Construction method of fabricated overwater photovoltaic foundation

Abstract

The invention discloses a construction method of an assembly type water photovoltaic foundation. The assembly type water photovoltaic foundation comprises two foundation structures. Each foundation structure comprises a beam plate structure, a row of piles installed on the beam plate structure and a plurality of pairs of foundation hanging rings. According to the construction method, two hanging brackets are adopted, and each hanging bracket comprises a hanging beam, a plurality of pile clamping frames, a plurality of pairs of rope collecting devices and a plurality of pairs of hanging ropes. The hanging bracket is adjusted to the position over a foundation structure, 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 foundation hanging ring; the lifting rope is wound through a rope winding device, so that the top of the pile column is inserted into the pile clamping frame, and then the foundation structure is put into the water bottom; then the elastic shackle and the foundation hanging ring are automatically unhooked through the rope collecting device, the hanging rope is collected, then the other foundation structure is placed into the water bottom through the other hanging bracket, the two hanging brackets are connected into a whole through a plurality of pieces of profile steel, and therefore the relative positions of the two foundation structures are adjusted. The installation precision of the photovoltaic upper support can be improved.

Description

TECHNICAL FIELD

[0001] The application relates to a construction method of an assembled water photovoltaic foundation. BACKGROUND

[0002] With the transformation of global energy structure to clean, water photovoltaic technology has become a research hotspot in the field of new energy due to its obvious advantages. Compared with land photovoltaic system, water photovoltaic has the advantages of rich resources, no obstruction on water surface, high reflection, low temperature rise loss, close to load center and less dust. The current water photovoltaic support frame has a floating type and a pile foundation fixed type. The pile foundation fixed type photovoltaic support frame comprises a photovoltaic upper support and four or six piles arranged on water. The photovoltaic upper support is a truss structure and comprises a photovoltaic platform and four or six supporting legs connected to the bottom of the photovoltaic platform. The bottom of each supporting leg is provided with a fulcrum seat, and the top surface of the photovoltaic platform is provided with a photovoltaic panel. The height of the first two or the first three supporting legs in the four or six supporting legs is greater than that of the last two or the last three supporting legs. The top of each of the four or six piles is provided with a connecting seat for one-to-one corresponding docking with the four or six fulcrum seats, so that the photovoltaic platform is inclined at an angle of 15° in a manner that the front is higher than the rear. Commonly used pile foundations mainly include steel pipe piles and prestressed concrete pipe piles. The type of pile is mainly selected and determined according to factors such as geological conditions, construction conditions and engineering cost. The installation of the photovoltaic upper support has high positioning accuracy requirements for the pile foundation. However, due to the limitation of site equipment and construction environment, the pile position deviation is difficult to control within an acceptable range, thereby causing installation difficulties. SUMMARY

[0003] The purpose of the present application is to overcome the defects of the prior art and provide a construction method of an assembled water photovoltaic foundation, which can facilitate the installation of the photovoltaic upper support and improve the construction quality.

[0004] The purpose of the present application is achieved by a construction method of an assembled water photovoltaic foundation, which comprises two foundation structures for supporting a photovoltaic upper support; the photovoltaic upper support is a truss structure and comprises a photovoltaic platform, two rows of supporting legs connected to the bottom of the photovoltaic platform in front and back, two rows of fulcrum seats installed on the bottom of the two rows of supporting legs in one-to-one correspondence, and a photovoltaic panel installed on the top of the photovoltaic platform.

[0005] Each of the foundation structures comprises a beam plate structure, a row of pile columns and a plurality of pairs of foundation lifting rings; wherein,

[0006] A row of pile column positioning tables are reserved on the middle part of the top surface of the beam plate structure, and the planar arrangement positions of the pile column positioning tables correspond to the planar arrangement positions of each row of fulcrum seats of the photovoltaic upper support in one-to-one correspondence; a plurality of connecting bolts are pre-buried on each pile column positioning table.

