Construction method of integral negative pressure barrel type water photovoltaic bearing frame

Abstract

The invention discloses a construction method of an integral negative pressure barrel type overwater photovoltaic supporting frame. The integral negative pressure barrel type overwater photovoltaic supporting frame comprises a photovoltaic upper support and a foundation structure. The foundation structure comprises a negative pressure barrel, a plurality of piles installed on the negative pressure barrel and a foundation hanging ring. A special hanging bracket adopted in the construction method comprises a hanging bracket frame, a plurality of equipment hanging rings and a rope collecting device which are 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 device, 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 whole photovoltaic supporting frame, and the hanging rope is lowered through the rope winding device till the elastic shackle is connected with the basic hanging ring; the method comprises the following steps: firstly, putting the whole photovoltaic support frame into water; the whole photovoltaic supporting frame sinks to a stable state through self weight, then the elastic shackle and the basic hanging ring are automatically unhooked through the rope collecting device, then the hanging rope is recycled and lifted away from the special hanging bracket, and then the negative pressure barrel drains water and continues to sink. 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 negative pressure barrel-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 the four or six 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 also increasing operational risks. Alternatively, omitting the installation of PV panels at the four or six hoisting holes would reduce the number of PV panels required, affecting 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 negative pressure barrel-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 operations.

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

[0006] The photovoltaic upper support is a truss structure and includes a photovoltaic platform, several legs connected to the bottom of the photovoltaic platform, several support seats that are installed one-to-one at the bottom of the legs, and photovoltaic panels installed on the top of the photovoltaic platform.

[0007] The basic structure includes a negative pressure tank, several piles, and several foundation lifting rings;

[0008] The top plate of the negative pressure tank has several pile positioning platforms reserved. The planar arrangement of the pile positioning platforms corresponds one-to-one with the planar arrangement of the several support points of the photovoltaic upper support. Several connecting bolts are pre-embedded evenly on each pile positioning platform.

[0009] The bottom of the pile is provided with a connecting ring plate, and the connecting ring plates of several piles are fixed one by one to several pile positioning platforms of the negative pressure tank by several connecting bolts.

[0010] Several basic lifting rings are evenly distributed and pre-embedded in the top plate of the negative pressure tank;

[0011] The construction method employs a specialized hanger, which includes a hanger frame, four equipment lifting rings, several rope winding devices, and several lifting ropes. The hanger frame has a rectangular shape. The four equipment lifting rings are evenly distributed on the top surface of the hanger frame. The rope winding devices are installed on the hanger frame, and their positions correspond one-to-one with the positions of the foundation lifting rings pre-embedded in the negative pressure tank. The upper ends of the several lifting ropes are connected to the rope winding devices one-to-one, and the lower end of each rope is connected to an elastic shackle.

[0012] The construction method includes the following steps:

[0013] Step S1: Prefabricate the negative pressure tank, and according to the specific dimensions of the photovoltaic upper support to be installed, pre-embed several pile positioning platforms and several foundation lifting rings on the top plate of the negative pressure tank;

[0014] Step S2: First, precast the piles and fix a connecting ring plate at the bottom of each pile and a connecting seat at the top of each pile. Then, hoist the piles and fix the connecting ring plate of each pile to the corresponding positioning plate on the negative pressure tank with several connecting bolts. Install all the piles on the negative pressure tank 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. The lifting equipment will then adjust the special hanger to be directly above the overall photovoltaic support frame. Several ropes will be lowered one by one through several rope winding devices until the elastic shackles at the lower ends of the ropes are connected one by one to the basic lifting rings on the negative pressure tank.

[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: First, use a crane boat to lift the overall photovoltaic support frame, and then lower the overall photovoltaic support frame into the water at the designated position;

[0019] Step S7: The entire photovoltaic support frame first sinks under its own weight until it reaches a stable state. Then, several rope-reeling devices on the on-site remote control hanger automatically disengage several elastic shackles from several foundation lifting rings. Several lifting ropes are then retrieved and lifted off the special hanger. Then, the negative pressure tank drains water and continues to sink until the entire photovoltaic support frame sits on the bottom of the water.

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

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

[0022] In the above-mentioned construction method of the overall negative pressure barrel-type floating photovoltaic support frame, when performing step S3, the upper photovoltaic support frame is preferably manufactured in the same prefabrication yard as the prefabrication of the negative pressure barrel.

