Offshore photovoltaic pile stabilizing platform and method suitable for multiple pile positions

Abstract

The invention provides an offshore photovoltaic pile stabilizing platform and method suitable for multiple pile positions, and relates to the technical field of offshore photovoltaic pile stabilizing device.The offshore photovoltaic pile stabilizing platform comprises a supporting frame, a pile position adjusting assembly is carried on the supporting frame and has the telescopic and 360-degree rotating functions, the pile position adjusting assembly is connected with a pile gripper, and the pile stabilizing platform is further provided with a balance system and a control system; under the assistance of the pile position adjusting assembly, the pile gripper can carry out high-precision positioning and pile sinking of photovoltaic platform supporting piles and cable supporting piles, the balance system adjusts the stress state of the pile stabilizing platform through seawater buoyancy, the influence of eccentric loads on construction precision is avoided, and construction safety is guaranteed. The device has the beneficial effects that the device flexibly adapts to different pile positions of photovoltaic platform supporting piles and cable supporting piles, it is ensured that the contact pressure between the supporting shoes and sea mud is equal, the influence of differential settlement on the pile foundation perpendicularity is reduced, and the device is high in positioning speed, high in precision, high in applicability and easy to popularize.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic pile stabilizing equipment, and particularly to an offshore photovoltaic pile stabilizing platform and method adaptable to multiple pile positions. Background Art

[0002] At present, a number of offshore photovoltaic projects in the near-shallow sea areas along the eastern coast of China have entered the construction stage. The relevant marine photovoltaic structure system is mainly a pile foundation fixed platform structure, that is, a large photovoltaic platform is jointly supported by 4 piles. In order to meet the accuracy requirements of offshore pile foundation positioning and verticality, offshore pile sinking generally uses a 4-pile fixed pile stabilizing platform for assistance. This kind of pile stabilizing platform is provided with 1 fixed pile gripper at each of the four corner points of the rectangular frame, and has a high control accuracy for the relative positions of the 4 piles. However, the following problems are encountered during the construction process.

[0003] 1. Since the positioning of the 4-pile fixed pile stabilizing platform determines the positioning of the 4 piles, this requires the pile stabilizing platform to have a very high positioning accuracy. Whether it is placed by a crane or in the process of self-floating positioning, the process is very complicated. 2. Generally, the seabed in the near-shallow sea areas has relatively thick silt. For a pile stabilizing platform that sits on the sea mud by its own weight, it is easy to tilt and move under the action of sea currents, seawater buoyancy, and unbalanced pile sinking construction forces, resulting in the pile foundation accuracy not meeting the requirements; for a pile stabilizing platform fixed by positioning piles, the construction of positioning pile sinking and pulling out is complicated and the efficiency is low. 3. In offshore photovoltaic projects, there are not only pile foundations for supporting photovoltaic platforms, but also cable support piles near the photovoltaic platforms, which are used to support the cross-connecting cables between photovoltaic platforms. The construction of these pile foundations also requires a pile stabilizing platform. However, the existing 4-pile fixed pile stabilizing platform is restricted by construction space, construction efficiency, etc. and is not applicable to the construction of cable support piles.

[0004] How to solve the above technical problems is the topic faced by the present invention. Summary of the Invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides an offshore photovoltaic pile stabilizing platform and method adaptable to multiple pile positions, which can flexibly adapt to different pile positions of photovoltaic platform support piles and cable support piles, ensure that the contact pressure between the support boots and the sea mud is equal, reduce the influence of uneven settlement on the verticality of the pile foundation, have a fast positioning speed, high accuracy, strong practicability, and are easy to promote.

[0006] The technical solution adopted by the present invention to solve its technical problems is: The present invention provides an offshore photovoltaic pile stabilizing platform and method adaptable to multiple pile positions. Each photovoltaic platform is supported by steel pipe piles. The centroid connection lines of the cross-sections of the 4 steel pipe piles form a rectangle. In addition, each photovoltaic platform is also connected to a cable support steel pipe pile. The pile stabilizing platform includes a support frame, and a pile position adjustment component is mounted on the support frame, which has telescopic and 360° rotation functions. The pile position adjustment component is connected to a pile gripper; The pile stabilizing platform is also provided with a balance system and a control system. With the assistance of the pile clamping device and the pile position adjusting assembly, high-precision positioning and pile driving of the support piles of the photovoltaic platform and the cable support piles can be implemented. The balance system adjusts the stress state of the pile stabilizing platform by using the buoyancy of seawater, avoids the influence of eccentric load on the construction precision, and ensures the construction safety.