[0007] A connecting ring plate is provided at the bottom of each pile column; the connecting ring plates of a row of pile columns are connected to a row of pile column positioning platforms of the beam-slab structure one by one through a plurality of connecting bolts;

[0008] Several pairs of foundation lifting rings are pre-buried on the top surface of the beam-slab structure, and each pair of foundation lifting rings is located on the front and rear sides of each pile positioning platform in a one-to-one correspondence;

[0009] The construction method adopts two hangers, each of which includes a hanging beam, several pile clamps, two equipment lifting rings, several pairs of rope collection devices and several pairs of ropes; the hanging beam is a hollow quadrangular prism truss structure, and the inner spacing of the two upper chords of the hanging beam or the inner spacing of the two lower chords is adapted to the outer diameter of the pile column; several pile clamps are fixed on the hanging beam in a one-to-one correspondence with a row of pile column positioning platforms on the beam-slab structure, and each pile clamp includes two cross bars that are vertically fixed to the two upper chords of the hanging beam and have a length greater than the width of the hanging beam, and two cross bars that are one-to-one connected across the two cross bars. The connecting rod between the two ends of the rod and four diagonal bracing rods are connected one-to-one between the bottom surfaces of the two connecting rods and the outer sides of the two lower chords of the hanging beam; the inner spacing of the two cross bars is the same as the inner spacing of the two upper chords, so that the two cross bars and the two upper chords form a pile socket; two equipment lifting rings are installed one-to-one on the top surfaces of the two ends of the hanging beam; several pairs of rope collection devices are installed one-to-one on the two connecting rods of several pile clamps; the upper ends of several pairs of lifting ropes are connected one-to-one to several pairs of rope collection devices, and the lower end of each lifting rope is connected to an elastic shackle;

[0010] The construction method comprises the following steps:

[0011] Step S1: prefabricate the beam-slab structure, and reserve a row of pile positioning platforms on the top surface of the beam-slab structure according to the specific size of the photovoltaic upper support to be installed, and pre-embed several pairs of foundation lifting rings;

[0012] Step S2: Prefabricate the piles, fix a connecting ring plate at the bottom of each pile, and fix 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 pile positioning platform on the beam-slab structure with a number of connecting bolts. Install all the piles on the beam-slab structure in sequence.

[0013] Step S3: First, connect the lifting wire rope of the lifting equipment to two equipment lifting rings on a hanger. The hanger is lifted by the lifting equipment to the top of a foundation structure. The pairs of lifting ropes are lowered one by one by remotely controlling the pairs of rope retracting devices on site until the elastic shackles at the lower ends of the pairs of lifting ropes are connected one by one to the pairs of foundation lifting rings on the foundation structure. The pairs of lifting ropes are reeled in one by one by remotely controlling the pairs of rope retracting devices on site until the tops of a row of piles on the foundation structure are inserted one by one into the pile receptacles of the pile clamps on the hanger.

[0014] Step S4: lifting the integrated crane and foundation structure together to the transport ship by the lifting equipment, and transporting to the project construction site by the transport ship;

[0015] Step S5: after the water bottom foundation is leveled at the project construction site, the integrated crane and foundation structure are lifted by the crane ship, and a pair of rope collecting devices on the crane are remotely controlled on site to correspondingly lower a pair of hoisting ropes, so that a row of pile columns on the corresponding foundation structure are correspondingly separated from the pile column insertion holes of a plurality of pile clamping frames on the crane, a pair of elastic shackles are automatically unhooked from a plurality of foundation rings by a pair of rope collecting devices on the crane, and the pair of hoisting ropes are recovered;

[0016] Step S6: another foundation structure is installed by using another crane in the same way as steps S3 to S5 and taking the installed foundation structure as a base point;

[0017] Step S7: a plurality of steel bars are correspondingly connected between a plurality of pile clamping frames of two cranes, so that the two cranes are integrated to further adjust the relative positions of the two foundation structures;

[0018] Step S8: when the relative positions of the two foundation structures meet the installation requirements of the photovoltaic upper support, the steel bars connected between the two cranes are removed, and the two cranes are removed by the crane ship;

[0019] Step S9: the photovoltaic upper support is hoisted to the top surface of the two rows of pile columns of the two foundation structures by the crane ship, so that the two rows of supports on the photovoltaic upper support are correspondingly butted with the connecting seats at the top of the two rows of pile columns.