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

[0024] 1) The negative pressure bucket foundation is adopted, which is suitable for soft soil foundations above; the piles are installed on the negative pressure bucket 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 a side view of the integral negative pressure barrel-type floating photovoltaic support frame of the present invention;

[0030] Figure 2 This is a side view of the foundation structure in the overall negative pressure barrel-type floating photovoltaic support frame of the present invention;

[0031] Figure 3 This is a plan view of the negative pressure tank in the overall negative pressure tank-type floating photovoltaic support frame of the present invention;

[0032] Figure 4a This is a plan view of the special hanger used in the construction method of the integral negative pressure barrel-type floating photovoltaic support frame of the present invention;

[0033] Figure 4b This is an elevation view of the special hanger used in the construction method of the integral negative pressure barrel-type floating photovoltaic support frame of the present invention;

[0034] Figure 5 This is a state diagram during step S4 of the construction method of the overall negative pressure barrel-type floating photovoltaic support frame of the present invention;

[0035] Figure 6 This is a state diagram during step S6 of the construction method of the overall negative pressure bucket-type floating photovoltaic support frame of the present invention. Detailed Implementation

[0036] The invention will now be further described with reference to the accompanying drawings.

[0037] Please see Figures 1 to 6 The construction method of the overall negative pressure barrel-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.

[0038] The photovoltaic upper support 1 is a truss structure and includes a photovoltaic platform 10, four legs 11 connected to the bottom of the photovoltaic platform 10, four support seats 12 installed at the bottom of the four legs 11 in a one-to-one correspondence, and photovoltaic panels installed on the top of the photovoltaic platform 10.

[0039] The basic structure 2 includes a negative pressure tank 2A, four pile columns 2B, and four foundation lifting rings 2C;

[0040] The negative pressure tank 2A ​​includes a top plate 20, a wall panel 21, and a partition 22; four pile positioning platforms 23 are reserved on the top plate 20 of the negative pressure tank 2A, and the planar arrangement of the four pile positioning platforms 23 corresponds one-to-one with the planar arrangement of the four support seats 12 of the photovoltaic upper support 1; several connecting bolts 24 are evenly embedded on each pile positioning platform 23.

[0041] 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 24 pre-embedded on each pile foundation positioning platform 23; the connecting ring plates of the four pile columns 2B are each fixed to the four pile column positioning platforms 23 of the negative pressure tank 2A ​​one-to-one by several connecting bolts 24.

[0042] Four basic lifting rings 2C are evenly distributed and pre-embedded in the top plate of the negative pressure tank 2A.

[0043] The construction method of the integral negative pressure bucket-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, four rope winding devices 3C, and four lifting ropes 30; the hanger frame 3A is a rectangular frame composed of two horizontal beams 31 and two longitudinal beams 32; the horizontal beams 31 and the longitudinal beams 32 are both hollow quadrangular prism trusses and include two upper chords 301, two lower chords 302, multiple straight web members 303 connecting the upper chords 301 and the lower chords 302, and multiple inclined web members 303. The frame includes a rod 304 and a connecting rod 305 connecting the two upper chord rods 301 and the two lower chord rods 302; four equipment lifting rings 3B are evenly distributed on the top surface of the hanger frame 3A; four rope winding devices 3C are installed on the hanger frame 3A, and the arrangement of the four rope winding devices 3C corresponds one-to-one with the arrangement of the four foundation lifting rings 2C pre-embedded in the negative pressure tank 2A; the upper ends of the four lifting ropes 30 are connected to the rope winding devices 3C one-to-one, and the lower end of each lifting rope 30 is connected to an elastic shackle 3D.

[0044] The construction method of the integral negative pressure barrel-type floating photovoltaic support frame of the present invention includes the following steps:

[0045] Step S1: Prefabricate the negative pressure tank 2A, and according to the specific dimensions of the photovoltaic upper support 1 to be installed, pre-embed four pile positioning platforms 21 and four foundation lifting rings 2C on the top plate of the negative pressure tank 2A;

[0046] Step S2: First, prefabricate the pile column 2B, fix a connecting ring plate at the bottom of each pile column 2B, and fix a connecting seat at the top of each pile column 2B. Then, hoist the pile column 2B and fix the connecting ring plate of the pile column 2B to the corresponding positioning plate 23 on the negative pressure tank 2A ​​with several connecting bolts 24. Install all the pile columns 2B on the negative pressure tank 2A ​​in sequence. Alternatively, the pile column 2B and the negative pressure tank 2A ​​can be prefabricated as a whole.

