A method for sinking a photovoltaic pile at sea based on a ship-mounted pile hugger

Abstract

This invention discloses a method for driving marine photovoltaic (PV) piles based on ship-mounted pile clamps, belonging to the field of marine PV pile driving technology. The method includes the following steps: several ship-mounted pile clamps are installed on a floating crane vessel, which is then anchored and positioned according to actual conditions; the floating crane vessel is positioned using floating anchoring; a pipe pile transport barge berths on the floating crane vessel, and the floating crane vessel's crane flips the pile; the crane feeds the pipe pile into the side of the ship-mounted pile clamp and clamps it tightly; the crane lowers the pipe pile for self-sinking, measuring the elevation and calculating the required driving height beforehand, and using a red dot laser to indicate the driving position during the driving process; after the pipe pile is driven, a re-measurement is performed, the ship-mounted pile clamps are opened, and the floating crane vessel is moved to the next pile location. By directly installing ship-mounted pile clamps on an existing floating crane vessel, it can be directly converted into a pile driving vessel suitable for marine PV pile driving, resulting in low conversion costs, reduced construction and production costs, and avoiding the problems of high cost and low utilization rate of dedicated pile driving equipment vessels.

Description

Technical Field

[0001] This invention relates to a method for driving marine photovoltaic piles based on a ship-mounted pile driver, belonging to the field of marine photovoltaic pile driving technology. Background Technology

[0002] With the development of photovoltaic projects, construction sites have gradually expanded from land to shallow waters and then to the sea. Offshore photovoltaic projects, as an emerging offshore new energy industry, are characterized by dense building structures and a large number of piles. The piles used in offshore photovoltaic projects are smaller and lighter than those used in wind power and other new energy industries, and some even include concrete piles, differing significantly from existing offshore piles and requiring different equipment. Furthermore, due to the dense layout of offshore photovoltaic sites, offshore photovoltaic piles not only require high precision and verticality of the four piles for a single photovoltaic grid, but also higher precision in the relative position of piles between adjacent photovoltaic grids.

[0003] As an emerging industry, there are very few construction vessels specifically designed for photovoltaic foundation pile driving. At present, bridge pile driving vessels are mostly used for photovoltaic projects, which can achieve a certain level of construction efficiency. However, a large number of floating crane vessels used in previous projects cannot meet the requirements for offshore photovoltaic pile driving construction, resulting in idle vessels and wasted resources. It is urgent to modify existing vessels to improve their utilization rate. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention provides a method for driving marine photovoltaic piles based on a ship-mounted pile driver.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A method for driving marine photovoltaic piles based on a ship-mounted pile driver includes the following steps:

[0007] Step 1: After installing several shipborne pile drivers on the floating crane vessel, select one shipborne pile driver as the main construction equipment and anchor it in place according to the actual situation.

[0008] Step 2: The floating crane vessel adopts floating anchoring and positioning. Since the photovoltaic grid is low, the water-leading anchor needs to pass under the photovoltaic grid. The anchor boat first throws a single anchor into the waterway, and then a small work boat with a high-strength cable connects the anchor float to the hull of the floating crane vessel to carry out the water-leading anchor throwing operation through the grid.

[0009] Step 3: Pre-calibrate the center position of the shipborne pile gripper, monitor the center of the shipborne pile gripper in real time through a professional marine positioning system, use the positioning anchor winch to position the shipborne pile gripper and control the deviation between the center of the shipborne pile gripper and the design pile center to meet the construction requirements, and achieve precise positioning of the floating crane.

[0010] Step 4: The transport barge carrying the pipe piles berths at the floating crane. The transport barge deck is fixed with a tooling structure located at the bottom of the pipe piles. The pile-turning lifting beam is hung below the crane. The piles are turned and lifted directly on the transport barge deck with the help of the tooling structure using a single lifting point hook.

[0011] Step 5: After the crane feeds the pipe pile into the side of the ship-mounted pile gripper, the ship-mounted pile gripper will hold the pipe pile tightly and adjust the verticality of the pipe pile. The verticality will be checked using a digital display inclinometer.

