Prestressed concrete square pile and support connecting structure for water photovoltaic project

Abstract

The invention discloses a connecting structure of a prestressed concrete square pile and a bracket for an overwater photovoltaic project. The connecting structure mainly comprises a pile head end plate with a bolt through hole, a connecting screw rod for connecting a foundation pile and the bracket, and a column foot bottom plate with an adjustable mounting angle. Bolt connection of the prestressed concrete square pile head and the support structure can be effectively achieved, no welding procedure exists on site, potential safety hazards caused by welding operation in an overwater area are avoided, the construction cost is reduced, and the construction period is shortened. The pile head end plate, the connecting screw rod and the column base bottom plate are all machined and formed in a factory, the process is simple, and the quality is reliable. Except for the pile head end plate, the finished square pile has no other special difference from a common square pile, conventional machinery can be adopted for construction, and no extra construction cost input exists. The column base bottom plate with the arc-shaped hole effectively solves the problems that due to the fact that the orientation is inconsistent during precast pile construction, bolts are twisted and deviated, and a support is difficult to install.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power generation engineering structure design, and in particular relates to a prestressed concrete square pile and bracket connection structure for a water photovoltaic project. Background Art

[0002] Photovoltaic power generation is a power generation technology that uses solar panels (modules) to directly convert light energy into electrical energy. Its energy comes from solar energy and is a clean, safe and renewable energy source.

[0003] The support system of photovoltaic sub-array components usually consists of a support structure and a foundation. When prestressed concrete square piles are used for the foundation of the photovoltaic support piles on the water, the square piles are not isotropic in shape, and it is difficult to accurately control the direction of the foundation piles during construction. As a result, the connection between the support and the square piles cannot be made using the clamp connection method used for traditional round pipe piles. The usual solution is welding. Welding construction will cause the following problems: ① Due to the large number of photovoltaic supports, the welding workload is large and the construction period is long; ② Difficulty in welding operations on the water: There are high safety risks in live operations on the water; if in frozen areas, choose to construct after the water surface freezes in winter. Although it can avoid welding operations on the water, the quality of the welds is difficult to control due to the low temperature in winter, and the cost of large-scale winter measures is high. Summary of the invention

[0004] In order to solve the technical problems of "large welding workload, long construction period, difficult welding operation and difficult to control weld quality" existing in the background technology, the present invention designs a prestressed concrete square pile and bracket connection structure for water photovoltaic projects.

[0005] To achieve the above-mentioned purpose of the invention, the present invention provides a prestressed concrete square pile and bracket connection structure for a water photovoltaic project, characterized in that a pile head end plate is provided at the top of the square pile as a whole with the square pile, a column foot bottom plate is provided at the bottom of the bracket, a screw through hole for inserting a screw is provided on the pile head end plate, the screw through holes are arranged on the same circumference with the center of the square pile as the center, and are symmetrically arranged, a screw through hole blocking shell is provided at the bottom of the screw through hole, and symmetrical arc-shaped through holes are opened on the column foot bottom plate with the screw as the center, the square pile and the bracket are connected by the screw passing through the screw through hole on the pile head end plate and the arc-shaped through hole on the column foot bottom plate, the top of the screw is a regular hexagonal steel rod inscribed in the nominal diameter of the screw, and the regular hexagonal steel rod is the force application point of the wrench.

[0006] The screw is a full-thread straight screw.

[0007] The screw rod also includes a matching nut, a spring washer and a flat washer.

[0008] The pile head and end plate are processed and formed as a whole with the prestressed concrete square pile, and the bolt holes are filled with foam blocks for protection when leaving the factory. Except for the pile head and end plate, the finished square pile has no other special differences from ordinary square piles, so conventional machinery can be used for construction.

[0009] After the on-site foundation pile construction is in place, the screw rod and the prestressed concrete square pile are assembled, the foam protection block in the bolt through hole is removed, the bolt through hole is cleaned, the bolt sealing and locking glue is injected into the bolt through hole, the screw rod is screwed into the bolt through hole, and the bolt sealing and locking glue is filled and overflowed in the hole.

[0010] After the bolt sealing and locking glue is cured, the photovoltaic support column with the column foot bottom plate is installed on the square pile head, and the directions of the photovoltaic sub-array columns are adjusted to be consistent using the arc-shaped through holes, and the nuts are tightened to complete the bolt connection between the support structure and the square pile.

[0011] The beneficial effects of the present invention are: 1. It can effectively realize the screw connection between the prestressed concrete square pile and the bracket structure, without any welding process on site, avoiding the safety hazards caused by welding operations in the water area, reducing construction costs, and saving construction time. 2. The pile head end plate, screw rod, and column foot bottom plate are all processed and formed in the factory, with simple process and reliable quality. 3. Except for the pile head end plate, the finished square pile of the present invention has no other special difference from the ordinary square pile, and can be constructed by conventional machinery without additional construction cost investment. 4. The column foot bottom plate with arc-shaped through holes effectively solves the problems of screw torsional deviation and bracket installation difficulties caused by inconsistent orientation during prefabricated pile construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of a prestressed concrete square pile and support connection structure;

[0013] Figure 2 A schematic plan view of a pile head end plate of the present invention;

[0014] Figure 3 yes Figure 2 AA section diagram of the pile head end plate;

[0015] Figure 4 A schematic diagram of a screw rod of the present invention;

[0016] Figure 5 Schematic diagram of the installation of the support column foot base plate of the present invention.

