Pile foundation and photovoltaic system

Abstract

The application discloses a pile foundation and a photovoltaic system, and belongs to the technical field of photovoltaic technology. The pile foundation comprises a pile cap assembly, a pile cap body and a plurality of assembly sleeves arranged on the pile cap body, the pile cap body is used for supporting a photovoltaic support, and a channel is formed in the assembly sleeve; a plurality of pipe piles correspond to the plurality of assembly sleeves one by one, each pipe pile partially extends into the corresponding channel, and each pipe pile and the corresponding assembly sleeve are arranged in an inclined manner, wherein the inclined directions of at least two pipe piles are different, a force transmission member is arranged on the outer circumferential wall of each pipe pile, and the force transmission member is connected with the assembly sleeve. Through the structural design of the pipe pile arranged in the inclined manner, the assembly sleeve and the force transmission member are arranged on the pile cap body, the fatigue risk of the connecting part is reduced, the long-term reliability and stability of the pile foundation and the photovoltaic support are improved, the service life of the pile foundation is prolonged, the construction efficiency is improved, and the manufacturing, transportation and construction costs are saved.

Description

Technical Field

[0001] This application belongs to the field of photovoltaic technology, and in particular relates to a pile foundation and a photovoltaic system. Background Technology

[0002] Currently, most common pile foundations use vertical piles connected to a pile cap. However, in practical applications, due to the complex and diverse geographical environment, such as undulating terrain and varying geological conditions, vertical piles often cannot meet the support requirements of photovoltaic (PV) supports under different working conditions. To better adapt to complex terrain and improve the bearing capacity and stability of pile foundations, inclined piles are gradually being applied to the pile foundations of PV supports.

[0003] However, the assembly between the inclined piles and the pile cap often has shortcomings: due to the variety of inclination angles and directions of the inclined piles, traditional connection methods (such as simple insertion, screwing or welding) are difficult to guarantee the firmness and are prone to loosening, displacement or damage under wind loads, seismic loads or long-term use.

[0004] For example, some related technologies directly adopt the common rigid connection method between vertical piles and pile caps, but the change in inclination angle of inclined piles leads to stress concentration and fatigue at the connection points; other technologies attempt to strengthen the structure by adding connectors, but the structure is complex and inconvenient to install, which not only increases costs but also fails to effectively solve the problem of coordinated support of multi-directional inclined piles. Utility Model Content

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a pile foundation and photovoltaic system that reduces the fatigue risk at the connection points, improves the long-term reliability and stability of the pile foundation and photovoltaic support, increases construction efficiency, and saves manufacturing, transportation, and construction costs.

[0006] In a first aspect, this application provides a pile foundation for use in photovoltaic supports, comprising:

[0007] The support frame assembly includes a support frame body and a plurality of mounting sleeves disposed on the support frame body. The support frame body is used to support the photovoltaic bracket, and the mounting sleeves form a channel inside.

[0008] Multiple pipe piles are provided, each corresponding to a plurality of mounting sleeves. Each pipe pile extends into the corresponding channel, and each pipe pile and its corresponding mounting sleeve are inclined. At least two of the pipe piles are inclined in different directions. Each pipe pile has a force transmission component installed on its outer peripheral wall, and the force transmission component is connected to the mounting sleeve.

[0009] According to the pile foundation of this application, the structural design of installing the inclined pipe piles onto the pile cap body with the matching sleeve and force transmission components solves the problems of loosening, displacement or damage that are prone to occur when the traditional inclined piles are directly connected to the pile cap body. It increases the connection strength between the pile cap body and the pipe pile, effectively reduces the fatigue risk of the connection part, and thus improves the long-term reliability and stability of the pile foundation and photovoltaic support. At the same time, the axial stiffness of the inclined pipe piles is used to resist the horizontal force borne by the top of the pile foundation, which can significantly reduce the load on the pile foundation. This allows for the use of smaller pile foundations under the same load requirements, reduces the amount of material used, and saves the manufacturing cost of the pile foundation. In addition, the simple disassembly of the pile foundation combined with the on-site assembly design saves the transportation cost of the pile foundation and simplifies the installation steps, thereby improving construction efficiency and reducing construction costs.

[0010] According to one embodiment of this application, the pier body includes:

[0011] The upper flange plate forms mounting holes for connecting the photovoltaic bracket, and has multiple first notches, each of which corresponds to one of the multiple mounting sleeves;

[0012] The lower flange plate is separated from the upper flange plate and has a plurality of second notches. The plurality of second notches correspond one-to-one with the plurality of mounting sleeves. The mounting sleeves are installed through the first notch and the second notch.

[0013] The web plate is connected between the upper flange plate and the lower flange plate.

[0014] According to one embodiment of this application, the vertical orthographic projection of the mounting sleeve and the vertical orthographic projection of the mounting hole do not overlap.

[0015] According to one embodiment of this application, the upper surfaces of the plurality of mounting sleeves are flush with each other and parallel to the upper surface of the upper flange plate.

[0016] According to one embodiment of this application, the pipe pile includes a pile body and anchoring blades disposed on the pile body, the anchoring blades being spirally connected to the outer peripheral wall of the pile body.

[0017] According to one embodiment of this application, the channel is filled with grout.

[0018] According to one embodiment of this application, the pipe pile is provided with a connecting hole for cooperating with a piling device, and a reinforcing structure is provided on the outer periphery of the connecting hole.

[0019] According to one embodiment of this application, the force transmission component includes a plurality of guide plates spaced apart along the circumference of the pipe pile, the plurality of guide plates being connected to the assembly sleeve.

[0020] According to one embodiment of this application, the force transmission component further includes:

[0021] The support plate is sleeved on the outside of the pipe pile and is connected to the equipment sleeve, the pipe pile and the multiple guide plates, and is located at the bottom of the channel.

[0022] According to one embodiment of this application, the force transmission component includes:

[0023] A threaded sleeve includes multiple spliced ​​annular segments, each of the annular segments having a threaded portion, and the pipe pile having an external thread for engaging with the threaded portion;

[0024] A first nut is installed on the outer wall of each of the annular petals;

[0025] The second nut is installed on the sleeve of the assembly, and the second nut is adapted to be disposed opposite to the first nut.

[0026] The first screw has its two ends threadedly connected to the first nut and the second nut, respectively.

[0027] According to one embodiment of this application, the force transmission component includes:

[0028] The adapter ring is fitted over the pipe pile;

[0029] The third nut is installed on the outer wall of the adapter ring;

[0030] The fourth nut is provided on the sleeve of the assembly, and the fourth nut is adapted to be disposed opposite to the third nut.

[0031] The second screw has its two ends threadedly connected to the third nut and the fourth nut, respectively.

[0032] According to one embodiment of this application, the adapter ring is pivotally fitted onto the outside of the pipe pile, and the outer peripheral wall of the pipe pile forms a plurality of spaced-apart limiting protrusions, with the adapter ring installed between two adjacent limiting protrusions.

[0033] According to one embodiment of this application, the force transmission component includes:

[0034] The clamping ring is fitted over the pipe pile and includes multiple detachably connected sub-plates;

[0035] The fifth nut is installed on the outer wall of each of the sub-plates;

[0036] The sixth nut is provided on the sleeve of the assembly, and is adapted to be disposed opposite to the fifth nut.

[0037] The third screw has its two ends threadedly connected to the fifth nut and the sixth nut, respectively.

[0038] Secondly, this application provides a photovoltaic system, comprising:

[0039] Pile foundation as described in any of the above schemes;

[0040] The photovoltaic support frame is installed on the pile foundation.

[0041] According to the photovoltaic system of this application, the aforementioned pile foundation design solves the problems of loosening, displacement, or damage that easily occur when traditional inclined piles are directly connected to the pile cap body. It increases the connection strength between the pile cap body and the pipe pile, effectively reducing the fatigue risk of the connection parts, thereby improving the long-term reliability and stability of the pile foundation and photovoltaic support. At the same time, the axial stiffness of the inclined pipe pile is used to resist the horizontal force borne by the top of the pile foundation, which can significantly reduce the load on the pile foundation. This allows for the use of smaller pile foundations under the same load requirements, reducing material usage and thus saving on the manufacturing cost of the pile foundation. In addition, the use of easy-to-disassemble pile foundation components combined with on-site assembly design saves on the transportation cost of the pile foundation and simplifies the installation steps, thereby improving construction efficiency and reducing construction costs.