[0007] The support frame is a double-layer steel truss structure, including an upper frame, a lower frame, legs and connecting rods. Both the upper frame and the lower frame are rectangular frames. There are 4 legs, which are fixedly connected at the corners of the upper frame and the lower frame respectively, forming the basic frame of the cuboid pile stabilizing platform. A number of vertical rods are arranged between the upper frame and the lower frame. Reinforced cross rods are respectively arranged on the upper frame and the lower frame. In the middle of the upper frame, a support structure is formed by the cross rods to support the pile position adjusting system.

[0008] A first oil cylinder is arranged at the bottom end of each leg. The telescopic end of the first oil cylinder is connected to a support shoe, which is in direct contact with the sea mud. Through the telescopic movement of the first oil cylinder, the levelness of the support frame is adjusted, and the height of the pile stabilizing platform exposed above the sea surface is adjusted. The pile position adjusting assembly includes a base, a chassis, an annular track, a fixed arm, a telescopic arm, a vertical arm and a leveling mechanism. The base is a circular structure, fixedly connected to the middle of the upper frame. The upper part of the base is rotatably connected to the circular chassis, and 360° rotation is realized through motor driving and gear transmission. The annular track is coaxially arranged with the chassis and fixedly connected to the upper frame. The track surface of the annular track is parallel to the upper surface of the chassis. The fixed arm and the telescopic arm are of an integral structure. The fixed arm is rotatably connected in the vertical plane at the center position of the chassis and is arranged on the annular track through the leveling mechanism. The vertical arm forms a 90° angle with the telescopic arm and is fixedly connected to the end of the telescopic arm, connecting the pile clamping device. The leveling mechanism includes a first sliding head, a second oil cylinder and a second sliding head. The first sliding head and the second sliding head are respectively slidably and cooperatively connected to the annular track and the fixed arm. The second oil cylinder levels the fixed arm through telescopic movement. There are two pile clamping devices. Each pile clamping device is composed of an annular clamping hoop and 4 third oil cylinders evenly distributed circumferentially on the clamping hoop. The telescopic end of each third oil cylinder is fixedly installed with a curved guiding piece. The two hoop fasteners are coaxially arranged and fixedly connected to the vertical arm from top to bottom at an interval of 2 m in sequence, and the upper end face of the hoop fastener is perpendicular to the axis of the hoop fastener; The spatial trajectory formed by the axis of the hoop fastener during the rotation of the fixed arm is always in a plane, so as to ensure that after the base is leveled, the leveling of the pile gripper can be further implemented.

[0009] The guiding piece is pushed towards the center of the hoop fastener by the third oil cylinder and fixed when reaching an appropriate position, so as to realize the vertical control and guiding construction of the pile foundation.

[0010] In terms of positioning, the pile gripper is adapted to various pile foundation positions through the 360° rotation of the chassis and the axial telescoping of the telescopic arm; In terms of leveling, the chassis is leveled by the first oil cylinder, and the telescopic arm is leveled by the leveling mechanism, and finally the end face of the pile gripper is horizontal.

[0011] The balance system includes a number of water tanks, a number of vertical slide rails and a number of fourth oil cylinders; Each water tank is provided with two vertical slide rails and two fourth oil cylinders, and forms a balance unit, and each balance unit is installed inside the corner of the support frame; The water tank is of a cuboid structure and is provided with an opening at the upper part, and the water tank is slidably connected to the support frame through the vertical slide rail; The telescopic end of the fourth oil cylinder is hinged to the bottom of the water tank, and the fixed end is fixedly connected to the upper layer frame; The water tank can be lifted and lowered under the action of the fourth oil cylinder to change the volume immersed in seawater, and the force on the pile stabilizing platform is adjusted through the change of buoyancy. Water can also be injected into or pumped out of the water tank through the opening of the water tank, thereby changing the adjustment effect of the balance system.

