Combined prefabricated photovoltaic pipe pile

Abstract

The utility model provides a combined type prefabricated photovoltaic pipe pile, the combined type prefabricated photovoltaic pipe pile comprises an upper pile and a lower pile, the upper pile comprises a first thin pile section and a first thick pile section in sequence from top to bottom along the vertical direction, the lower end of the first thick pile section is connected with the top of the lower pile, and the first thin pile section is connected with the top of the lower pile. The first thick pile section is provided with a first frustum section which extends towards the first thin pile section in a reducing manner; the outer diameter of the bottom of the first thick pile section is smaller than or equal to the outer diameter of the top of the lower pile, and the outer diameter of the first thin pile section is larger than the inner diameter of the first thick pile section. The precast piles with different thicknesses are spliced to form the whole photovoltaic pipe pile, the diameter of the pile body can be optimized according to the magnitude of the borne bending moment under offshore complex seawater and seabed soil layers, the pile diameter is reduced at the position where the bending moment is small so that application of pile body materials can be reduced, the bearing capacity of the pile body can be matched with the magnitude distribution of the borne bending moment, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model relates to precast piles, and more particularly to combined precast photovoltaic pipe piles. Background Technology

[0002] Photovoltaic power generation, as an important green, clean, and renewable energy source, has experienced rapid development in China. Compared to onshore photovoltaic power generation, the ocean offers greater coverage, unobstructed waters, longer and more abundant sunshine, significantly increasing power generation. Therefore, some regions in China have already conducted a series of explorations and applications of offshore photovoltaic power generation.

[0003] Offshore photovoltaic (PV) systems are mainly divided into two categories: pile-based and floating. Currently, pile-based PV systems are the primary type. Simply put, pile-based PV systems have their supports deeply embedded in the soil or sandstone layers below sea level. Precast piles are widely used in offshore PV projects due to their adaptability, flexibility, and high construction efficiency.

[0004] The foundations for offshore photovoltaic systems need to withstand the harsh near-shore environment, including significant wave and current forces. Therefore, large-diameter precast piles are typically driven into the soil after penetrating seawater to depths of tens of meters. However, if... Figure 1 As shown, the photovoltaic (PV) piles in offshore solar power typically experience maximum bending moment several meters below the mud surface, after which the bending moment gradually decreases vertically upwards and downwards. Therefore, using precast piles of uniform diameter directly as the foundation for PV piles results in excessive material usage in areas with low bending moment, leading to high costs. Furthermore, a larger upper diameter increases the wave-crossing area, placing higher demands on the load-bearing performance of the PV piles, which requires further optimization and cost reduction. Utility Model Content

[0005] The technical problem this invention aims to solve is the high cost of pile foundation construction due to the unreasonable design of existing offshore photovoltaic piles.

[0006] To address the aforementioned problems, this utility model provides a combined prefabricated photovoltaic pipe pile, which includes an upper pile and a lower pile. The upper pile includes a first thin pile segment and a first thick pile segment vertically from top to bottom. The lower end of the first thick pile segment is connected to the top of the lower pile, and the first thick pile segment has a first frustum-shaped segment that extends towards the first thin pile segment with a narrower diameter. The outer diameter of the bottom of the first thick pile segment is less than or equal to the outer diameter of the top of the lower pile, and the outer diameter of the first thin pile segment is greater than the inner diameter of the first thick pile segment.

[0007] As a preferred technical solution, in the combined precast photovoltaic pipe pile provided by this utility model, the upper pile has a prestressed steel cage inside, the length of the first thick pile section is less than the length of the first thin pile section, and the first thin pile section is at least a cylindrical section at the top.

[0008] As a preferred technical scheme, the length of the lower pile is greater than or equal to the length of the upper pile, and preferably the length of the lower pile is 1.2 times or more of the length of the upper pile.

[0009] As a preferred technical scheme, the first thick pile section further has a lower cylindrical section at the bottom of the first conical section, and the maximum outer diameter of the lower cylindrical section is less than or equal to the outer diameter of the top of the lower pile.

[0010] As a preferred technical scheme, the length of the lower cylindrical section is 1.1 times or more of the length of the first conical section.

[0011] As a preferred technical scheme, the lower cylindrical section is embedded with a plurality of vertical non-prestressed tendons, and each non-prestressed tendon is distributed circumferentially around the central axis of the upper pile.

