Photovoltaic flexible support side span structure for fishing and light complementation

Abstract

The utility model provides a photovoltaic flexible support side span structure for fishing-light complementation, which comprises a plurality of combined pile groups arranged at intervals along the direction of a second axis, and each combined pile group comprises two combined pile structures arranged at intervals along the direction of a first axis; the combined pile structure is in an A shape and comprises a bearing platform foundation and two inclined piles connected to the bearing platform foundation, the bearing platform foundation is connected to the middle portions of the inclined piles in the axial direction, and the top ends of the two inclined piles are connected together through an anchoring block. The inhaul cable extends in the first axis direction, and the two ends of the inhaul cable are anchored to the anchoring blocks correspondingly. The connecting beams connect the combined pile structures located on the same side in the first axis direction together. In the application, the bearing platform foundation, the inclined piles, the connecting beams and the inhaul cables jointly form a space truss structure, so that the quality of the structure can be effectively improved, a lot of building materials are saved by using the inclined piles, and the construction cost is reduced.

Description

Technical Field

[0001] This utility model relates to a flexible photovoltaic support structure for solar-fishery complementary industries. Background Art

[0002] Solar-aquaculture complementarity is a new solar energy utilization model developed with minimal impact on aquaculture. Specifically, it refers to the installation of photovoltaic panels above the water surface of fish ponds, reservoirs, lakes, and other aquaculture areas to develop the solar energy industry and improve the overall benefits of aquaculture water areas. To adapt to the special conditions of water areas, flexible supports are usually used to install photovoltaic panels.

[0003] The photovoltaic flexible support transfers the load to the side span structure through the pre-tensioned cable structure. Due to the large prestress in the cable, the side span structure needs to bear both vertical and horizontal loads at the same time. Moreover, the load is a dynamic load, and the soil below the water surface is relatively soft, which puts forward higher requirements for the long-term stability of the side span structure.

[0004] Side span structures typically employ vertical pile foundations or a single vertical pile plus anchor bolt scheme. When using a single pile for the vertical pile foundation, the vertical bearing capacity of the single pile is generally sufficient. However, due to the large horizontal displacement of the single pile, it is difficult to meet the deformation requirements of the side span structure. Larger diameter piles are needed to satisfy the horizontal deformation requirements of the side span structure, leading to increased construction difficulty and cost. When using a pile group for the vertical pile foundation, a larger number of piles are required, resulting in a larger workload and higher cost.

[0005] The vertical monopile + anchor bolt scheme uses pile foundations to provide vertical bearing capacity and inclined anchor bolts to provide horizontal bearing capacity. It can leverage the advantages of both piles and anchor bolts. However, since both piles and anchor bolts are subjected to force independently, the overall structural deformation control capacity is insufficient and the overall integrity is poor. In addition, due to the long structure of the anchor bolts, the construction quality is difficult to control, and it requires a large additional space, resulting in low land utilization.

[0006] In some schemes, inclined piles are used as pile foundations. While this can improve the pile foundation's resistance to horizontal loads to some extent, it presents significant challenges in construction technology. When cast-in-place piles such as grouted piles are used for inclined piles, the abundance of groundwater in the construction area makes drilling the pile holes difficult, easily leading to pile hole collapse and drill bit burial. Furthermore, the drill rod is prone to deflection during construction, causing bending in the pile hole, affecting the sinking of the reinforcing cage. The quality of underwater concrete pouring is also difficult to control, requiring high construction standards. When precast piles are used as inclined piles, the pile driver needs to be tilted during construction, resulting in poor accuracy in pile positioning on the ground, leading to low construction precision and potential inconsistencies between adjacent piles.

[0007] Given the above reasons, how to complete the side span structure of photovoltaic flexible support at low cost and with high quality remains a problem that needs to be solved. Utility Model Content

[0008] To reduce the construction cost of the side span structure of existing photovoltaic flexible support and improve its construction accuracy, this application proposes a side span structure of photovoltaic flexible support for fishery-solar complementary projects, which includes a number of combined pile groups spaced apart along the second axis direction, and each combined pile group includes two combined pile structures spaced apart along the first axis direction.