[0020] The above-mentioned construction method for assembling the photovoltaic foundation on water, wherein the beam slab structure is a solid beam slab structure with beams or a hollow box beam slab structure with beams.

[0021] The construction method for assembling the photovoltaic foundation on water has the following characteristics:

[0022] 1) two beam slab structures are used as foundation structures, and the pile columns are installed on the beam slab structures in the prefabrication yard, so that the installation precision is high and meets the installation requirements of the upper photovoltaic support;

[0023] 2) the pile clamping frames are arranged on the crane, which can clamp the pile columns when the foundation structure is hoisted, thereby increasing the overall stability when the foundation structure is hoisted;

[0024] 3) the elastic shackles are arranged at the lower ends of the hoisting ropes, and the top of the hoisting ropes is connected to the rope collecting device, so that the hoisting ropes can be automatically unhooked and recovered;

[0025] 4) After the operation period, the infrastructure can be lifted off the project site, leaving no components in the sea area;

[0026] 5) Whether it is construction impact or recycling of infrastructure, it is conducive to environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the side view of the photovoltaic upper support involved in the construction method of the fabricated water photovoltaic foundation of the present application;

[0028] Figure 2 is the plan view of the beam slab structure in the fabricated water photovoltaic foundation of the present application;

[0029] Figure 2a is the cross-sectional view of one kind of beam slab structure in the fabricated water photovoltaic foundation of the present application;

[0030] Figure 2b is the cross-sectional view of another kind of beam slab structure in the fabricated water photovoltaic foundation of the present application;

[0031] Figure 3 is the plan view of the lifting frame used in the construction method of the fabricated water photovoltaic foundation of the present application;

[0032] Figure 4 is the elevation view of the lifting beam in the lifting frame of the present application;

[0033] Figure 5 is the state side view when step S3 of the construction method of the fabricated water photovoltaic foundation of the present application is performed;

[0034] Figure 6 is one kind of state plan view when step S7 of the construction method of the fabricated water photovoltaic foundation of the present application is performed;

[0035] Figure 7 is another kind of state plan view when step S7 of the construction method of the fabricated water photovoltaic foundation of the present application is performed. DETAILED DESCRIPTION

[0036] The present application will be further described below in conjunction with the drawings.

[0037] Please refer to Figures 1 to 7 The construction method of the fabricated water photovoltaic foundation of the present application involves a fabricated water photovoltaic foundation comprising two foundation structures 2 for supporting photovoltaic upper supports.

[0038] The photovoltaic upper support 1 is a truss structure and comprises a photovoltaic platform 10, two rows of supporting legs 11 connected at the bottom of the photovoltaic platform 10, two rows of fulcrum seats 12 installed at the bottom of the two rows of supporting legs 11 in one-to-one correspondence, and a photovoltaic panel installed at the top of the photovoltaic platform 10. The number of supporting legs 11 in each row is at least two, and the number of supporting legs 11 in each row in the embodiment is two.

[0039] Each foundation structure 2 comprises a beam slab structure 2A, two piles 2B, and two pairs of foundation lifting rings 2C;

[0040] The beam slab structure 2A (see Figure 2 ) is a solid-beam beam slab structure or a hollow-beam beam slab structure; the solid-beam beam slab structure comprises a solid bottom plate 20 and two horizontal ribs 21 and a plurality of vertical ribs 22 fixed on the top surface of the solid bottom plate 20 (see Figure 2a ); the hollow-beam beam slab structure comprises a hollow bottom plate 20' and two horizontal ribs 21 and a plurality of vertical ribs 22 fixed on the top surface of the hollow bottom plate 20'; the solid bottom plate 20 and the hollow bottom plate 20' are thick in the middle and thin at the front and rear edges (see Figure 2b );

[0041] Two pile positioning tables 23 are reserved in the middle of the top surface of the beam slab structure 2A, i.e., in the middle of the two vertical ribs 22, in a row, and the planar arrangement positions of the two pile positioning tables 23 correspond to the planar arrangement positions of the two fulcrum seats 12 of each row of fulcrum seats of the photovoltaic upper support 1 in one-to-one correspondence, and each pile positioning table 23 is preferably located at the position of the horizontal rib 21; a plurality of connecting bolts 24 are pre-buried on each pile positioning table 23;

