Method for hoisting and loading damaged offshore berthing platform to barge

Abstract

The invention relates to the technical field of berthing platform repair, in particular to an offshore damaged berthing platform hoisting and loading method which comprises the following steps: S1, cutting a damaged berthing platform; s2, dividing the barge deck into a first area, a second area and a third area; a first supporting pad, a second supporting pad and a third supporting pad are arranged respectively; s3, hoisting the first berthing platform block, aligning the first berthing platform block to the first supporting pad, enabling the gravity center of the first berthing platform block to fall on the inclined plane, facing the axis direction of the barge, of the first supporting pad, and gradually lowering the first berthing platform block to completely dump the first berthing platform block in the first area; the second berthing platform block and the third berthing platform block are hoisted to the barge; s4, cutting the steel pipe pile, and hoisting the steel pipe pile to a barge; and S5, completing hoisting and loading of the damaged offshore berthing platform. According to the method, stable barge loading of the cut damaged berthing platform can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of repairing a docked platform, and in particular to a method for hoisting and barging a damaged docked platform at sea. Background Art

[0002] Offshore berthing platforms play a vital role in offshore projects, ports, and offshore operations, typically used for ship berthing, cargo loading and unloading, and operational support. However, after long-term operation or external impacts (such as ship collisions), berthing platforms may become structurally tilted or partially damaged. In these cases, the damaged berthing platform must be removed by barge and a new one constructed in or near its original location.

[0003] However, when the mass of the docking platform is huge (for example, more than 800 tons), the local crane vessel cannot lift and remove the docking platform as a whole. Therefore, there is an urgent need for a method to lift the damaged docking platform to a barge. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problem that the damaged berthing platform is too heavy to be hoisted and barged as a whole, and to provide a method for hoisting and barging a damaged berthing platform at sea.

[0005] In a first aspect, the present invention provides a method for lifting and barging a damaged offshore berthing platform, comprising the following steps: S1. Cut the damaged docking platform into three pieces, namely, the first docking platform piece, the second docking platform piece, and the third docking platform piece; S2. Clean the barge deck, dividing the barge deck into a first area for stacking a first berth platform block, a second area for stacking a second berth platform block, and a third area for stacking a third berth platform block; Arranging a first support pad in the first area, the first support pad being inclined toward the axis of the barge; Arrange a second support pad in the second area, the second support pad being used to support the second docking platform block; A third support pad is arranged in the third area, and the third support pad is used to support the third docking platform block; S3. Hoist the first docking platform block, align the first docking platform block with the first pad, so that the center of gravity of the first docking platform block falls on the inclined surface of the first pad toward the axis of the barge, and gradually lower the first docking platform block so that it is completely dumped in the first area; Hoist the second docking platform block and place the second docking platform block on the second support pad; Hoist the third mooring platform block and place it on the third support pad; S4. Cut the steel pipe piles and hoist them onto the barge; S5. Complete the lifting and barging of the damaged berthing platform at sea.

[0006] The method for lifting and barging a damaged offshore berthing platform provided by the present invention decomposes the damaged berthing platform, which has a huge overall weight, into smaller parts, so that the weight of each part is within the capacity of existing lifting equipment, effectively solving the problem of the impracticability of lifting the entire platform and ensuring the operability of the lifting process. Because the first docking platform block had been damaged and rotted, and its center of gravity was located high, to ensure smooth loading of the first docking platform block onto the barge, the first support pads arranged in the first area were tilted toward the barge axis. This allowed the first docking platform block to gradually lower during lifting, with its center of gravity falling on the inclined surface, and eventually being able to completely dump into the first area. This controlled dumping mechanism prevented the first docking platform block from suddenly moving or colliding with the deck, reducing the risk of damage to the barge or the platform block during operation. The bottoms of both the second and third docking platform blocks contain some cut steel pipe piles. Therefore, a second support pad was placed in the second area, and a third support pad was placed in the third area to prop up the docking platform blocks. This prevented interference between the remaining steel pipe piles and the deck, allowing for stable placement without complex adjustments (such as flipping the platform blocks), ensuring a stable placement on the deck. The barge deck is divided into three specific areas (area one, area two and area three), ensuring that the weight of the three berthing platform blocks is evenly distributed on the barge, avoiding the problem of barge tilting or instability due to load concentration.