[0012] Step 6: The crane lowers the pipe pile for self-sinking. After self-sinking, the pile lifting beam is flipped to remove the hook. After removing the hook, the pile hammer is lifted and inserted into the pipe pile for driving. Before driving the pipe pile, the elevation is measured and the height to be driven is calculated using measuring equipment. During the driving process, the red dot laser is used to indicate the position scale.

[0013] Step 7: After the pipe piles are driven, remove the pile hammer and hoist it onto the deck of the floating crane. The re-survey personnel will then conduct a re-survey on the pipe piles using the ship-mounted pile gripper. After that, open the ship-mounted pile gripper and move the floating crane to the next pile location.

[0014] Furthermore, the shipborne pile driver is fixed to the side or stern of the floating crane vessel.

[0015] Furthermore, two ship-mounted pile drivers are provided on the stern side of the ship.

[0016] Furthermore, the shipborne pile driver includes two rotatable arms on the front and two fixed arms on the rear. Both the fixed arms and the rotatable arms are equipped with jacks, and the telescopic ends of the jacks are equipped with jacking rollers. The two rotatable arms are detachably connected.

[0017] Furthermore, both ends of the rotatable arm are equipped with connecting pins.

[0018] Furthermore, each of the two fixed arms is equipped with a drive cylinder on its outer side, and the two drive cylinders are respectively connected to the two rotatable arms.

[0019] Furthermore, the shipborne pile driver has a double-layer structure with identical upper and lower layers.

[0020] Furthermore, the upper and lower double-layer structure of the shipborne pile driver is fixedly connected to the floating crane vessel via H-beams.

[0021] Furthermore, in step 5, after the two rotatable arms of the shipborne pile gripper are opened, the pipe pile is fed in. After the pipe pile is fed in, the pin is inserted into the two rotatable arms of the upper and lower layers, and then the jacks of the upper and lower layers extend to grip the pipe pile tightly.

[0022] Furthermore, the floating crane vessel is a fully rotating floating crane vessel.

[0023] The beneficial effects of this invention are: by directly installing a ship-mounted pile gripper on an existing floating crane vessel and equipping it with equipment such as a pile-turning lifting beam and a pile hammer, a fully rotating floating crane vessel can be directly converted into a pile-driving vessel suitable for offshore photovoltaic pile driving. The conversion cost is low, the utilization rate of the vessel is improved, the construction cost and production cost are reduced, and the problem of high cost of renting a special equipment vessel for pile driving is avoided.

[0024] This method has no restrictions on the weight and length of the piles. Appropriate floating cranes can be selected according to the weight and length of different piles, as long as the lifting capacity and lifting height of the cranes meet the requirements. It has a wide range of applications and good results.

[0025] The offshore photovoltaic pile driving method based on ship-mounted pile holders has high pile driving efficiency and has been applied in actual projects. A total of 1,166 piles were driven in this project. The entire cycle of driving a single pile is within 50 minutes (including the entire cycle process such as positioning and pile turning). The pile driving accuracy meets the technical requirements and can meet the construction needs of a large number of photovoltaic piles, saving a lot of time.

[0026] The marine photovoltaic pile driving method based on ship-mounted pile grippers can flexibly use ship-mounted pile grippers on the side or stern of the ship according to the different distribution characteristics of marine pipe piles and the difficulty of ship positioning. It has strong operational applicability and good performance.

[0027] Combining conventional anchoring methods with flexible lead-water anchoring methods that penetrate offshore photovoltaic building structures can effectively adapt to the characteristics of dense and low-rise offshore photovoltaic building structures, achieve anchoring and positioning in restricted areas, ensure the stability of the piling vessel in a floating state, and improve operational efficiency.

[0028] By using a professional marine positioning system for calibrating the center of the pile driver, a double-layered eight-jack system, and a red dot laser, the accuracy of pile driving can be well controlled. The relative position deviation of the four piles corresponding to the same photovoltaic grid can be controlled within 10 cm, the absolute position deviation of a single pile can be controlled within 15 cm, the relative elevation deviation of the four piles can be controlled within 2.5 cm, the absolute elevation deviation of a single pile can be controlled within 15 cm, the verticality deviation of a single pile can be controlled within 5‰, and the horizontality deviation of the pile top can be controlled within 0.5%.

