sides of the vertical part of the inner monomer are provided with a stepped connection part 13, and the axial positions of adjacent two inner monomers are limited by the stepped connection part 13. The middle ring 11 is fixedly connected with the inner ring 10 and the outer ring 12 through the clamping piece 4; the inner ring 10, the middle ring 11 and the outer ring 12 are provided with clamping holes matched with the clamping piece 4, and after the two corresponding clamping holes are spliced, the clamping piece 4 is installed in the holes, thereby realizing the fixed connection of adjacent inner ring 10 and middle ring 11 or middle ring 11 and outer ring 12. In a preferred embodiment, the clamping piece 4 is a double-trapezoidal structure with large ends and small middle, and of course it can also be dumbbell-shaped. A connecting platform is fixedly arranged at the top side of the inner monomer, a connecting bolt 5 is arranged on the connecting platform, and the two connecting bolts 5 are connected through a plurality of connecting plates 6, and the connecting plates 6 are provided with a waist-shaped hole to adapt to a certain installation error and facilitate on-site construction work.

[0027] The foundation ring 2 is installed at the center of the inner ring 10, and the vertical part of the inner monomer is provided with a plurality of right-angle connecting pieces 7 at the top, and the other end of the right-angle connecting piece 7 is fixedly connected with the foundation ring 2. Specifically, a plurality of anchor plates are pre-embedded at the top of the vertical part of the inner monomer, the right-angle connecting piece 7 is fixedly installed on the anchor plate through welding or bolts, and a plurality of anchor bolts are pre-embedded on the side surface of the foundation ring 2, and the other end of the right-angle connecting piece 7 is fixedly connected with the anchor bolt.

[0028] The rib beam 3 is composed of a profile steel, a plurality of longitudinal steel bars arranged around the profile steel, a stirrup fixedly arranged on the longitudinal steel bars, and concrete poured outside. The profile steel can be made of I-beam, cross-shaped steel or other cross-sectional steel materials, and after being manufactured, the profile steel is exposed at both ends of the rib beam 3, thereby facilitating the fixation with the foundation plate 1 and the foundation ring 2. Of course, in order to facilitate the connection, a steel plate or a steel block is fixedly installed at both ends of the rib beam 3, thereby facilitating the welding fixation with the foundation plate 1 and the foundation ring 2. In a preferred embodiment, an adapter steel ring 8 is fixedly installed on the outside of the foundation ring 2, and one end of the rib beam 3 is fixedly installed on the adapter steel ring 8 through welding. Of course, a steel plate for connecting with the rib beam 3 can also be pre-embedded when the foundation ring 2 is poured.

Claims

1. A circular beam and slab type fan foundation based on a precast process, comprising a foundation slab, a foundation ring fixedly arranged on the top of the foundation slab, and a plurality of rib beams obliquely arranged between the foundation slab and the foundation ring, characterized in that: The base plate is fixedly spliced by an inner ring, a middle ring and an outer ring, the inner ring is spliced by a plurality of inner monomers, the middle ring is spliced by a plurality of middle monomers, and the outer ring is spliced by a plurality of outer monomers; the base ring is installed at the center of the inner ring; an inner pre-stress ring is arranged on the inner ring, a middle pre-stress ring is arranged on the middle ring, and an outer pre-stress ring is arranged on the outer ring.

2. The precast process based circular pad footing for windmill foundation as claimed in claim 1 wherein: The vertical section of the inner monomer is in inverted T shape; both sides of the vertical part of the inner monomer are provided with stepped connecting parts, and the axial positions of adjacent two inner monomers are limited by the stepped connecting parts.

3. The precast process based circular pad footing for windmill foundation as claimed in claim 1 wherein: An adapter steel ring is fixedly installed outside the base ring, and one end of the rib beam is fixedly installed on the adapter steel ring.

4. The precast process based circular pad footing for windmill as claimed in claim 1 or 2 wherein: The middle ring is fixedly connected with the inner ring and the outer ring through clamping pieces; clamping holes matched with the clamping pieces are arranged on the inner ring, the middle ring and the outer ring.

5. The precast process based circular pad footing for windmill as claimed in claim 4 wherein: The clamping piece is a double trapezoid with large ends and a small middle.

6. The precast process based circular pad footing for windmill as claimed in claim 2 wherein: A plurality of right-angle connecting pieces are arranged at the top of the vertical part of the inner monomer, and the other ends of the plurality of right-angle connecting pieces are fixedly connected with the base ring.

7. The precast process based circular pad footing for windmill as claimed in claim 1 or 3 wherein: The rib beam is composed of a profile steel, longitudinal steel bars arranged on the profile steel, stirrups arranged on the longitudinal steel bars and concrete poured outside.

8. The precast process based circular pad footing for windmill as claimed in claim 1 wherein: An inner pipeline is pre-embedded in the inner ring, both ends of the inner pipeline are obliquely crossed out of the upper surface of the inner ring, and the inner pre-stress ring is installed in the inner pipeline; a middle pipeline is pre-embedded in the middle ring, both ends of the middle pipeline are obliquely crossed out of the upper surface of the middle ring, and the middle pre-stress ring is installed in the middle pipeline; an outer pipeline is pre-embedded in the outer ring, both ends of the outer pipeline are obliquely crossed out of the upper surface of the outer ring, and the outer pre-stress ring is installed in the outer pipeline.

9. The precast process based circular pad footing for windmill as claimed in claim 7 wherein: A plurality of radial pre-stress steel wires are arranged on the base plate and pass through the inner ring, the middle ring and the outer ring.

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