[0007] Preferably, S1 comprises the following steps: S11. Set up a working platform for construction personnel: Guide rails are installed longitudinally on the top surface of the damaged berthing platform to guide the movement of the hanging plate. Ladders are hung on both ends of the hanging plate, and a hanging platform is installed at the bottom of the ladder. The hanging plate was moved along the guide rails to align with the steel pipe piles. Construction workers entered the suspended platform from the hanging plate and welded supports to the steel pipe piles. After the support welding was completed, the hanging plate was moved to the next steel pipe pile until the supports on both sides of the damaged berthing platform were welded. Construction workers laid walkway boards and installed guardrails between adjacent supports, completing the construction work platform. S12. Construction of longitudinal and transverse beams: Construction personnel enter the construction platform set up in S11 and weld the brackets to the steel pipe piles. After the brackets are welded, weld the longitudinal and transverse beams to the brackets separately. Weld the intersections of the longitudinal and transverse beams as well, ensuring that the top surfaces of the longitudinal and transverse beams are parallel to the bottom surface of the damaged docking platform. The distance between the top surfaces of the longitudinal and transverse beams and the bottom surface of the damaged docking platform is no more than 800 mm. S13. Install tie rods: Based on the positions of the longitudinal and transverse beams installed in S2, drill anchor holes at corresponding locations on the damaged platform. The damaged platform must have at least six anchor holes per longitudinal beam, and at least six anchor holes per transverse beam. Install vertical beams between the damaged platform and the longitudinal or transverse beams, with the number and position of the vertical beams corresponding to the number and position of tie rods. Pass the tie rods through the anchor holes and securely connect them to the corresponding longitudinal or transverse beams. S14. Bonding the damaged berthing platform and steel pipe piles: Based on the location of the steel pipe pile tops, construction personnel used coring equipment to drill a stopper hole from the top of the damaged berthing platform to a depth of 0.5m inside the steel pipe pile core. After installing rebar in the stopper hole, cement grouting was performed. S15. Complete temporary reinforcement of the damaged berthing platform and steel pipe piles; S16. Use a wire saw to cut the damaged docking platform into: a first docking platform block, a second docking platform block, and a third docking platform block.

[0008] Before cutting the damaged docking platform, guide rails are installed longitudinally on the top surface of the docking platform to guide the movement of the hanging plate, and the hanging ladder and the hanging platform are reversely hung through the hanging plate, so that construction workers can directly enter the hanging platform along the hanging ladder from the top surface of the docking platform for construction. This fully utilizes the space on the top of the docking platform and eliminates the need for traditional scaffolding or floating crane equipment, breaking through the limitations of construction equipment in the offshore environment. The hanging plate can move longitudinally along the docking platform, allowing construction workers to flexibly reach different steel pipe pile positions and complete the installation and laying of supports and subsequent walkway boards, thereby improving construction efficiency and applicability.

[0009] A grid framework formed by connecting longitudinal and transverse beams connects multiple steel pipe piles to form a pile-cage structure. The longitudinal and transverse beams are perpendicular to each other, forming a horizontal grid framework that connects the steel pipe piles into a pile-cage structure, enhancing the overall horizontal rigidity and stability of the damaged dock. Tie rods are run from the top of the dock to the longitudinal or transverse beams, working in conjunction with the vertical beams to form a vertical tension-support system. The tie rods provide tension, while the vertical beams provide support, jointly constraining the dock's vertical displacement. This creates a multi-dimensional, integrated force and constraint system in both the horizontal and vertical directions, significantly enhancing the stability of the damaged dock during cutting and providing a solid foundation for the damaged dock's cutting operation.

[0010] By drilling a limit hole from the top of the mooring platform to a depth of 0.5m inside the core of the steel pipe pile and performing cement grouting after installing the steel bars, the connection strength between the mooring platform and the steel pipe pile was enhanced, effectively solving the instability problem caused by the separation of the damaged mooring platform from the bottom steel pipe pile, and further improving the safety of subsequent mooring platform cutting.

[0011] Preferably, in S2, cleaning the barge deck comprises the following steps: Move the fenders, cable releasers and mooring bits stacked on the barge deck to both sides of the deck, unload the barge ashore with a crawler crane, arrange the lifting equipment in order, and clear out the first, second and third areas.

[0012] By cleaning and rearranging the equipment on the deck, the effective use area of ​​the barge deck was maximized, providing ample space for the lifting and stacking of three berthing platform blocks.