[0029] The new type of shipborne pile gripper is directly fixed to the deck of the floating crane vessel, which is different from the independent pile gripper used in the wind power field in the past. It reduces the time required for independent pile grippers to be inserted and positioned separately, and the positioning of the shipborne pile gripper is faster and more accurate. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the floating crane vessel in place according to the present invention.

[0031] Figure 2This is a schematic diagram of the floating crane feeding piles according to the present invention.

[0032] Figure 3 This is a schematic diagram of the structure of the shipborne pile driver of the present invention.

[0033] In the diagram, 1. Rotatable boom; 2. Fixed boom; 3. Pushing jack; 6. Floating crane; 7. Shipborne pile driver; 8. Photovoltaic grid; 9. Leading anchor; 10. Transport barge; 11. Pile turning and lifting beam. Detailed Implementation

[0034] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0035] according to Figures 1-3 A method for driving marine photovoltaic piles based on a ship-mounted pile driver includes the following steps:

[0036] Step 1: After installing several shipborne pile drivers 7 on the floating crane vessel 6, select the shipborne pile drivers 7 on the side or stern as the main construction equipment and anchor them in place according to the actual situation.

[0037] Step 2: The floating crane vessel 6 adopts floating anchoring and positioning. For the case where the lead anchor 9 needs to pass under the photovoltaic grid 8, since the photovoltaic grid 8 is low, ordinary anchor boats cannot directly pass under the photovoltaic grid 8. The anchor boat first throws a single anchor into the waterway, and then a small work boat with a high-strength cable connects the anchor float to the hull of the floating crane vessel 6 to carry out the anchoring operation of the lead anchor 9 through the grid.

[0038] Step 3: Pre-calibrate the center position of the shipborne pile gripper 7, monitor the center of the shipborne pile gripper 7 in real time through a professional marine positioning system, use the positioning anchor winch to position, control the deviation between the center of the shipborne pile gripper 7 and the designed pile center position to meet the construction requirements, and achieve precise positioning of the floating crane 6.

[0039] Step 4: The transport barge 10 carrying the pipe piles berths at the floating crane vessel 6. The deck of the transport barge 10 is fixed with a tooling structure located at the bottom of the pipe piles. The pile-turning lifting beam 11 is hung below the crane. The piles are turned and lifted directly on the deck of the transport barge 10 with the help of the tooling structure using a single lifting point hook.

[0040] Step 5: The crane feeds the pipe pile into the ship-mounted pile gripper 7 from the side. After feeding, the upper and lower layers of the gripper arms are closed and the pins are inserted for fixation. The eight jacks 3 on the upper and lower layers of the gripper arms push out the same stroke to ensure that the center of the pipe pile coincides with the center of the ship-mounted pile gripper 7. The pipe pile is gripped tightly and the verticality of the pipe pile is adjusted. The verticality is checked using a digital inclinometer.

[0041] Step 6: The floating crane 6 lowers the pipe pile for self-sinking. After self-sinking, the pile lifting beam 11 is unhooked. After the lifting beam is unhooked, the pile hammer is lifted and inserted into the pipe pile for driving. After the pipe pile enters the mud, the diagonally positioned jacks 3 are adjusted to ensure the verticality of the pipe pile and to ensure that the verticality meets the requirements. Before driving the pipe pile, the elevation is measured and the height to be driven is calculated using measuring equipment. During the driving process, the red dot laser indicator is used to indicate the position scale.

[0042] Step 7: After the pipe piles are driven, the pile hammer is removed and hoisted to the deck of the floating crane vessel 6. The re-survey personnel carry out the construction of the pipe piles on the ship-mounted pile gripper 7 and then re-survey. After the re-survey, the ship-mounted pile gripper 7 is opened, all the jacking jacks 3 are retracted, the pin is pulled out, and the upper and lower layers of the gripper arms are opened. Then the floating crane vessel 6 is moved to the next designed position to carry out the next round of pile driving operation.

[0043] Two ship-mounted pile drivers 7 are installed on the stern side of the ship.

[0044] The shipborne pile driver 7 has two rotatable arms 1 on the front side and two fixed arms 2 on the rear side. Both the fixed arms 2 and the rotatable arms 1 are equipped with jacks 3. The telescopic ends of the jacks 3 are equipped with jacking rollers. The two rotatable arms 1 are detachably connected.

[0045] Both ends of the rotatable arm 1 are equipped with connecting pins.

