Construction method of integral raft type overwater photovoltaic bearing frame

Abstract

The invention discloses a construction method of an integral raft type water photovoltaic supporting frame. The integral raft type water photovoltaic supporting frame comprises a photovoltaic upper support and a foundation structure. The foundation structure comprises a raft foundation, a plurality of piles installed on the raft foundation and foundation hanging rings. A special hanging bracket adopted in the construction method comprises a hanging bracket frame, a plurality of equipment hanging rings installed on the top face of the hanging bracket frame, a plurality of hanging bracket hanging rings installed on the bottom face of the hanging bracket frame, a plurality of rope collecting devices installed on the top face of the hanging bracket frame and a plurality of hanging ropes with the upper ends connected to the rope collecting devices, and the lower end of each hanging rope is connected with an elastic shackle. The special hanging bracket is adjusted to the position over the overall photovoltaic supporting frame through hoisting equipment, and the hanging rope is lowered through the rope winding device till the elastic shackle at the lower end of the hanging rope is connected with the basic hanging ring; the whole photovoltaic supporting frame is lowered to an underwater foundation by using a crane ship, and then the elastic shackle and the foundation hanging ring are automatically unhooked through the rope winding device. The installation precision can be improved, and the overwater operation amount can be reduced.

Description

Technical Field

[0001] This invention relates to a construction method for an integral raft-type floating photovoltaic support frame. Background Technology

[0002] With the global energy structure shifting towards cleaner energy, floating photovoltaic (PV) technology has become a research hotspot in the new energy field due to its significant advantages. Compared to onshore PV systems, floating PV offers advantages such as abundant resources, unobstructed water surface, high light reflection, low temperature rise loss, proximity to load centers, and less dust. Currently, floating PV support structures include floating and pile-fixed types. Pile-fixed PV support structures consist of a PV upper support and four or six piles driven into the water. The PV upper support is a truss structure including a PV platform and four or six legs connected to the bottom of the platform. Each leg has a support base at its bottom, and PV panels are installed on the top surface of the platform. The height of the first two or three legs is greater than the height of the last two or three legs. Each of the four or six piles has a connecting seat at its top for corresponding connection with the four or six support bases, allowing the PV platform to tilt 15° with the front higher than the back. Commonly used pile types include steel pipe piles and prestressed concrete pipe piles. The type of pile used is selected based on factors such as geological conditions, construction conditions, and project cost. The installation of the photovoltaic upper support requires high positioning accuracy of the pile foundation, but due to limitations in on-site equipment and construction environment, it is difficult to control the pile position deviation within an acceptable range, thus causing installation difficulties.

[0003] Furthermore, existing methods for hoisting photovoltaic (PV) upper supports require pre-drilling four or six hoisting holes on the PV platform, each corresponding to one of the four or six support points (without PV panels installed). Four or six steel wire ropes are then connected to these support points via four or six lifting lugs on the hoisting frame before hoisting. After the four or six support points are connected to the four or six pile foundations, the PV panels at the four or six hoisting holes need to be installed above water, increasing the time spent on the water and raising operational risks. Alternatively, omitting the installation of the PV panels at the four or six hoisting holes would reduce the number of PV panels required, impacting the installed capacity. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art and provide a construction method for an integral raft-type floating photovoltaic support frame, which can facilitate the installation of the upper photovoltaic support frame, not only improve the construction quality, but also greatly reduce the amount of water-based work.

[0005] The objective of this invention is achieved as follows: a construction method for an integral raft-type floating photovoltaic support frame, the integral raft-type floating photovoltaic support frame comprising a photovoltaic upper support and a foundation structure; wherein,

[0006] The upper photovoltaic support is of truss structure and includes a photovoltaic platform, several legs connected to the bottom of the photovoltaic platform, several fulcrum seats respectively installed at the bottoms of the several legs, and photovoltaic panels installed on the top of the photovoltaic platform;

[0007] The foundation structure includes a raft foundation, several pile columns, and several foundation lifting rings;

[0008] On the surface of the raft foundation, several pile column positioning platforms are reserved, and the planar layout positions of the several pile column positioning platforms correspond to the planar layout positions of the several fulcrum seats of the upper photovoltaic support one by one; several connecting bolts are embedded uniformly on each pile column positioning platform;