[0042] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0043] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0044] Figure 1 This is a structural schematic diagram of the pile foundation and photovoltaic support provided in the embodiments of this application;

[0045] Figure 2 This is one of the structural schematic diagrams of the pile foundation provided in the embodiments of this application;

[0046] Figure 3 This is a schematic diagram of the structure of the support assembly provided in the embodiments of this application;

[0047] Figure 4 This is a structural schematic diagram of the pipe pile and force transmission component provided in the embodiments of this application;

[0048] Figure 5 This is the second schematic diagram of the pile foundation provided in the embodiments of this application;

[0049] Figure 6 This is one of the assembly diagrams of the assembly sleeve, force transmission component and pipe pile provided in the embodiments of this application;

[0050] Figure 7 This is a schematic diagram of the structure of the support assembly and the second nut provided in the embodiments of this application;

[0051] Figure 8 This is one of the structural schematic diagrams of the pipe pile provided in the embodiments of this application;

[0052] Figure 9 This is a schematic diagram of the annular segment of the threaded sleeve provided in the embodiments of this application;

[0053] Figure 10 This is a schematic diagram of the structure of the annular petal and the first nut provided in the embodiments of this application;

[0054] Figure 11 This is the third schematic diagram of the pile foundation provided in the embodiments of this application;

[0055] Figure 12 This is the second assembly diagram of the assembly sleeve, force transmission component and pipe pile provided in the embodiments of this application;

[0056] Figure 13 This is a schematic diagram of the structure of the support assembly and the fourth nut provided in the embodiments of this application;

[0057] Figure 14 This is the second structural schematic diagram of the pipe pile provided in the embodiments of this application;

[0058] Figure 15 This is a schematic diagram of the structure of the adapter ring provided in the embodiments of this application;

[0059] Figure 16 This is the fourth schematic diagram of the pile foundation provided in the embodiments of this application;

[0060] Figure 17 This is the third assembly diagram of the assembly sleeve, force transmission component and pipe pile provided in the embodiments of this application;

[0061] Figure 18 This is a schematic diagram of the structure of the support assembly and the sixth nut provided in the embodiments of this application;

[0062] Figure 19 This is the third structural schematic diagram of the pipe pile provided in the embodiments of this application;

[0063] Figure 20 This is a schematic diagram of the sub-plate and the fifth nut provided in the embodiment of this application.

[0064] Figure label:

[0065] Pile foundation 1;

[0066] Foundation assembly 10, foundation body 11, upper flange plate 111, mounting hole 1111, lower flange plate 112, web plate 113, mounting sleeve 12, channel 121.

[0067] Pipe pile 20, pile body 21, connecting hole 211, reinforcing structure 212, external thread 213, limiting boss 214, anchoring blade 22;

[0068] Force transmission component 30;

[0069] Guide plate 311, support plate 312;

[0070] Screw sleeve 321, ring 3211, threaded part 32111, first nut 322, second nut 323, first screw 324;

[0071] Adapter ring 331, third nut 332, fourth nut 333, second screw 334;

[0072] Clamping ring 341, sub-plate 3411, fifth nut 342, sixth nut 343, third screw 344;

[0073] Photovoltaic support 2. Detailed Implementation

[0074] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0075] This application discloses a pile foundation 1, which is applied to a photovoltaic support 2.

[0076] The following is for reference. Figures 1-20 Describes a pile foundation 1 according to an embodiment of this application.

[0077] In some embodiments, such as Figure 1 , Figure 2 , Figure 5 , Figure 11 and Figure 16 As shown, the pile foundation 1 includes a pile cap assembly 10 and multiple pipe piles 20. The pile cap assembly 10 includes a pile cap body 11 and multiple mounting sleeves 12 disposed on the pile cap body 11. The pile cap body 11 is used to support the photovoltaic bracket 2. The mounting sleeves 12 form a channel 121 inside. The multiple pipe piles 20 correspond one-to-one with the multiple mounting sleeves 12. Each pipe pile 20 partially extends into the corresponding channel 121, and each pipe pile 20 and the corresponding mounting sleeve 12 are inclined. At least two pipe piles 20 have different inclination directions. Each pipe pile 20 has a force transmission member 30 installed on its outer peripheral wall. The force transmission member 30 is connected to the mounting sleeve 12.

[0078] "Multiple" here means two or more.

[0079] For example, such as Figure 1 , Figure 2 , Figure 5 , Figure 11 and Figure 16 As shown, there are four sets of equipment sleeves 12 and four sets of pipe piles 20, with each set of four equipment sleeves 12 and four sets of pipe piles 20 corresponding to one another.

[0080] like Figure 1 As shown, the pier body 11 serves as the upper structure of the pile foundation 1, directly supporting the photovoltaic support 2 and distributing the loads transmitted by the photovoltaic support 2 (such as wind loads, snow loads, or seismic loads) to multiple pipe piles 20.

[0081] The support body 11 can be made of concrete, steel or composite materials, and its shape can be flat, frame or other structure adapted to the installation of photovoltaic bracket 2. This application embodiment does not limit this.

[0082] The mounting sleeve 12 can be fixed to the bottom or side of the foundation body 11. Each mounting sleeve 12 can form a columnar channel 121 inside. The diameter of the channel 121 is larger than the outer diameter of the pipe pile 20, so as to achieve unobstructed insertion of the pipe pile 20.

[0083] For example, such as Figure 3 , Figure 7 , Figure 13 and Figure 18 As shown, multiple mounting sleeves 12 are installed on the side of the pier body 11, and the multiple mounting sleeves 12 are spaced apart around the central axis of the pier body 11.

[0084] The shape of the sleeve 12 can be, but is not limited to, cylindrical, prismatic, conical, or frustum-shaped, etc., and this application embodiment does not limit this.

[0085] The mounting sleeve 12 and the foundation body 11 can be connected by integral molding, pre-embedding or welding to form the foundation assembly 10. This application embodiment does not limit this.

[0086] In practice, the pier assembly 10 can be designed as a precast component or cast on-site to meet different construction conditions.

[0087] For example, the foundation component 10 can be a prefabricated component, which eliminates the need for pouring, welding, and assembly on the construction site. It also eliminates the need for extensive excavation of the ground surface and curing during construction. After installation, it can immediately bear the load, thereby significantly accelerating the construction speed, improving the construction accuracy, shortening the project cycle, and thus reducing the construction cost.

[0088] Pipe pile 20 is a long rod-shaped component, which can be made of steel pipe, concrete pipe or composite materials. Its length and diameter can be determined according to the project requirements. This application embodiment does not limit this.

[0089] like Figure 2 , Figure 5 , Figure 11 and Figure 16 As shown, multiple pipe piles 20 can be arranged radially, with each pipe pile 20 corresponding to a mounting sleeve 12. The angle between the axial direction and the vertical direction of the pipe pile 20 is an acute angle, and the angle between the extension direction of the channel 121 of the mounting sleeve 12 and the vertical direction is an acute angle. The upper part of the pipe pile 20 extends into the channel 121 of the mounting sleeve 12, and the extension length can be determined according to the engineering requirements. This application embodiment does not limit this.

[0090] like Figure 2 , Figure 5 , Figure 11 and Figure 16 As shown, the pipe piles 20 and the supporting sleeves 12 are both inclined, with the same or nearly the same inclination angle. However, at least two of the pipe piles 20 have different inclination directions, such as one inclining to the northeast and the other inclining to the northwest, thus forming a multi-directional support system and improving the overturning resistance.

[0091] For example, in some embodiments, the pipe pile 20 may be located in the central region of the channel 121 of the mounting sleeve 12, and the axial direction of the pipe pile 20 may be parallel to the extension direction of the channel 121. In this way, the stress on the mounting sleeve 12 and the pipe pile 20 may be balanced as much as possible, and stress concentration may be reduced.