[0042] The pile 2B adopts a prestressed concrete pipe pile or a prefabricated column; the bottom of each pile 2B is provided with a connecting ring plate, a plurality of mounting holes corresponding to the plurality of connecting bolts 24 pre-buried on each pile positioning table 23 are uniformly arranged on the circumference of the connecting ring plate; and the connecting ring plates of the two piles 2B are fixed on the two pile positioning tables 23 of the beam slab structure 2A in one-to-one correspondence through the plurality of connecting bolts 24, respectively;

[0043] The two pairs of foundation lifting rings 2C are pre-buried on the top surface of the beam slab structure 2A, and each pair of foundation lifting rings 2C is located on the front side and the rear side of each pile positioning table 23 in one-to-one correspondence; each pair of foundation lifting rings 2C is preferably located on the vertical rib 22.

[0044] The construction method of the application adopts two hangers 3, each of which comprises a hoisting beam 3A, two pile clamping frames 3B, two equipment lifting rings 3C, two pairs of rope collecting devices 3D and two pairs of lifting ropes 30; wherein the hoisting beam 3A is a hollow four-prism truss structure and comprises two upper chords 301, two lower chords 302, a plurality of straight web members 303 and inclined web members 304 connected between the upper chords 301 and the lower chords 302, and a horizontal tie member 305 connected between the two upper chords 301 and the two lower chords 302; the inner distance of the two upper chords 301 or the inner distance of the two lower chords 302 of the hoisting beam 3A is matched with the outer diameter of the pile 2B; the two pile clamping frames 3B are fixed on the hoisting beam 3A in one-to-one correspondence with the two pile positioning tables 23 on the beam slab structure 2A, each pile clamping frame 3B comprises two horizontal rods 31 vertically fixed on the two upper chords 301 of the hoisting beam 3A and having a length greater than the width of the hoisting beam 3A, two connecting rods 32 in one-to-one correspondence with the two ends of the two horizontal rods 31, and four inclined bracing rods 33 in one-to-one correspondence with the two ends of the two connecting rods 32 and the outer side surfaces of the two lower chords 302 of the hoisting beam 3A; the inner distance of the two horizontal rods 31 is the same as the inner distance of the two upper chords 301, so that the two horizontal rods 31 and the two upper chords 301 enclose a pile insertion hole; the two equipment lifting rings 3C are installed on the two top surfaces of the hoisting beam 3A in one-to-one correspondence; the two pairs of rope collecting devices 3D are installed on the two connecting rods 32 of the two pile clamping frames 3B in one-to-one correspondence (see Figure 3 and Figure 4 ); the upper ends of the two pairs of lifting ropes 30 are connected with the two pairs of rope collecting devices 3D in one-to-one correspondence, and the lower end of each lifting rope 30 is connected with an elastic shackle 3E.

[0045] The construction method of the fabricated water-based photovoltaic foundation of the application comprises the following steps:

[0046] Step S1: prefabricate the beam slab structure 2A, and reserve a row of pile positioning tables 23 on the top surface of the beam slab structure 2A according to the specific size of the photovoltaic upper support 1 to be installed, and pre-bury two pairs of foundation lifting rings 2C;

[0047] Step S2: first, prefabricate the pile 2B, and fix a connecting ring plate on the bottom of each pile 2B and a connecting seat on the top of each pile 2B, then hoist the pile 2B, and fix and connect the connecting ring plate of each pile 2B with the corresponding pile positioning table 23 on the beam slab structure 2A through a plurality of connecting bolts 24; sequentially install all the piles 3B on the beam slab structure 2A to form the foundation structure 2;

[0048] Step S3: First, connect the lifting wire of the lifting equipment with the two equipment lifting rings 2C on the hanger 3, and then use the lifting equipment to lift the hanger 3 to the top of the foundation structure 2. Then, remotely control the two pairs of rope winding devices 3D on the hanger 3 to correspondingly lower the two pairs of lifting ropes 30 until the elastic shackles 3E at the lower ends of the two pairs of lifting ropes 30 are correspondingly connected with the two pairs of foundation lifting rings 2C on the foundation structure 2. Then, remotely control the two pairs of rope winding devices 3D to correspondingly wind the two pairs of lifting ropes 30 until the top of the two pile columns 2B on the foundation structure 2 are correspondingly inserted into the pile column insertion holes of the two pile column clamping frames 3B on the hanger 3 (see Figure 5 );

[0049] Step S4: Use the lifting equipment to lift the integrated hanger 3 and foundation structure 2 to the transport ship, and then transport it to the project construction site by the transport ship.

