Novel offshore photovoltaic support prefabricated bearing platform inclined pile foundation and installation method thereof

Abstract

The invention provides a novel offshore photovoltaic support prefabricated bearing platform inclined pile foundation which is used for supporting a photovoltaic support, the photovoltaic support extends out of the water surface, the novel offshore photovoltaic support prefabricated bearing platform inclined pile foundation comprises a prefabricated concrete bearing platform and a plurality of prefabricated concrete inclined piles, and the prefabricated concrete bearing platform is arranged below the water surface and supported on the seabed mud surface; a plurality of precast concrete inclined piles penetrate through the edge of the precast concrete bearing platform at equal intervals and are inserted into a seabed mud surface; and a main upright post of the photovoltaic bracket penetrates through the center of the precast concrete bearing platform and is inserted into the seabed mud surface. The device has the advantages of reasonable structural design, reduction of offshore construction links, reduction of construction difficulty, economy, convenience, effective reduction of cost and facilitation of large-scale popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic power generation, and in particular to a novel offshore photovoltaic support prefabricated pedestal inclined pile foundation and an installation method thereof. Background Art

[0002] At present, problems such as shortage of traditional energy and deterioration of the natural environment are becoming increasingly serious. Vigorously developing new energy industries based on photovoltaics can replace fossil fuels.

[0003] Offshore photovoltaics is an emerging area of ​​solar energy utilization that has experienced rapid growth in recent years. Currently, offshore photovoltaic projects primarily utilize large-span offshore photovoltaic platforms, each supported by four pile foundations. Due to the unique characteristics of the marine environment, pile foundations are subject to significant stress. Steel pipe piles are typically used, which consumes a large amount of steel, is costly, and requires complex construction. The four piles must be installed simultaneously to minimize relative displacement.

[0004] Therefore, how to consider the construction methods and approaches of offshore photovoltaic foundations during the design phase to reduce costs and shorten the construction period is an important research direction in the future offshore photovoltaic field. Summary of the Invention

[0005] The purpose of the present invention is to provide a new offshore photovoltaic bracket prefabricated pedestal inclined pile foundation and its installation method, which adopts a combination of precast concrete pedestals and precast concrete inclined piles to improve the horizontal bearing capacity of the entire structure, reduce offshore construction links, reduce construction difficulty, be more economical, reduce costs, and be conducive to large-scale promotion.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions: A new type of offshore photovoltaic bracket prefabricated pedestal inclined pile foundation is used to support the photovoltaic bracket. The photovoltaic bracket extends out of the water and includes a precast concrete pedestal and several precast concrete inclined piles. The precast concrete pedestal is arranged below the water surface and supported on the seabed mud surface. Several precast concrete inclined piles are equidistantly penetrated at the edge of the precast concrete pedestal and inserted into the seabed mud surface. The main column of the photovoltaic bracket passes through the center of the precast concrete pedestal and is inserted into the seabed mud surface.

[0007] Furthermore, there are three precast concrete inclined piles.

[0008] Furthermore, the connecting parts between the precast concrete inclined piles or the main columns of the photovoltaic support and the precast concrete cap are fixed into an integrated structure by grouting.

[0009] Furthermore, the through holes connecting the precast concrete inclined piles and the precast concrete caps are, from top to bottom, flared inclined pile holes and columnar inclined pile holes, and the flared inclined pile holes and columnar inclined pile holes form an integrated structure.

[0010] Furthermore, the through holes connecting the main columns of the photovoltaic bracket and the precast concrete pedestal are cup-shaped pile holes and columnar pile holes from top to bottom, and the cup-shaped pile holes and the columnar pile holes form an integrated structure.

[0011] Furthermore, for offshore shallow waters, the tops of the precast concrete inclined piles extend out of the water, and the length of the main columns of the photovoltaic bracket is reduced, thereby increasing the torsional resistance of the main columns and reducing the grouting workload.

[0012] A novel method for installing an inclined pile foundation of a precast pedestal for an offshore photovoltaic support comprises the following steps: S1) fabricating a precast concrete pedestal and precast concrete inclined piles according to actual engineering parameters; S2) hoisting the precast concrete pedestal so that it is supported on the seabed mud surface; S3) inserting three precast concrete inclined piles through flared inclined pile holes into the precast concrete pedestal, and then through columnar inclined pile holes into the seabed mud surface to complete pile sinking; S4) inserting the main column of the photovoltaic support into the center of the precast concrete pedestal by hoisting equipment, and then inserting it into the seabed mud surface for further fixation; S5) grouting the interspace between the precast concrete inclined pile and the precast concrete pedestal by grouting equipment, and simultaneously grouting the interspace between the main column of the photovoltaic support and the precast concrete pedestal by grouting equipment; S6) completing the installation of the entire device after the grouting layer solidifies.