[0009] At least one composite pile structure is A-shaped, comprising a pile cap foundation and two inclined piles connected to the pile cap foundation, with the upper ends of the inclined piles extending upwards above the ground; in the same composite pile structure, either inclined pile is inclined toward the other inclined pile, the pile cap foundation is connected to the middle part in the axial direction of the inclined pile, and an anchor block connects the top ends of the two inclined piles in the same composite pile structure together; the centerlines of the four inclined piles in at least one composite pile group are located in the same vertical plane extending along the first axis.

[0010] The cable extends along the first axis, and both ends of the cable are anchored to the anchor blocks respectively; the connecting beam connects the composite pile structures located on the same side in the first axis direction; the first axis direction and the second axis direction both extend horizontally and are perpendicular to each other.

[0011] In this application, the pile cap foundation, inclined piles, connecting beams, and cables together form a spatial truss structure, possessing high overall stiffness, stability, and resistance to deformation. The relatively inclined piles provide significant side friction resistance and high horizontal bearing capacity, effectively reducing horizontal displacement at the pile top and vertical displacement at the pile bottom, thereby significantly minimizing soil heave around the piles. The inclined piles provide horizontal bearing capacity under compression, fully utilizing their axial bearing capacity to reduce shear force and bending moment caused by lateral loads, saving substantial amounts of building materials and lowering construction costs. The pile cap foundation also serves as a construction platform for the inclined piles, and specialized guide holes can be installed on the foundation to reduce the difficulty of constructing the inclined piles.

[0012] As a post-cast component, the anchor block can correct construction deviations in inclined piles, making construction quality easy to control and effectively improving construction quality.

[0013] Furthermore, to facilitate the sinking of the inclined pile, a guide hole is pre-drilled in the foundation. The inclined pile is driven into the ground through this guide hole, and a bonding block formed by high-early-strength grout is placed inside the guide hole. This bonding block connects the inclined pile to the foundation. Currently, a special guide frame is usually required when sinking inclined piles. The design in this application allows the foundation to act as a guide frame, eliminating the need for a dedicated guide frame in the prior art. After the inclined pile has been driven, the bonding block connects the foundation to the inclined pile.

[0014] Furthermore, to improve the connection strength between the inclined pile and the foundation, a bottom connecting bar hole is provided on the inclined pile. The bottom connecting bar passes through the bottom connecting bar hole and is connected to the steel cage in the foundation. The bottom connecting bar is cast into the bonding block.

[0015] Furthermore, a guide tube is fixedly installed inside the guide hole, allowing the inclined pile to sink into the ground. After the inclined pile has sunk, the guide tube is removed. High-early-strength grout is poured into the guide hole after the guide tube is removed. The outer diameter of the guide tube is smaller than the inner diameter of the guide hole. Preferably, the inner diameter of the guide hole is 100-500 mm larger than the outer diameter of the inclined pile. Using a larger guide hole facilitates precise adjustment of the inclination and sinking position of the inclined pile. Due to inherent construction defects in concrete construction, its accuracy is relatively low; the guide tube helps to correct these defects. Additionally, enlarging the guide hole makes it easier to pour high-early-strength grout into it, ensuring that the grout fills the gap between the guide hole and the inclined pile.

[0016] In this application, the use of a guide tube effectively reduces the construction difficulty of inclined piles. Because of the guide tube, the inclined pile can be accurately positioned. When sinking inclined piles without a guide tube, the pile is prone to deviating from its intended position. Furthermore, when sinking inclined piles solely using a guide hole, defects inherent in the concrete pouring process often cause deviations in the guide hole. Using a guide tube not only corrects these deviations but also allows for a longer guide tube, enhancing its guiding effect and facilitating more precise positioning of the inclined pile.

[0017] When driving inclined piles, the lower end of the inclined pile is first inserted into the guide tube, and the pile driver's own clamping device is held at the upper end of the inclined pile to complete the positioning of the inclined pile. This design can reduce construction costs while ensuring accurate driving of the inclined pile. Currently, when driving inclined piles, a special guide frame is usually required. Before driving the pile, the pile body needs to be placed on the guide frame to be positioned. After the inclined pile is positioned, it is then driven.

[0018] Furthermore, to enhance the guiding effect of the guide tube, at least one end of the guide tube extends out of the guide hole.

