Offshore photovoltaic pile sinking method based on shipborne pile gripper

Abstract

The invention discloses an offshore photovoltaic pile sinking method based on a shipborne pile gripper, and belongs to the technical field of offshore photovoltaic pile sinking. Comprising the following steps that a plurality of shipborne pile grippers are additionally arranged on a floating crane ship, and anchoring is conducted in place according to the actual situation; the floating crane ship is positioned by adopting floating anchoring and is accurately in place; the pipe pile transportation barge is berthed in the floating crane ship, and the floating crane ship crane turns the pile; after the crane feeds the pipe pile from the side face of the ship-borne pile gripper, the pipe pile is held tightly; the crane lowers the pipe pile for self-sinking, the measuring equipment is used for measuring the elevation in advance, the height to be hit is calculated, and the red dot laser is used for indicating the in-place scale in the hit process; after the pipe pile is driven, retesting is conducted, the ship-borne pile gripper is opened, and the floating crane ship is moved to the next pile position; the shipborne pile gripper is directly added on an existing floating crane ship, the floating crane ship can be directly transformed into a pile driving barge suitable for offshore photovoltaic pile sinking, the transformation cost is low, the construction cost and the production cost are reduced, and the problems that a special pile sinking equipment ship is high in cost and low in utilization rate are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of offshore photovoltaic pile sinking method based on shipborne pile holder, belong to offshore photovoltaic pile sinking technical field. BACKGROUND

[0002] At present, with the development of photovoltaic projects, the construction site gradually develops from land to shoal to sea. As a new emerging offshore new energy industry, offshore photovoltaic projects have the characteristics of dense site building structure and large number of pile sinking. Compared with wind power and other new energy industries, the pile foundation used in offshore photovoltaic industry has the characteristics of small size and light weight, and some also include part of the concrete pile foundation, which is quite different from the existing offshore pile foundation, and the equipment requirements are not completely the same. In addition, due to the dense arrangement of offshore photovoltaic site buildings, the offshore photovoltaic pile foundation not only requires high precision and verticality of the four pile foundations of a single photovoltaic net rack, but also requires higher relative position accuracy of the pile foundations of adjacent photovoltaic net racks.

[0003] As a new emerging industry, there are few construction ships specially used for photovoltaic foundation pile sinking. At present, bridge pile foundation pile driving ships are used for photovoltaic project pile sinking, which can achieve a certain construction efficiency, but a large part of the floating crane ships used in previous projects cannot meet the requirements of offshore photovoltaic pile sinking construction, resulting in idle ships and resource waste. Therefore, it is urgent to modify the existing ships to improve the utilization rate of ships. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides an offshore photovoltaic pile sinking method based on shipborne pile holder. The technical scheme for solving the above technical problems is as follows: An offshore photovoltaic pile sinking method based on shipborne pile holder, comprising the following steps: Step 1: After installing several shipborne pile holders on the floating crane ship, select one shipborne pile holder as the main construction equipment according to the actual situation and anchor it in place; Step 2: The floating crane ship is positioned by floating anchor, and since the photovoltaic net rack is low, the fairway anchor needs to pass under the photovoltaic net rack. The anchor boat first throws out a single anchor to the waterway, and then uses a small work boat to connect the anchor float and the floating crane ship body with high-strength cable to perform the anchor throwing operation through the net rack; Step 3: The center position of the shipborne pile holder is calibrated in advance, the center of the shipborne pile holder is monitored in real time by a professional offshore positioning system, and the positioning anchor winch is used for positioning to control the deviation between the center of the shipborne pile holder and the designed pile center position to meet the construction requirements, so as to realize accurate positioning of the floating crane ship; Step 4, the transport barge carrying the pipe pile is docked with the floating crane ship, the deck of the transport barge is fixed with a tool structure at the bottom of the pipe pile, the crane is hung with a pile turning beam below, and the pile turning beam is hung in the form of a single lifting point hook, and the pipe pile is directly lifted by the tool structure on the deck of the transport barge; Step 5, the crane feeds the pipe pile from the side of the ship-mounted pile holder, the ship-mounted pile holder holds the pipe pile tightly, adjusts the verticality of the pipe pile, and uses a digital inclinometer to check the verticality; Step 6, the crane lowers the pipe pile for self-sinking, the pile turning beam is unhooked after self-sinking, the pile hammer is lifted, the pile hammer is sleeved into the pipe pile for driving, the elevation is measured in advance by a measuring device before driving of the pipe pile, and a red dot laser is used to indicate the in-place scale during driving; Step 7, after the pipe pile is driven, the pile hammer is removed and is lifted and placed on the deck of the floating crane ship, the pipe pile is re-measured by the re-measuring personnel on the ship-mounted pile holder after construction, the ship-mounted pile holder is opened, and the floating crane ship is moved to the next pile position.