[0012] As a preferred technical scheme, the top of the non-prestressed tendon is bent and inclined to extend to the first conical section in the direction of the central axis of the upper pile.

[0013] And / or, the top of each non-prestressed tendon is arranged in an up-and-down staggered manner;

[0014] And / or, the upper part of each non-prestressed tendon is circumferentially connected and fixed by a ring-shaped frame stand tendon.

[0015] And / or, the first conical section is embedded with a non-prestressed tendon, and the two ends of the non-prestressed tendon are bent and extended to the first thin pile section and the lower cylindrical section.

[0016] As a preferred technical scheme, the lower pile comprises a middle pile and a bottom pile in sequence along the vertical direction.

[0017] The bottom pile comprises a second thick pile section and a second thin pile section in sequence from top to bottom along the vertical direction, and the second thick pile section has a second conical section that is tapered and extended to the second thin pile section.

[0018] The top of the second thick pile section is connected to the bottom of the middle pile, and the outer diameter of the second thin pile section is greater than the inner diameter of the second thick pile section.

[0019] As a preferred technical scheme, the taper value of the second conical section is greater than or equal to the taper value of the first conical section.

[0020] As a preferred technical scheme, the taper value of the second conical section is greater than 1.5 times of the taper value of the first conical section.

[0021] As a preferred technical solution, the first thin pile section is provided with annular bamboo joints or radial protrusions at a position close to the top, or the second thin pile section is provided with annular bamboo joints at a position close to the bottom on the combined prefabricated photovoltaic pipe pile provided by the utility model.

[0022] And / or, the first thick pile section is welded and fixed with the middle pile end plate.

[0023] And / or, the middle pile is welded and fixed with the second thick pile section end plate.

[0024] And / or, the outer wall of the upper pile and / or the outer wall of the end plate of the lower pile is coated with a corrosion-resistant coating.

[0025] And / or, the outer wall of the first thin pile section and / or the first conical section is coated or wrapped with a light reflection layer.

[0026] As a preferred technical solution, the middle pile is a prestressed concrete pipe pile or a UHPC pipe pile or a steel pipe pile on the combined prefabricated photovoltaic pipe pile provided by the utility model.

[0027] The utility model discloses the beneficial effects of:

[0028] The combined prefabricated photovoltaic pipe pile provided by the utility model comprises an upper pile and a lower pile, the upper pile comprises a first thin pile section and a first thick pile section in sequence from top to bottom in the vertical direction, the lower end of the first thick pile section is connected with the top of the lower pile, and the first thick pile section has a first conical section extending in the diameter direction to the first thin pile section, wherein the outer diameter of the bottom of the first thick pile section is less than or equal to the outer diameter of the top of the lower pile, and the outer diameter of the first thin pile section is greater than the inner diameter of the first thick pile section. The prefabricated photovoltaic pipe pile with the structure is made of prefabricated piles with different diameters, and the diameter of the whole photovoltaic pipe pile is obtained by splicing. The diameter of the pile body can be optimized according to the bending moment size under the complex seawater and seabed soil layer of the offshore area, the diameter of the pile body is reduced at the position with small bending moment to reduce the application of the pile body material, the lower pile makes the bearing capacity and stress size distribution of the pile body match, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a bending moment schematic diagram of a photovoltaic pipe pile in a horizontal stress state in a certain sea area in the background art;

[0030] Figure 2 It is a front view of the combined prefabricated photovoltaic pipe pile in embodiment one of the utility model;

[0031] Figure 3 It is a front view of the combined prefabricated photovoltaic pipe pile in embodiment two of the utility model;

[0032] Figure 4 It is a connection schematic diagram of the end plate and the non-prestressed tendon in embodiment two of the utility model;

[0033] Figure 5 This is a perspective view of the upper pile in Embodiment 2 of this utility model;

[0034] Figure 6 This is a front view of the combined prefabricated photovoltaic pipe pile in Embodiment 3 of this utility model.