[0012] The control system includes a computer, decision-making software, a satellite positioning device, a horizontal sensor, an angular displacement sensor, a water level sensor and a displacement sensor; The satellite positioning device is used to measure the central coordinates of the chassis of the pile stabilizing platform. There are several horizontal sensors, which are respectively arranged on the chassis and the upper end face of the pile gripper and feed back the horizontal state to the computer; The angular displacement sensor is arranged at the axis center of the chassis and feeds back the rotation angle to the computer; There are multiple water level sensors, which are respectively arranged inside the water tank and feed back the water level to the computer; The displacement sensor is arranged on the vertical arm and feeds back the extension amount of the telescopic arm to the computer; The decision-making software, on the one hand, decides through the computer the amount of water injected into or withdrawn from the water tank, the lifting displacement of the water tank, and issues instructions to the relevant oil cylinders to ensure that the pressures of the four support shoes of the pile stabilizing platform on the sea mud are equal; on the other hand, it decides through the computer the telescopic amounts of the first oil cylinder, the second oil cylinder, the telescopic arm, and the rotation amount of the chassis, and issues instructions to the relevant oil cylinders and motors to make the end face of the pile gripper horizontal and achieve precise positioning of the pile foundation; it also decides the telescopic amount of the third oil cylinder and issues instructions to the relevant oil cylinders to ensure the verticality control of the pile foundation.

[0013] A method for an offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions includes the following steps: S1. Set the pile stabilizing platform to the initial state: The fixed arm is perpendicular to the long side of the upper frame, and the telescopic arm is in the retracted state; All the first oil cylinders, second oil cylinders, and third oil cylinders are set to the retracted state; All the fourth oil cylinders are set to the retracted state; According to the average water level in the construction sea area, with the principle that when the water tank is lifted to the highest state, the water level in the water tank is consistent with the sea level, determine the water injection height in the water tank, further calculate the water injection height of the water tank required for the force balance adjustment of the pile stabilizing platform, and finally determine that the water injection height in the water tank meets the requirements; All the fourth oil cylinders on the side away from the pile gripper are set to the retracted state, that is, the water tank is lifted to the highest, and the fourth oil cylinders on the side close to the pile gripper determine the extension amount of the telescopic end according to the calculation. The calculation basis is that when the pile stabilizing platform in the initial state is placed in the sea water, the pressures of the support shoes on the sea mud are equal; in this way, the pressures of the support shoes of the pile stabilizing platform on the sea mud after entering the water can be maximized, forming sufficient initial mud settlement and greatly reducing the settlement increment of the support shoes during the subsequent construction process; S2. Place the photovoltaic platform on the seabed in the piling sea area through the shipboard crane, and make the pile stabilizing platform located at the center of the rectangle surrounded by the support piles of the photovoltaic platform, and the long side of the support frame of the pile stabilizing platform is roughly parallel to the long side of the rectangle surrounded by the 4 piles; S3. Under the assistance of the control system, start the first oil cylinder to make the height of the pile stabilizing platform exposed above the sea surface meet the construction requirements and make the chassis in a horizontal state; Start the second oil cylinder to make the upper end face of the clamp horizontal, and then the axes of all the clamps reach the vertical state; S4. According to the information fed back by each sensor, calibrate the initial states of the water tank, chassis, telescopic arm, and clamp in the decision-making software, and read the coordinates of the center of the chassis; S5. With the assistance of the control system, based on the pile position coordinates, the chassis center coordinates, and the position of the water tank, determine whether the water tank obstructs the rotation of the telescopic boom, calculate the rotation amount of the chassis and the telescopic amount of the telescopic boom, and transmit the instructions to the relevant motors and cylinders to accurately position the pile gripper on the pile foundation; S6. With the assistance of the control system, calculate the pressure of the support boots of the pile stabilizing platform on the sea mud under the action of its own weight, seawater buoyancy, and construction accidental loads, and then calculate the displacement values of the lifting of each water tank according to the equal pressure of the support boots on the sea mud, and then adjust the position of the water tank in place; Taking the center of the chassis as the origin, and taking the directions parallel and perpendicular to the long side of the support frame 1 as the X and Y axes respectively, calculate the positions of each water tank in the vertical direction according to the following method, and adjust through the fourth cylinder; Step 1. Taking the X and Y axes as the boundaries, lift the water tanks on the side away from the hoop to the highest point; Step 2. Keep the position of the water tanks on the side away from the hoop unchanged in the vertical direction, and take the moment about the X axis as 0; Step 3. Keep the total buoyancy provided by the water tanks on both sides of the X axis equal, and adjust the positions of each water tank in the vertical direction to make the moment about the Y axis 0; Step 4. If the execution of Step 3 fails, then the water tanks on the side away from the hoop in Step 1 are lowered by a certain limit value from the highest point, and then the subsequent steps are executed, and this process is repeated until the adjustment is completed.

[0014] S7. With the assistance of the control system, start the third cylinder to make the guide piece push towards the center of the hoop and reach an appropriate position; S8. Carry out pile driving construction according to other technical solutions for pile foundation driving.

