A waterborne photovoltaic system and a method for constructing the same

Abstract

The application discloses a water photovoltaic system, a steel trestle covering the functions of a cable channel, an operation and maintenance channel and a construction steel trestle, reduces the laying of the number of channels, and does not need to lay different support frames when the photovoltaic module is installed, steel ropes are connected with steel columns, and the steel ropes support walkway plates, the weight of the steel ropes and the walkway plates is far less than the weight of the steel, so that the weight borne by each pipe pile can be effectively reduced, the spacing between the pipe piles can be set larger, the use amount of the pipe piles can be effectively reduced under the condition of equal total length, and the overall construction cost is further reduced. The water photovoltaic system construction method provided by the application can be used for erecting a water photovoltaic system, and the same technical effects can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe pile construction, and further relates to a water-based photovoltaic system and a construction method thereof. BACKGROUND

[0002] At present, under the drive of the "double carbon" goal, photovoltaics are expanding increasingly diversified application scenarios. Developing photovoltaics in complex terrains not only faces challenges such as technology, procedure handling, construction, operation and maintenance, special climate environment, and economy, but also faces problems such as lack of development cases, insufficient practical experience, inadequate supporting policies, and lack of special planning.

[0003] The existing water-based photovoltaic system needs to erect supporting cable channels, operation and maintenance channels, and construction steel trestles while erecting photovoltaic components. These channels usually need to be separately laid with different support structures, and the support structures have small base spacings and require a large amount of support materials, resulting in high overall construction costs.

[0004] For those skilled in the art, how to reduce the overall construction cost of the water-based photovoltaic system is a technical problem to be solved at present. SUMMARY

[0005] The present application provides a water-based photovoltaic system, a steel trestle covering the functions of cable channels, operation and maintenance channels, and construction steel trestles, reducing the number of channel laying, effectively reducing the amount of pipe piles, and further reducing the overall construction cost. The specific scheme is as follows:

[0006] A water-based photovoltaic system includes a photovoltaic array, a steel trestle, and a support pipe pile. The steel trestle and the photovoltaic array are supported and erected by the support pipe pile. The steel trestle includes a steel column fixed to the support pipe pile, at least two groups of lower steel cables, each group of lower steel cables connected to each steel column in turn, two groups of upper steel cables, each group of upper steel cables connected to each steel column in turn, an inter-cable link between the lower steel cables and the upper steel cables, a plurality of inter-cable links distributed at intervals, a walkway plate laid on the lower steel cables, the walkway plate being a profiled steel plate, one walkway plate placed between two adjacent inter-cable links, and a cable bridge installed on one side of the walkway plate, the inside of the cable bridge used for installing cables, and the other side of the walkway plate empty for operation and maintenance of the photovoltaic system.

[0007] The present application also provides a water-based photovoltaic system construction method, including the following steps:

[0008] S1, transporting and stacking the support pipe pile;

[0009] S2, performing support pipe pile construction by a piling device;

[0010] S3, steel trestle construction and photovoltaic array installation, specifically comprising:

[0011] Select some support pipe piles to install steel columns, place the steel columns on the top of the support pipe piles, adjust the verticality, and connect the steel column bottom plate and the support pipe pile top through high-strength bolts;

[0012] Connect the upper steel cable through the ear plate at the upper part of the steel column, connect the lower steel cable through the ear plate at the lower part of the steel column, and connect adjacent steel columns through the upper steel cable and the lower steel cable;

[0013] The upper steel cable and the lower steel cable respectively reserve tie rod connectors, the inter-cable connecting rod is fixed to between the upper steel cable and the lower steel cable through bolts, and the upper steel cable and the lower steel cable are connected into a plane through the inter-cable connecting rod;

[0014] The walkway plate reserves installation holes, is laid on the lower steel cable through the walkway plate connector, and a walkway plate is placed between two adjacent inter-cable connecting rods;

[0015] Install the photovoltaic array in combination with the installed walkway plate, and fix the photovoltaic array on the remaining support pipe pile through the photovoltaic support;

[0016] Install the cable bridge on one side of the walkway plate, arrange and install the cable of the photovoltaic array in the cable bridge through the other side of the walkway plate, and complete the construction.