[0035] In the picture:

[0036] 100. Modular prefabricated photovoltaic pipe piles;

[0037] 1. Upper pile; 11. First thin pile segment; 12. First truncated cone segment; 13. Lower cylindrical segment; 14. End plate; 15. Ring-shaped bamboo joint; 16. Non-prestressed tendon; 17. Non-prestressed tendon; 18. Ring-shaped support reinforcement;

[0038] 2. Lower pile; 21. Middle pile; 22. Bottom pile; 221. Second coarse pile section; 222. Second fine pile section; 223. Second truncated cone section;

[0039] 3. Pile tip. Detailed Implementation

[0040] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the drawings, not all of them.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0042] like Figure 2 As shown, this embodiment provides a modular prefabricated photovoltaic pipe pile 100. This modular prefabricated photovoltaic pipe pile 100 adopts an assembly structure, specifically including an upper pile 1 and a lower pile 2. The bottom of the upper pile 1 and the top of the lower pile 2 are connected and fixed by welding end plates 14. In addition, in this embodiment, to facilitate the efficiency and quality of pile driving construction, a pile tip 3 is connected and fixed to the bottom of the lower pile 2.

[0043] In the embodiment, to improve the corrosion resistance of the combined prefabricated photovoltaic pipe pile 100 in the marine beach environment, the outer wall of the upper pile 1, the outer wall of the lower pile 2, and the outer wall of the end plate 14 can be coated with a corrosion-resistant coating. Of course, to improve the pile connection efficiency and the durability of the pile body quality, the bottom of the upper pile 1 and the top of the lower pile 2 can also be connected and fixed by a mechanical connection joint not shown in the figure.

[0044] In the embodiment, as an important technical solution, the upper pile 1 includes a first thin pile section 11 and a first thick pile section in sequence from top to bottom along the vertical direction, the lower end of the first thick pile section is connected with the top of the lower pile 2, and the first thick pile section has a first frustum section 12 extending in the diameter direction to the first thin pile section 11; wherein the outer diameter of the bottom of the first thick pile section is less than or equal to the outer diameter of the top of the lower pile 2, and the outer diameter of the first thin pile section 11 is greater than the inner diameter of the first thick pile section. The size design of the upper pile 1 can effectively prestress the upper pile 1.

[0045] In the embodiment, as a preferred embodiment, the length of the lower pile 2 is greater than or equal to the length of the upper pile 1, and more preferably the length of the lower pile 2 is 1.2 times or more of the length of the upper pile 1. Thus, by lengthening the lower pile, the stability of the combined pile body can be improved.

[0046] In addition, to ensure the bending and shearing resistance of the upper pile 1 under the action of waves and swells, a prestressed steel reinforcement cage is arranged in the upper pile 1 of the combined prefabricated photovoltaic pipe pile 100 provided in the embodiment, and the steel reinforcement cage is formed by PC steel bars and spiral stirrups not shown in the figure and is prestressed and tensioned by a cage. In addition, the length of the first thick pile section is preferably less than the length of the first thin pile section 11, and at least the top of the first thin pile section 11 is a cylindrical section.

[0047] The combined prefabricated photovoltaic pipe pile 100 provided in the embodiment is made of prefabricated piles of different thicknesses according to the horizontal stress characteristics of the photovoltaic pile, and the whole photovoltaic pipe pile is made by splicing, which can optimize the pile body diameter according to the bending moment size under the complex seawater and seabed soil layer in the offshore area, reduce the pile diameter in the part with small bending moment to reduce the application of pile body material, ensure the bending stress resistance of the pile body in the part with large bending moment, match the pile body bearing capacity with the stress size distribution, and reduce the cost.

[0048] In the embodiment, to fully utilize the pile body function of the exposed water surface part of the combined prefabricated photovoltaic pipe pile 100, a light reflecting layer not shown in the figure can be coated or wrapped on the outer wall of the first thin pile section 11 and the first frustum section 12, thereby facilitating the full play of the power generation function of the double-sided photovoltaic panel at the top of the prefabricated photovoltaic pipe pile.

[0049] In the embodiment, for the convenience of hoisting and construction of the combined prefabricated photovoltaic pipe pile 100, the first thin pile section 11 is provided with a ring-shaped knot 15 or radial protrusion at a position close to the top, which is used to axially position the steel wire rope when the pile body is hoisted, thereby improving the convenience and safety of construction, as shown in Figure 2 Of course, the first thin pile section 11 is provided with two ring-shaped knots 15 or radial protrusions at a position close to the top and vertically spaced, so that the photovoltaic mounting bracket can be vertically limited. Embodiment two

[0050] In the embodiment, the same parts as in embodiment one are given the same reference numerals, and the same textual description is omitted.