[0009] The bottom of the pile column is provided with a connecting ring plate; the connecting ring plates of the several pile columns are respectively fixed on the several pile column positioning platforms of the raft foundation through several connecting bolts one by one;

[0010] Several foundation lifting rings are embedded uniformly on the surface of the raft foundation;

[0011] The construction method uses a special lifting frame, which includes a lifting frame frame, four equipment lifting rings, several lifting frame lifting rings, several rope winding devices, and several lifting ropes; the plane of the lifting frame frame is in the shape of a lying 'day'; the four equipment lifting rings are installed uniformly on the top surface of the lifting frame frame; several lifting frame lifting rings are installed on the bottom surface of the lifting frame frame, and the layout positions of the several lifting frame lifting rings correspond to the layout positions of the several foundation lifting rings embedded on the raft foundation one by one; several rope winding devices are all installed on the top surface of the lifting frame frame and are respectively located above the several lifting frame lifting rings; the upper ends of the several lifting ropes pass through the several lifting frame lifting rings one by one and are respectively connected to the several rope winding devices, and the lower end of each lifting rope is connected with an elastic shackle;

[0012] The construction method includes the following steps:

[0013] Step S1: Prefabricate the raft foundation, prefabricate the raft foundation according to the underwater foundation conditions, reserve several pile column positioning platforms on the surface of the raft foundation according to the specific dimensions of the upper photovoltaic support to be installed, and embed several foundation lifting rings;

[0014] Step S2: First prefabricate the pile columns, fix a connecting ring plate at the bottom of each pile column, and fix a connecting seat at the top of each pile column, then hoist the pile columns, and fix the connecting ring plate of each pile column on the corresponding pile column positioning platform on the raft foundation through several connecting bolts; install all the pile columns on the raft foundation in sequence;

[0015] Step S3: First, fabricate the upper photovoltaic support frame and install support bases at the bottom of several legs of the upper photovoltaic support frame. Then, install photovoltaic panels on the upper photovoltaic support frame. Finally, lift the upper photovoltaic support frame and assemble it onto the top of several piles of the foundation structure to form an overall photovoltaic support frame.

[0016] Step S4: First, connect the lifting wire rope of the lifting equipment to the four equipment lifting rings on the special hanger. Then, the lifting equipment adjusts the special hanger to the top of the overall photovoltaic support frame. Then, several rope winding devices are used to lower several ropes one by one until the elastic shackles at the lower ends of several ropes are connected to several foundation lifting rings on the raft foundation one by one.

[0017] Step S5: The integrated photovoltaic support frame is hoisted onto the transport ship using lifting equipment. A special gantry is placed next to the integrated photovoltaic support frame and transported together to the project construction site by the transport ship.

[0018] Step S6: After the underwater foundation is leveled at the project construction site, the overall photovoltaic support frame is first lifted by a crane boat and lowered at the designated position until it sits on the underwater foundation. Then, several rope-reeling devices are remotely controlled on site to automatically disengage several elastic shackles from several foundation lifting rings. Then, several lifting ropes are retrieved and finally lifted off the special lifting frame.

[0019] The above-mentioned construction method for an integrated raft-type floating photovoltaic support frame, wherein the raft foundation is a flat raft foundation or a beam-slab raft foundation.

[0020] In the above-mentioned construction method for the overall raft-type floating photovoltaic support frame, each beam of the special lifting tool's frame is a hollow quadrangular prism structure.

[0021] In the above-mentioned construction method of the overall raft-type floating photovoltaic support frame, in step S2, the pile column and the raft foundation may be prefabricated as a whole.

[0022] In the above-mentioned construction method for the overall raft-type floating photovoltaic support frame, when performing step S3, the upper photovoltaic support frame is preferably manufactured in the same prefabrication yard as the prefabricated foundation structure.

[0023] The construction method of the integral raft-type floating photovoltaic support frame of the present invention has the following characteristics:

[0024] 1) Raft foundation is adopted, which is suitable for hard foundations such as hard clay, dense sand or rock foundation; the piles are installed on the raft foundation in the prefabrication yard, with high installation accuracy, which meets the installation requirements of the upper photovoltaic support.