[0013] Preferably, in S2, a crossbar is further arranged in the first area, and the crossbar is arranged opposite to the first support pad.

[0014] The crossbeam and the first support pad form a complementary support structure to jointly support the first mooring platform block. After the first mooring platform block tilts, its bottom can be supported by the first support pad and its top can be supported by the crossbeam to prevent the first mooring platform block from causing damage to the deck.

[0015] Preferably, in S2, the first support pad is a strip structure extending along the barge deck, the first support pad includes a top surface and a bottom surface arranged parallel to each other, a first inclined surface and a pad surface are arranged between the top surface and the bottom surface, one end of the first inclined surface is connected to the top surface, and the other end of the first inclined surface is connected to the pad surface, the first inclined surface is inclined toward the axis direction of the barge, the first inclined surface is used to guide the first mooring platform block to fall down, the pad surface is parallel to the bottom surface, and the height of the pad surface is the same as that of the crossbar.

[0016] The top surface is set to be parallel to the bottom surface. During the lowering process of the first mooring platform block, its bottom can first be in stable contact with the top surface, providing a reliable support point for the initial lowering of the platform block, ensuring the stability and safety of the operation; since the center of gravity of the first mooring platform block is biased toward the first inclined surface, as the first mooring platform block continues to be lowered, under the guidance of the first inclined surface, the center of gravity of the first mooring platform block gradually moves toward the axis of the barge, and finally tilts smoothly; after the first mooring platform block tilts, its bottom is located on the cushion surface, and its top is located on the crossbar. The cushion surface is parallel to the bottom surface and has the same height as the crossbar, providing a flat support surface for the platform block, ensuring that the first mooring platform block is stably placed on the deck.

[0017] Preferably, in S2, the second support pad includes two first strip-shaped pads and a plurality of first truncated cone-shaped pads, the two first strip-shaped pads are arranged opposite to each other, and the first truncated cone-shaped pad is arranged between the two first strip-shaped pads.

[0018] Since a part of the cut steel pipe piles remains at the bottom of the second mooring platform block, the relatively arranged first strip pads are used to support the two ends of the second mooring platform block, and the first truncated cone pads can be located between the remaining steel pipe piles to provide support for the second mooring platform block. The first strip pads and the first truncated cone pads form multi-point supports, which can effectively prevent the second mooring platform block from tilting or sliding, and ensure that the dismantled second mooring platform block is stably placed on the deck.

[0019] Preferably, in S2, the third support pad includes two second strip-shaped pads and a plurality of second truncated cone-shaped pads, the two second strip-shaped pads are arranged opposite to each other, and the second truncated cone-shaped pad is arranged between the two second strip-shaped pads.

[0020] Since a part of the cut steel pipe piles remains at the bottom of the third mooring platform block, the relatively arranged second strip pads are used to support the two ends of the third mooring platform block, and the second truncated cone pads can be located between the remaining steel pipe piles to provide support for the third mooring platform block. The second strip pads and the second truncated cone pads form multi-point supports, which can effectively prevent the third mooring platform block from tilting or sliding, and ensure that the dismantled third mooring platform block is stably placed on the deck.

[0021] Preferably, S3 includes the following steps: Arrange a lifting point on the top of the first mooring platform block, lift the first mooring platform block, align the bottom of the first mooring platform block with the first support pad, so that the center of gravity of the first mooring platform block falls on the inclined surface of the first support pad toward the axis of the barge, gradually lower the first mooring platform block while the barge moves in the opposite direction of the first mooring platform block, so that the first mooring platform block is completely tilted into the first area; Drill two lifting holes on both sides of the second docking platform block, insert a pin into each lifting hole, connect the pin to the lifting beam using a wire rope, horizontally lift the second docking platform block, and place the second docking platform block on the second support pad; Drill two lifting holes on both sides of the third mooring platform block, insert a pin into each lifting hole, use a wire rope to connect the pin to the lifting beam, horizontally lift the third mooring platform block, and place the third mooring platform block on the third support pad.

[0022] The inclined surface guides the platform block's center of gravity to shift gradually. Combined with the barge's reverse movement, this ensures a smooth and controllable dumping process, avoiding sudden dumping or collision caused by excessively rapid center of gravity shift, and reducing operational risks. For the second and third mooring platform blocks, two lifting holes are set on both sides of the platform blocks to ensure the symmetry and balance of the lifting points. Combined with the firm connection of the pins and wire ropes, the horizontal and stable lifting of the platform blocks is achieved, preventing tilting or rotation during the lifting process, ensuring that the second and third mooring platform blocks can be smoothly barged.