[0019] Furthermore, an upper connecting bar hole is provided at the top of the inclined pile, through which the upper connecting bar passes and connects to the steel cage inside the anchor block. The tops of the two inclined piles in the same composite pile structure are completely connected together by the anchor block. The upper connecting bar can make the two inclined piles more firmly connected into one, ensuring the connection strength between the two inclined piles.

[0020] Furthermore, the inclined pile is a hollow pile, with a core-filled steel reinforcement cage inserted into its inner cavity. This cage extends upwards from the inner cavity and connects to a steel reinforcement cage within the anchor block. The core-filled steel reinforcement cage further enhances the connection strength between the inclined pile and the anchor block. During the pouring of the anchor block, concrete enters the inner cavity of the hollow pile, encasing the core-filled steel reinforcement cage.

[0021] Specifically, the cables are anchored to the connecting beams, and at least one cable is installed on each side of the second axis direction in a composite pile structure. Alternatively, cable holes are pre-drilled in the anchor blocks, through which the cables pass and are locked to the anchor blocks. In actual construction, different cable arrangement methods can be adopted according to different requirements.

[0022] Furthermore, the two composite pile structures in each composite pile group are referred to as the first composite pile structure and the second composite pile structure, respectively. Along the first axis, in each composite pile group, the second composite pile structure is located on the same side of the first composite pile structure; at least a portion of the first composite pile structures are arranged in a row along the second axis, or at least a portion of the second composite pile structures are arranged in a row along the second axis. This design facilitates the installation of connecting beams and improves space utilization. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0024] Figure 2 This is a structural schematic diagram of a composite pile structure.

[0025] Figure 3 yes Figure 2 Enlarged view of section A.

[0026] Figure 4 yes Figure 2 Enlarged view of section B.

[0027] Figure 5 This is a schematic diagram of an inclined pile.

[0028] Figure 6 This is a schematic diagram after the foundation of the pier cap has been completed.

[0029] Figure 7 This is a schematic diagram after the inclined pile has been sunk.

[0030] Figure 8 This is a schematic diagram showing the high early strength grouting material inside the guide hole after it has been poured.

[0031] Figure 9 This is a schematic diagram after the anchor block has been poured.

[0032] Figure 10 This is a schematic diagram showing the completed construction of the connecting beams and cables. DETAILED DESCRIPTION

[0033] The following describes the side span structure of the photovoltaic flexible support system for fishery-solar complementary projects. Please refer to [link / reference needed]. Figure 1 In the attached diagram, the first arrow X points to the direction of the first axis, and the second cylinder Y points to the direction of the second axis. Both the first and second axis directions extend horizontally and are perpendicular to each other.

[0034] The photovoltaic flexible support side span structure specifically includes several combined pile groups 200 spaced apart along the second axis. Figure 1 The example shows eight sets of combined piles. Figure 1 In the diagram, a range of 200 for a combined pile group is shown using a double-dotted line. It can be understood that, depending on different requirements, each photovoltaic flexible support side span structure may include only two combined pile groups, or five, ten, twenty, or even more combined pile groups.

[0035] Each pile group includes two pile structures spaced apart along the first axis. For ease of description, the two pile structures in each pile group are referred to as the first pile structure 201 and the second pile structure 202, respectively. In the direction of the first axis, in each pile group, the second pile structure 202 is located on the same side of the first pile structure 201. Figure 1 In this embodiment, the second combined pile structures 202 are all located to the right of the first combined pile structures 201. Furthermore, in this embodiment, the first combined pile structures 201 are arranged in a row along the second axis, and the second combined pile structures 202 are arranged in a row along the second axis.

[0036] The first connecting beam 311 connects the first combined pile structures 201 together, and the second connecting beam 312 connects the second combined pile structures 202 together. That is, the connecting beams connect the combined pile structures located on the same side in the direction of the first axis.

[0037] Please see Figure 2In this embodiment, each composite pile structure includes a foundation 21 and two inclined piles 22 connected to the foundation. The upper ends of the inclined piles extend upwards above the ground. In the same composite pile structure, each inclined pile is inclined towards the other. The foundation 21 is connected to the middle part of the inclined pile in the axial direction, making the composite pile structure A-shaped. An anchor block 23 is provided at the top of the two inclined piles in the same composite pile structure, connecting the top ends of the two inclined piles together. The inclined piles are specifically PHC pipe piles. In other embodiments, the inclined piles can also be square piles or solid piles. There are no special requirements for the specific selection of inclined piles. However, since this application is used in high-humidity areas such as fish ponds, the inclined piles need to have strong corrosion resistance. When steel piles are used as inclined piles, anti-corrosion treatment is required. However, it is generally not recommended to use steel piles; concrete piles are preferred. Figure 2 In the diagram, 100 represents the ground.