[0025] 2) The upper photovoltaic support structure is installed on the foundation structure on land, and the photovoltaic panels are installed in place on land in one go, which can greatly reduce the need for water-based operations;

[0026] 3) The lower end of the hoisting rope is equipped with a spring-loaded shackle, and the top of the hoisting rope is connected to the rope winding device, which facilitates automatic unhooking and retrieval of the hoisting rope;

[0027] 4) After the operation period ends, the basic structure can be lifted away from the project site, and the marine area can be easily restored;

[0028] 5) Both the impact of construction and the recycling of the basic structure are beneficial to environmental protection. Attached Figure Description

[0029] Figure 1 This is an elevation view of the overall raft-type floating photovoltaic support frame of the present invention;

[0030] Figure 2 yes Figure 1 Side view;

[0031] Figure 3 Side view of the foundation structure of the integral raft-type floating photovoltaic support frame of the present invention;

[0032] Figure 3a This is a plan view of the flat raft base in the overall raft-type floating photovoltaic support frame of the present invention;

[0033] Figure 3b yes Figure 3a Elevation drawing

[0034] Figure 4a This is a plan view of the beam-plate raft foundation in the overall raft-type floating photovoltaic support frame of the present invention;

[0035] Figure 4b This is an elevation view of the beam-plate raft foundation in the overall raft-type floating photovoltaic support frame of the present invention;

[0036] Figure 5a This is a plan view of the special hanger used in the construction method of the integral raft-type floating photovoltaic support frame of the present invention;

[0037] Figure 5b yes Figure 5a Elevation view;

[0038] Figure 6 This is a state diagram during step S4 of the construction method of the integral raft-type floating photovoltaic support frame of the present invention. Detailed Implementation

[0039] The invention will now be further described with reference to the accompanying drawings.

[0040] Please see Figures 1 to 6The construction method of the integral raft-type floating photovoltaic support frame of the present invention involves a photovoltaic support frame including a photovoltaic upper support 1 and a foundation structure 2.

[0041] The photovoltaic upper support 1 is a truss structure and includes a photovoltaic platform 10, six legs 11 connected to the bottom of the photovoltaic platform 10, six fulcrum seats 12 installed one-to-one at the bottom of the six legs 11, and photovoltaic panels installed on the top of the photovoltaic platform 10.

[0042] Foundation structure 2 includes a raft foundation 2A, six pile columns 2B, and six foundation lifting rings 2C; among which,

[0043] The raft foundation 2A is a reinforced concrete structure, and can be either a flat raft foundation or a beam-slab raft foundation. The flat raft foundation only includes a foundation flat 20 with a width greater than that of the photovoltaic platform 10. The beam-slab raft foundation includes a foundation flat 20 with a width greater than that of the photovoltaic platform 10 and longitudinal and transverse beams 21 fixed on the surface of the foundation flat 20. Six pile positioning platforms 22 are reserved on the surface of the raft foundation 2A. The planar arrangement of the six pile positioning platforms 22 is located at the intersection of the longitudinal and transverse beams 21 and corresponds one-to-one with the planar arrangement of the six support seats 12 on the upper support of the photovoltaic system 1. Several connecting bolts 23 are evenly embedded on each pile positioning platform 22.

[0044] The pile column 2B adopts prestressed concrete pipe pile or precast column; the bottom of each pile column 2B is provided with a connecting ring plate, and several mounting holes are evenly distributed around the circumference of the connecting ring plate, which correspond one-to-one with several connecting bolts 23 pre-embedded on each pile column positioning platform 22; the connecting ring plates of the six pile columns 2B are each fixed to the six pile column positioning platforms 21 of the raft foundation 2A by several connecting bolts 23.

[0045] Six basic lifting rings 2C are evenly distributed and pre-embedded on the surface of the raft foundation 2A.