[0017] Optionally, the step S1 of transporting the support pipe pile comprises:

[0018] Supply the pipe pile by barge, organize the barge to be full of pipe piles to the front end of the piling site and sit on the beach at low tide, and supply the pipe pile at the front end at high tide;

[0019] The crane takes out the pipe pile from the barge and adjusts the pipe pile to a vertical state;

[0020] Use the piling platform integrated by the floating box body and the piling equipment to carry out pile foundation construction, the piling platform is responsible for moving or is equipped with power movement by the positioning tugboat, after moving to the specified position, the positioning pile of the piling platform is inserted into the seabed to fix the position, and the piling equipment carried thereon carries out pile foundation construction;

[0021] The amphibious piling machine is used as a supplementary machine, is responsible for the position where the piling platform cannot be constructed due to shallow water depth near the shore, and is responsible for supplying the pre-stressed pipe pile at the construction position of the piling platform far from the shore at low tide.

[0022] Optionally, the step S2 of supporting the pipe pile construction further comprises: when the pipe column top is 0.5 m away from the water surface during piling, stopping, lifting another section of pipe pile, and welding the two sections of pipe pile to each other, and continuing to pile after welding is completed.

[0023] Optionally, the adjusting the pipe pile to a vertical state comprises: hoisting at a distance of 0.239L from the pile end, where L is the length of a single pipe pile.

[0024] Optionally, the welding the two sections of pipe pile to each other comprises:

[0025] The radial misalignment deviation should not be greater than 2 mm; the gap between the connecting plates should be filled with wedge-shaped iron pieces, and the gap should not be greater than 2 mm; and welding should be symmetrically applied at the weld.

[0026] Optionally, the step S3 of installing the steel column and the upper and lower steel cables comprises:

[0027] At least two of the support pipe piles are arranged side by side as a group support, each of the support pipe piles is fixed with a steel column, each of the steel columns is connected with a group of upper and lower steel cables, respectively, and angle steel cross supports are arranged between the support pipe piles of the group support, and the angle steel cross supports are fixed to the support pipe piles by hoops;

[0028] Or a single support pipe pile is used as a group support, and a group of upper and lower steel cables are connected on both sides of the steel column, respectively.

[0029] Optionally, the step S3 of installing the photovoltaic support comprises:

[0030] An independent support is arranged on each pipe pile, and each independent support is used to independently install a photovoltaic module;

[0031] Or, a combined support is arranged on two or more pipe piles, and a photovoltaic module is installed on the combined support.

[0032] Optionally, the step of the crane taking out the pipe pile from the barge comprises:

[0033] The pipe pile hoisting adopts a two-point method or a two-end wire hook method, the distance between the two hoisting points and the pile end is 0.2L, and the horizontal angle between the rope and the pile body should not be less than 45 degrees, where L is the length of a single pipe pile.

[0034] The application provides a water photovoltaic system, a steel trestle covering the functions of a cable channel, an operation and maintenance channel and a construction steel trestle, reduces the laying of the number of channels, and does not need to lay different support frames when the photovoltaic module is installed, the steel cables are connected to the steel columns, and the walkway plates are supported, the weight of the steel cables and the walkway plates is far less than the weight of the steel, so that the weight borne by each pipe pile can be effectively reduced, and the spacing between the pipe piles can be set larger, the amount of the pipe piles can be effectively reduced under the condition of equal total length, and the overall construction cost is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0036] Figure 1 A front view of a specific embodiment of the steel trestle in the water photovoltaic system provided by the present application;

[0037] Figure 2 A side view of a specific embodiment of the water photovoltaic system provided by the present application.

[0038] The drawings include:

[0039] The support pipe pile 1, the steel column 2, the lower steel cable 3, the upper steel cable 4, the walkway plate 5, the cable bridge 6, the inter-cable connecting rod 7, and the angle steel cross support 8. DETAILED DESCRIPTION

[0040] In order for those skilled in the art to better understand the technical solutions of the present application, the operation and maintenance cable steel trestle and the steel trestle construction method of the present application will be described in detail below in combination with the drawings and specific embodiments.