[0092] The force transmission component 30 is used to connect the pipe pile 20 and the mounting sleeve 12 to effectively transfer the load between the pipe pile 20 and the mounting sleeve 12. The force transmission component 30 includes, but is not limited to, connecting plates, connecting rings, pins, bolt groups or mechanical clamps, etc. Its shape and size can be customized according to the structural characteristics of the pipe pile 20 and the mounting sleeve 12. This application embodiment does not limit this.

[0093] The connection method between the force transmission component 30 and the pipe pile 20 and the mounting sleeve 12 may include, but is not limited to, welding or threaded connection, and the embodiments of this application do not limit this.

[0094] For example, the pipe pile 20 and the force transmission component 30 can be prefabricated components, eliminating the need for pouring, welding, and assembly on the construction site. Moreover, there is no need for large-scale excavation of the ground surface or for curing during construction. After installation, they can immediately bear the load, thereby significantly accelerating the construction speed, improving the construction accuracy, shortening the project cycle, and thus reducing the construction cost.

[0095] In actual implementation, the location and elevation of the steel foundation were marked on-site according to the design drawings, and the foundation assembly 10 was placed on the prepared natural ground. Then, using piling tools, the first pipe pile 20 was driven through the corresponding mounting sleeve 12 to the design elevation. Subsequently, the remaining pipe piles 20 were driven one by one to the design elevation in the same manner. After all the pipe piles 20 were driven, each pipe pile 20 was connected to its corresponding mounting sleeve 12 using a force-transfer member 30, so that the force-transfer member 30 could effectively transfer the load borne by the foundation assembly 10 to the pipe piles 20. Finally, according to the design requirements, the photovoltaic bracket 2 was installed on the foundation body 11. The pile foundation 1 structure of this application can immediately bear the upper load after installation.

[0096] Understandably, on the one hand, by assembling the sleeve 12 and the force transmission component 30 as a transition piece, the load borne by the pile cap body 11 is distributed and transferred to the entire pipe pile 20, reducing point stress and lowering the fatigue risk at the connection points. This allows the pile foundation 1 to provide a more durable and stable support for the photovoltaic support 2 on top, effectively solving the problems of loosening, displacement, or damage that easily occur when traditional inclined piles are directly connected to the pile cap body 11, thereby extending the service life of the pile foundation 1. On the other hand, by utilizing the axial stiffness of the inclined pipe pile 20 to resist horizontal forces, the compressive and tensile strength of the material is fully utilized, reducing bending moment. Compared with traditional vertical piles, this significantly reduces the bending load of the pile foundation 1, allowing for the use of smaller pipe piles 20 and reducing material usage. At the same time, based on the fact that at least two pipe piles 20 have different inclination directions, multiple pipe piles 20 form a spatial support system that can resist loads from any direction. For example, under wind loads, pipe piles 20 with opposite inclination directions pull and compress each other, forming a couple effect that cancels out horizontal forces, reduces the risk of pile cap torsion, and reduces support blind spots. On the other hand, by breaking down a single relatively large pile foundation 1 into multiple smaller components, small lifting equipment can complete the transportation of components and the on-site material handling, thereby saving transportation costs. At the same time, the standardized design of pipe piles 20 and force transmission components 30 simplifies the installation steps, reduces on-site welding or complex adjustment work, improves construction efficiency, and reduces construction costs.

[0097] It should be noted that the pile foundation 1 described in this application embodiment can be applied to various photovoltaic supports 2 such as fixed supports, tracking supports and flexible supports. It can be customized according to different stresses and flexibly assembled on site. In actual application, it is only necessary to match the corresponding number and appropriate specifications of pipe piles 20 according to the mechanical calculation results, thereby improving the universality of the pile foundation 1.

[0098] The pile foundation 1 provided in this application embodiment, through the structural design of the inclined pipe piles 20 installed on the pile cap body 11 by the fitting sleeve 12 and force transmission component 30, solves the problems of loosening, displacement or damage that are easy to occur when the traditional inclined piles are directly connected to the pile cap body 11. It increases the connection strength between the pile cap body 11 and the pipe piles 20, effectively reduces the fatigue risk of the connection parts, and thus improves the long-term reliability and stability of the pile foundation 1 and the photovoltaic support 2. At the same time, the axial stiffness of the inclined pipe piles 20 is used to resist the horizontal force borne by the top of the pile foundation 1, which can significantly reduce the load on the pile foundation 1. This allows for the use of smaller specifications of the pile foundation 1 under the same load requirements, reduces the amount of material used, and saves the manufacturing cost of the pile foundation 1. In addition, the simple disassembly of the pile foundation 1 combined with the on-site assembly design saves the transportation cost of the pile foundation 1 and simplifies the installation steps, thereby improving construction efficiency and reducing construction costs.

[0099] In some embodiments, such as Figure 3 , Figure 7 , Figure 13 and Figure 18 As shown, the pier body 11 includes: an upper flange plate 111, a lower flange plate 112, and a web plate 113.

[0100] The upper flange plate 111 forms mounting holes 1111 for connecting the photovoltaic bracket 2. The upper flange plate 111 has multiple first notches, each corresponding to a multiple mounting sleeve 12. The lower flange plate 112 is separated from the upper flange plate 111. The lower flange plate 112 has multiple second notches, each corresponding to a multiple mounting sleeve 12. The mounting sleeve 12 is installed through the first and second notches. The web plate 113 connects the upper flange plate 111 and the lower flange plate 112.

[0101] "Multiple" here means two or more.

[0102] For example, such as Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 11 , Figure 13 , Figure 16 and Figure 18 As shown, four sets of mounting sleeves 12 and four sets of pipe piles 20 are provided, with each set of four mounting sleeves 12 corresponding to one set of four pipe piles 20. Correspondingly, the upper flange plate 111 has four first notches, each of which corresponds to one set of four mounting sleeves 12; the lower flange plate 112 has four second notches, each of which corresponds to one set of four mounting sleeves 12.

[0103] The upper flange plate 111 is used to directly bear the load transmitted from the photovoltaic bracket 2. The mounting holes 1111 on the upper flange plate 111 can be used to fix the photovoltaic bracket 2 by bolts, welding or pins. The number, size and layout of the mounting holes 1111 can be designed and adjusted according to the base of the photovoltaic bracket 2. This application embodiment does not limit this.

[0104] The shape of the first notch can be, but is not limited to, circular, square, or U-shaped, allowing the sleeve 12 to pass through or be embedded. This application embodiment does not limit this.

[0105] As an example, reinforcing ribs or flanges can be provided at the edges of the first notch to improve local stiffness.

[0106] The lower flange plate 112 is parallel to and separated from the upper flange plate 111. The lower flange plate 112 forms the bottom support surface of the foundation body 11 and is suitable for contact with the foundation or cushion layer.

[0107] The shape of the second notch can be, but is not limited to, circular, square, or U-shaped, allowing the sleeve 12 to pass through or be embedded. This application embodiment does not limit this.

[0108] As an example, the edge of the second notch can be fitted with reinforcing ribs or flanges to improve local stiffness.

[0109] The web plate 113 is used to fix the upper flange plate 111 and the lower flange plate 112 to prevent relative misalignment between the upper flange plate 111 and the lower flange plate 112, and to improve the overall bending stiffness of the foundation body 11.

[0110] The web 113 may be constructed in a form including but not limited to a solid plate, a lattice truss, or an array of stiffening ribs. The height of the web 113 (i.e. the spacing between the upper and lower flange plates 112) may be designed according to the actual load size. This application embodiment does not limit this.

[0111] The web plate 113 can be fixed to the upper flange plate 111 and the lower flange plate 112 by welding, bolting or integral molding, and the embodiments of this application do not limit this.

[0112] In this embodiment, such as Figure 3 , Figure 7 , Figure 13 and Figure 18As shown, the upper flange plate 111 and the lower flange plate 112 can be square, and the size of the upper flange plate 111 is smaller than the size of the lower flange plate 112. Specifically, the vertical orthographic projection of the lower flange plate 112 covers the vertical orthographic projection of the upper flange plate 111. The first notch can be a notch at the corner of the upper flange plate 111, and the second notch can be a notch at the corner of the lower flange plate 112. The mounting sleeve 12 is fitted through the first and second notches to form a double-point fixation. The first and second notches of the same mounting sleeve 12 are both located on the inclined path of the mounting sleeve 12. In other words, the first and second notches of the same mounting sleeve 12 are aligned along a preset oblique direction.