[0051] As shown in Figures 3 to 5 Compared with embodiment one, the first thick pile section of the combined prefabricated photovoltaic pipe pile 100 provided in the embodiment further has a lower cylindrical section 13 at the bottom of the first conical section 12. Preferably, the length of the lower cylindrical section 13 is 1.1 times or more, preferably 2 times or more, of the length of the first conical section 12, so as to sufficiently ensure the stability of the upper pile structure counterweight; in addition, in order to facilitate the pile connection construction of the upper pile 1 and the lower pile 2 and ensure the pile connection quality, the maximum outer diameter of the lower cylindrical section 13 is less than or equal to the outer diameter of the top of the lower pile 2.

[0052] In the embodiment, in order to strengthen the bending and shear mechanical properties of the pile body, a plurality of vertical non-prestressed tendons 16 are embedded in the lower cylindrical section 13 of the combined prefabricated photovoltaic pipe pile 100 provided in the embodiment, and the non-prestressed tendons 16 are distributed in a circumferential direction around the central axis of the upper pile 1 at intervals, as shown in Figure 4 In order to further comprehensively exert the mechanical strengthening effect of the non-prestressed tendons 16 and improve the bending and shear mechanical properties of the first thick pile section, the upper portions of the non-prestressed tendons 16 are circumferentially connected and fixed by ring-shaped stand tendons 18. Alternatively, the first conical section 12 is pre-embedded with non-prestressed tendons 17, and the two ends of the non-prestressed tendons 17 are bent and extended to the first thin pile section 11 and the lower cylindrical section 13.

[0053] Of course, in order to avoid the bending and shear mechanical properties from suddenly changing at the same height position of the pile body, the top portions of the non-prestressed tendons 16 are arranged in an up-and-down staggered manner on the combined prefabricated photovoltaic pipe pile 100 provided in the embodiment.

[0054] In addition, compared with the combined prefabricated photovoltaic pipe pile 100 provided in embodiment one, the length of the first conical section 12 in the embodiment is shorter, and in order to improve the bending and shear mechanical properties of the short-size first conical section 12, the top portion of the non-prestressed tendon 16 is bent and inclined to extend to the first conical section 12 in the direction of the central axis of the upper pile 1, thereby forming a non-prestressed tendon bending portion 17, as shown in Figure 4 . Embodiment three

[0055] In this embodiment, the same parts as in Embodiments One or Two are given the same reference numerals, and the same textual description is omitted.

[0056] As shown in Figure 6 , compared with Embodiments One and Two, the combined prefabricated photovoltaic pipe pile 100 provided in this embodiment comprises, in sequence along the vertical direction, a middle pile 21 and a bottom pile 22.

[0057] The bottom pile 22 comprises, in sequence along the vertical direction from top to bottom, a second thick pile section 221 and a second thin pile section 222, and the second thick pile section 221 has a second frustum section 223 extending in diameter to the second thin pile section 222. The top of the second thick pile section 221 is connected to the bottom of the middle pile 21, and the outer diameter of the second thin pile section 222 is greater than the inner diameter of the second thick pile section 221. That is, the entire combined prefabricated photovoltaic pipe pile 100 has a structure of being thick in the middle and thin at both ends, which is beneficial to further optimizing the pile body diameter according to the size of the bending moment borne, thereby further reducing the material cost of the pile body.

[0058] As shown in Figure 6 , in the combined prefabricated photovoltaic pipe pile 100 provided in this embodiment, the taper value of the second frustum section 223 is greater than the taper value of the first frustum section 12. Preferably, the taper value of the second frustum section 223 is greater than 1.5 times the taper value of the first frustum section 12. Such a design can optimize the turning end bearing force and improve the vertical mechanical bearing performance of the pile body. In the combined prefabricated photovoltaic pipe pile 100 provided in the present application, the taper value of the second frustum section 223 can also be equal to the taper value of the first frustum section 12.

[0059] To improve the stability of the pile body, at least one annular node 15 is arranged on the second thin pile section 222 at a position close to the bottom to strengthen the biting force of the bottom end of the bottom pile 22 and the soil body around the pile. In this embodiment, the first thick pile section and the top end plate 14 of the middle pile 21 are welded and fixed. Of course, the middle pile 21 and the end plate 14 of the second thick pile section 221 can also be welded and fixed.