[0023] Preferably, the angle between the top surface of the second docking platform block and the steel wire rope is 70°~80°; the angle between the top surface of the third docking platform block and the steel wire rope is 70°~80°.

[0024] Since there are steel pipe piles at the bottom of the second and third mooring platform blocks, the center of gravity may be unevenly distributed. By optimizing the angle between the wire rope and the top surface of the platform block, the posture of the platform block can be effectively controlled and the stability during the lifting process can be enhanced.

[0025] Preferably, S4 includes the following steps: Divers went into the water to complete the underwater cutting of the steel pipe piles, used double hooks to lift the steel pipe piles to a horizontal state, cut the baffle of the barge deck, and placed the steel pipe piles flat on the barge deck.

[0026] Double-hook lifting facilitates adjusting the vertical steel pipe piles to a horizontal position, reducing swing or instability during the lifting process and facilitating subsequent placement on the barge deck. Because the steel pipe piles are longer than the barge width, the barge deck is equipped with a cutout panel to provide ample space for the piles.

[0027] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a method for lifting and barging a damaged offshore berthing platform. This method breaks down the heavily weighted damaged berthing platform into smaller parts, ensuring that the weight of each part is within the capacity of existing lifting equipment. This effectively solves the problem of the infeasibility of lifting the entire platform and ensures the operability of the lifting process. 2. The present invention provides a method for hoisting a damaged offshore docking platform onto a barge. A first support pad arranged in a first area is tilted toward the barge axis, allowing the first docking platform block to gradually lower during hoisting, with its center of gravity falling on the inclined surface, ultimately allowing it to completely tip over into the first area. This controlled tipping mechanism prevents the first docking platform block from suddenly moving or colliding with the deck, reducing the risk of damage to the barge or the platform block during operation. 3. The present invention provides a method for hoisting and barging a damaged offshore berthing platform. A second support pad is arranged in the second area, and a third support pad is arranged in the third area to raise the berthing platform block. This prevents interference between the remaining steel pipe piles and the deck. Stable placement can be achieved without complex adjustments (such as flipping the platform block), ensuring that the platform block is placed stably on the deck. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Cutting diagram of the damaged docking platform; Figure 2 Schematic diagram of the barge deck area division; Figure 3 Schematic diagram of setting the first, second and third support pads for the barge deck; Figure 4 Schematic diagram of the first support structure; Figure 5 This is a schematic diagram of the first berthing platform block, the second berthing platform block, and the third berthing platform block after all being barged in; Figure 6 This is a schematic diagram of the first docking platform block being laid down; Figure 7 This is the side view of the second docking platform block being hoisted; Figure 8 This is the main view of the second docking platform block being hoisted; Figure 9 This is a partial enlarged schematic diagram of the latch; Figure 10 This is the side view of the hoisting of the third docking platform block; Figure 11 This is the main view of the hoisting of the third docking platform block; Figure 12 Schematic diagram of longitudinal and transverse beam arrangement; Figure 13 for Figure 12 Cross-sectional view in the AA direction; Figure 14 for Figure 12 Cross-sectional view in the middle BB direction; Figure 15 This is a schematic diagram of the working platform for construction workers.

[0029] Markings in the figure: 11-Guide rail, 12-Hanging plate, 13-Hanging ladder, 14-Suspended platform, 15-Support, 16-Walkway board, 17-Guardrail, 21-Longitudinal beam, 22-Horizontal beam, 23-Vertical beam, 3-Bracket, 4-Pull rod, 51-Latch, 52-Wire rope, 53-Lifting beam, 100-Damaged docking platform, 101-First docking platform block, 102-Second docking platform block, 103-Third docking platform block, 200-Barge, 201-First area, 2011-first support pad, 20111-top surface, 20112-bottom surface, 20113-first inclined surface, 20114-pad surface, 2012-crossbar, 202-second area, 2021-second support pad, 20211-first strip pad, 20212-first truncated cone pad, 203-third area, 2031-third support pad, 20311-second strip pad, 20312-second truncated cone pad, 300-steel pipe pile. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments, as all technologies implemented based on the present invention fall within the scope of the present invention.