[0013] Furthermore, in step S5), the grouting layer is flush with the top surface of the precast concrete cap.

[0014] Further, all steps are repeated until the photovoltaic array is installed.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention provides a novel prefabricated pedestal inclined pile foundation for offshore photovoltaic supports and an installation method thereof. The combination of prefabricated concrete pedestals and prefabricated concrete inclined piles is used to improve the horizontal bearing capacity of the entire structure. The structure is reasonably designed, reduces offshore construction links, reduces construction difficulty, is economical and convenient, effectively reduces costs, and is conducive to large-scale promotion. Specifically, the inclined pile structure bears external horizontal forces, and the inclined pile structure can convert the horizontal forces into pressure and tension on the inclined piles, thereby improving the overall horizontal bearing capacity of the structure; the main structure adopts prefabricated concrete pedestals and prefabricated concrete inclined piles, which can reduce the amount of steel used, improve offshore construction efficiency, and reduce overall costs; the pedestal and the inclined piles are connected by grouting to form a whole, thereby improving structural reliability; the three-pile foundation type can well solve the torsion resistance problem of the upper single column structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structural assembly of the present invention.

[0017] Figure 2It is a schematic diagram of the planar structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the elevation structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the upper column connection structure of the present invention.

[0020] Figure 5 It is a schematic flow chart of the installation method of the present invention.

[0021] Figure numerals: 1. Photovoltaic bracket; 11. Main column; 2. Precast concrete pedestal; 21. Flared inclined pile hole; 22. Columnar inclined pile hole; 23. Cup-shaped pile hole; 24. Columnar pile hole; 3. Precast concrete inclined pile; 4. Mud surface; 5. Water surface; 6. Grouting layer. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

[0023] like Figure 1 、 2 As shown in Figures 3 and 4, a new type of precast pedestal inclined pile foundation for offshore photovoltaic brackets is used to support a photovoltaic bracket 1. The photovoltaic bracket 1 extends out of the water surface 5 and includes a precast concrete pedestal 2 and a number of precast concrete inclined piles 3. The precast concrete pedestal 2 is arranged below the water surface 5 and supported on the seabed mud surface 4. A number of precast concrete inclined piles 4 are equidistantly passed through the edge of the precast concrete pedestal 3 and inserted into the seabed mud surface 4. The main column 11 of the photovoltaic bracket 1 passes through the center of the precast concrete pedestal 2 and is inserted into the seabed mud surface 4.

[0024] Specifically, the precast concrete cap 2 is 1-2 meters high, and there are three precast concrete inclined piles 3 with an inclination of 1:5. The tops of the precast concrete inclined piles 3 are 0.5-1 meters higher than the top of the precast concrete cap 2. The precast concrete inclined piles or the main columns 11 of the photovoltaic support 1 and the precast concrete cap 2 are connected and fixed to form an integrated structure by grouting, forming a grouting layer 6.

[0025] Preferably, the three precast concrete inclined piles 3 are evenly arranged in a ring shape and are arranged as close to the outer edge of the precast concrete cap 2 as possible, so as to increase the torsional rigidity.

[0026] Preferably, the through-holes connecting the precast concrete inclined piles 3 and the precast concrete cap 2 are, from top to bottom, a flared inclined pile hole 21 and a columnar inclined pile hole 22, and the flared inclined pile hole 21 and the columnar inclined pile hole 22 form an integrated structure. The through-holes connecting the main column 11 of the photovoltaic support 1 and the precast concrete cap 2 are, from top to bottom, a cup-shaped pile hole 23 and a columnar pile hole 24, and the cup-shaped pile hole 23 and the columnar pile hole 24 form an integrated structure.

[0027] For offshore shallow waters, the tops of the precast concrete inclined piles 3 extend out of the water surface 5 , and the length of the main columns 11 of the photovoltaic support 1 is reduced, thereby increasing the torsional resistance of the main columns 11 and reducing the grouting workload.