[0041] The application provides a water photovoltaic system, including a photovoltaic array, a steel trestle, and a support pipe pile 1, the steel trestle and the photovoltaic array are both supported and erected by the support pipe pile 1; the steel trestle includes a steel column 2, a lower steel cable 3, an upper steel cable 4, a walkway plate 5, and a cable bridge 6, the steel column 2 is fixed to the support pipe pile 1, the steel column 2 is vertically arranged, the lower end of the steel column 2 is fixed to the upper end of the support pipe pile 1, and the steel column 2 is provided with a plurality of steel columns 2 for providing support to the lower steel cable 3 and the upper steel cable 4.

[0042] The lower steel cable 3 is provided in at least two sets, and each set of lower steel cable 3 is connected to each steel column 2 in sequence; the upper steel cable 4 is provided in two sets, and each set of upper steel cable 4 is connected to each steel column 2 in sequence; the lower steel cable 3 and the upper steel cable 4 extend in a roughly parallel manner, and together they form the two sides of the steel walkway structure.

[0043] A cable-connecting rod 7 is installed between the lower steel cable 3 and the upper steel cable 4. Several cable-connecting rods 7 are distributed at intervals and are set vertically. The lower steel cable 3 and the upper steel cable 4 are connected to each other through the cable-connecting rods 7. The lower steel cable 3 and the upper steel cable 4 form a grid structure through multiple cable-connecting rods 7, and the lower steel cable 3 and the upper steel cable 4 maintain a relatively uniform vertical spacing.

[0044] The walkway slab 5 is laid on the lower steel cable 3 and is supported by the lower steel cable 3. The walkway slab 5 is a profiled steel sheet. One walkway slab 5 is placed between two adjacent cable connecting rods 7. Multiple walkways 5 form a supporting surface, which can be used for people to walk and for installing other structures. Specifically, the walkway slab 5 provided by the present invention is a corrugated profiled steel sheet. The corrugated steel sheet is a corrugated folded plate, which can ensure sufficient support force while meeting the requirements of lightweighting.

[0045] Cable tray 6 is installed on one side of the walkway panel. The inside of cable tray 6 is used for cable installation, while the other side of the walkway panel is left empty for the operation and maintenance of the photovoltaic system. For example... Figure 1 As shown, the cable tray 6 is biased to the right side of the walkway 5, and the left side surface of the walkway 5 is accessible for maintenance personnel to walk on, making it convenient for them to reach the corresponding positions for operation and maintenance.

[0046] In the floating photovoltaic system provided by this invention, the steel walkway can be used as a cable channel, maintenance channel, and construction steel walkway, reducing the amount of channel laying required. Moreover, it does not require different support structures when installing photovoltaic modules. The steel columns 2 are connected by the lower steel cable 3 and the upper steel cable 4, which support the walkway slab 5. The weight of the steel cable and the walkway slab is much less than the weight of the steel section, thus effectively reducing the weight borne by each pipe pile. Therefore, the spacing between the supporting pipe piles 1 can be set to be larger. Under the condition of equal total length, the number of pipe piles can be effectively reduced, further reducing the overall construction cost.

[0047] The present invention also provides a construction method for a floating photovoltaic system, applicable to the above-mentioned floating photovoltaic system, comprising the following steps:

[0048] S1. Transportation and stacking of support pipe piles: After stacking the support pipe piles in the open environment for 3 to 7 days, they can be shipped out after passing inspection and transported to the construction site for stacking.

[0049] S2, support pipe pile construction by piling equipment; the piling equipment straightens up a single support pipe pile 1 and applies an impact force to the support pipe pile 1, so that the support pipe pile penetrates into the ground, and the exposed pile top of the pipe pile is used to provide support. During pipe pile construction, multiple support pipe piles 1 are arranged at different positions according to the drawing requirements, forming a support pipe pile array.