[0005] Further, the ship-mounted pile holder is fixed to the side or the stern side of the floating crane ship.

[0006] Further, the stern side is provided with two ship-mounted pile holders.

[0007] Further, the ship-mounted pile holder comprises two rotatable arms at the front side and two fixed arms at the rear side, a jacking jack is arranged on each of the fixed arms and the rotatable arms, a jacking roller is arranged on the telescopic end of each jacking jack, and the two rotatable arms are detachably connected.

[0008] Further, pins are arranged at the two ends of each rotatable arm.

[0009] Further, a driving oil cylinder is arranged outside each of the two fixed arms, and the two driving oil cylinders are connected with the two rotatable arms respectively.

[0010] Further, the ship-mounted pile holder has a double-layer structure and the double-layer structure is the same.

[0011] Further, the double-layer structure of the ship-mounted pile holder is fixedly connected with the floating crane ship through H-shaped steel.

[0012] Further, in step 5, the two rotatable arms of the ship-mounted pile holder are opened to feed the pipe pile, the pins are inserted into the two rotatable arms of the upper and lower layers after the pipe pile is fed, and then the jacking jacks of the upper and lower layers are extended to hold the pipe pile tightly.

[0013] Further, the floating crane ship is a full-rotation floating crane ship.

[0014] The present application has the beneficial effects that: by directly installing the ship-mounted pile gripper on the existing floating crane ship, and configuring a pile turning beam and a pile driver and other equipment, the full-rotation floating crane ship can be directly transformed into a pile driving ship suitable for offshore photovoltaic pile sinking, the transformation cost is low, the ship utilization rate is improved, the construction cost and production cost are reduced, and the problem of high cost of renting a special pile sinking equipment ship is avoided; The method has no limitation on the weight and length of the pile, and appropriate floating crane ships can be selected according to the weight and length of different piles, so that the lifting capacity and lifting height of the crane can meet the requirements, the application range is wide, and the use effect is good. The offshore photovoltaic pile sinking method based on the ship-mounted pile gripper has high pile sinking efficiency, and has been actually applied in a project. A total of 1166 piles are sunk in the project, the single pile sinking cycle is within 50 minutes (including the whole cycle process of pile turning), the pile sinking precision meets the technical requirements, and a large amount of time can be saved to meet the construction demand of large amount of photovoltaic pile sinking. The offshore photovoltaic pile sinking method based on the ship-mounted pile gripper can flexibly use the ship-mounted pile gripper on the ship side or the ship stern according to different offshore pipe pile position distribution characteristics and the ship positioning difficulty, and has strong operation applicability and good use effect. The combination of the conventional anchor throwing mode and the flexible water anchor throwing mode through the offshore photovoltaic building structure can well adapt to the characteristics of dense offshore photovoltaic building structures and low buildings, realize the anchoring positioning in a restricted area, ensure the stability of the pile driving ship in the floating state, and improve the operation efficiency. Through the professional offshore positioning system for calibrating the center of the pile gripper, the double-layer pile arm eight jacking jack system and the red dot laser, the pile sinking precision can be well controlled, the relative position deviation of four piles corresponding to the same photovoltaic net rack is controlled to be within 10 cm, the absolute position deviation of a single pile is controlled to be within 15 cm, the relative elevation deviation of the four piles is controlled to be within 2.5 cm, the absolute elevation deviation of a single pile is controlled to be within 15 cm, the single pile verticality deviation is controlled to be within 5‰, and the single pile top horizontal deviation is controlled to be within 0.5%. The new ship-mounted pile gripper is directly fixed on the deck of the floating crane ship, which is different from the independent pile gripper used in the field of wind power in the past, and the time for separately inserting piles for positioning of the independent pile gripper is reduced, and the positioning of the ship-mounted pile gripper is more rapid and accurate. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The present application has the beneficial effects that: by directly installing the ship-mounted pile gripper on the existing floating crane ship, and configuring a pile turning beam and a pile driver and other equipment, the transformation cost is low, the ship utilization rate is improved, the construction cost and production cost are reduced, and the problem of high cost of renting a special pile sinking equipment ship is avoided;