[0015] The beneficial effects of the present invention are as follows: When the pile stabilizing platform is placed from the crane to the seabed, precise positioning is not required, and the requirements can be met relying on the technical experience of the crane driver, with high efficiency; The precise positioning of the pile foundation is implemented by the control system and related actuators, with high precision and high efficiency; it can flexibly adapt to the position of the pile foundation, realize the sharing of the photovoltaic platform support piles and the cable support piles, and solve the drawback that the traditional pile stabilizing platform is not suitable for cable support piles; By adjusting the force balance, the pressure of the support boots on the sea mud is made equal, greatly reducing the influence of uneven settlement on the verticality of the pile foundation; This device is practical and easy to promote, and has high application value. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the pile driving state of the present invention.

[0017] Figure 2 is Figure 1 The partial enlarged schematic diagram of A of

[0018] Figure 3 For Figure 1 Partial enlarged schematic view of area B.

[0019] Figure 4 Pile foundation layout diagram of the photovoltaic platform of the present invention.

[0020] Figure 5 Schematic three-dimensional structure diagram of the initial state of the present invention.

[0021] Among them, the reference numerals are: 1, support frame; 11, upper frame; 12, lower frame; 13, leg; 14, vertical rod; 15, cross bar; 16, first oil cylinder; 2, pile position adjusting assembly; 21, base; 22, chassis; 23, annular track; 24, fixed arm; 25, telescopic arm; 26, vertical arm; 27, leveling mechanism; 271, first sliding head; 272, second oil cylinder; 273, second sliding head; 3, pile gripper; 31, collar; 32, third oil cylinder; 33, guide plate; 4, balance system; 41, water tank; 42, opening; 43, vertical slide rail; 44, fourth oil cylinder; 51, photovoltaic platform support pile; 52, cable support pile. Detailed implementation manners

[0022] To clearly illustrate the technical features of this solution, the following elaborates on this solution through specific implementation manners.

[0023] Refer to Figures 1 to 5 As shown, this embodiment is an offshore photovoltaic pile stabilizing platform and method adaptable to multiple pile positions. Each photovoltaic platform is supported by 4 steel pipe piles with a pile diameter of 0.9 m, and the spacings are 35 m and 21 m respectively. That is, the connecting lines of the centroids of the cross-sections of the 4 steel pipe piles form a rectangle of 35 m × 21 m. In addition, each photovoltaic platform is also connected to a cable support steel pipe pile with a pile diameter of 0.7 m. The pile stabilizing platform includes a support frame 1, and a pile position adjusting assembly 2 is mounted on the support frame 1, which has telescopic and 360° rotation functions. The pile position adjusting assembly 2 is connected to a pile gripper 3; The pile stabilizing platform is also provided with a balance system 4 and a control system. With the assistance of the pile position adjusting assembly 2, the pile gripper 3 can implement high-precision positioning and pile driving of the photovoltaic platform support pile 51 and the cable support pile 52; the balance system 4 uses the buoyancy of seawater to adjust the stress state of the pile stabilizing platform, avoid the influence of eccentric load on the construction accuracy, and ensure construction safety.

[0024] The support frame 1 is a double-layer steel truss structure, including an upper frame 11, a lower frame 12, legs 13 and connecting members; Both the upper frame 11 and the lower frame 12 are rectangular frames. There are 4 legs 13, which are fixedly connected to the corners of the upper frame 11 and the lower frame 12 respectively, forming the basic frame of the cuboid pile stabilizing platform; A number of vertical rods 14 are provided between the upper frame 11 and the lower frame 12, and reinforced cross rods 15 are respectively provided on the upper frame 11 and the lower frame 12. In the middle of the upper frame, a support structure is formed by the cross rods 15 to support the pile position adjustment system 2.

[0025] A first oil cylinder 16 is provided at the bottom end of each leg 13, and the telescopic end of the first oil cylinder 16 is connected to a support shoe, which is in direct contact with the sea mud.

[0026] Through the telescopic movement of the first oil cylinder 16, the levelness of the support frame is adjusted, and the height of the pile stabilizing platform exposed above the sea surface is adjusted. According to the average water level of 4.0 m in the construction sea area, the height of the legs is designed to be 4.0 m, and the maximum telescopic stroke of the first oil cylinder 16 is 3.0 m, which can adapt to the change of tidal water level and the leveling requirement.