[0050] S3, steel trestle construction and photovoltaic array installation, specifically including:

[0051] Some support pipe piles are selected to install steel columns, the steel columns 2 are placed on the pile tops of the support pipe piles 1, the verticality is adjusted, and the steel column bottom plate and the support pipe pile top are connected through high-strength bolts; in the large support pipe pile array, a part of the support pipe piles are selected as the support of the steel trestle, and another part of the support pipe piles support photovoltaic modules, so as to form a photovoltaic array, whether the steel trestle and the photovoltaic modules adopt the same specification support pipe piles to provide support and erection.

[0052] The upper part of the steel column 2 is connected with the upper steel cable 4 through an ear plate, the lower part of the steel column 2 is connected with the lower steel cable 3 through an ear plate, and adjacent steel columns 2 are connected through the upper steel cable 4 and the lower steel cable 3; the upper steel cable 4 and the lower steel cable 3 are supported by the steel column 2, and during erection, the steel column 2 is first fixed to the support pipe pile 1, and then the upper steel cable 4 and the lower steel cable 3 are respectively installed on the steel column 2.

[0053] The upper steel cable 4 and the lower steel cable 3 respectively reserve tie rod connecting pieces, the inter-cable tie rod is fixed to between the upper steel cable 4 and the lower steel cable 3 through bolts and the tie rod connecting pieces, and the upper steel cable 4 and the lower steel cable 3 are connected into a plane through the inter-cable tie rod 7, that is, the upper steel cable 4, the lower steel cable 3 and the inter-cable tie rod 7 are located in the same plane, which can provide protection for the personnel passing on the walkway plate 5. The tie rod connecting piece can adopt a T-shaped sleeve piece, the tie rod connecting piece is tightly fixed to the corresponding positions of the upper steel cable 4 and the lower steel cable 3 through a hoop clamp or a bolt, and the inter-cable tie rod is fastened on the side through a bolt after being inserted into the T-shaped interface of the T-shaped connecting piece or directly connected through a bolt; of course, the inter-cable tie rod 7 can also adopt other connectable and fixed structures such as welding.

[0054] The walkway plate 5 reserves installation holes and is laid on the lower steel cable through a walkway plate connecting piece, a walkway plate is placed between adjacent two inter-cable tie rods 7, and the walkway plate connecting piece can be a flange structure in which the edges of a profiled steel plate are buckled into steel cable buckles, or a hoop type structure including a hoop type structure connected with a steel cable and a bolt fixing structure on the hoop type structure matched with a reserved installation hole, or other connectable and fixed structures such as a welding piece; after the inter-cable tie rod 7 is installed, the walkway plate 5 is laid on the lower steel cable 3, and the lower steel cable 3 is supported by the walkway plate 5; adjacent walkway plates 5 are spliced with each other without leaving gaps or only leaving small gaps, so as to avoid interference to walking.

[0055] The photovoltaic array is installed in combination with the installed walkway plate 5, and the photovoltaic array is fixed on the remaining support pipe pile 1 through a photovoltaic support; since the walkway plate 5 can be used for walking, personnel walk on the steel trestle after the steel trestle is erected in advance, so as to realize the function of auxiliary erection.

[0056] The cable bridge is installed on one side of the walkway plate 5, the cable of the photovoltaic array is arranged and installed in the cable bridge 6 through the other side of the walkway plate 5, and the construction is completed; when the photovoltaic module is installed, the cable is installed in the cable bridge 6, so as to provide a wiring guide space for the cable.

[0057] The water photovoltaic system construction method provided by the application can erect a water photovoltaic system, the method uses a steel trestle as a cable channel, an operation and maintenance channel and a construction steel trestle, reduces the amount of required channel laying, and does not need to lay different support frames when the photovoltaic module is installed; the lower steel cable 3 and the upper steel cable 4 are connected to the steel column 2 and support the walkway plate 5; the weight of the steel cable and the walkway plate is far less than the weight of the steel, so the weight borne by each pipe pile can be effectively reduced, and the spacing between the support pipe piles 1 can be set larger; under the condition of equal total length, the amount of pipe piles can be effectively reduced, and the overall construction cost is further reduced.