[0050] Step S5: After the water bottom foundation is leveled at the project construction site, first use the crane ship to lift the integrated hanger 3 and foundation structure 2, and then remotely control the two pairs of rope winding devices 3D on the hanger 3 to correspondingly lower the two pairs of lifting ropes 30 at the designated position, so that a row of pile columns on the corresponding foundation structure 2 are correspondingly separated from the pile column insertion holes of the two pile column clamping frames 3B on the hanger 3. Continue to lower the two pairs of lifting ropes 30 on the hanger 3 to lower the corresponding foundation structure 2 into the water until the corresponding foundation structure 2 is seated on the water bottom foundation. Then, remotely control the two pairs of rope winding devices 3D on the hanger 3 to correspondingly automatically unhook the two pairs of elastic shackles 3E from the two pairs of foundation lifting rings 2C, and then recover the two pairs of lifting ropes 30 on the hanger 3.

[0051] Step S6: Use another hanger 3 to install another foundation structure 2 in the same way as steps S3 to S5, and take the already installed foundation structure 2 as the base point.

[0052] Step S7: Correspondingly connect two steel profiles 4 between the two pile column clamping frames 3B of the two hangers 3 (see Figure 6 ), so that the two hangers 3 are integrated to further adjust the relative positions of the two foundation structures 2 (see Figure 7 ), and at the same time, increase the stability of the two foundation structures 2 and improve the ability to resist wave flow.

[0053] Step S8: When the relative positions of the two foundation structures 2 meet the installation requirements of the photovoltaic upper support 1, first remove the two steel profiles 4 connected between the two hangers 3, and then use the crane ship to remove the two hangers 3.

[0054] S9: Use the crane ship to lift the photovoltaic upper support 1 to the top surface of the two rows of pile columns 2B of the two foundation structures 2, so that the two rows of supports 12 on the photovoltaic upper support 1 are correspondingly connected with the connecting seats on the top of the two rows of pile columns 2B.

[0055] When the photovoltaic project expires, the photovoltaic upper support 1 is removed first, and then the two foundation structures 2 are lifted away for maintenance and then reused.

[0056] The above examples are only for illustrating the present application, and are not a limitation of the present application. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present application, and all equivalent technical solutions should belong to the scope of the present application, which should be limited by the claims.