[0016] Fig. 2 The present application has the beneficial effects that: by directly installing the ship-mounted pile gripper on the existing floating crane ship, and configuring a pile turning beam and a pile driver and other equipment, the transformation cost is low, the ship utilization rate is improved, the construction cost and production cost are reduced, and the problem of high cost of renting a special pile sinking equipment ship is avoided;

[0017] Fig. 3 The present application has the beneficial effects that: by directly installing the ship-mounted pile gripper on the existing floating crane ship, and configuring a pile turning beam and a pile driver and other equipment, the transformation cost is low, the ship utilization rate is improved, the construction cost and production cost are reduced, and the problem of high cost of renting a special pile sinking equipment ship is avoided;

[0018] In the figure, 1, rotatable embrace arm; 2, fixed embrace arm; 3, push jack; 6, floating crane ship; 7, shipborne embrace pile holder; 8, photovoltaic net rack; 9, territorial water anchor; 10, transport barge; 11, pile turning lifting beam. DETAILED DESCRIPTION

[0019] The principles and features of the present application are described below, and the examples are only used to explain the present application, not to limit the scope of the present application.

[0020] According to Figs. 1-3 , a shipborne embrace pile holder based offshore photovoltaic pile sinking method, comprising the following steps: Step 1: After several shipborne embrace pile holders 7 are installed on the floating crane ship 6, according to the actual situation, the shipborne embrace pile holder 7 on the side or the stern of the ship is selected as the main construction equipment for anchoring in place; Step 2: The floating crane ship 6 adopts floating state anchoring positioning, for the case that the territorial water anchor 9 needs to pass under the photovoltaic net rack 8, due to the low height of the photovoltaic net rack 8, the ordinary anchor boat cannot directly pass under the photovoltaic net rack 8, the anchor boat is used to throw out a single anchor to the waterway first, and then a small work boat is used to connect the anchor float and the ship body of the floating crane ship 6 with high-strength cable to perform the anchor throwing operation of passing through the net rack; Step 3: The center position of the shipborne embrace pile holder 7 is calibrated in advance, the center of the shipborne embrace pile holder 7 is monitored in real time through a professional offshore positioning system, and the positioning anchor winch is used for positioning to control the deviation between the center of the shipborne embrace pile holder 7 and the design pile center position to meet the construction requirements, so as to realize the accurate positioning of the floating crane ship 6; Step 4, the transport barge 10 carrying the pipe pile docks at the floating crane ship 6, the transport barge 10 deck is fixed with a tool structure at the bottom of the pipe pile, a pile turning lifting beam 11 is hung below the crane in the form of a single lifting point hook, and the pipe pile is directly lifted by means of the tool structure on the deck of the transport barge 10; Step 5: The crane feeds the pipe pile into the shipborne embrace pile holder 7 from the side of the shipborne embrace pile holder 7, and then closes the upper and lower embrace arms and inserts the pin shaft for fixation; the eight push jacks 3 on the upper and lower embrace arms are pushed out by the same stroke to ensure that the center of the pipe pile coincides with the center of the shipborne embrace pile holder 7, the pipe pile is embraced tightly and the verticality of the pipe pile is adjusted, and the digital inclinometer is used for acceptance of the verticality; Step 6: The pipe pile is lowered by the crane of the floating crane ship 6 for self-sinking, the pile turning lifting beam 11 is unhooked after self-sinking, the pile hammer is lifted after the lifting beam is unhooked, the pile hammer is sleeved into the pipe pile for driving; after the pipe pile is sunk, the diagonal position push jacks 3 are adjusted to ensure the verticality of the pipe pile, and the verticality meets the requirements; the elevation is measured and the height to be driven is calculated in advance before driving the pipe pile, and the red dot laser indication is used to indicate the scale during driving; Step 7: After the pipe pile driving is completed, the pile hammer is removed and hoisted to the deck of the floating crane ship 6, and the re-measuring personnel re-measure the pipe pile on the ship-mounted pile holder 7, after the re-measurement is completed, the ship-mounted pile holder 7 is opened, all the pushing jacks 3 are retracted, the pin shaft is pulled out, the upper and lower two arms are opened, and then the floating crane ship 6 is moved to the next designed position for the next round of pile driving operation.

[0021] The stern side of the ship is provided with two ship-mounted pile holders 7.