[0058] The transportation process of the support pipe pile in the above step S1 includes:

[0059] The pipe pile is supplied by a barge; when the tide recedes, the barge is organized to be full of pipe piles and to be landed at the front end of the piling position; and when the tide rises, the pipe pile at the front end is supplied. The application mainly uses a small barge to supply the pre-stressed pipe pile; the pipe pile at the front end is supplied when the tide rises; at the same time, when the tide recedes, the barge is organized to be full of pipe piles and to be landed at the front end of the piling position, so as to reduce the transportation pressure of the amphibious pile driver, and the function of pipe pile transportation is completed by the barge, and the amphibious pile driver focuses on piling operation.

[0060] The crane takes out the pipe pile from the barge and adjusts the pipe pile to a vertical state. A plurality of pipe piles are placed in the barge, the crane takes out the pipe piles from the barge one by one, and the pipe piles can be supplied to the amphibious pile driver one by one. The pipe piles are placed in the barge in a horizontal state, and the pipe piles are adjusted to a vertical state by the crane before piling, so as to be used for piling operation by the amphibious pile driver.

[0061] The pile foundation construction is performed by using a piling platform integrated by a floating box body and a piling device; the piling platform is responsible for moving or is equipped with power movement by a positioning tugboat, is moved to a specified position, a positioning pile of the piling platform is inserted into the seabed to fix the position, and a piling device carried on the piling platform performs pile foundation construction. The piling platform serves as a main piling machine and is mainly responsible for piling operation.

[0062] The amphibious pile driver is used as a supplementary machine, is responsible for the construction at the near shore, shallow water, and the position where the pile driving platform cannot be constructed, and is responsible for the prestressed pipe pile supply at the position where the pile driving platform is constructed at the far shore during the ebb tide. The amphibious pile driver applies the impact force to the pipe pile for pile driving, and stops the pile driving when the penetration degree reaches the standard. The wind and wave resistance of the amphibious pile driver is weaker than that of the container floating platform, is greater than that of the small pile foundation construction ship, can be used for the construction operation in the shallow water, and has the operation flexibility superior to that of the container floating platform operation. The amphibious pile driver is composed of a floating box body and pile driving equipment, the floating platform has a length of about 15m, is responsible for the movement under the guidance of the positioning tug or is equipped with the power movement, after being moved to the specified position, the positioning pile on the ship body can be inserted into the seabed to fix the position, the position of the pile driving platform is relatively stable, and the pile driving machine carried thereon can be used for the pile foundation construction. When the wind and wave are large, the platform is greatly rocked, and the construction cannot be performed, the operation is stopped or is pulled back to the wharf to avoid the danger. The amphibious pile driver can lift the 15m long prestressed pipe pile for the construction, and will not be affected by the height limitation.

[0063] The support is arranged on the pipe pile, and the photovoltaic assembly and the steel trestle are arranged on the support. Before the steel trestle is installed, the equipment, the support and the walkway plate are checked according to the design requirements of the drawing, the support is welded and painted well, and the assembly is good in appearance and has no damage. According to the design and the support, the photovoltaic support is installed by on-site assembly and welding. After the steel trestle is installed, the walkway plate is straight and has no deformation.

[0064] The method can realize the construction of the offshore photovoltaic system by the barge, the crane and the amphibious pile driver.

[0065] The step S2 of supporting the pipe pile construction further includes that when the pipe column top is 0.5m away from the water surface, the pile driving is paused, another section of pipe pile is lifted, and the two sections of pipe pile are welded with each other, and the pile driving is continued after the welding is completed. That is, two or more sections of pipe pile are spliced to form a longer pipe pile and are drilled into a deeper depth.

[0066] The pipe pile is adjusted to the vertical state, including that the binding point is 0.239L away from the pile end, and the pipe pile is lifted by single point lifting.

[0067] The two sections of pipe pile are welded with each other, including that the radial offset deviation is not greater than 2mm, the gap between the connecting plates is filled with wedge-shaped iron pieces, the gap is not greater than 2mm, and the welding is symmetrically performed at the weld.