[0113] The pile foundation 1 provided in this application embodiment achieves dual-point fixation between the mounting sleeve 12 and the pile cap body 11 by through-installing the mounting sleeve 12 in the first notch of the upper flange plate 111 and the second notch of the lower flange plate 112. This makes the mounting sleeve 12 and the pile cap body 11 tightly connected, enhances the integrity of the entire pile cap assembly 10, effectively resists deformation and damage, and thus improves the reliability and stability of the pile foundation 1.

[0114] In some embodiments, such as Figure 3 , Figure 7 , Figure 13 and Figure 18 As shown, the vertical orthographic projection of the mounting sleeve 12 and the vertical orthographic projection of the mounting hole 1111 do not overlap.

[0115] In other words, the vertical projection range of the mounting sleeve 12 is completely offset from the vertical projection range of the mounting hole 1111, with no overlap. Specifically, the vertical projection range of the mounting sleeve 12 and the vertical projection range of the mounting hole 1111 must maintain a certain distance on the horizontal plane. In this way, the mounting sleeve 12 for connecting the pipe pile 20 and the mounting hole 1111 for connecting the photovoltaic bracket 2 are arranged in separate sections on the foundation body 11 to avoid positional conflicts.

[0116] For example, such as Figure 3 , Figure 7 , Figure 13 and Figure 18 As shown, the mounting hole 1111 can be located in the middle area of ​​the pier body 11, while the first notch and the second notch are distributed in the edge area.

[0117] The pile foundation 1 provided in this application embodiment has a structural design in which the vertical orthographic projection of the mounting sleeve 12 and the vertical orthographic projection of the mounting hole 1111 do not overlap, so that the area where the mounting hole 1111 is located is as clear as possible, and the operating tools and connectors can be operated without obstruction without having to go around the mounting sleeve 12, thereby simplifying the installation process, reducing adjustment time, and thus greatly improving installation efficiency.

[0118] In some embodiments, such as Figure 3 , Figure 7 , Figure 13 and Figure 18 As shown, the upper surfaces of the multiple mounting cylinders 12 are flush, and the upper surfaces of the multiple mounting cylinders 12 are parallel to the upper surface of the upper flange plate 111.

[0119] In fact, the normals to the upper and lower surfaces of the cylindrical mounting sleeve 12 are parallel to the central axis of the mounting sleeve 12. That is, if a cylindrical mounting sleeve 12 is used to install on the bearing body 11, both the upper and lower surfaces of the mounting sleeve 12 are inclined surfaces. Figure 3 , Figure 7 , Figure 13 and Figure 18 As shown, considering the difficulty in positioning multiple mounting cylinders 12 when using this structure due to the need to avoid the installation path of the photovoltaic bracket 2, this application adopts an inclined cylindrical mounting cylinder 12. Specifically, the angle between the normals of the upper and lower surfaces of the inclined mounting cylinder 12 and the central axis of the mounting cylinder 12 is an acute angle. After the inclined cylindrical mounting cylinder 12 is installed on the foundation body 11, the upper and lower surfaces of the mounting cylinder 12 are both horizontal planes and parallel to the horizontal upper surface of the upper flange plate 111. Thus, although the inclination direction and angle of each pipe pile 20 and mounting cylinder 12 may be different, the plane of the upper opening of the mounting cylinder 12 (i.e., the upper surface) is at the same horizontal plane after construction, and the plane of the lower opening of the mounting cylinder 12 (i.e., the lower surface) is at the same horizontal plane after construction.

[0120] The pile foundation 1 provided in this embodiment achieves a level and flush upper surface for all the mounting sleeves 12, through a structural design where the upper surfaces of the multiple mounting sleeves 12 are flush with and parallel to the upper surface of the upper flange plate 111. This provides a clear and unified reference plane for on-site construction. When positioning the pipe piles 20, controlling their elevation, and installing the force transmission components 30, construction personnel can directly use this horizontal plane as a reference, eliminating the need for complex individual calculations and leveling for each pipe pile 20 with a different inclination angle. This simplifies the construction process, reduces human error, and significantly improves installation speed and overall structural accuracy. Simultaneously, while maintaining the uninterrupted installation hole area 1111, the functionality of the top surface of the pile cap assembly 10 is further preserved, facilitating equipment placement and the installation of other possible auxiliary components, thus enhancing the overall project's convenience.

[0121] In some embodiments, such as Figure 4 , Figure 8 , Figure 14 and Figure 19As shown, the pipe pile 20 includes a pile body 21 and an anchoring blade 22 disposed on the pile body 21. The anchoring blade 22 is spirally connected to the outer peripheral wall of the pile body 21.

[0122] The anchoring blade 22 can be connected to the pile body 21 by welding, bolting or other means, or the anchoring blade 22 can be integrally formed with the pile body 21, such as by casting, rolling or centrifugal casting. This application embodiment does not limit this.

[0123] One or more anchoring blades 22 may be provided on the outer peripheral wall of the pile body 21. The multiple anchoring blades 22 may be distributed at intervals along the axial direction of the pile body 21, where multiple means two or more.

[0124] For example, in some embodiments, such as Figure 4 , Figure 8 , Figure 14 and Figure 19 As shown, two anchoring blades 22 can be installed on the outer peripheral wall of the pile body 21.

[0125] In this embodiment, such as Figure 4 , Figure 8 , Figure 14 and Figure 19 As shown, the pile body 21 can be a generally hollow cylindrical tubular component. The head of the pile body 21 can extend into the channel 121 of the sleeve 12, and the head of the pile body 21 can be selectively connected to a flange plate. The tail of the pile body 21 can be designed to be pointed, thus facilitating pile driving. The anchoring blade 22 is an additional structure connected to the outer peripheral wall of the pile body 21, used to increase the mechanical interlocking and interaction area between the pile body 21 and the surrounding soil, thereby improving the tensile bearing capacity, compressive bearing capacity and horizontal load resistance of the pipe pile 20. The anchoring blade 22 can be installed starting from the area near the tail of the pile body 21 and extending upwards to a certain length.

[0126] The pile foundation 1 provided in this application embodiment, through the structural design of the aforementioned anchoring blades 22 being spirally connected to the outer peripheral wall of the pile body 21, increases the surface area of ​​the pipe pile 20, resulting in a strong mechanical interlocking effect between the inclined pipe pile 20 and the soil, greatly improving the pull-out bearing capacity of the inclined pipe pile 20, thereby improving the anchoring capacity of the inclined pipe pile 20. At the same time, the spiral surface of the anchoring blades 22 effectively diffuses the load into a deeper and wider soil, reducing stress concentration at the pile end, thereby improving the overall bearing capacity of the pile foundation 1 and reducing settlement. In addition, during the pile driving process, the spiral anchoring blades 22 can continuously cut and squeeze the soil, guiding the pile body 21 to sink smoothly along the designed path, thereby effectively reducing the risk of pile body 21 deviation.

[0127] In some embodiments, such as Figure 2, Figure 5 , Figure 11 and Figure 16 As shown, channel 121 is filled with grout.

[0128] The grouting material may include, but is not limited to, fine aggregate concrete, high fluidity concrete or micro-expansion concrete, etc., and the embodiments of this application do not limit it.

[0129] In fact, after the grout solidifies within the channel 121, it forms a high-strength solid that bonds the pipe pile 20 and the mounting sleeve 12 into a whole, filling the gap between them. On one hand, the solidified grout isolates the inner wall of the mounting sleeve 12 from moisture, impurities, and pollutants in the external environment, reducing their corrosive effects. On the other hand, it transforms the original point or line contact between the pipe pile 20 and the mounting sleeve 12 into a more comprehensive surface contact, greatly increasing the contact area. The solidified grout and the force transmission component 30 can work together. The force transmission component 30 undertakes the main mechanical locking and initial positioning functions, while the grout provides uniform lateral constraint and stress distribution. The upper load borne by the pile cap assembly 10 can be more effectively transferred to the pipe pile 20 through the force transmission component and the solidified grout.