[0046] Both fixed arms 2 are equipped with drive cylinders on their outer sides, and the two drive cylinders are respectively connected to the two rotatable arms 1.

[0047] The shipborne pile gripper 7 has an identical upper and lower structure, fixed to one side of the floating crane 6 by a main support. The lower ends of the two rotatable gripping arms 1 are arc-shaped H-beams, and the upper ends are rotating shaft connecting plates. The rotating shaft connecting plates are equipped with jacking jacks 3, and the working ends of the jacking jacks 3 are equipped with jacking rollers. The jacking jacks 3 drive the rotatable gripping arms 1 to open and close, which is used to open and feed the pipe pile during pile feeding, and after pile feeding, the jacking jacks 3 of the upper and lower layers extend to grip the pipe pile tightly. The pin is a forged part, used for connection when the rotatable gripping arms 1 are closed, to ensure that the two rotatable gripping arms 1 of each layer are fixed when the jacks push. The main body of the shipborne pile gripper 7 is welded from several H-beams, reinforcing ribs, panels and rotating shaft connecting plates, which are used to support and connect the various components.

[0048] The shipborne pile driver 7 has a double-layer structure, both upper and lower, which is fixedly connected to the floating crane 6 via H-beams.

[0049] The floating crane vessel 6 is a fully rotating floating crane vessel.

[0050] By directly installing a shipborne pile driver 7 on the existing floating crane vessel 6 and equipping it with equipment such as a pile-turning lifting beam 11 and a pile hammer, the fully rotating floating crane vessel 6 can be directly converted into a pile-driving vessel suitable for offshore photovoltaic pile driving. The conversion cost is low, the utilization rate of the vessel is improved, the construction cost and production cost are reduced, and the problem of high cost of renting a special equipment vessel for pile driving is avoided.

[0051] This method has no restrictions on the weight and length of the piles. A suitable floating crane can be selected according to the weight and length of different piles, as long as the lifting capacity and lifting height of the crane meet the requirements. It has a wide range of applications and good results.

[0052] The offshore photovoltaic pile driving method based on the ship-mounted pile driver 7 has high pile driving efficiency and has been applied in actual projects. A total of 1,166 piles were driven in this project. The entire cycle of driving a single pile is within 50 minutes (including the entire cycle process such as positioning and pile turning). The pile driving accuracy meets the technical requirements and can meet the construction needs of a large number of photovoltaic piles, saving a lot of time.

[0053] The offshore photovoltaic pile driving method based on the ship-mounted pile driver 7 can flexibly use the ship-mounted pile driver 7 on the side or stern of the ship according to the different distribution characteristics of the offshore pipe piles and the difficulty of ship positioning. It has strong operational applicability and good performance.

[0054] Combining conventional anchoring methods with the flexible method of launching pilot anchors through offshore photovoltaic building structures can effectively adapt to the characteristics of dense and low-rise offshore photovoltaic building structures, achieve anchoring and positioning in restricted areas, ensure the stability of the piling vessel in a floating state, and improve operational efficiency.

[0055] By using a professional marine positioning system calibrated at the center of the shipborne pile driver 7, a double-layered eight-jack system 3, and a red dot laser, the pile driving accuracy can be well controlled. The relative positional deviation of the four piles corresponding to the same photovoltaic grid 8 can be controlled within 10 cm, and the absolute positional deviation of a single pile can be controlled within 15 cm; the relative elevation deviation of the four piles can be controlled within 2.5 cm, and the absolute elevation deviation of a single pile can be controlled within 15 cm; the verticality deviation of a single pile can be controlled within 5‰, and the horizontality deviation of the pile top can be controlled within 0.5%.