[0068] Before piling, mark the meter intervals on one side of the pile for recording during piling. Use a single-point hoisting method for pile erection, with the binding point 0.239L from the pile end. The crane feeds the pipe pile to the piling machine, which then adjusts its verticality to meet requirements before construction begins. Stop construction when the top of the first pile section is 0.5m above the water surface. Hoist the second pipe pile section, operating as before, until the center line of the upper and lower pile sections coincide. Check the verticality, ensuring the upper and lower pile sections are straight with a misalignment deviation not exceeding 2mm. Then clean debris from the connecting piles, filling the gaps between the connecting plates with wedge-shaped iron plates, ensuring the gaps do not exceed 2mm. Welding is employed, requiring two people to perform symmetrical welding. Welds should be continuous and full, and weld slag should be thoroughly removed.

[0069] The above step S3 involves the installation of the steel column, upper steel cable, and lower steel cable. The supporting pipe pile 1 has two installation methods:

[0070] The first type involves at least two supporting pipe piles 1 arranged side by side as a group of supporting components. Each supporting pipe pile 1 is fixed with a steel column 2. Each steel column 2 is connected to a set of upper steel cables 4 and lower steel cables 3 respectively. Angle steel cross supports 8 are set between the supporting pipe piles 1 of the group of supporting components to improve the support strength. The angle steel cross supports 8 are fixed to the supporting pipe piles by clamps.

[0071] The second type uses a single supporting pipe pile 1 as a group of supporting components, with a set of upper steel cables and a set of lower steel cables connected to both sides of the steel column.

[0072] This invention appendix Figure 1 The structure shown illustrates the first configuration described above, which uses two supporting pipe piles 1 as a set of supporting components and two supporting pipe piles as supports to improve the structural strength.

[0073] The photovoltaic bracket installation process in step S3 above specifically includes two methods:

[0074] The first method involves installing an independent support frame on each pipe pile, with each frame used to independently install photovoltaic modules. Each independent support frame can independently install photovoltaic modules, and the photovoltaic modules on each frame are independent of each other.

[0075] The second method involves setting up a combined support structure on two or more pipe piles, and then installing photovoltaic modules on the combined support structure. The combined support structure is supported by two or more pipe piles, and multiple photovoltaic modules can be installed on it. Using a combined support structure can reduce the number of pipe piles, but the diameter of each individual pipe pile is larger to provide more stable support.

[0076] The crane removes the pipe piles from the barge, including:

[0077] Pipe pile hoisting adopts two fulcrum method or two end wire hanger method, two hoisting points distance pile end is 0.2L, rope and pile body horizontal angle of inclusion must not be less than 45 degrees, wherein L is single pipe pile length, should be light to put, strictly prohibit throwing, collision, roll.

[0078] The operation and maintenance cable steel trestle of the application connects the steel column 2 through the lower steel cable 3 and the upper steel cable 4, and supports the walkway plate 5 by the lower steel cable 3. For the large-span structure, the steel cable can be bent and deformed. The weight of the steel cable and the walkway plate is far less than the weight of the traditional section steel, so the weight borne by each pipe pile 1 can be effectively reduced, and the spacing between the pipe piles 1 can be set larger. Under the condition of equal total length, the use amount of pipe piles can be effectively reduced, and the construction cost is reduced.

[0079] Before the steel trestle is installed, the cement and sundries on the surface of the PHC pipe pile embedded iron should be cleaned by the construction unit, and the measurement error should meet the design requirements. The steel trestle support and accessories meeting the design specifications are transported to the site, the support should not be significantly twisted and deformed, and the galvanized layer should be complete. The steel column is placed on the pile top, the perpendicularity is adjusted, the column bottom plate and the pipe pile end plate are connected by high-strength bolts through the reserved holes on the pipe pile end plate. The upper and lower ear plates on the steel column are connected with adjacent steel columns by flexible cables. The flexible cables are steel wire bundle, steel strand, steel wire rope or hoisting belt. The reserved tie rod connecting piece is reserved on the upper and lower steel cables, the steel tie rod is fixed between the upper and lower steel cables by bolts. The upper and lower steel cables are connected into a plane by the inter-cable steel tie rod. The steel tie rod is generally a circular tube. The reserved mounting holes are reserved on the walkway plate, and the walkway plate is fixed on the lower steel cable by the connecting piece.