[0027] The pile position adjustment assembly 2 includes a base 21, a chassis 22, an annular track 23, a fixed arm 24, a telescopic arm 25, a vertical arm 26, and a leveling mechanism 27; The base 21 is a circular structure, fixedly connected to the middle of the upper frame 11. The upper part of the base 21 is rotatably connected to the circular chassis 22, and through the drive of a motor and gear transmission, 360° rotation is realized; The annular track 23 is coaxially arranged with the chassis 22 and is fixedly connected to the upper frame 11. The track surface of the annular track 23 is parallel to the upper surface of the chassis 22; The fixed arm 24 and the telescopic arm 25 are of an integral structure. The fixed arm 24 is rotatably connected in the vertical plane at the center position of the chassis 22 and is arranged on the annular track 23 through the leveling mechanism 27; The vertical arm 26 forms a 90° angle with the telescopic arm 25 and is fixedly connected to the end of the telescopic arm 25 to connect the pile gripper 3. The leveling mechanism 27 includes a first sliding head 271, a second oil cylinder 272, and a second sliding head 273. The first sliding head 271 and the second sliding head 273 are respectively slidably and cooperatively connected to the annular track 23 and the fixed arm 24; the second oil cylinder 272 levels the fixed arm 24 through telescopic movement. 6. The offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions according to claim 5, characterized in that two pile grippers 3 are provided, and each pile gripper 3 is composed of an annular clamping hoop 31 and 4 third oil cylinders 32 evenly distributed circumferentially on the clamping hoop 31. The telescopic end of each third oil cylinder 32 is fixedly installed with a curved guiding piece 33; The two clamping hoops 31 are coaxially arranged and are fixedly connected to the vertical arm 26 from top to bottom at an interval of 2 m, and the upper end surface of the clamping hoop 31 is perpendicular to the axis of the clamping hoop 31; The spatial trajectory formed by the axis of the hoop during the rotation with the fixed arm 24 is always within a plane, ensuring that after the base is leveled, the end face of the pile gripper 3 can be further leveled, and thus the axes of all hoops 31 reach the vertical state.

[0028] The guiding piece 33 is pushed towards the center of the hoop 31 by the third oil cylinder 32 and fixed at an appropriate position to achieve the vertical control and guiding construction of the pile foundation.

[0029] In terms of positioning, through the 360° rotation of the chassis 22 and the axial expansion and contraction of the telescopic arm 25, the pile gripper 3 can adapt to various pile foundation positions. In terms of leveling, the first oil cylinder 16 is used to level the chassis 22, and the leveling mechanism 27 is used to level the telescopic arm 25, ultimately achieving the purpose of leveling the end face of the pile gripper 3.

[0030] The balance system 4 includes a number of water tanks 41, a number of vertical sliding rails 43, and a number of fourth oil cylinders 44. Each water tank 41 is provided with two vertical sliding rails 43 and two fourth oil cylinders 44, forming a balance unit, and each balance unit is installed inside the corner of the support frame 1. The water tank 41 has a cuboid structure, with an opening 42 provided at the upper part. The water tank 41 is slidably connected to the support frame 1 through the vertical sliding rails 43. The telescopic end of the fourth oil cylinder 44 is hinged to the plate body at the bottom of the water tank 41, and the fixed end is fixedly connected to the upper layer frame 11. The water tank 41 can be lifted and lowered under the action of the fourth oil cylinder 44 to change the volume immersed in seawater, and the force on the pile stabilizing platform can be adjusted through the change in buoyancy. Water can also be injected into or pumped out of the water tank 41 through the opening 42 of the water tank 41, thereby changing the adjustment effect of the balance system 4.

[0031] The control system includes a computer, decision-making software, a satellite positioning device, a level sensor, an angular displacement sensor, a water level sensor, and a displacement sensor. The satellite positioning device is used to measure the central coordinates of the chassis 22 of the pile stabilizing platform. There are several level sensors, which are respectively arranged on the chassis 22 and the upper end face of the pile gripper 3 to feedback the level state to the computer. The angular displacement sensor is arranged at the axis center of the chassis 22 to feedback the rotation angle to the computer. There are multiple water level sensors, which are respectively arranged inside the water tanks 41 to feedback the water level to the computer. The displacement sensor is arranged on the vertical arm 26 to feedback the extension amount of the telescopic arm 25 to the computer. The decision-making software, on the one hand, determines through a computer the amount of water injected into or pumped out of the water tank, the lifting and lowering displacement of the water tank, and issues commands to relevant oil cylinders to ensure that the pressures of the four support boots of the pile-stabilizing platform on the sea mud are equal; on the other hand, it determines through a computer the telescopic amounts of the first oil cylinder, the second oil cylinder, the telescopic arm, and the rotation amount of the chassis, and issues commands to relevant oil cylinders and motors to make the end face of the pile gripper horizontal and achieve precise positioning of the pile foundation; it also determines the telescopic amount of the third oil cylinder and issues commands to relevant oil cylinders to ensure the control of the verticality of the pile foundation.