Claims

1. A construction method for an assembled water-based photovoltaic foundation, wherein the assembled water-based photovoltaic foundation comprises two foundation structures for supporting an upper photovoltaic support; the upper photovoltaic support is a truss structure and comprises a photovoltaic platform, two rows of legs connected to the bottom of the photovoltaic platform in a front-to-rear manner, two rows of support seats correspondingly mounted at the bottom of the two rows of legs, and a photovoltaic panel mounted on the top of the photovoltaic platform; characterized in that: Each of the foundation structures comprises a beam-slab structure, a row of piles and several pairs of foundation lifting rings; A row of pile column positioning platforms is reserved on the middle of the top surface of the beam-slab structure, and the plane layout positions of the row of pile column positioning platforms correspond one to one with the plane layout positions of each row of support seats of the photovoltaic upper support; a number of connecting bolts are embedded in each pile column positioning platform; A connecting ring plate is provided at the bottom of each pile column; the connecting ring plates of a row of pile columns are connected to a row of pile column positioning platforms of the beam-slab structure one by one through a plurality of connecting bolts; Several pairs of foundation lifting rings are pre-buried on the top surface of the beam-slab structure, and each pair of foundation lifting rings is located on the front and rear sides of each pile positioning platform in a one-to-one correspondence; The construction method adopts two hangers, each of which includes a hanging beam, several pile clamps, two equipment lifting rings, several pairs of rope collection devices and several pairs of ropes; the hanging beam is a hollow quadrangular prism truss structure, and the inner spacing of the two upper chords of the hanging beam or the inner spacing of the two lower chords is adapted to the outer diameter of the pile column; several pile clamps are fixed on the hanging beam in a one-to-one correspondence with a row of pile column positioning platforms on the beam-slab structure, and each pile clamp includes two cross bars that are vertically fixed to the two upper chords of the hanging beam and have a length greater than the width of the hanging beam, and two cross bars that are one-to-one connected across the two cross bars. The connecting rod between the two ends of the rod and four diagonal bracing rods are connected one-to-one between the bottom surfaces of the two connecting rods and the outer sides of the two lower chords of the hanging beam; the inner spacing of the two cross bars is the same as the inner spacing of the two upper chords, so that the two cross bars and the two upper chords form a pile socket; two equipment lifting rings are installed one-to-one on the top surfaces of the two ends of the hanging beam; several pairs of rope collection devices are installed one-to-one on the two connecting rods of several pile clamps; the upper ends of several pairs of lifting ropes are connected one-to-one to several pairs of rope collection devices, and the lower end of each lifting rope is connected to an elastic shackle; The construction method comprises the following steps: Step S1: prefabricate the beam-slab structure, and reserve a row of pile positioning platforms on the top surface of the beam-slab structure according to the specific size of the photovoltaic upper support to be installed, and pre-embed several pairs of foundation lifting rings; Step S2: Prefabricate the piles, fix a connecting ring plate at the bottom of each pile, and fix 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 pile positioning platform on the beam-slab structure with a number of connecting bolts. Install all the piles on the beam-slab structure in sequence. Step S3: First, connect the lifting wire rope of the lifting equipment to two equipment lifting rings on a hanger. The hanger is lifted by the lifting equipment to the top of a foundation structure. The pairs of lifting ropes are lowered one by one by remotely controlling the pairs of rope retracting devices on site until the elastic shackles at the lower ends of the pairs of lifting ropes are connected one by one to the pairs of foundation lifting rings on the foundation structure. The pairs of lifting ropes are reeled in one by one by remotely controlling the pairs of rope retracting devices on site until the tops of a row of piles on the foundation structure are inserted one by one into the pile receptacles of the pile clamps on the hanger. Step S4: hoisting the integrated hanger and foundation structure onto a transport ship by means of lifting equipment, and transporting the hanger and foundation structure to the project construction site by means of the transport ship; Step S5: After the underwater foundation is leveled at the project construction site, the connected hanger and foundation structure are first lifted using a crane vessel. At a designated location, several pairs of lifting ropes are lowered one by one into the ground using several pairs of rope-collecting devices on the remote-controlled hanger, so that a row of piles on the corresponding foundation structure are respectively released from the pile-column sockets of several pile clamps on the hanger. The several pairs of lifting ropes on the hanger are then lowered to lower the corresponding foundation structure into the water until the foundation structure rests on the underwater foundation. The several pairs of rope-collecting devices on the remote-controlled hanger are then automatically unhooked one by one from the several pairs of elastic shackles and the several pairs of foundation lifting rings, and the several pairs of lifting ropes on the hanger are then recovered. Step S6: Using another hanger and using the same method as steps S3 to S5, install another foundation structure with the already installed foundation structure as a base point; Step S7: using several steel sections to connect between the several pile clamps of the two hangers in a one-to-one correspondence, so that the two hangers are connected as one, so as to further adjust the relative positions of the two foundation structures; Step S8: When the relative positions of the two foundation structures meet the installation requirements of the photovoltaic upper bracket, several steel sections connected between the two hangers are removed, and then the two hangers are removed by a crane ship; Step S9: hoist the photovoltaic upper bracket to the top surface of the two rows of piles of the two foundation structures by a crane ship, so that the two rows of supports on the photovoltaic upper bracket are docked with the connecting seats on the top of the two rows of piles in a one-to-one correspondence.

2. The construction method for assembling a water photovoltaic foundation according to claim 1, characterized in that: The beam-slab structure is a solid beam-slab structure with beams or a hollow box-type beam-slab structure with beams.

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