[0038] In this embodiment, to improve the overall integrity of the photovoltaic flexible support side span structure, the foundations of each of the ten first combined pile structures are interconnected to form a whole, and the foundations of each of the ten second combined pile structures are interconnected to form a whole. Figure 1 In the diagram, dashed lines represent individual pile cap foundations connected as a whole. It is understood that in other embodiments, each composite pile structure may have its own independent pile cap foundation, or two, three, or more adjacent pile cap foundations may be connected as a whole. That is, at least two pile cap foundations of the first composite pile structure may be connected as a whole, or two pile cap foundations of the second composite pile structure may be connected as a whole.

[0039] In this embodiment, two cables 32 are provided for each composite pile structure. The two cables 32 are located on both sides of the second axis direction of the corresponding composite pile structure, extending along the first axis direction. Both ends of the cables are fixed to the first connecting beam 311 and the second connecting beam 312 via anchors, so that both ends of the cables are anchored to the anchor blocks via the first connecting beam 311 and the second connecting beam 312. That is, in this embodiment, one cable is provided on each side of the second axis direction of each composite pile structure. It is understood that, depending on different needs, only one cable may be provided on each side of the second axis direction for some composite pile structures, and a cable may be provided on one side of some composite pile structures. It is also understood that the cables may be directly anchored to the anchor blocks. In this embodiment, the cables are made of steel strand, and a clamp-type anchor 33 is used to anchor the steel strand. It is understood that in other embodiments, high-strength threaded steel may be used as the cables, and when high-strength threaded steel is used as the cables, high-strength nuts may be used to anchor the high-strength threaded steel.

[0040] In this embodiment, both the first connecting beam 311 and the second connecting beam 312 are fixed to the anchor block 23. To facilitate the installation of the first and second connecting beams, connecting bolts 236 are pre-embedded in the anchor block, and the first and second connecting beams are fixed to the anchor block 23 by the connecting bolts 236. Both the first and second connecting beams are composed of two parallel H-beams, and the cable passes through the gap between the two parallel H-beams and is anchored by the wedge-type anchor 33.

[0041] When the cable is directly anchored to the anchor block, a cable hole needs to be pre-drilled in the anchor block. For ease of cable insertion, it is preferable that the cable hole extends through the anchor block along the first axis. After passing through this cable hole, the cable is locked to the anchor block. After the cable installation and tensioning are completed, epoxy resin or high-early-strength grout is injected into the cable hole to improve the connection strength between the cable and the anchor block. However, after injecting epoxy resin or high-early-strength grout into the cable hole, during subsequent use, when the cable undergoes plastic deformation and elongates, it cannot be tensioned again to tighten the cable. Therefore, it is necessary to decide whether to inject epoxy resin or high-early-strength grout into the cable hole based on specific requirements.

[0042] In order to ensure that each inclined pile is subjected to force in the same direction and to avoid some inclined piles being subjected to large component forces in other directions, thus causing torsion, in this embodiment, the center lines of the four inclined piles of the same combined pile structure are located in the same vertical plane extending along the first axis. This design enables each inclined pile to mainly bear the component force in the first axis direction and the component force in the vertical direction.

[0043] Please see Figure 4 To facilitate the sinking of the inclined piles 22, a guide hole 212 is provided in the pile cap foundation 21 for each inclined pile 22. The inner diameter of the guide hole is 100-500mm larger than the outer diameter of the inclined pile. In this embodiment, the inner diameter of the guide hole is 200mm larger than the outer diameter of the inclined pile to facilitate the addition of connecting bars and the pouring of high-early-strength grout. Also, to facilitate fine-tuning of the position of the inclined pile, a guide cylinder 25 is inserted into the guide hole 212. Please refer to [further details omitted]. Figure 5 To facilitate fixing the guide cylinder 25, a positioning plate 27 is welded to the outer wall of the guide cylinder, and an internally threaded pipe 271 is pre-embedded in the foundation. A locking bolt 272 passes through the positioning plate 27 and is screwed into the internally threaded pipe 271, fixing the positioning plate 27 to the upper surface of the foundation. It can be understood that in another embodiment, expansion bolts can also be used to fix the positioning plate to the foundation. The guide cylinder is specifically made of steel pipe.