[0130] The pile foundation 1 provided in this application embodiment is filled with grout through the channel 121 of the aforementioned mounting sleeve 12. The cured grout isolates the pipe pile 20 and the mounting sleeve 12 from moisture, impurities, and pollutants in the external environment, forming a strong physical barrier between them. This effectively alleviates electrochemical corrosion of the contact surface, greatly extends the service life of key connection parts, and reduces subsequent maintenance costs. At the same time, the load can be evenly transferred to the pipe pile 20 through the mounting sleeve 12 via the cured high-rigidity grout, reducing fretting, impact, and stress concentration that may occur due to gaps. This helps resist repeated fatigue stress, thereby optimizing the force transmission path and greatly enhancing the connection rigidity and integrity between the mounting sleeve 12 and the pipe pile 20.

[0131] In some embodiments, such as Figure 4 , Figure 8 , Figure 14 and Figure 19 As shown, the pipe pile 20 is provided with a connection hole 211 for cooperating with the piling equipment, and a reinforcing structure 212 is provided on the outer periphery of the connection hole 211.

[0132] It should be noted that, as Figure 4 , Figure 8 , Figure 14 and Figure 19As shown, the connecting hole 211 is a through hole or blind hole machined on the pile body 21 of the pipe pile 20. The main function of the connecting hole 211 is to serve as a force application point for the piling equipment. By inserting the clamps or pins of the piling equipment into the connecting hole 211, the huge driving force, pulling force, or impact force can be effectively transmitted to the pile body 21. The connecting hole 211 can be set near the head of the pipe pile 20 to facilitate the operation of the piling equipment. For long piles, an auxiliary connecting hole 211 can be added in the middle of the pile body 21.

[0133] Due to the presence of the connecting hole 211, local section weakening and stress concentration are unavoidable on the pile body 21. During pile driving, under huge construction loads, the outer periphery of the connecting hole 211 is prone to plastic deformation or tearing, and even the head of the entire pile body 21 may be damaged. Therefore, a reinforcing structure 212 is added to the outer periphery of the connecting hole 211. This reinforcing structure 212 compensates for the aforementioned structural weakening, evenly distributes the stress in the hole opening area to a larger area, and alleviates local failure.

[0134] The reinforcing structure 212 can be at least one of the following structural forms:

[0135] Firstly, overall thickening and reinforcement;

[0136] In this embodiment, during the manufacturing of the pipe pile 20, the pipe wall in the area where the connecting hole 211 is located is locally thickened, and then a hole is drilled in the center of the thickened area to form the connecting hole 211. Thus, the thickened portion at the edge of the connecting hole 211 forms a reinforcing structure 212.

[0137] Secondly, additional reinforcing plates were welded on.

[0138] In this embodiment, the reinforcing plate is precisely aligned and attached to the outer periphery of the connecting hole 211 on the pipe pile 20, and the reinforcing plate is welded to the outer wall of the pipe pile 20.

[0139] Third, reinforced with stiffening ribs;

[0140] In this embodiment, a plurality of radially arranged stiffening ribs are welded along the outer periphery of the connecting hole 211.

[0141] The pile foundation 1 provided in this application embodiment, by setting a reinforcing structure 212 on the outer periphery of the connecting hole 211 for cooperating with the pile driving equipment, significantly strengthens the stress-weak area formed by the pipe pile 20 due to matching the pile driving equipment, disperses the concentrated load to a larger area of ​​the pipe pile 20, alleviates the local stress concentration phenomenon on the outer periphery of the connecting hole 211, reduces the probability of local stress exceeding the yield strength of the material, thereby significantly reducing the risk of crushing or tearing of the head of the pile body 21, and effectively protects the integrity and stability of the pile body during construction.

[0142] The embodiments of this application will be described in detail below from four different implementation perspectives.

[0143] I. In some embodiments, such as Figures 2-4 As shown, the force transmission component 30 includes a plurality of guide plates 311 arranged circumferentially along the pipe pile 20, and the plurality of guide plates 311 are connected to the assembly sleeve 12.

[0144] "Multiple" here means two or more.

[0145] For example, in some embodiments, such as Figure 4 As shown, the force transmission component 30 includes three guide plates 311 arranged circumferentially along the pipe pile 20.

[0146] The connection between the guide plate 311 and the mounting sleeve 12 includes, but is not limited to, welding, threaded connection or riveting, etc., and the embodiments of this application do not limit this.

[0147] As an example, such as Figure 4 As shown, the corners of the guide plate 311 can be chamfered. The chamfered structure can include R-angle or C-angle, etc., to reduce the interference between the force transmission component 30 and the inner wall of the mounting sleeve 12 during the pile driving process.

[0148] In actual implementation, such as Figure 2 As shown, the construction sequence of pile foundation 1 can be as follows: First, according to the design drawings, mark the points on site and confirm the placement orientation and elevation of the pile cap assembly 10, and place the pile cap assembly 10 on the prepared natural ground. Then, carry out the pile driving operation one by one for each pipe pile 20, and finish the pile driving when the pile top elevation reaches the design requirements. Next, weld on site to complete the reliable connection between the guide plate 311 and the mounting sleeve 12. Finally, grout can be filled into the channel 121 to prevent rainwater accumulation on the inner wall of the mounting sleeve 12 and to prevent corrosion.

[0149] It should be noted that, as Figure 4 As shown, multiple guide plates 311 can be manufactured as an integral part of the pipe pile 20 during the production stage, without the need for on-site welding and installation. On-site, only the welding of multiple guide plates 311 and the mounting sleeve 12 needs to be completed.

[0150] The pile foundation 1 provided in this application embodiment, through the structural design of the force transmission component 30 including multiple guide plates 311 directly connected to the mounting sleeve 12, disperses the concentrated force into multiple local forces through the spaced guide plates 311, and effectively diffuses the load to the pipe pile 20 and the mounting sleeve 12 through the plate structure, thereby significantly reducing the peak stress in the connection area, greatly improving the fatigue resistance of the connection node, and thus extending the service life of the pile foundation 1. In addition, the multiple guide plates 311 can also quickly guide the pipe pile 20 to be accurately positioned, effectively reducing the difficulty and time of adjustment. At the same time, the gap between two adjacent guide plates 311 provides space for construction operations, facilitating welding or grouting operations, thereby improving construction efficiency.

[0151] In some embodiments, such as Figures 2-4 As shown, the force transmission component 30 also includes a support plate 312.

[0152] The support plate 312 is sleeved outside the pipe pile 20. The support plate 312 is connected to the mounting sleeve 12, the pipe pile 20 and multiple guide plates 311, and the support plate 312 is located at the bottom of the channel 121.

[0153] The support plate 312 can be a ring-shaped structure that is sleeved on the pipe pile 20 and matched with the mounting sleeve 12. Specifically, it can be including but not limited to circular ring, square ring or polygonal ring, etc. The embodiments of this application do not limit this.

[0154] The connection method between the support plate 312 and the mounting sleeve 12 may include, but is not limited to, welding, threaded connection or riveting, etc., and the embodiments of this application do not limit this.

[0155] The connection method between the support plate 312 and the multiple guide plates 311 may include, but is not limited to, integral molding, welding or threaded connection, etc., and the embodiments of this application do not limit this.

[0156] In actual implementation, such as Figure 2 As shown, the construction sequence of pile foundation 1 can be as follows: First, according to the design drawings, mark the points on site and confirm the placement orientation and elevation of the pile cap assembly 10, and place the pile cap assembly 10 on the prepared natural ground. Then, carry out the pile driving operation one by one for each pipe pile 20, and finish the pile driving when the pile top elevation reaches the design requirements. Next, weld on site to complete the reliable connection between the guide plate 311 and the support plate 312 and the mounting sleeve 12. At this time, the support plate 312 can seal the bottom opening of the channel 121. Then, grout can be filled into the channel 121 whose bottom opening is sealed by the support plate 312 to achieve the purpose of preventing rainwater accumulation on the inner wall of the mounting sleeve 12 and preventing corrosion.

