A method for rolling a jacket onto a ship based on balanced force

Abstract

The application discloses a method for rolling loading of a jacket based on balanced stress, which comprises the following steps: on the basis of a balanced stress distribution structure, a rolling loading step of the jacket through SPMT vehicles is realized; when a height difference between a barge and a transition connection platform causes a ramp to be inclined, a hydraulic lifting cylinder is lowered, and a height difference between the transition connection platform and the barge is compensated by the lifting displacement of the SPMT vehicles, so that the rolling loading of the jacket through the SPMT vehicles is ensured to be stable, and the problem that the lifting displacement of the SPMT vehicles is insufficient to compensate for the height difference between the barge and the wharf, thereby affecting the stable rolling loading of the jacket, is solved.

Description

Technical Field

[0001] This invention relates to a method for rolling-on / roll-off loading of jackets onto ships based on balanced forces, belonging to the field of offshore wind-driven construction technology. Background Technology

[0002] Offshore wind turbine jackets serve as the installation foundation for underwater pile foundations and the upper substation modules. After the jackets are prefabricated on shore, they need to be transported to the offshore construction site by barge. The jackets are then transported to the barge deck by SPTM trucks (see Chinese Patent Publication No. CN116216364A).

[0003] When the SPTM truck transports the jacket foundation from the dock to the barge deck, the weight of the jacket foundation and the SPTM truck causes the barge bow, which is close to the dock, to drop. At this time, the height difference between the barge and the dock is too large, and the lifting displacement of the SPTM truck itself is insufficient to compensate for the height difference between the barge and the dock, which affects the smooth roll-on / roll-off loading of the jacket foundation. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a method for rolling-on / roll-off loading of a jacket structure based on balanced forces.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a method for rolling-on / roll-off loading of a jacket structure based on balanced force distribution, comprising: a step of rolling-on / roll-off loading of the jacket structure onto a ship via a SPMT vehicle based on a balanced force distribution structure.

[0007] The balanced force distribution structure is achieved through the balanced force distribution construction steps.

[0008] The steps for constructing the balanced force distribution include: mooring the barge on both sides of the dock with positioning cables, installing a transition platform between the barge and the dock, installing a hydraulic lifting cylinder at the bottom of the transition platform, and installing the hydraulic lifting cylinder on the seabed via mounting bases.

[0009] The balanced force distribution construction step further includes: installing a variable carrier at the end of the barge away from the dock via a cable, the cable being connected to a cable reel on the barge, and the variable carrier being thrown onto the seabed; the variable carrier is hollow inside and connected to valves A and B, the variable carrier can be evacuated through the air pipe on the connected valve A, and seawater can be poured in through valve B to increase the weight load of the variable carrier.

[0010] The balanced force distribution construction step also includes: two infrared beam modules are respectively installed on the transition docking platform and the side of the barge, the signal output terminal of the infrared beam module is connected to the central control, and the central control controls the hydraulic pump system of the hydraulic lifting cylinder; a ramp is installed between the barge and the transition docking platform.

[0011] The roll-on / roll-off loading process includes: four sets of SPMT vehicles are supported by the four legs of the jacket frame and then transported to the transition docking platform, which is supported on the seabed by mounting seats.

[0012] The roll-on / roll-off loading process further includes: the variable carrier being filled with seawater, the weight of which is greater than the total weight of the jacket structure plus the SPMT vehicle; the jacket structure being transported from the transition platform to the barge via the SPMT vehicle; the barge end facing the dock bearing the weight; positioning cables positioning the barge; the variable carrier being pulled up by the barge's cable reel and kept taut; the weight of the jacket structure and SPMT vehicle being balanced by the weight of the variable carrier and the seawater above it; the barge lowering its draft on the sea surface; infrared beam modules installed on the sides of the transition platform and barge sending signals to the central control center; the central control center controlling the hydraulic lifting cylinder to lower; and the height difference between the transition platform and the barge being compensated by the lifting displacement of the SPMT vehicle itself; and the jacket structure being smoothly rolled onto the ship via the SPMT vehicle.