[0056] The new shipborne pile driver 7 is directly fixed to the deck of the floating crane vessel 6. Unlike the independent pile drivers used in the wind power field in the past, it reduces the time required for independent pile drivers to be inserted and positioned separately. The shipborne pile driver 7 is positioned faster and more accurately.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for driving marine photovoltaic piles based on a ship-mounted pile driver, characterized in that, Includes the following steps: Step 1: After installing several shipborne pile drivers (7) on the floating crane vessel (6), select one shipborne pile driver (7) as the main construction equipment and anchor it in place according to the actual situation. Step 2: The floating crane (6) adopts floating anchoring positioning. Since the photovoltaic grid (8) is low, the water-leading anchor (9) needs to pass under the photovoltaic grid (8). The anchor boat first throws the single anchor into the waterway, and then a small work boat with high-strength cable connects the anchor float to the hull of the floating crane (6) to carry out the anchoring operation of the water-leading anchor (9) through the grid. Step 3: Pre-calibrate the center position of the shipborne pile gripper (7), monitor the center of the shipborne pile gripper (7) in real time through a professional marine positioning system, use the positioning anchor winch to position, control the deviation between the center of the shipborne pile gripper (7) and the design pile center to meet the construction requirements, and achieve precise positioning of the floating crane (6). Step 4: The transport barge (10) carrying the pipe piles berths at the floating crane (6). The deck of the transport barge (10) is fixed with a tooling structure located at the bottom of the pipe piles. The pile lifting beam (11) is hung below the crane. The piles are lifted directly on the deck of the transport barge (10) using the tooling structure in the form of a single lifting point hook. Step 5: After the crane feeds the pipe pile into the side of the ship-mounted pile gripper (7), the ship-mounted pile gripper (7) will hold the pipe pile tightly and adjust the verticality of the pipe pile. The verticality will be checked using a digital display inclinometer. Step 6: The crane lowers the pipe pile for self-sinking. After self-sinking, the pile lifting beam (11) is flipped to remove the hook. After removing the hook, the pile hammer is lifted and inserted into the pipe pile for driving. Before driving the pipe pile, the elevation is measured and the height to be driven is calculated using measuring equipment. During the driving process, the red dot laser is used to indicate the position scale. Step 7: After the pipe pile is driven, remove the pile hammer and hoist it to the deck of the floating crane (6). The re-survey personnel carry out the construction of the pipe pile on the ship-mounted pile gripper (7) and then re-survey. Open the ship-mounted pile gripper (7) and move the floating crane (6) to the next pile position.

2. The method for driving marine photovoltaic piles based on a ship-mounted pile driver according to claim 1, characterized in that, The shipborne pile driver (7) is fixed to the side or stern of the floating crane (6).

3. The method for driving marine photovoltaic piles based on a ship-mounted pile driver according to claim 2, characterized in that, Two ship-mounted pile drivers (7) are provided on the stern side of the ship.

4. The method for driving marine photovoltaic piles based on a ship-mounted pile driver according to claim 1, characterized in that, The ship-mounted pile driver (7) includes two rotatable arms (1) on the front side and two fixed arms (2) on the rear side. Both the fixed arms (2) and the rotatable arms (1) are equipped with jacks (3). The telescopic ends of the jacks (3) are equipped with jacking rollers. The two rotatable arms (1) are detachably connected.

5. A method for driving marine photovoltaic piles based on a ship-mounted pile driver according to claim 4, characterized in that, The rotatable arm (1) has connecting pins at both ends.

6. A method for driving marine photovoltaic piles based on a ship-mounted pile driver according to claim 5, characterized in that, Both fixed arms (2) are equipped with drive cylinders on their outer sides. One end of each drive cylinder is fixed on the fixed arm (2), and the telescopic end is connected to the two rotatable arms (1).

7. A method for driving marine photovoltaic piles based on a ship-mounted pile driver according to claim 4, characterized in that, The shipborne pile driver (7) has a double-layer structure with identical upper and lower layers.

8. A method for driving marine photovoltaic piles based on a ship-mounted pile driver according to claim 7, characterized in that, The shipborne pile driver (7) has a double-layer structure, both upper and lower, which is fixedly connected to the floating crane (6) by H-beams.

9. A method for driving marine photovoltaic piles based on a ship-mounted pile driver according to claim 5, characterized in that, In step 5, the two rotatable arms (1) of the ship-mounted pile clamp (7) are opened and the pipe pile is fed in. After the pipe pile is fed in, the pin is inserted into the two rotatable arms (1) of the upper and lower layers, and then the upper and lower layer push jacks (3) extend to clamp the pipe pile tightly.

10. A method for driving marine photovoltaic piles based on a ship-mounted pile driver according to claim 1, characterized in that, The floating crane vessel (6) is a fully azimuth floating crane vessel.

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