[0022] The single layer of the ship-mounted pile holder 7 includes two rotatable arms 1 on the front side and two fixed arms 2 on the rear side, the fixed arms 2 and the rotatable arms 1 are each provided with a pushing jack 3, the pushing jack 3 is provided with a pushing roller at the telescopic end, and the two rotatable arms 1 are detachably connected.

[0023] The rotatable arms 1 are each provided with a connected pin shaft at both ends.

[0024] The outer side of the two fixed arms 2 is provided with a driving oil cylinder, and the two driving oil cylinders are connected with the two rotatable arms 1.

[0025] The upper and lower layers of the ship-mounted pile holder 7 have the same structure, and are fixed to one side of the floating crane ship 6 through a main body support, the lower end of each rotatable arm 1 is a circular arc H-shaped steel, and the upper end is a rotating shaft connecting plate, the rotating shaft connecting plate is provided with a pushing jack 3, the working end of the pushing jack 3 is provided with a pushing roller, the pushing jack 3 drives the rotatable arm 1 to open and close, is used for opening the pipe pile when feeding, and the pushing jacks 3 of the upper and lower layers are extended to hold the pipe pile after feeding; the pin shaft is a forged part, which is used for connection when the rotatable arm 1 is closed, and ensures that the two rotatable arms 1 of each layer are fixed when the jack pushes; the main body of the ship-mounted pile holder 7 is welded by a plurality of H-shaped steels, reinforcing ribs, panels and rotating shaft connecting plates, which are used for bearing and connecting various components.

[0026] The upper and lower double-layer structures of the ship-mounted pile holder 7 are fixedly connected with the floating crane ship 6 through H-shaped steels.

[0027] The floating crane ship 6 is a full-rotation floating crane ship.

[0028] By directly installing the ship-mounted pile holder 7 on the existing floating crane ship 6 and configuring a pile turning beam 11, a pile hammer and other equipment, the full-rotation floating crane ship 6 can be directly transformed into a pile driving ship suitable for offshore photovoltaic pile sinking, the transformation cost is low, the ship utilization rate is improved, the construction cost and production cost are reduced, and the problem of high cost of renting special equipment ships for pile sinking is avoided. The method has no limitation on the weight and length of the pile, and appropriate floating crane ships 6 can be selected according to the weight and length of different piles to ensure that the lifting capacity and lifting height of the crane meet the requirements, so that the method has a wide range of adaptation and good use effect. The pile sinking efficiency of the offshore photovoltaic pile sinking method based on the ship-mounted pile holder 7 is high, and the method has been actually applied in a project. In the project, 1166 piles are sunk, the whole cycle of sinking a single pile is within 50 minutes (including the whole cycle process such as pile turning), the pile sinking precision meets the technical requirements, and a large amount of time can be saved to meet the construction demand of large amount of photovoltaic pile sinking, and a large amount of time can be saved; The offshore photovoltaic pile sinking method based on the ship-mounted pile holder 7 can flexibly use the ship-mounted pile holder 7 on the ship side or the ship stern according to different offshore pipe pile position distribution characteristics and the ship positioning difficulty, and has strong operation applicability and good use effect. The conventional anchor throwing mode is combined with the mode of throwing the territorial water anchor 9 through the offshore photovoltaic building structure, which can well adapt to the characteristics of dense offshore photovoltaic building structures and low buildings, realize the anchoring positioning in a restricted area, ensure the stability of the piling ship in the floating state, and improve the operation efficiency. Through the professional offshore positioning system for calibrating the center of the ship-mounted pile holder 7, the double-layered pile holding arm eight jacking systems and the red dot laser, the pile sinking precision can be well controlled, the relative position deviation of four piles corresponding to the same photovoltaic net rack 8 is controlled to be within 10 cm, the absolute position deviation of a single pile is controlled to be within 15 cm, the relative elevation deviation of the four piles is controlled to be within 2.5 cm, the absolute elevation deviation of a single pile is controlled to be within 15 cm, the verticality deviation of a single pile is controlled to be within 5 ‰, and the horizontal deviation of the top of a single pile is controlled to be within 0.5%. The new ship-mounted pile holder 7 is directly fixed to the deck of the floating crane 6, which is different from the independent pile holder used in the previous wind power field, and the time for separately inserting piles for positioning of the independent pile holder is reduced, and the positioning of the ship-mounted pile holder 7 is more rapid and accurate.