[0013] The beneficial effects of this invention are as follows: when a height difference occurs between the barge and the transition docking platform, causing the gangway to tilt, the hydraulic lifting cylinder descends, and combined with the lifting displacement of the SPMT vehicle itself, it compensates for the height difference between the transition docking platform and the barge, ensuring that the jacket structure is smoothly rolled onto the ship via the SPMT vehicle. This solves the problem that the lifting displacement of the SPMT vehicle itself is insufficient to compensate for the height difference between the barge and the dock, affecting the smooth roll-on loading of the jacket structure. Attached Figure Description

[0014] Figure 1 This is a top view of the distribution of the present invention; Figure 2 This is a side view of the present invention; In the diagram: 1-Dock; 2-Barge; 21-Positioning cable; 22-Cable reel; 3-Variable carrier; 31-Valve A; 32-Air pipe; 33-Pulling cable; 4-Transition docking platform; 41-Hydraulic lifting cylinder; 42-Mounting base; 5-SPMT vehicle; 6-Jacket frame; 7-Infrared beam module; 8-Jumping board; 9-Seabed. Detailed Implementation

[0015] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0016] like Figures 1 to 2 As shown.

[0017] This application discloses a method for rolling-on / roll-off loading of a jacket structure based on balanced forces, comprising the following steps.

[0018] Balanced force distribution setup: Barge 2 is moored to dock 1 on both sides via positioning cables 21. A transition platform 4 is installed between barge 2 and dock 1. A hydraulic lifting cylinder 41 is installed at the bottom of the transition platform 4 and mounted on the seabed 9 via mounting base 42. A variable carrier 3 is installed at the end of barge 2 away from dock 1 via a cable 33. The cable 33 is connected to a cable reel 22 on barge 2, and the variable carrier 3 is thrown onto the seabed 9. The variable carrier 3 is hollow inside and connected to valves A31 and B. Air is drawn from the variable carrier 3 through the air pipe 32 on valve A31, and seawater is injected through valve B to increase the weight load of the variable carrier 3. An infrared beam module 7 is installed between barge 2 and transition platform 4 for height positioning. The signal output of the infrared beam module 7 is connected to a central control unit, which controls the hydraulic pump system of the hydraulic lifting cylinder 41. A gangway 8 is installed between barge 2 and transition platform 4. At this point, a balanced force distribution structure is achieved.

[0019] Roll-on / roll-off loading: Four sets of SPMT vehicles 5 support the four legs of the jacket structure 6 and transport it to the transition platform 4. The transition platform 4 is supported on the seabed 9 by the mounting base 42. The jacket structure 6 is transported to the transition platform 4 by the SPMT vehicles 5. During this process, the transition platform 4 does not experience any height difference. The variable carrier 3 is filled with seawater. The weight of the filled seawater is greater than the total weight load of the jacket structure 6 plus the SPMT vehicles 5. The jacket structure 6 is transported from the transition platform 4 to the barge 2 by the SPMT vehicles 5. The end of the barge 2 facing the dock 1 bears the weight. The positioning cable 21 positions the barge 2. The variable carrier 3 is tightened and connected to the barge 2 by the pull cable 33. The cable reel 22 on the platform balances the weight load of the jacket structure 6 and the SPMT vehicle 5 by utilizing the weight of the variable carrier 3 and the seawater above it. This prevents the barge 2 from tilting due to excessive draft reduction as it approaches the dock 1. As the barge 2 lowers its draft above the sea surface, the infrared beam modules 7 installed on the sides of the transition platform 4 and the barge 2 send signals to the central control center. The central control center then lowers the hydraulic lifting cylinder 41, ensuring that the ramp 8 installed between the barge 2 and the transition platform 4 does not tilt excessively. Combined with the lifting displacement of the SPMT vehicle 5 itself, this compensates for the height difference between the transition platform 4 and the barge 2, ensuring the jacket structure 6 is smoothly rolled onto the ship via the SPMT vehicle 5. This solves the problem that the lifting displacement of the SPMT vehicle itself is insufficient to compensate for the height difference between the barge and the dock, affecting the smooth roll-on / roll-off loading of the jacket structure.