[0032] A method for an offshore photovoltaic pile-stabilizing platform adaptable to multiple pile positions includes the following steps: S1. Set the pile-stabilizing platform to the initial state, as Figure 5 shown: The fixed arm 24 is perpendicular to the long side of the upper frame 11, and the telescopic arm 25 is in a contracted state; All the first oil cylinders 16, the second oil cylinders 272, and the third oil cylinders 32 are all set to the contracted state; All the fourth oil cylinders 44 are set to the contracted state, that is, the water tank 41 is in the raised state; According to the average water level of 4.0 m in the construction sea area, with the principle that when the water tank 41 is lifted to the highest state, the water level in the water tank is consistent with the sea level, determine that the water injection height in the water tank 41 is 1.0 m, and further calculate the water injection height of the water tank 41 required for the force balance adjustment of the pile-stabilizing platform. Finally, it is determined that the water injection height of 1.0 m in the water tank meets the requirements; All the fourth oil cylinders 44 on the side away from the pile gripper 3 are set to the contracted state, that is, the water tank is lifted to the highest. The fourth oil cylinders 44 on the side close to the pile gripper 3 determine the extension amount of the telescopic end according to the calculation. The calculation basis is that when the pile-stabilizing platform in the initial state is placed in seawater, the pressures of the support boots on the sea mud are equal; in this way, the pressures of the support boots of the pile-stabilizing platform on the sea mud after entering the water can be maximized, forming sufficient initial mud settlement and greatly reducing the settlement increment of the support boots during subsequent construction. S2. Place the photovoltaic platform on the seabed in the piling sea area through the shipboard crane, and make the pile-stabilizing platform located at the center of the rectangle formed by the photovoltaic platform support piles 51. The long side of the support frame 1 of the pile-stabilizing platform is approximately parallel to the long side of the rectangle formed by the 4 piles; S3. Under the assistance of the control system, start the first oil cylinder 16 to make the height of the pile-stabilizing platform exposed above the sea surface reach the construction requirements and make the chassis 22 in a horizontal state; Start the second oil cylinder 272 to make the upper end face of the collar 31 in a horizontal state, and then the axes of all the collars 31 reach the vertical state; S4. According to the information fed back by each sensor, calibrate the initial states of the water tank 41, the chassis 22, the telescopic arm 25, and the collar 31 in the decision-making software, and read the coordinates of the center of the chassis 22; S5. With the assistance of the control system, based on the pile position coordinates, the center coordinates of the chassis 22, and the position of the water tank 41, determine whether the water tank 41 obstructs the rotation of the telescopic arm 25; in this embodiment, for the positioning of the cable support pile 52, the telescopic arm 25 needs to rotate counterclockwise by approximately 45°, and none of the 4 water tanks 41 obstruct, so there is no need to perform the avoidance action of lowering the height of the water tank 41. Calculate the rotation amount of the chassis 22 and the telescopic amount of the telescopic arm 25, and transmit the instructions to the relevant motors and oil cylinders to accurately position the pile gripper 3 on the pile foundation. S6. With the assistance of the control system, calculate the pressure of the support boots of the pile stabilizing platform on the sea mud under the action of its own weight, seawater buoyancy, and accidental construction loads, and then calculate the displacement values of the lifting and lowering of each water tank 41 according to the equal pressure of the support boots on the sea mud, and then adjust the position of the water tank 41 in place. In this embodiment, the self-weight of the pile stabilizing platform is 380 kN, the vertical accidental load for pile driving is taken as 5 kN, the maximum buoyancy provided by each water tank 41 in the lowest state is 120 kN, and the self-weight of the cantilever structure composed of the fixed arm 24, telescopic arm 25, vertical arm 26, and hoop 31 is 100 kN; taking the center of the chassis 22 as the origin, and taking the directions parallel and perpendicular to the long side of the support frame 11 as the X and Y axes respectively, calculate the positions of each water tank 41 in the vertical direction according to the method in Table 1 and adjust them through the fourth oil cylinder 44. Table 1 Calculation method for the vertical position of the water tank

[0033] S7. With the assistance of the control system, start the third oil cylinder 32 to make the guide piece 33 push towards the center of the hoop 31 and reach an appropriate position. S8. Carry out pile driving construction according to other technical solutions for pile foundation construction.