[0157] It should be noted that, as Figure 4As shown, the support plate 312 and multiple guide plates 311 can be manufactured as an integral part of the pipe pile 20 during the production stage, without the need for on-site welding and installation. On-site, only the welding of the support plate 312 and multiple guide plates 311 to the mounting sleeve 12 needs to be completed.

[0158] The pile foundation 1 provided in this application embodiment, through the setting of the aforementioned support plate 312, on the one hand, forms the bottom support of multiple guide plates 311, thereby reducing stress concentration at the bottom of the guide plates 311 and significantly enhancing the rigidity and stability of the force transmission component 30; on the other hand, the support plate 312 further increases the connection strength between the pipe pile 20 and the mounting sleeve 12, further improving the integrity and reliability of the pile foundation 1; and on yet another aspect, the support plate 312 forms a baffle that seals the bottom opening of the channel 121, preventing the grout from leaking out in large quantities from the bottom, which helps to improve the density of the grout after curing, thereby fully utilizing the bonding and force transmission efficiency of the grout.

[0159] II. In some embodiments, such as Figure 5 and Figure 6 As shown, the force transmission component 30 includes: a threaded sleeve 321, a first nut 322, a second nut 323, and a first screw 324.

[0160] like Figures 5-10 As shown, the threaded sleeve 321 includes multiple spliced ​​annular segments 3211, each annular segment 3211 having a threaded portion 32111, and the pipe pile 20 having an external thread 213 for engaging with the threaded portion 32111; a first nut 322 is installed on the outer wall of each annular segment 3211; a second nut 323 suitable for being arranged opposite to the first nut 322 is installed on the sleeve 12; the two ends of the first screw 324 are threadedly connected to the first nut 322 and the second nut 323 respectively.

[0161] In other words, the threaded sleeve 321 is not a complete ring, but is composed of multiple rings 3211 spliced ​​together end to end. There may be a small gap between two adjacent rings 3211. The inner surface of each ring 3211 is machined with a threaded part 32111, which is a threaded protrusion. The outer peripheral wall of the corresponding section of the pipe pile 20 is pre-made with external threads 213.

[0162] The segmented design allows each annular segment 3211 to be directly attached to the outer wall of the pipe pile 20 radially, without needing to be screwed in from the end of the pipe pile 20, greatly facilitating on-site installation. After multiple annular segments 3211 are wrapped around the pipe pile 20 and assembled, multiple threaded portions 32111 on the inner side of the multiple annular segments 32111 engage with the external threads 213 of the pipe pile 20.

[0163] The connection between the first nut 322 and the ring 3211 can be made in a manner including but not limited to integral molding or welding, and this application embodiment does not limit this.

[0164] The connection between the second nut 323 and the mounting sleeve 12 can be made in a manner including but not limited to integral molding or welding, and this application embodiment does not limit this.

[0165] Multiple annular petals 3211 can be connected to the mounting sleeve 12 via multiple first screws 324. Specifically, one or more first nuts 322 can be installed on the outer wall of each annular petal 3211, that is, each annular petal 3211 can be connected to one or more first screws 324, where "multiple" means two or more.

[0166] For example, such as Figure 6 As shown, the screw sleeve 321 includes two spliced ​​annular segments 3211. Two first nuts 322 are installed on the outer wall of each annular segment 3211. Then, the mounting sleeve 12 is equipped with four second nuts 323. The two first nuts 322 on each annular segment 3211 are respectively connected to the two corresponding second nuts 323 on the mounting sleeve 12 through two first screws 324.

[0167] In actual implementation, such as Figure 5 and Figure 6 As shown, the construction sequence of the pile foundation 1 can be as follows: First, according to the design drawings, mark the points on site and confirm the placement orientation and elevation of the pile cap assembly 10, and place the pile cap assembly 10 on the prepared natural ground. Then, carry out the pile driving operation one by one for each pipe pile 20, and finish the pile driving when the pile top elevation reaches the design requirements. Next, attach the multiple annular petals 3211 of the threaded sleeve 321 to the pipe pile 20, so that the threaded part 32111 of the multiple annular petals 3211 is fitted and matched with the external thread 213 on the top of the pipe pile 20 and engages with each other. Next, the first screw 324 is inserted from the outside to the inside, first engaging with the second nut 323 on the mounting sleeve 12. After screwing in, it continues to engage with the first nut 322 on the corresponding ring 3211. The first nuts 322 on the remaining ring 3211 and the second nuts 323 on the mounting sleeve 12 are all connected by the corresponding first screw 324. The construction operation is carried out according to the aforementioned steps until all ring 3211 are securely connected to the corresponding second nuts 323 on the mounting sleeve 12 by the corresponding first screw 324. This ensures that all first screws 324 press against the threaded sleeve 321 to increase friction and achieve efficient transmission of the internal force of the upper photovoltaic support 2 to the lower pipe pile 20. Finally, grouting material can be filled into the channel 121 to prevent rainwater accumulation on the inner wall of the mounting sleeve 12 and to prevent corrosion.

[0168] The pile foundation 1 provided in this embodiment, through the aforementioned threaded sleeve 321, first nut 322, second nut 323, and first screw 324, allows the first screw 324 to apply active pre-tightening pressure between the pipe pile 20 and the mounting sleeve 12. The frictional force generated by the active pre-tightening pressure, combined with the mechanical engagement force of the thread, improves the stiffness and strength of the connection node of the force transmission component 30, effectively resisting upward pull-out force, pressure, and bending moment, thereby significantly improving the efficiency of downward transmission of upper loads and strengthening the overall bearing capacity of the pile foundation 1. Furthermore, the first nut 322, second nut 323, and first screw 324 can be designed in a standardized manner, facilitating mass production and spare parts inventory, thereby reducing procurement and maintenance costs, and ultimately lowering the total life-cycle cost of the pile foundation 1.

[0169] III. In some embodiments, such as Figure 11 and Figure 12 As shown, the force transmission component 30 includes: a transition ring 331, a third nut 332, a fourth nut 333, and a second screw 334.

[0170] like Figures 11-15 As shown, the adapter ring 331 is sleeved outside the pipe pile 20; a third nut 332 is installed on the outer wall of the adapter ring 331; a fourth nut 333 suitable for being arranged opposite to the third nut 332 is installed on the sleeve 12; the two ends of the second screw 334 are threadedly connected to the third nut 332 and the fourth nut 333 respectively.

[0171] The connection method between the adapter ring 331 and the pipe pile 20 may include, but is not limited to, embedded installation, threaded connection or welding, etc., and the embodiments of this application do not limit this.

[0172] The connection method between the third nut 332 and the adapter ring 331 may include, but is not limited to, integral molding or welding, and the embodiments of this application do not limit this.

[0173] The connection between the fourth nut 333 and the mounting sleeve 12 can be made in a manner including but not limited to integral molding or welding, and this application embodiment does not limit this.

[0174] The third nut 332 and the fourth nut 333 can be set one or more in a one-to-one correspondence, where multiple means two or more.

[0175] For example, such as Figure 12 , Figure 13 and Figure 15 As shown, four third nuts 332 are installed at intervals on the outer wall of the adapter ring 331, and four fourth nuts 333 are installed on the mounting sleeve 12, which are suitable for being arranged one-to-one with the four third nuts 332. The four third nuts 332 are respectively connected to the four fourth nuts 333 through four second screws 334.

[0176] In actual implementation, such as Figure 11 and Figure 12 As shown, the construction sequence of pile foundation 1 can be as follows: First, according to the design drawings, mark the points on site and confirm the placement orientation and elevation of the pile cap assembly 10, and place the pile cap assembly 10 on the prepared natural ground. Then, carry out the pile driving operation one by one for each pipe pile 20, and finish the pile driving when the pile top elevation reaches the design requirements. Next, use the second screw 334 to insert from the outside to the inside, first screwing it into the fourth nut 333 on the mounting sleeve 12, and then continuing to screw it inward, finally screwing the second screw 334 into the third nut 332 on the transition ring 331. By tightening the second screw 334, a tension force is generated between the transition ring 331 and the mounting sleeve 12, thereby rigidly connecting the pipe pile 20 to the pile cap assembly 10. Finally, grouting material can be filled into the channel 121 to prevent rainwater accumulation on the inner wall of the mounting sleeve 12 and to prevent corrosion.