[0080] The cable bridge 6 installation should meet the following requirements:

[0081] 1. All steel materials should be flat, no significant distortion, after cutting the length deviation should be within 5mm, the cut should be no curling, burr. 2. The cable tray support should be installed according to the cable tray direction, mark the fixed point position. 3. The cable tray support should be installed firmly, horizontal and vertical. 4. The cable tray type and size should meet the requirements. The horizontal and vertical deviation of the cable tray installation should be within 2mm per meter, the total length should be within 10mm. The connection of different height cable trays should be smooth, the cable tray butt joint should be without error. The cable tray should be installed according to the principle of installing main line first, then installing branch line. 5. The cable tray should be connected by connecting plate, the nut should be outward and connected tightly. 6. The branch of the cable tray should be connected by elbow, tee, cross, according to the actual situation, some elbows need to be made on site. 7. The cable tray should be fixed on the support by bolt, the bolt should be fixed firmly by self-tapping screw. 8. The cable tray should be installed flat, the horizontal and vertical deviation and the center line deviation of each straight line should be less than 5mm. 9. The connection of cable tray and lead-out pipeline: the cable tray opening should use professional opening device, electric and gas welding cutting is strictly prohibited.

[0082] The transportation and stacking of pipe piles should meet the following requirements: 1. The pipe piles should be stacked in the open air environment for 3-7 days, and then they can be delivered after passing the inspection. 2. The pipe piles should be lifted by two-point method or two-end lifting method, the distance between the two lifting points (two-point method) and the pile end should be 0.2L (L is the length of the pile section), the horizontal angle between the rope and the pile body should not be less than 45 degrees, and the loading and unloading should be light, and throwing, collision and rolling are strictly prohibited. 3. During transportation, the support points should meet the position of two-point method (0.2L from the pile end) and be padded with wedge-shaped wood to prevent rolling, and the distance between the wood and the pile end should not be different to cause misalignment. The stacking layer during water transportation should meet the specification requirements; during automobile transportation, the stacking layer should not exceed two layers, and if necessary, it can be appropriately increased. 4. The pipe pile stacking site should be compacted and leveled, and have drainage measures. The pipe pile stacking should be carried out according to the two-point method, the lowermost support point should be placed on the wood, and the support points should be on the same horizontal plane. The stacking layer should be determined comprehensively according to the pipe pile degree, ground bearing capacity, wood and stacking stability, etc., and the pipe pile stacking layer should not exceed 8 layers.

[0083] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for constructing a water-based photovoltaic system, applied to a water-based photovoltaic system, characterized in that, The waterborne photovoltaic system comprises a photovoltaic array, a steel trestle, and a support pipe pile, the steel trestle and the photovoltaic array are both supported and erected by the support pipe pile; The steel trestle comprises: A steel column fixed to the support pipe pile; A lower cable, at least two groups of which are arranged, each group of the lower cable being sequentially connected to each steel column; an upper cable, two groups of which are arranged, each group of the upper cable being sequentially connected to each steel column; a cable-to-cable connecting rod being arranged between the lower cable and the upper cable, and a plurality of cable-to-cable connecting rods being distributed at intervals; A walkway board being laid on the lower cable, the walkway board being a profiled steel plate, and one walkway board being placed between two adjacent cable-to-cable connecting rods; A cable bridge being installed on one side of the walkway board, the inside of the cable bridge being used for installing cables, and the other side of the walkway board being empty for the operation, maintenance and repair of the photovoltaic system; The waterborne photovoltaic system construction method comprises the following steps: S1. Transport and stacking of the support pipe pile; S2. Construction of the support pipe pile by a piling equipment; S3. Construction of the steel trestle and installation of the photovoltaic array, specifically comprising: Selecting some support pipe piles to install steel columns, placing the steel columns on the top of the support pipe piles, adjusting the verticality, and connecting the bottom plate of the steel column and the top of the support pipe pile by high-strength bolts; Connecting the upper cable to the upper part of the steel column by an ear plate, connecting the lower cable to the lower part of the steel column by an ear plate, and connecting adjacent steel columns by the upper cable and the lower cable; Reserving a tie rod connecting piece for each of the upper cable and the lower cable, fixing the cable-to-cable connecting rod to the upper cable and the lower cable by bolts, and connecting the upper cable and the lower cable into a plane by the cable-to-cable connecting rod; Reserving an installation hole for the walkway board, laying the walkway board on the lower cable by a walkway board connecting piece, and placing one walkway board between two adjacent cable-to-cable connecting rods; Installing the photovoltaic array in combination with the installed walkway board, and fixing the photovoltaic array on the remaining support pipe piles by a photovoltaic support; Installing a cable bridge on one side of the walkway board, arranging and installing the cables of the photovoltaic array in the cable bridge on the other side of the walkway board, and completing the construction.