[0034] The technical features not described in the present invention can be realized by or adopted from the prior art, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. An offshore photovoltaic pile-stabilizing platform adaptable to multiple pile positions, characterized in that, It includes a support frame (1) on which a pile position adjusting component (2) is mounted, and the pile position adjusting component (2) is connected to a pile gripper (3). The pile stabilizing platform is also provided with a balance system (4) and a control system.

2. The offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions according to claim 1, characterized in that, The support frame (1) is a double-layer steel truss structure, including an upper frame (11), a lower frame (12), legs (13) and connecting rods. Both the upper frame (11) and the lower frame (12) are rectangular frames. There are 4 legs (13) which are fixedly connected to the corners of the upper frame (11) and the lower frame (12) respectively, forming a basic frame of a cuboid pile stabilizing platform. A number of vertical rods (14) are arranged between the upper frame (11) and the lower frame (12), and reinforced cross rods (15) are respectively arranged on the upper frame (11) and the lower frame (12).

3. The offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions according to claim 1, characterized in that A first oil cylinder (16) is arranged at the bottom end of each leg (13), and the telescopic end of the first oil cylinder (16) is connected to a support shoe, which is in direct contact with the marine mud.

4. The offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions according to claim 3, characterized in that, The pile position adjusting component (2) includes a base (21), a chassis (22), an annular track (23), a fixed arm (24), a telescopic arm (25), a vertical arm (26), and a leveling mechanism (27). The base (21) is a circular structure and is fixedly connected to the middle of the upper frame (11). The upper part of the base (21) is rotatably connected to the circular chassis (22), and 360° rotation is realized through motor driving and gear transmission. The annular track (23) is coaxially arranged with the chassis (22) and is fixedly connected to the upper frame (11). The track surface of the annular track (23) is parallel to the upper surface of the chassis (22). The fixed arm (24) and the telescopic arm (25) are of an integral structure. The fixed arm (24) is rotatably connected in the vertical plane at the center position of the chassis (22) and is arranged on the annular track (23) through the leveling mechanism (27). The vertical arm (26) forms a 90° angle with the telescopic arm (25) and is fixedly connected to the end of the telescopic arm (25), connecting the pile gripper (3).

5. The offshore photovoltaic pile-stabilizing platform adaptable to multiple pile positions according to claim 4, characterized in that, The leveling mechanism (27) includes a first sliding head (271), a second oil cylinder (272) and a second sliding head (273). The first sliding head (271) and the second sliding head (273) are respectively in sliding fit connection with the annular track (23) and the fixed arm (24); the second oil cylinder (272) levels the fixed arm (24) through telescopic movement.

6. The offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions according to claim 5, characterized in that, There are two pile grippers (3). Each pile gripper (3) is composed of an annular hoop (31) and 4 third oil cylinders (32) evenly distributed circumferentially on the hoop (31). The telescopic end of each third oil cylinder (32) is fixedly installed with a curved guiding piece (33). The two hoop fasteners (31) are coaxially arranged and fixedly connected to the vertical arm (26) from top to bottom at an interval of 2 m. The upper end face of the hoop fastener (31) is perpendicular to the axis of the hoop fastener. The spatial trajectory formed during the rotation of the axis of the hoop fastener along with the fixed arm (24) is always within a plane.

7. The offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions according to claim 6, characterized in that, The balance system (4) includes a number of water tanks (41), a number of vertical slide rails (43) and a number of fourth oil cylinders (44); Each water tank (41) is provided with two vertical slide rails (43) and two fourth oil cylinders (44), and forms a balance unit. Each balance unit is installed inside the corner of the support frame (1); The water tank (41) has a cuboid structure and is provided with an opening (42) at the upper part. The water tank (41) is slidably connected to the support frame (1) through the vertical slide rails (43); The telescopic end of the fourth oil cylinder (44) is hinged to the bottom of the water tank, and the fixed end is fixedly connected to the upper layer frame (11).

8. The offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions according to claim 7, characterized in that, The control system includes a computer, decision-making software, a satellite positioning device, a horizontal sensor, an angular displacement sensor, a water level sensor and a displacement sensor; The satellite positioning device is used to measure the central coordinates of the chassis (22) of the pile stabilizing platform. A number of horizontal sensors are respectively arranged on the chassis (22) and the upper end face of the pile gripper (3), and feed back the horizontal state to the computer; The angular displacement sensor is arranged at the axis center of the chassis (22) and feeds back the amount of rotation angle to the computer; A number of water level sensors are respectively arranged inside the water tank (41) and feed back the water level to the computer; The displacement sensor is arranged on the vertical arm (26) and feeds back the extension amount of the telescopic arm (25) to the computer.