[0017] Among them, 1. Pile head end plate; 11. Prestressed tendon installation hole; 12. Screw through hole sealing shell; 13. Screw through hole; 2. Screw; 2a. Nut; 2b. Spring washer; 2c. Flat washer; 21. Regular hexagonal steel rod; 22. Thread; 3. Column foot bottom plate; 31. Arc through hole; 4. Square pile. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, a prestressed concrete square pile and support connection structure mainly includes: a pile head end plate 1, a screw rod 2, and a column foot bottom plate 3.

[0019] The pile head end plate 1 is provided with an additional screw hole 13 without changing the position 11 of the square pile prestressed tendon installation hole, and a screw hole blocking shell 12 is provided at the bottom of the screw hole 13, so that the screw hole forms an independent cavity, ensuring that the screw hole is not contaminated by concrete during the processing of the square pile. The position of the screw hole is determined by the force calculation of the upper support structure, and the position of the support column should also be considered. The screw holes are arranged on the same circumference with the center of the square pile as the center, and the force is most reasonable when they are symmetrically arranged.

[0020] The screw rod 2 connecting the square pile and the bracket is a full-thread straight screw rod, and the top of the screw rod is processed into a regular hexagonal steel rod 21 inscribed in the nominal diameter of the screw rod to provide a force point for the tightening wrench. The screw rod also includes its matching nut 2a, spring washer 2b, and flat washer 2c.

[0021] The column foot bottom plate 3 is provided with symmetrical arc-shaped through holes 31 corresponding to the screw rod passing position on each pile head end plate, with the screw rod as the center. Figure 5 The arc-shaped through hole in the example is opened based on the circumference of the screw. Only in this way can it match the rotation and adjust the direction.

[0022] The pile head end plate 1 is integrally formed with the prestressed concrete square pile 4, and the bolt through hole 13 is filled with foam blocks for protection when leaving the factory. Except for the pile head end plate, the finished square pile has no other special difference from the ordinary square pile, so conventional machinery can be used for construction.

[0023] After the on-site square pile construction is in place, the screw 2 and the prestressed concrete square pile 4 are assembled, the foam protection block in the screw through hole 13 is removed, the screw through hole 13 is cleaned, and the bolt sealing and locking glue is injected into the screw through hole 13. The screw 2 is screwed into the screw through hole 13, and the screw sealing and locking glue is filled and overflowed in the screw through hole 13.

[0024] After the bolt sealing and locking glue is cured, the photovoltaic support column with the column foot bottom plate 3 is installed on the pile head. The column foot bottom plate and the square pile are matched. The arc-shaped through hole 31 is used to adjust the directions of the columns of the photovoltaic sub-array to make them consistent, and the nuts are tightened to complete the screw connection between the support structure and the square pile.

[0025] It should be noted that those who refer to this disclosure should readily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application (e.g., the size, scale, shape and proportion of each component, installation arrangement, material, anti-corrosion method, color, etc.). For example, the prestressing tendon holes on the end plate shown can be changed due to different pile types, and the position, number, and specifications of the screw through holes can be changed or varied. Therefore, all such modifications are intended to be included within the scope of the present invention.

[0026] It should be noted that the 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A prestressed concrete square pile and bracket connection structure for a water photovoltaic project, characterized in that: A pile head end plate (1) is provided at the top of the square pile (4) and is integrated with the square pile. A column foot bottom plate (3) is provided at the bottom of the bracket. A screw through hole (13) for inserting a screw (2) is provided on the pile head end plate (1). The screw through holes are arranged on the same circumference with the center of the square pile (4) as the center and are symmetrically arranged. A screw through hole blocking shell (12) is provided at the bottom of the screw through hole (13). Symmetrical arc through holes (31) are opened on the column foot bottom plate (3) with the screw (2) as the center. The square pile (4) and the bracket are connected by the screw (2) passing through the screw through hole (13) on the pile head end plate (1) and the arc through hole (31) on the column foot bottom plate (3). The top of the screw is a regular hexagonal steel rod inscribed in the nominal diameter of the screw. The regular hexagonal steel rod is the force application point of the wrench.

2. According to claim 1, a prestressed concrete square pile and bracket connection structure for a water photovoltaic project is characterized in that: The screw (2) is a full-thread straight screw.

3. The prestressed concrete square pile and bracket connection structure for a water photovoltaic project according to claim 1 is characterized in that: The screw rod (2) also includes a matching nut (2a), a spring washer (2b), and a flat washer (2c).

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