[0028] like Figure 5 As shown, a novel installation method for a precast pedestal inclined pile foundation of an offshore photovoltaic support comprises the following steps: S1) completing the production of a precast concrete pedestal 2 and precast concrete inclined piles 3 according to actual engineering parameters; S2) completing the hoisting of the precast concrete pedestal 2 so that it is supported on the seabed mud surface 4; S3) inserting three precast concrete inclined piles 3 through the flared inclined pile holes 21 into the precast concrete pedestal 2, and then inserting them into the seabed mud surface 4 through the columnar inclined pile holes 22 to complete the pile sinking; S4) inserting the main column 11 of the photovoltaic support 1 into the center of the precast concrete pedestal 2 by the hoisting equipment, and inserting it into the seabed mud surface 4 for further fixation; S5) grouting the gap between the precast concrete inclined pile 3 and the precast concrete pedestal 2 by the grouting equipment, and at the same time, grouting the gap between the main column 11 of the photovoltaic support 1 and the precast concrete pedestal 2 by the grouting equipment; S6) waiting for the grouting layer 6 to solidify to complete the installation of the entire device.

[0029] Furthermore, in step S5), the grouting layer 6 is flush with the top surface of the precast concrete cap 2 .

[0030] Repeat all installation steps until the PV array is installed.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A new type of prefabricated sloping pile foundation for offshore photovoltaic support, used to support the photovoltaic support, the photovoltaic support extends out of the water, characterized by: It includes a precast concrete pedestal and several precast concrete inclined piles. The precast concrete pedestal is arranged below the water surface and supported on the seabed mud surface. Several precast concrete inclined piles are equidistantly passed through the edge of the precast concrete pedestal and inserted into the seabed mud surface. The main column of the photovoltaic bracket passes through the center of the precast concrete pedestal and is inserted into the seabed mud surface.

2. The novel prefabricated cap inclined pile foundation for offshore photovoltaic support according to claim 1 is characterized by: There are three precast concrete inclined piles.

3. A novel prefabricated cap inclined pile foundation for offshore photovoltaic support according to claim 1 or 2, characterized in that: The connecting parts between the precast concrete inclined piles or the main columns of the photovoltaic support and the precast concrete cap are respectively connected and fixed into an integrated structure by grouting.

4. The novel prefabricated cap inclined pile foundation for offshore photovoltaic support according to claim 3 is characterized by: The through holes connecting the precast concrete inclined piles and the precast concrete caps are, from top to bottom, flared inclined pile holes and columnar inclined pile holes, and the flared inclined pile holes and the columnar inclined pile holes form an integrated structure.

5. The novel prefabricated cap inclined pile foundation for offshore photovoltaic support according to claim 3 is characterized by: The through holes between the main columns of the photovoltaic bracket and the precast concrete pedestal are cup-shaped pile holes and columnar pile holes from top to bottom, and the cup-shaped pile holes and the columnar pile holes form an integrated structure.

6. The novel prefabricated cap inclined pile foundation for offshore photovoltaic support according to claim 1 is characterized by: For offshore shallow waters, the tops of the precast concrete inclined piles extend out of the water, and the length of the main columns of the photovoltaic support is reduced, thereby increasing the torsional resistance of the main columns and reducing the grouting workload.

7. A new method for installing a prefabricated sloping pile foundation for offshore photovoltaic support, characterized in that The method comprises the following steps: S1) completing the production of precast concrete caps and precast concrete inclined piles according to actual engineering parameters; S2) completing the hoisting of the precast concrete cap so that it is supported on the seabed mud surface; S3) inserting three precast concrete inclined piles through the flared inclined pile holes into the precast concrete cap, and then inserting them into the seabed mud surface through the columnar inclined pile holes to complete the pile sinking; S4) inserting the main column of the photovoltaic bracket into the center of the precast concrete cap through the hoisting equipment, and inserting it into the seabed mud surface for further fixation; S5) using the grouting equipment to grout the gap between the precast concrete inclined piles and the precast concrete cap, and at the same time, using the grouting equipment to grout the gap between the main column of the photovoltaic bracket and the precast concrete cap; S6) completing the installation of the entire device after the grouting layer solidifies.

8. The method for installing a novel prefabricated cap and inclined pile foundation for an offshore photovoltaic support according to claim 7, characterized in that: In step S5), the grouting layer is flush with the top surface of the precast concrete cap.

9. The method for installing a novel prefabricated cap and inclined pile foundation for an offshore photovoltaic support according to claim 7, characterized in that: Repeat all steps until the PV array is installed.

Images