9. A method for an offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions as described in any one of claims 1-8, characterized in that, It includes the following steps: S1. Set the pile stabilizing platform to the initial state: The fixed arm (24) is perpendicular to the long side of the upper layer frame (11), and the telescopic arm (25) is in a contracted state; All the first oil cylinders (16), second oil cylinders (272) and third oil cylinders (32) are all set to the contracted state; All the fourth oil cylinders (44) are set to the contracted state; According to the average water level in the construction sea area, with the principle that when the water tank (41) is lifted to the highest state, the water level in the water tank is consistent with the sea level, initially determine the water injection height in the water tank (41), and further calculate the water injection height of the water tank (41) required for the force balance adjustment of the pile stabilizing platform, and finally determine the water injection height in the water tank that meets the requirements; All the fourth oil cylinders (44) on the side away from the pile gripper (3) are set to the contracted state, that is, the water tank is lifted to the highest. The fourth oil cylinders (44) on the side close to the pile gripper (3) determine the extension amount of the telescopic end according to the calculation. The calculation basis is that when the pile stabilizing platform in the initial state is placed in the sea water, the pressures of the support boots on the sea mud are equal; S2. Place the photovoltaic platform on the seabed in the piling sea area through the shipboard crane, and make the pile stabilizing platform located at the center of the rectangle surrounded by the support piles (51) of the photovoltaic platform. The long side of the support frame (1) of the pile stabilizing platform is roughly parallel to the long side of the rectangle surrounded by the 4 piles; S3. With the assistance of the control system, start the first oil cylinder (16) so that the height of the pile stabilizing platform above the sea surface meets the construction requirements and the chassis (22) is in a horizontal state; Start the second oil cylinder (272) so that the upper end face of the hooping (31) is in a horizontal state, and then the axes of all the hoopings (31) reach a vertical state; S4. According to the information fed back by each sensor, calibrate the initial states of the water tank (41), the chassis (22), the telescopic arm (25), and the hooping (31) in the decision-making software, and read the coordinates of the center of the chassis (22); S5. With the assistance of the control system, based on the pile position coordinates, the coordinates of the center of the chassis (22), and the position of the water tank (41), determine whether the water tank (41) obstructs the rotation of the telescopic arm (25), calculate the rotation amount of the chassis (22) and the telescopic amount of the telescopic arm (25), and transmit the instructions to the relevant motors and oil cylinders so that the pile gripper (3) accurately positions the pile foundation; S6. With the assistance of the control system, calculate the pressure of the support shoes of the pile stabilizing platform on the sea mud under the action of its own weight, sea water buoyancy, and accidental construction loads, and then calculate the displacement values of the lifting of each water tank (41) based on the equal pressure of the support shoes on the sea mud, and then adjust the position of the water tank (41) in place; Taking the center of the chassis (22) as the origin and taking the directions parallel and perpendicular to the long side of the support frame (1) 1 as the X and Y axes respectively, calculate the positions of each water tank (41) in the vertical direction and adjust them through the fourth oil cylinder (44); S7. With the assistance of the control system, start the third oil cylinder (32) so that the guide piece (33) advances towards the center of the hooping (31) and reaches an appropriate position; S8. Carry out pile driving construction according to other technical solutions for pile foundation construction.

10. The method for an offshore photovoltaic pile stabilizing platform adaptable to multiple pile positions according to claim 9, characterized in that, In step S6, calculating the positions of each water tank (41) in the vertical direction includes the following calculation methods: Step 1. Taking the X and Y axes as the boundaries, lift the water tanks (41) on the side away from the hooping (31) to the highest point; Step 2. Keep the positions of the water tanks (41) on the side away from the hooping (31) unchanged in the vertical direction and take the moment about the X axis as 0; Step 3. Keep the total buoyancy provided by the water tanks (41) on both sides of the X axis equal, adjust the positions of each water tank (41) in the vertical direction so that the moment about the Y axis is 0; Step 4. If step 3 fails to execute, then the water tanks (41) on the side away from the hooping (31) in step 1 are lowered by a certain limit value from the highest point, and then the subsequent steps are executed, and this process is repeated until the adjustment is completed.

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