[0046] The construction method of the integral raft-type floating photovoltaic support frame of the present invention adopts a special hanger 3, which includes a hanger frame 3A, four equipment lifting rings 3B, six hanger rings 3C, six rope winding devices 3D, and six lifting ropes 30; the hanger frame 3A has a planar shape reversible and includes a rectangular frame composed of two horizontal beams 31 and two longitudinal beams 32, and a central longitudinal beam 33 spanning the middle of the two horizontal beams 31; the horizontal beams 31, longitudinal beams 32, and central longitudinal beam 33 are all hollow quadrangular prism trusses and include two upper chords 301, two lower chords 302, multiple straight web members 303 and multiple diagonal web members 304 connecting the upper chords 301 and lower chords 302, and a connecting rod 305 connecting the two upper chords 301 and the two lower chords 302; Reinforcing rods 306 are provided between the two ends of the longitudinal beam 33 and the two ends of the two transverse beams 31, respectively; four equipment lifting rings 3 are installed on the top surface of the hanger frame 3A; six hanger lifting rings 3C are installed on the bottom surface of the hanger frame 3A; the arrangement of the six hanger lifting rings 3C corresponds one-to-one with the arrangement of the six foundation lifting rings 2C pre-embedded on the raft foundation 2A, and the six hanger lifting rings 3C are arranged one-to-one at the two ends of the two longitudinal beams 32 and the two ends of the middle longitudinal beam 33; six rope winding devices 3D are all installed on the top surface of the hanger frame 3A and are located one-to-one above the six hanger lifting rings 3C; the upper ends of the six lifting ropes 30 pass through the six hanger lifting rings 3C and are connected to the six rope winding devices 3D one-to-one, and the lower end of each lifting rope 30 is connected to an elastic shackle 3E.

[0047] The construction method of the integral raft-type floating photovoltaic support frame of the present invention includes the following steps:

[0048] Step S1: Precast raft foundation 2A. Precast flat raft foundation or beam raft foundation according to the underwater foundation conditions, and pre-embed six pile positioning platforms 22 and six foundation lifting rings 2C according to the specific dimensions of the photovoltaic upper support 1 to be installed.

[0049] Step S2: First, prefabricate the piles 2B, and fix a connecting ring plate at the bottom of each pile 2B and a connecting seat at the top of each pile 2B. The piles 2B can have a uniform diameter or a variable diameter, with the top smaller than the bottom. Then, hoist the piles 2B and fix the connecting ring plate of the piles 2B to the corresponding pile positioning platform 22 on the raft foundation 2A using several connecting bolts 23. Install all the piles 2B on the raft foundation 2A in sequence. Alternatively, the piles 2B and the raft foundation 2A can be prefabricated as a whole.

[0050] Step S3: First, fabricate the photovoltaic upper support 1, and install the support base 12 at the bottom of the six legs 11 of the photovoltaic upper support 1. Then, install the photovoltaic panels on the photovoltaic upper support 1. Next, lift the photovoltaic upper support 1 and assemble it on the top of the six piles 2B of the foundation structure 2 to form an integrated photovoltaic support frame. When fabricating the photovoltaic upper support 1, it should preferably be carried out in the same prefabrication yard as the prefabricated foundation structure 2. If the photovoltaic upper support 1 is fabricated in other steel structure sites, it should be transported to the prefabrication yard of the foundation structure 2 after it is completed and the photovoltaic panels are installed.

[0051] Step S4: First, connect the lifting wire rope of the lifting equipment to the four equipment lifting rings 3B on the special gantry 3. Then, the lifting equipment will adjust the special gantry 3 to be directly above the overall photovoltaic support frame 100. Then, the six rope winding devices 3D will be used to lower the six lifting ropes 30 one by one until the elastic shackles 3E at the lower end of the six lifting ropes 30 are connected one by one to the six foundation lifting rings 2C on the raft foundation 2A.

[0052] Step S5: The entire photovoltaic support frame is hoisted onto the transport ship using lifting equipment. The special gantry 3 is placed in the support position next to the entire photovoltaic support frame and transported together to the project construction site by the transport ship.

[0053] Step S6: After the underwater foundation is leveled at the project construction site, the entire photovoltaic support frame is first lifted by a crane boat and lowered to the designated position until it sits on the underwater foundation. Then, the six rope reeling devices 3D are remotely controlled on site to automatically disengage the six elastic shackles 3E from the six foundation lifting rings 2C. The six lifting ropes 30 are then retrieved and finally lifted off the special lifting frame 3 for reuse.

[0054] When the service life of the entire photovoltaic support frame expires, it can be lifted away as a whole for maintenance and reuse. Alternatively, the corresponding upper photovoltaic support frame 1 can be removed as needed for maintenance and reuse.

[0055] The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the scope of the invention and should be defined by the claims.