[0177] It should be noted that the adapter ring 331 can be manufactured as an integral component with the pipe pile 20 during the production stage, or it can be assembled with the pipe pile 20 on site. This application embodiment does not limit this.

[0178] The pile foundation 1 provided in this embodiment, through the aforementioned adapter ring 331, third nut 332, fourth nut 333, and second screw 334, allows the upper load to be transferred from the pile cap body 11 to the mounting sleeve 12, then to the second screw 334 via the fourth nut 333, and finally to the adapter ring 331 via the third nut 332. The load is ultimately transferred to the pipe pile 20 by the adapter ring 331 with a ring-shaped constraint force. This transfer method ensures that the pipe pile 20 primarily bears axial force rather than bending moment, effectively reducing stress concentration at the connection points, minimizing the risk of loosening and breakage, and improving the overall reliability and stability of the pile foundation 1. Furthermore, the third nut 332, fourth nut 333, and second screw 334 can be designed in a standardized manner, facilitating mass production and spare parts inventory, thereby reducing procurement and maintenance costs, and ultimately lowering the total life-cycle cost of the pile foundation 1.

[0179] In some embodiments, such as Figure 14 and Figure 15 As shown, the adapter ring 331 is pivotally fitted onto the outside of the pipe pile 20. The outer peripheral wall of the pipe pile 20 forms a plurality of spaced-apart limiting protrusions 214, and the adapter ring 331 is installed between two adjacent limiting protrusions 214.

[0180] "Multiple" here means two or more.

[0181] For example, such as Figure 14 As shown, the outer peripheral wall of the pipe pile 20 forms two spaced-apart limiting protrusions 214.

[0182] In actual implementation, such as Figure 14 and Figure 15 As shown, during the manufacturing process, the lower limiting boss 214 of two adjacent limiting bosses 214 is first machined on the pipe pile 20. Then, the adapter ring 331 is fitted onto the pipe pile 20 from the head. The adapter ring 331 slides along the axial direction of the pipe pile 20 until it abuts against the lower limiting boss 214. Subsequently, the upper limiting boss 214 of two adjacent limiting bosses 214 is machined on the pipe pile 20, forming an annular limiting groove between the two adjacent limiting bosses 214. The adapter ring 331 is then embedded in this limiting groove. In this way, the adapter ring 331 and the limiting boss 214 are matched and limited along the axial direction. The pipe pile 20 with the limiting boss 214 and the adapter ring 331 are integral components during manufacturing. Because the adapter ring 331 can pivot freely relative to the pipe pile 20, the relative positions of the third nut 332 on the adapter ring 331 and the fourth nut 333 on the mounting sleeve 12 are adjustable. After pile driving is completed, the third nut 332 on the adapter ring 331 and the fourth nut 333 on the mounting sleeve 12 are often not fully aligned. Since the spatial position of the fourth nut 333 on the mounting sleeve 12 is fixed, if the spatial position of the third nut 332 on the adapter ring 331 is also fixed, the requirements for construction accuracy are extremely high. Therefore, the adapter ring 331 in this embodiment is designed to rotate freely 360° around the axis of the pipe pile 20 when the axial displacement is restricted, thereby freely adjusting the spatial position of the third nut 332 on the adapter ring 331 so that the third nut 332 and the fourth nut 333 are fully aligned, thus enabling the second screw 334 to be successfully assembled. The upper load is transferred to the pile cap assembly 10, and then to the transition ring 331 by the second screw 334. The load is then transferred to the pipe pile 20 by the compressive force between the transition ring 331 and the limiting boss 214.

[0183] The pile foundation 1 provided in this application embodiment restricts the axial displacement of the transition ring 331 through the aforementioned limiting boss 214. Combined with the pivotable design of the transition ring 331, construction personnel do not need to spend a lot of time repeatedly adjusting the rotation angle of the pipe pile 20 to align the nuts. They can easily align the third nut 332 and the fourth nut 333 by simply rotating the transition ring 331. This reduces the stringent requirements for the construction accuracy of the pile driving operation, reduces construction stagnation or rework caused by misalignment, and thus greatly improves construction efficiency. At the same time, the load is transferred to the entire pipe pile 20 through the compressive force of the transition ring 331 and the limiting boss 214, increasing the connection stiffness between the transition ring 331 and the pipe pile 20. This not only makes the load transfer more direct and efficient, but also reduces the risk of slippage, thereby improving the long-term reliability and stability of the pile foundation 1. In addition, the pipe pile 20 and the transition ring 331 can be mass-produced in the factory as standard components, which greatly reduces the complexity of on-site operations and facilitates standardized and prefabricated production.

[0184] IV. In some embodiments, such as Figure 16 and Figure 17 As shown, the force transmission component 30 includes: a clamping ring 341, a fifth nut 342, a sixth nut 343, and a third screw 344.

[0185] like Figures 16-20 As shown, the clamping ring 341 is sleeved outside the pipe pile 20, and the clamping ring 341 includes multiple sub-plates 3411 that can be detachably connected; each sub-plate 3411 has a fifth nut 342 installed on its outer wall; the mounting sleeve 12 is equipped with a sixth nut 343 that is suitable for being arranged opposite to the fifth nut 342; the two ends of the third screw 344 are threadedly connected to the fifth nut 342 and the sixth nut 343 respectively.

[0186] The clamping ring 341 can be formed by assembling multiple sub-plates 3411 end to end through detachable connectors. When multiple sub-plates 3411 are assembled and tightened, the clamping ring 341 uses the friction between the inner wall of the sub-plate 3411 and the outer wall of the pipe pile 20 to hold the pipe pile 20, thereby transferring the load.

[0187] The aforementioned split clamp design allows each sub-plate 3411 of the clamp ring 341 to directly wrap around the pre-positioned pipe pile 20 radially, without needing to be inserted from the head of the pipe pile 20, which greatly facilitates on-site installation.

[0188] In this embodiment, such as Figure 20 As shown, each sub-plate 3411 may include a first section for covering the outer wall of the pipe pile 20 and a second section for connecting adjacent sub-plates 3411. Taking the cylindrical pipe pile 20 as an example, the first section is arc-shaped, and the outer wall of the first section is connected to a fifth nut 342. The two ends of the first section are connected to the second section, which is straight to facilitate connection.

[0189] The detachable connection methods between multiple sub-boards 3411 may include, but are not limited to, threaded connection, pin connection or snap-fit, etc., and the embodiments of this application do not limit this.

[0190] The connection method between the fifth nut 342 and the sub-plate 3411 may include, but is not limited to, integral molding or welding, and the embodiments of this application do not limit this.

[0191] The connection between the sixth nut 343 and the mounting sleeve 12 can be made in a manner including but not limited to integral molding or welding, and this application embodiment does not limit this.

[0192] Multiple subplates 3411 can be connected to the mounting sleeve 12 via multiple third screws 344. Specifically, one or more fifth nuts 342 can be installed on the outer wall of each subplate 3411, that is, each subplate 3411 can be connected to one or more third screws 344, where "multiple" means two or more.

[0193] For example, such as Figure 17 , Figure 18 and Figure 20 As shown, the clamp ring 341 includes two detachably connected sub-plates 3411. Two fifth nuts 342 are installed on the outer wall of each sub-plate 3411. The mounting sleeve 12 is equipped with four sixth nuts 343. The two fifth nuts 342 on each sub-plate 3411 are connected to the corresponding two sixth nuts 343 on the mounting sleeve 12 through two third screws 344.