[0060] The combined prefabricated photovoltaic pipe pile 100 provided in this embodiment has a middle pile 21 of prestressed concrete pipe pile. To improve the performance under large bending moment stress, the middle pile 21 is preferably a UHPC pipe pile (i.e., an ultra-high performance concrete pile). Of course, the combined prefabricated photovoltaic pipe pile 100 provided in the present application can also directly use a steel pipe pile for the middle pile 21 to reduce the manufacturing difficulty.

[0061] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A combined prefabricated photovoltaic pipe pile, comprising an upper pile and a lower pile, characterized in that, The upper pile includes a first thin pile segment and a first thick pile segment in the vertical direction from top to bottom. The lower end of the first thick pile segment is connected to the top of the lower pile, and the first thick pile segment has a first truncated cone segment that extends towards the first thin pile segment with a narrower diameter. Wherein, the outer diameter of the bottom of the first thick pile segment is less than or equal to the outer diameter of the top of the lower pile, and the outer diameter of the first thin pile segment is greater than the inner diameter of the first thick pile segment.

2. The combined prefabricated photovoltaic pipe pile according to claim 1, characterized in that, The upper pile has a prestressed steel cage inside, the length of the first thick pile segment is less than the length of the first thin pile segment, and the first thin pile segment is at least cylindrical at the top.

3. The combined prefabricated photovoltaic pipe pile according to claim 1, characterized in that, The length of the lower pile is greater than or equal to the length of the upper pile.

4. The combined prefabricated photovoltaic pipe pile according to claim 2, characterized in that, The length of the lower pile is more than 1.2 times the length of the upper pile.

5. The combined prefabricated photovoltaic pipe pile according to claim 1, characterized in that, The first coarse pile segment also has a lower cylindrical segment located at the bottom of the first truncated cone segment, the maximum outer diameter of the lower cylindrical segment being less than or equal to the top outer diameter of the lower pile.

6. The combined prefabricated photovoltaic pipe pile according to claim 5, characterized in that, The length of the lower cylindrical segment is more than 1.1 times the length of the first frustum segment.

7. The combined prefabricated photovoltaic pipe pile according to claim 5, characterized in that, Several vertical non-prestressed tendons are embedded in the lower cylindrical section, and each of the non-prestressed tendons is circumferentially distributed around the central axis of the upper pile.

8. The combined prefabricated photovoltaic pipe pile according to claim 7, characterized in that, The non-prestressed tendon has a bent portion that bends and extends obliquely towards the central axis of the upper pile to the first truncated cone section. And / or, the top heights of each of the non-prestressed tendons are staggered vertically; And / or, the upper part of each of the non-prestressed tendons is circumferentially connected and fixed by annular support bars; And / or, the first truncated cone section is pre-embedded with non-prestressed tendons, the two ends of which are bent and extended to the first thin pile section and the lower cylindrical section.

9. The combined prefabricated photovoltaic pipe pile according to claim 1 or 5, characterized in that, The lower pile includes a middle pile and a bottom pile in sequence along the vertical direction; wherein, the bottom pile includes a second thick pile segment and a second thin pile segment in sequence from top to bottom along the vertical direction, and the second thick pile segment has a second frustum-shaped segment that extends towards the second thin pile segment with a reduced diameter; The top of the second thick pile segment is connected to the bottom of the middle pile, and the outer diameter of the second thin pile segment is larger than the inner diameter of the second thick pile segment.

10. The combined prefabricated photovoltaic pipe pile according to claim 9, characterized in that, The taper value of the second frustum segment is greater than or equal to the taper value of the first frustum segment.

11. The combined prefabricated photovoltaic pipe pile according to claim 10, characterized in that, The taper value of the second frustum segment is 1.5 times greater than the taper value of the first frustum segment.

12. The combined prefabricated photovoltaic pipe pile according to claim 9, characterized in that, The first thin pile segment has a ring-shaped bamboo joint or radial protrusion near the top, or the second thin pile segment has a ring-shaped bamboo joint near the bottom; And / or, the first thick pile segment is welded and fixed to the end plate of the middle pile; And / or, the central pile is welded and fixed to the end plate of the second thick pile segment; And / or, the outer walls of the upper pile and / or lower pile, and the outer walls of the end plate are coated with an anti-corrosion coating; And / or, the outer wall of the first thin pile segment and / or the first truncated cone segment is coated or covered with a light-reflecting layer.

13. The combined prefabricated photovoltaic pipe pile according to claim 9, characterized in that, The central pile is a prestressed concrete pipe pile, a UHPC pipe pile, or a steel pipe pile.

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