[0029] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for offshore photovoltaic pile sinking based on a ship-borne pile gripper, characterized in that: The following steps are involved: Step 1: After installing several ship-borne pile grippers (7) on the floating crane (6), one ship-borne pile gripper (7) is selected as the main construction equipment for anchoring in place according to actual conditions; Step 2: The floating crane (6) is positioned by floating anchoring. Since the photovoltaic grid (8) is low in height, the water anchor (9) needs to pass under the photovoltaic grid (8). A single anchor is first thrown into the waterway using an anchor boat, and then a small work boat with a high-strength cable is used to connect the anchor buoy and the floating crane (6) hull to perform the anchoring operation of passing through the grid and the water anchor (9). Step 3: calibrate the center position of the ship-borne pile gripper (7) in advance, monitor the center of the ship-borne pile gripper (7) in real time through a professional marine positioning system, use the positioning anchor to winch the ship, control the deviation between the center of the ship-borne pile gripper (7) and the designed pile center to meet the construction requirements, and realize the precise positioning of the floating crane (6); Step 4: The transport barge (10) carrying the pipe piles is moored to the floating crane (6). A tooling structure is fixed on the deck of the transport barge (10) at the bottom of the pipe piles. A pile-turning lifting beam (11) is hung under the crane. A single-point hook is used to directly lift the piles on the deck of the transport barge (10) with the help of the tooling structure. Step 5: The crane feeds the pile from the side of the ship-borne pile holder (7), and the ship-borne pile holder (7) holds the pile tightly and adjusts the verticality of the pile. The verticality is checked using a digital inclinometer; Step 6: lower the pile by crane to self-sink, turn over the pile hanging beam (11) to remove the hook after self-sinking, lift the pile hammer after removing the hook, and insert the pile hammer into the pile to drive the pile; before driving the pile, use the measuring equipment to measure the elevation and calculate the height to be driven in advance, and use the red dot laser to indicate the scale during the driving process; Step 7: After the pile driving is completed, the pile hammer is removed and hoisted onto the deck of the floating crane (6). The re-test personnel re-test the piles after construction on the ship-borne pile holder (7), open the ship-borne pile holder (7), and move the floating crane (6) to the next pile position.

2. The offshore photovoltaic pile sinking method based on a ship-borne pile gripper according to claim 1, characterized in that: The ship-borne pile gripper (7) is fixed to the side or stern of the floating crane (6).

3. The offshore photovoltaic pile sinking method based on a ship-borne pile gripper according to claim 2, characterized in that: Two ship-borne pile grippers (7) are provided on the stern side of the ship.

4. The offshore photovoltaic pile sinking method based on a ship-borne pile gripper according to claim 1, characterized in that: The ship-borne pile gripper (7) comprises two rotatable arms (1) at the front and two fixed arms (2) at the rear. Both the fixed arms (2) and the rotatable arms (1) are provided with a push jack (3). Both the push jack (3) and the telescopic end are provided with a push roller. The two rotatable arms (1) are detachably connected.

5. The offshore photovoltaic pile sinking method based on a ship-borne pile gripper according to claim 4, characterized in that: Both ends of the rotatable arm (1) are provided with connecting pins.

6. The offshore photovoltaic pile sinking method based on a ship-borne pile gripper according to claim 5, characterized in that: A driving oil cylinder is provided on the outside of the two fixed arms (2), one end of the driving oil cylinder is fixed to the fixed arm (2), and the telescopic end is connected to the two rotatable arms (1) respectively.

7. The offshore photovoltaic pile sinking method based on a ship-borne pile gripper according to claim 4, characterized in that: The ship-borne pile gripper (7) has an upper and lower double-layer structure, and the upper and lower double-layer structures are identical.

8. The offshore photovoltaic pile sinking method based on a ship-borne pile gripper according to claim 7, characterized in that: The upper and lower double-layer structures of the ship-borne pile gripper (7) are fixedly connected to the floating crane (6) via H-shaped steel.

9. The offshore photovoltaic pile sinking method based on a ship-borne pile gripper according to claim 5, characterized in that: In step 5, the two rotatable arms (1) of the ship-borne pile gripper (7) are opened to feed the pile, and after the pile is fed, the pins are inserted into the two rotatable arms (1) of the upper and lower layers, and then the upper and lower pushing jacks (3) are extended to hold the pile tightly.

10. The offshore photovoltaic pile sinking method based on a ship-borne pile gripper according to claim 1, characterized in that: The floating crane (6) is a fully rotating floating crane.

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