[0047] Step S3: First, fabricate the photovoltaic upper support 1, and install the support base 12 at the bottom of the four legs 11 of the photovoltaic upper support 1. Then, install the photovoltaic panels on the photovoltaic upper support 1, and then lift the photovoltaic upper support 1 and assemble it on the top of the four 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.

[0048] Step S4: First, connect the lifting wire rope of the lifting equipment to the four equipment lifting rings 3B on the special hanger 3. Then, the lifting equipment will adjust the special hanger 3 to the top of the overall photovoltaic support frame. Then, the four rope winding devices 3C will be used to lower the four lifting ropes 30 one by one until the elastic shackles 3D at the lower end of the four lifting ropes 30 are connected one by one to the four basic lifting rings 2C on the negative pressure tank 2A.

[0049] 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.

[0050] Step S6: First, use a crane boat to lift the entire photovoltaic support frame, and then lower the entire photovoltaic support frame into the water at the designated position;

[0051] Step S7: The entire photovoltaic support frame sinks under its own weight until it reaches a stable state. Then, the four rope winding devices 3C on the on-site remote control hanger 3 automatically disengage the four elastic shackles 3D from the four basic lifting rings 2C. The four lifting ropes 30 are then retrieved and lifted off the special hanger 3. The negative pressure tank 2A ​​drains water and continues to sink until the negative pressure tank 2A ​​of the entire photovoltaic support frame sits on the bottom of the water.

[0052] 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.

[0053] 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 negative pressure barrel-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 basic structure includes a negative pressure tank, several piles, and several foundation lifting rings; The top plate of the negative pressure tank has several pile positioning platforms reserved. The planar arrangement of the pile positioning platforms corresponds one-to-one with the planar arrangement of the several support points of the photovoltaic upper support. Several connecting bolts are pre-embedded evenly on each pile positioning platform. The bottom of the pile is provided with a connecting ring plate, and the connecting ring plates of several piles are fixed one by one to several pile positioning platforms of the negative pressure tank by several connecting bolts. Several basic lifting rings are evenly distributed and pre-embedded in the top plate of the negative pressure tank; The construction method employs a specialized hanger, which includes a hanger frame, four equipment lifting rings, several rope winding devices, and several lifting ropes. The hanger frame has a rectangular shape. The four equipment lifting rings are evenly distributed on the top surface of the hanger frame. The rope winding devices are installed on the hanger frame, and their positions correspond one-to-one with the positions of the foundation lifting rings pre-embedded in the negative pressure tank. The upper ends of the several lifting ropes are connected to the rope winding devices one-to-one, and the lower end of each rope is connected to an elastic shackle. The construction method includes the following steps: Step S1: Prefabricate the negative pressure tank, and according to the specific dimensions of the photovoltaic upper support to be installed, pre-embed several pile positioning platforms and several foundation lifting rings on the top plate of the negative pressure tank; Step S2: First, precast the piles and fix a connecting ring plate at the bottom of each pile and a connecting seat at the top of each pile. Then, hoist the piles and fix the connecting ring plate of each pile to the corresponding positioning plate on the negative pressure tank with several connecting bolts. Install all the piles on the negative pressure tank in sequence. 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. Step S4: First, connect the lifting wire rope of the lifting equipment to the four equipment lifting rings on the special hanger. The lifting equipment will then adjust the special hanger to be directly above the overall photovoltaic support frame. Several ropes will be lowered one by one through several rope winding devices until the elastic shackles at the lower ends of the ropes are connected one by one to the basic lifting rings on the negative pressure tank. 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. Step S6: First, use a crane boat to lift the overall photovoltaic support frame, and then lower the overall photovoltaic support frame into the water at the designated position; Step S7: The entire photovoltaic support frame first sinks under its own weight until it reaches a stable state. Then, several rope-reeling devices on the on-site remote control hanger automatically disengage several elastic shackles from several foundation lifting rings. Several lifting ropes are then retrieved and lifted off the special hanger. Then, the negative pressure tank drains water and continues to sink until the entire photovoltaic support frame sits on the bottom of the water.

2. The construction method of the integral negative pressure barrel-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.

3. The construction method of the integral negative pressure barrel-type floating photovoltaic support frame according to claim 1, characterized in that, When performing step S2, the pile and the negative pressure tank may be prefabricated as a whole.

4. The construction method of the integral negative pressure barrel-type floating photovoltaic support frame according to claim 1, characterized in that, When performing step S3, the upper photovoltaic support frame is preferably manufactured in the same prefabrication yard as the prefabricated negative pressure tank.

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