[0044] The inclined pile is lowered into the ground via a guide tube. The guide tube allows for fine-tuning of the pile's position and inclination angle to correct deviations in the foundation or guide hole caused by construction errors. After the inclined pile is lowered, locking bolt 272 is removed, and the guide tube is taken out from the top of the inclined pile. If the guide tube cannot be removed due to obstruction from another inclined pile, it can be cut. In this embodiment, the upper end of the guide tube extends upward beyond the upper surface of the foundation, causing it to protrude upward from the guide hole. It is understood that in other embodiments, the guide tube may also protrude downward from the guide hole, or its upper and lower ends may protrude upward and downward from the guide hole, respectively.

[0045] To avoid excessive friction between the guide tube and the inclined pile, which would affect the sinking efficiency of the inclined pile, and to reduce excessive vibration on the foundation during pile driving, the inner diameter of the guide tube is 1-10mm larger than the outer diameter of the inclined pile. In this embodiment, the inner diameter of the guide tube is 4mm larger than the outer diameter of the inclined pile.

[0046] Please also refer to Figure 4 and Figure 5 After the guide tube is removed, the lower connecting bar 213 is passed through the lower reinforcing bar hole 221 on the inclined pile and connected to the lower reinforcing cage 211 inside the pile cap foundation 21. Then, high early strength grout is poured into the guide hole. After solidification, the high early strength grout forms a bonding block 214, which fixes the inclined pile to the pile cap foundation. The lower connecting bar is poured into the high early strength grout, which can enter the inner cavity of the inclined pile through the lower reinforcing bar hole and wrap the lower connecting bar 213 located in the inner cavity of the inclined pile. High early strength grout is also known as ultra-early strength grout, high strength grout, and high strength cement-based grout.

[0047] It is understandable that, depending on different requirements, in another embodiment, the lower connecting bar and the corresponding lower through-bar hole can be omitted, and grouting material can be directly poured into the guide hole after the guide cylinder is removed. Of course, in yet another embodiment, the guide cylinder can also be omitted. In this case, the guide hole needs to be precisely pre-drilled, and a steel cylinder can be pre-embedded in the guide hole. After the inclined pile is driven in, high-early-strength grouting material is poured into the gap between the guide hole and the inclined pile. Depending on different needs, a boss can also be poured on the upper side of the foundation cap to connect the foundation cap and the inclined pile. However, in these connection methods, cracks will appear between the foundation cap and the inclined pile after a long period of operation, and their service life and connection strength are weaker than those using the lower connecting bar method.

[0048] Please also refer to Figure 3 and Figure 5To improve the connection strength between the anchor block 23 and the inclined pile 22, an upper through-bar hole 222 is provided at the top of the inclined pile 22. The upper connecting bar 233 passes through the upper through-bar hole 22 and connects to the upper reinforcing cage 231 inside the anchor block. To further improve the connection strength between the anchor block 23 and the inclined pile 22, a core-filled reinforcing cage 232 is also inserted into the inner cavity of the inclined pile. The core-filled reinforcing cage extends upward out of the inner cavity of the inclined pile and connects to the upper reinforcing cage 231.

[0049] During the pouring of the anchor block, the concrete can enter the inner cavity of the inclined pile and wrap the core-filled steel cage 232 and the upper connecting bar located in the inner cavity of the inclined pile.

[0050] To gain a deeper understanding of this application, the construction method for the aforementioned photovoltaic flexible support side span structure is described below, with specific steps as follows:

[0051] (1) Please refer to Figure 6 Construct a foundation 21 in the designated area, and reserve a guide hole 212 on the foundation 21. Insert the guide cylinder 25 into the guide hole 212 and fix the guide cylinder 25 detachably on the foundation 21.

[0052] (2) Please refer to Figure 7 The inclined pile 22 is lowered into the ground through the guide tube 25.