[0020] The top of the jacket foundation 6 can also be lifted using a gantry crane to distribute some of the gravity load. This further ensures that the jacket foundation 6 is smoothly rolled onto the ship via the SPMT vehicle 5.

[0021] The two infrared beam modules 7 are installed on the sides of the transition docking platform 4 and the barge 2 respectively. Only when the two infrared beam modules 7 are aligned at the same height will they not send an abnormality warning signal to the central control center.

[0022] After the jacket 6 is placed on the barge 2, the jacket 6 is fixed on the barge 2. The SPMT vehicle 5 returns from the transition platform 4 to the dock 1. The variable carrier 3 is filled with compressed gas to drain the water and then retracts and separates from the barge 2. The positioning cable 21 is separated from the barge 2. The barge 2, carrying the jacket 6, leaves the dock 1 and heads towards the open ocean.

Claims

1. A method for rolling-on / roll-off loading of a jacketed structure onto a ship based on balanced forces, characterized in that, include: Based on the balanced force distribution structure, the jacket (6) is rolled onto the ship via the SPMT vehicle (5); The balanced force distribution structure is achieved through a balanced force distribution construction step; The steps for constructing the balanced force distribution include: mooring the barge (2) on both sides of the dock (1) with positioning cables (21); installing a transition platform (4) between the barge (2) and the dock (1); installing a hydraulic lifting cylinder (41) at the bottom of the transition platform (4); and installing the hydraulic lifting cylinder (41) on the seabed (9) with a mounting base (42). The balanced force distribution construction steps also include: installing a variable carrier (3) at the end of the barge (2) away from the dock (1) via a cable (33), the cable (33) being connected to a cable reel (22) on the barge (2), and the variable carrier (3) being thrown onto the seabed (9); the variable carrier (3) is hollow inside and connected to valves A (31) and B, the variable carrier (3) can be evacuated through the air pipe (32) on the connected valve A (31), and seawater can be injected through valve B to increase the weight load of the variable carrier (3); The balanced force distribution construction step also includes: two infrared beam modules (7) are installed on the side of the transition docking platform (4) and the barge (2) respectively; the signal output terminal of the infrared beam module (7) is connected to the central control, and the central control controls the hydraulic pump system of the hydraulic lifting cylinder (41); a ramp (8) is installed between the barge (2) and the transition docking platform (4); The roll-on / roll-off loading process includes: four sets of SPMT vehicles (5) are supported by the four legs of the jacket frame (6) and transported to the transition docking platform (4). The transition docking platform (4) is supported on the seabed (9) by the mounting base (42). The roll-on / roll-off loading process further includes: the variable carrier (3) being filled with seawater, the weight of which is greater than the total weight of the jacket (6) plus the SPMT vehicle (5); the jacket (6) being transported from the transition platform (4) to the barge (2) via the SPMT vehicle (5); the barge (2) end facing the dock (1) bearing the weight; the positioning cable (21) positioning the barge (2); and the variable carrier (3) being pulled up by the cable reel (22) on the barge (2) via the cable (33) and always kept in a taut state. (3) The weight and the seawater above the variable carrier (3) are used to balance the weight load of the jacket (6) and the SPMT vehicle (5). The barge (2) is lowered in the sea. The infrared beam module (7) installed on the side of the transition platform (4) and the barge (2) sends a signal to the central control center. The central control center controls the hydraulic lifting cylinder (41) to descend. Combined with the lifting displacement of the SPMT vehicle (5) itself, the height difference between the transition platform (4) and the barge (2) is compensated. The jacket (6) is smoothly rolled onto the ship by the SPMT vehicle (5).

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