[0031] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or positional relationship, such as "upper", "lower", "left", "right", "center", "inside", and "outside", are based on the expressions of the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the invented product / device / apparatus is placed when it is conventionally used. These terms of orientation or positional relationship are merely for the purpose of facilitating the description of the scheme of the present invention or simplifying the description of the specific embodiments to facilitate the rapid understanding of the scheme by technicians, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship, and therefore should not be understood as limiting the present invention.

[0032] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present invention.

[0033] In addition, the expressions “first”, “second”, “third”, etc. in the terms are merely used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0034] In addition, in the description of the embodiments of the present invention, "several," "plurality," and "a number" represent at least two. It can also be any number such as two, three, four, five, six, seven, eight, nine, or even more than nine.

[0035] Furthermore, in the description of the technical solution of the present invention, unless otherwise expressly specified, defined, or limited, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welded, riveted, bolted, threaded, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communicative; they may be direct, indirect via an intermediate medium, or internally connected between two components.

[0036] Example 1 This embodiment provides a method for lifting and barging a damaged offshore berthing platform, comprising the following steps: S1. Figure 1 As shown, the damaged docking platform 100 is cut into three pieces, namely a first docking platform piece 101 , a second docking platform piece 102 and a third docking platform piece 103 .

[0037] S2. Clean the deck of barge 200, such as Figure 2 As shown, the deck of the barge 200 is divided into a first area 201 for stacking the first docking platform block 101 , a second area 202 for stacking the second docking platform block 102 , and a third area 203 for stacking the third docking platform block 103 .

[0038] Specifically, the fenders, quick releases, and bollards removed from the damaged docking platform 100, stacked on the deck of the barge 200, were moved to both sides of the deck. The crawler crane was then used to unload the barge ashore. The lifting equipment (e.g., lifting beams, shackles, lifting straps, wire ropes, etc.) was then arranged to create the first, second, and third areas 201, 202, and 203. By clearing and rearranging the equipment on the deck, the effective area of ​​the barge 200 deck was maximized, providing ample space for the lifting and stacking of the three docking platform blocks.

[0039] A first support pad 2011 is arranged in the first area 201, and the first support pad 2011 is inclined toward the axis direction of the barge 200. Figure 3 As shown, the first area 201 is further provided with crossbars 2012, which are arranged opposite the first support pads 2011. The crossbars 2012 and the first support pads 2011 form a complementary support structure, jointly supporting the first docking platform block 101. After the first docking platform block 101 falls, its bottom can be supported by the first support pads 2011, and its top can be supported by the crossbars 2012, thereby preventing the first docking platform block 101 from damaging the deck.

[0040] Further, such as Figure 4 As shown, the first support pad 2011 is a strip structure extending along the deck of the barge 200. The first support pad 2011 includes a top surface 20111 and a bottom surface 20112 arranged parallel to each other. A first inclined surface 20113 and a pad surface 20114 are arranged between the top surface 20111 and the bottom surface 20112. One end of the first inclined surface 20113 is connected to the top surface 20111, and the other end of the first inclined surface 20113 is connected to the pad surface 20114. The first inclined surface 20113 is inclined toward the axial direction of the barge 200. The first inclined surface 20113 is used to guide the first mooring platform block 101 to fall down. The pad surface 20114 is parallel to the bottom surface 20112, and the height of the pad surface 20114 is the same as that of the crossbar 2012.

[0041] The top surface 20111 is set to be parallel to the bottom surface 20112. During the lowering process of the first mooring platform block 101, its bottom can first be in stable contact with the top surface 20111, providing a reliable support point for the initial lowering of the platform block, ensuring the stability and safety of the operation; since the center of gravity of the first mooring platform block 101 is biased toward the first inclined surface 20113, as the first mooring platform block 101 continues to be lowered, under the guidance of the first inclined surface 20113, the center of gravity of the first mooring platform block 101 gradually moves toward the axis direction of the barge 200, and finally tilts steadily; after the first mooring platform block 101 tilts, its bottom is located on the cushion surface 20114, and its top is located on the crossbar 2012. The cushion surface 20114 is parallel to the bottom surface 20112 and is at the same height as the crossbar 2012, providing a flat support surface for the platform block, ensuring that the first mooring platform block 101 is stably placed on the deck.

[0042] like Figure 3 As shown, a second support pad 2021 is arranged in the second area 202 , and the second support pad 2021 is used to support the second docking platform block 102 .