2. The method of constructing a water-based photovoltaic system of claim 1, wherein, The step S1 of transporting the support pipe pile comprises: Supplying the pipe piles by barges, organizing the barges to be full of pipe piles to the front piling site and to sit on the beach at ebb tide, and supplying the pipe piles at the front end at flood tide; Taking out the pipe piles from the barges by a crane and adjusting the pipe piles to be vertical; Performing pile foundation construction by a piling platform integrated by a floating box body and a piling equipment, moving the piling platform to a specified position by a positioning tugboat, inserting a positioning pile of the piling platform into a fixed position of a seabed, and performing pile foundation construction by the piling equipment carried on the piling platform; A amphibious piling machine is used as a supplementary machine, is responsible for positions near the shore where the piling platform cannot be constructed due to shallow water depth, and is responsible for supplying the pre-stressed pipe piles at the construction position of the piling platform far from the shore at ebb tide.

3. The method of constructing a water-based photovoltaic system of claim 1, wherein, The step S2 supporting pipe pile construction further comprises: when the pipe column top is 0.5 m away from the water surface during piling, stopping, hoisting another section of pipe pile, and welding the two sections of pipe pile to each other, and continuing to pile after welding is completed.

4. The method of constructing a water-based photovoltaic system of claim 3, wherein, The pipe pile is adjusted to a vertical state, which comprises: hoisting at a distance of 0.239L from the pile end, where L is the length of a single pipe pile.

5. The method of constructing a water-based photovoltaic system of claim 4, wherein, The two sections of pipe pile are welded to each other, which comprises: The radial misalignment deviation should not be greater than 2 mm; the gap between the connecting plates is filled with wedge-shaped iron pieces, and the gap should not be greater than 2 mm; and symmetrical welding is performed at the weld.

6. The method of constructing a PV system over water of claim 1, wherein, The step S3 of installing the steel column and the upper and lower steel cables comprises: At least two of the support pipe piles are arranged side by side as a group support, each of the support pipe piles is fixed with a steel column, each of the steel columns is connected with a group of upper and lower steel cables respectively, and angle steel cross supports are arranged between the support pipe piles of the group support, and the angle steel cross supports are fixed to the support pipe piles by hoops; Or a single support pipe pile is used as a group support, and a group of upper and lower steel cables are connected on both sides of the steel column respectively.

7. The method of constructing a PV system over water of claim 1, wherein, The step S3 of installing the photovoltaic support comprises: An independent support is arranged on each pipe pile respectively, and each independent support is used to independently install a photovoltaic module; Or, a combined support is arranged on two or more pipe piles, and a photovoltaic module is installed on the combined support.

8. The method of constructing a water-based photovoltaic system of claim 2, wherein, The crane takes out the pipe pile from the barge, which comprises: Pipe pile hoisting adopts two-point method or two-end wire hook hoisting method, the distance between the two hoisting points and the pile end is 0.2L, and the horizontal angle between the rope and the pile body should not be less than 45 degrees, where L is the length of a single pipe pile.

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