[0053] (3) Please refer to Figure 8 Then, remove the guide tube 25, pass the lower connecting bar through the lower bar hole on the inclined pile and connect it to the lower steel cage in the foundation. Pour high early strength grout into the guide hole and connect the inclined pile to the foundation.

[0054] (4) Please refer to Figure 9 The upper steel cage 231 of the anchor block 23 is installed on the top of the inclined pile 22. The upper connecting bar is passed through the upper bar hole at the top of the inclined pile and connected to the upper steel cage of the anchor block. Concrete is poured to form the anchor block 23.

[0055] (5) Please refer to Figure 10 Erect the first connecting beam 311 and the second connecting beam 312, and install the cable 32.

[0056] When sinking inclined piles, there is no need to set up other inclined pile guiding devices. The inclined piles can be accurately positioned and sunk to the set position by relying solely on the pile driver and guide tube, which can effectively reduce construction costs.

Claims

1. A flexible photovoltaic support structure for solar-fishery complementary industries, characterized in that, It includes several combined pile groups spaced apart along the second axis, and each combined pile group includes two combined pile structures spaced apart along the first axis. At least one composite pile structure is A-shaped, comprising a pile cap foundation and two inclined piles connected to the pile cap foundation, with the upper ends of the inclined piles extending upwards above the ground; in the same composite pile structure, either inclined pile is inclined toward the other inclined pile, the pile cap foundation is connected to the middle part in the axial direction of the inclined pile, and an anchor block connects the top ends of the two inclined piles in the same composite pile structure together; the centerlines of the four inclined piles in at least one composite pile group are located in the same vertical plane extending along the first axis. The cable extends along the first axis, and both ends of the cable are anchored to the anchor blocks respectively; the connecting beam connects the composite pile structures located on the same side in the first axis direction; the first axis direction and the second axis direction both extend horizontally and are perpendicular to each other.

2. The photovoltaic flexible support side span structure according to claim 1, characterized in that, A guide hole is reserved on the foundation of the pile cap. The inclined pile is driven into the ground through the guide hole and has a bonding block formed by high early strength grout in the guide hole. The bonding block connects the inclined pile to the foundation of the pile cap.

3. The photovoltaic flexible support side span structure according to claim 2, characterized in that, A bottom connecting bar hole is provided on the inclined pile. The bottom connecting bar passes through the bottom connecting bar hole and is connected to the steel cage in the pile cap foundation. The bottom connecting bar is poured into the bonding block.

4. The photovoltaic flexible support side span structure according to claim 2, characterized in that, The guide tube is fixedly installed inside the guide hole. The inclined pile can be sunk into the ground through the guide tube. After the inclined pile has sunk, the guide tube is removed. The high early strength grout is poured into the guide hole after the guide tube is removed. The outer diameter of the guide tube is smaller than the inner diameter of the guide hole.

5. The photovoltaic flexible support side span structure according to claim 2, characterized in that, At least one end of the guide tube extends out of the guide hole.

6. The photovoltaic flexible support side span structure according to claim 1, characterized in that, An upper through-bar hole is provided at the top of the inclined pile, and the upper connecting bar passes through the upper through-bar hole and is connected to the steel cage inside the anchor block.

7. The photovoltaic flexible support side span structure according to claim 1, characterized in that, The inclined pile is a hollow pile. A core-filled steel cage is inserted into the inner cavity of the inclined pile. The core-filled steel cage extends upward out of the inner cavity of the inclined pile and connects to the steel cage in the anchor block.

8. The photovoltaic flexible support side span structure according to claim 1, characterized in that, The cables are anchored to the connecting beams, and at least one cable is provided on each side of the second axis direction of a composite pile structure.

9. The photovoltaic flexible support side span structure according to claim 1, characterized in that, The anchor block has a pre-drilled cable hole, through which the cable passes and is locked to the anchor block.

10. The photovoltaic flexible support side span structure according to claim 1, characterized in that, The two combined pile structures in each combined pile group are referred to as the first combined pile structure and the second combined pile structure, respectively. In the direction of the first axis, in each combined pile group, the second combined pile structure is located on the same side of the first combined pile structure; at least some of the first combined pile structures are arranged in a row along the direction of the second axis, or at least some of the second combined pile structures are arranged in a row along the direction of the second axis.

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