[0194] In actual implementation, such as Figure 16 and Figure 17 As shown, the construction sequence of pile foundation 1 can be as follows: First, according to the design drawings, mark the points on site and confirm the placement orientation and elevation of the pile cap assembly 10, and place the pile cap assembly 10 on the prepared natural ground. Then, carry out the pile driving operation one by one for each pipe pile 20, and finish the pile driving when the pile top elevation reaches the design requirements. Next, match multiple sub-plates 3411 to the target area of ​​the head of the pipe pile 20, and use detachable connectors to fasten the multiple sub-plates 3411 to form a clamping ring 341. Then, use a third screw 344 to insert from the outside to the inside, first screwing it into the sixth nut 343 on the mounting sleeve 12, and continuing to screw it inward, finally screwing the third screw 344 into the fifth nut 342 on the clamping ring 341. By tightening the third screw 344, a tension force is generated between the clamping ring 341 and the mounting sleeve 12, thereby rigidly connecting the pipe pile 20 and the pile cap assembly 10. Finally, if it is necessary to further strengthen the interaction between the pipe pile 20 and the pile cap assembly 10, the gap in the channel 121 of the sleeve 12 can be filled with grout.

[0195] The pile foundation 1 provided in this application embodiment, through the setting of the above-mentioned clamping ring 341, fifth nut 342, sixth nut 343 and third screw 344, can adjust the clamping strength between the sub-plates 3411 to adjust the clamping tightness of the clamping ring 341 on the pipe pile 20, thereby adapting to the small manufacturing error of the outer diameter of the pipe pile 20, and effectively reducing the risk of slippage due to excessive looseness or pressure damage due to excessive tightness of the clamping ring 341. It can also actively apply a huge radial clamping force to maximize the connection stiffness and strength between the clamping ring 341 and the pipe pile 20, thereby improving the stability and reliability of the pile foundation 1. At the same time, the split clamping design allows the force transmission component 30 to be installed after the pipe pile 20 is driven into place at any angle and any elevation, thereby greatly improving the installation convenience of the force transmission component 30 and effectively improving the on-site adaptability of the pile foundation 1. In addition, the third nut 332, the fourth nut 333, and the second screw 334 can adopt a standardized design, which facilitates mass production and spare parts storage, thereby reducing procurement and maintenance costs, and thus reducing the total life cycle cost of the pile foundation 1.

[0196] This application also discloses a photovoltaic system.

[0197] In some embodiments, the photovoltaic system includes: a photovoltaic support 2 and a pile foundation 1 as described in any of the above embodiments.

[0198] Photovoltaic support bracket 2 is installed on pile foundation 1.

[0199] The photovoltaic system provided in this application, through the aforementioned pile foundation 1, solves the problems of loosening, displacement, or damage that easily occur when traditional inclined piles are directly connected to the pile cap body 11. It increases the connection strength between the pile cap body 11 and the pipe pile 20, effectively reducing the fatigue risk of the connection part, thereby improving the long-term reliability and stability of the pile foundation 1 and the photovoltaic support 2. At the same time, by using the axial stiffness of the inclined pipe pile 20 to resist the horizontal force borne by the top of the pile foundation 1, the load on the pile foundation 1 can be significantly reduced, thereby allowing the use of a smaller specification pile foundation 1 under the same load requirements, reducing the amount of material used, and thus saving the manufacturing cost of the pile foundation 1. In addition, by using the easy disassembly of the pile foundation 1 combined with the on-site assembly design, the transportation cost of the pile foundation 1 is saved, and the installation steps are simplified, thereby improving construction efficiency and reducing construction costs.

[0200] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0201] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0202] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0203] In the description of this application, "multiple" means two or more.

[0204] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0205] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0206] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0207] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A pile foundation (1) applied to a photovoltaic support (2), characterized in that, include: The support assembly (10) includes a support body (11) and a plurality of mounting sleeves (12) disposed on the support body (11). The support body (11) is used to support the photovoltaic bracket (2). The mounting sleeves (12) form a channel (121) inside. Multiple pipe piles (20) correspond one-to-one with multiple mounting sleeves (12). Each pipe pile (20) extends partially into the corresponding channel (121), and each pipe pile (20) and the corresponding mounting sleeve (12) are inclined. At least two of the pipe piles (20) have different inclination directions. Each pipe pile (20) has a force transmission member (30) installed on its outer peripheral wall, and the force transmission member (30) is connected to the mounting sleeve (12).

2. The pile foundation (1) according to claim 1, characterized in that, The pier body (11) includes: The upper flange plate (111) forms mounting holes (1111) for connecting the photovoltaic bracket (2), and has a plurality of first notches, the plurality of first notches corresponding one to one with the plurality of mounting sleeves (12); The lower flange plate (112) is separated from the upper flange plate (111) and has a plurality of second notches. The plurality of second notches correspond one-to-one with the plurality of mounting sleeves (12). The mounting sleeves (12) are installed through the first notch and the second notch. The web (113) is connected between the upper flange (111) and the lower flange (112).

3. The pile foundation (1) according to claim 2, characterized in that, The vertical projection of the mounting sleeve (12) and the vertical projection of the mounting hole (1111) have no overlapping area.

4. The pile foundation (1) according to claim 3, characterized in that, The upper surfaces of the plurality of mounting sleeves (12) are flush with each other and parallel to the upper surface of the upper flange plate (111).

5. The pile foundation (1) according to claim 1, characterized in that, The pipe pile (20) includes a pile body (21) and an anchoring blade (22) disposed on the pile body (21). The anchoring blade (22) is spirally connected to the outer peripheral wall of the pile body (21).

6. The pile foundation (1) according to claim 1, characterized in that, The channel (121) is filled with grout.

7. The pile foundation (1) according to claim 1, characterized in that, The pipe pile (20) is provided with a connection hole (211) for cooperating with the piling equipment, and a reinforcing structure (212) is provided on the outer periphery of the connection hole (211).

8. The pile foundation (1) according to any one of claims 1-7, characterized in that, The force transmission component (30) includes a plurality of guide plates (311) arranged circumferentially along the pipe pile (20), and the plurality of guide plates (311) are connected to the assembly sleeve (12).

9. The pile foundation (1) according to claim 8, characterized in that, The force transmission component (30) also includes: The support plate (312) is sleeved on the outside of the pipe pile (20) and is connected to the mounting sleeve (12), the pipe pile (20) and the multiple guide plates (311), and is located at the bottom of the channel (121).

10. The pile foundation (1) according to any one of claims 1-7, characterized in that, The force transmission component (30) includes: The threaded sleeve (321) includes a plurality of spliced ​​annular segments (3211), each of the annular segments (3211) having a threaded portion (32111), and the pipe pile (20) having an external thread (213) for engaging with the threaded portion (32111); First nut (322), each of the annular petals (3211) is equipped with a first nut (322) on its outer wall; The second nut (323) is installed on the sleeve (12) and is adapted to be disposed opposite to the first nut (322); The first screw (324) has its two ends threadedly connected to the first nut (322) and the second nut (323), respectively.

11. The pile foundation (1) according to any one of claims 1-7, characterized in that, The force transmission component (30) includes: The adapter ring (331) is fitted outside the pipe pile (20); The third nut (332) is installed on the outer wall of the adapter ring (331); The fourth nut (333) is installed on the sleeve (12) of the assembly, which is adapted to be disposed opposite to the third nut (332); The second screw (334) has its two ends threadedly connected to the third nut (332) and the fourth nut (333), respectively.

12. The pile foundation (1) according to claim 11, characterized in that, The adapter ring (331) is pivotally fitted onto the outside of the pipe pile (20). The outer peripheral wall of the pipe pile (20) forms a plurality of spaced-apart limiting bosses (214), and the adapter ring (331) is installed between two adjacent limiting bosses (214).

13. The pile foundation (1) according to any one of claims 1-7, characterized in that, The force transmission component (30) includes: The clamping ring (341) is fitted outside the pipe pile (20) and includes multiple sub-plates (3411) that can be detachably connected; The fifth nut (342) is installed on the outer wall of each of the sub-plates (3411); The sixth nut (343) is provided on the sleeve (12) of the assembly, which is adapted to be disposed opposite to the fifth nut (342); The third screw (344) has its two ends threadedly connected to the fifth nut (342) and the sixth nut (343), respectively.

14. A photovoltaic system, characterized in that, include: The pile foundation (1) is as described in any one of claims 1-13; A photovoltaic support (2) is installed on the pile foundation (1).

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