Claims

1. A construction method for an integral raft-type floating photovoltaic support frame, the integral raft-type floating photovoltaic support frame comprising a photovoltaic upper support and a foundation structure; the photovoltaic upper support is a truss structure and includes a photovoltaic platform, several legs connected to the bottom of the photovoltaic platform, several fulcrums correspondingly installed at the bottom of the legs, and photovoltaic panels installed on the top of the photovoltaic platform; characterized in that, The foundation structure includes a raft foundation, several pile columns and several foundation lifting rings; On the surface of the raft foundation, several pile column positioning platforms are reserved. The planar layout positions of the several pile column positioning platforms correspond one-to-one with the planar layout positions of the several support seats of the photovoltaic upper bracket; several connecting bolts are pre-buried evenly on each pile column positioning platform; A connecting ring plate is provided at the bottom of each pile column; the connecting ring plates of the several pile columns are respectively fixed on the several pile column positioning platforms of the raft foundation through several connecting bolts in a one-to-one correspondence; Several foundation lifting rings are pre-buried evenly on the surface of the raft foundation; The construction method uses a special hanging bracket. The special hanging bracket includes a hanging bracket frame, four equipment lifting rings, several hanging bracket lifting rings, several rope winding devices and several suspension ropes; the plane of the hanging bracket frame is in the shape of an inverted Chinese character 'Ri'; the four equipment lifting rings are installed evenly on the top surface of the hanging bracket frame; several hanging bracket lifting rings are installed on the bottom surface of the hanging bracket frame, and the layout positions of the several hanging bracket lifting rings correspond one-to-one with the layout positions of the several foundation lifting rings pre-buried on the raft foundation; several rope winding devices are all installed on the top surface of the hanging bracket frame and are respectively located above the several hanging bracket lifting rings; the upper ends of the several suspension ropes pass through the several hanging bracket lifting rings respectively and are connected with the several rope winding devices in a one-to-one correspondence, and the lower end of each suspension rope is connected with an elastic shackle; The construction method includes the following steps: Step S1: Prefabricate the raft foundation, prefabricate the raft foundation according to the underwater foundation conditions, reserve several pile column positioning platforms on the surface of the raft foundation according to the specific dimensions of the photovoltaic upper bracket to be installed, and pre-bury several foundation lifting rings; Step S2: First prefabricate the pile columns, fix a connecting ring plate at the bottom of each pile column, and fix a connecting seat at the top of each pile column, then hoist the pile columns, and fix the connecting ring plate of each pile column on the corresponding pile column positioning platform on the raft foundation through several connecting bolts; install all the pile columns on the raft foundation in sequence; Step S3: First manufacture the photovoltaic upper bracket, install support seats at the bottoms of several legs of the photovoltaic upper bracket, then install photovoltaic panels on the photovoltaic upper bracket, and then hoist the photovoltaic upper bracket and assemble it to the tops of the several pile columns of the foundation structure to form an integral photovoltaic support frame; Step S4: First connect the lifting steel wire rope of the hoisting equipment with the four equipment lifting rings on the special hanging bracket, then adjust the special hanging bracket to directly above the integral photovoltaic support frame by the hoisting equipment, and then lower the several suspension ropes through the several rope winding devices in a one-to-one correspondence until the elastic shackles at the lower ends of the several suspension ropes are connected with the several foundation lifting rings on the raft foundation in a one-to-one correspondence; Step S5: Hoist the integral photovoltaic support frame onto the transport ship by the hoisting equipment, place the special hanging bracket at the resting position beside the integral photovoltaic support frame, and transport it to the project construction site together by the transport ship; Step S6: After the underwater foundation is leveled at the project construction site, the overall photovoltaic support frame is first lifted by a crane boat and lowered at the designated position until it sits on the underwater foundation. Then, several rope-reeling devices are remotely controlled on site to automatically disengage several elastic shackles from several foundation lifting rings. Then, several lifting ropes are retrieved and finally lifted off the special lifting frame.

2. The construction method of the integral raft-type floating photovoltaic support frame according to claim 1, characterized in that, The raft foundation is either a flat raft foundation or a beam-slab raft foundation.

3. The construction method of the integral raft-type floating photovoltaic support frame according to claim 1, characterized in that, Each beam of the lifting frame of the special lifting device is a hollow quadrangular truss structure.

4. The construction method of the integral raft-type floating photovoltaic support frame according to claim 1, characterized in that, When performing step S2, the piles and the raft foundation may be prefabricated as a whole.

5. The construction method of the integral raft-type floating photovoltaic support frame according to claim 1, characterized in that, When performing step S3, the upper photovoltaic support structure is preferably manufactured in the same prefabrication yard as the prefabricated foundation structure.

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