[0043] Specifically, the second support pad 2021 includes two first strip-shaped pads 20211 and a plurality of first truncated cone-shaped pads 20212 . The two first strip-shaped pads 20211 are arranged opposite to each other, and the first truncated cone-shaped pad 20212 is arranged between the two first strip-shaped pads 20211 .

[0044] Since a portion of the cut steel pipe piles 300 remain at the bottom of the second docking platform block 102, the first strip pads 20211 arranged opposite each other are used to support the two ends of the second docking platform block 102, and the first truncated cone pads 20212 can be located between the remaining steel pipe piles 300 to provide support for the second docking platform block 102. The first strip pads 20211 and the first truncated cone pads 20212 form a multi-point support, which can effectively prevent the second docking platform block 102 from tilting or sliding, ensuring that the removed second docking platform block 102 is stably placed on the deck. It can be understood that in this embodiment, the height of the first strip pads 20211 and the first truncated cone pads 20212 can be slightly higher than the height of the remaining steel pipe piles 300.

[0045] like Figure 3 As shown, a third support pad 2031 is arranged in the third area 203 , and the third support pad 2031 is used to support the third docking platform block 103 .

[0046] Specifically, the third support pad 2031 includes two second strip-shaped pads 20311 and a plurality of second truncated cone-shaped pads 20312 . The two second strip-shaped pads 20311 are arranged opposite to each other, and the second truncated cone-shaped pad 20312 is arranged between the two second strip-shaped pads 20311 .

[0047] Since a part of the cut steel pipe piles 300 remains at the bottom of the third mooring platform block 103, the relatively arranged second strip pads 20311 are used to support the two ends of the third mooring platform block 103, and the second truncated cone pads 20312 can be located between the remaining steel pipe piles 300 to provide support for the third mooring platform block 103. The second strip pads 20311 and the second truncated cone pads 20312 form multi-point support, which can effectively prevent the third mooring platform block 103 from tilting or sliding, and ensure that the dismantled third mooring platform block 103 is stably placed on the deck.

[0048] S3. Figure 6 As shown, the first mooring platform block 101 is hoisted and aligned with the first support pad 2011 so that the center of gravity of the first mooring platform block 101 falls on the inclined surface of the first support pad 2011 toward the axis of the barge 200, and the first mooring platform block 101 is gradually lowered so that it is completely dumped into the first area 201.

[0049] Specifically, the method may be as follows: a lifting point is arranged on the top of the first mooring platform block 101, the first mooring platform block 101 is hoisted, the bottom of the first mooring platform block 101 is aligned with the first support pad 2011, so that the center of gravity of the first mooring platform block 101 falls on the inclined surface of the first support pad 2011 toward the axis of the barge 200, the first mooring platform block 101 is gradually lowered, and the barge 200 moves in the opposite direction of the first mooring platform block 101, so that the first mooring platform block 101 is completely tilted into the first area 201. The inclined surface guides the center of gravity of the platform block to gradually shift, and combined with the reverse movement of the barge 200, this ensures a smooth and controllable tilting process, avoids sudden tilting or collision caused by excessively rapid center of gravity shift, and reduces operational risks.

[0050] The second docking platform block 102 is hoisted and placed on the second support pad 2021 .

[0051] Specifically, it can be Figure 7 、 Figure 8 、 Figure 9 As shown: two lifting holes are drilled on both sides of the second docking platform block 102, a pin 51 is inserted into each lifting hole, and a wire rope 52 is used to connect the pin 51 to the lifting beam 53, and the second docking platform block 102 is lifted horizontally and placed on the second support pad 2021.

[0052] like Figure 5 As shown, the third berthing platform block 103 is hoisted and placed on the third supporting pad 2031 .

[0053] Specifically, it can be Figure 10 、 Figure 11As shown: two lifting holes are drilled on both sides of the third docking platform block 103, a pin 51 is inserted into each lifting hole, and the pin 51 is connected to the lifting beam 53 using a wire rope 52, and the third docking platform block 103 is horizontally lifted and placed on the third support pad 2031.

[0054] For the second berthing platform block 102 and the third berthing platform block 103, two lifting holes are set on both sides of the platform blocks to ensure the symmetry and balance of the lifting points. Combined with the firm connection of the pin 51 and the wire rope 52, the horizontal and stable lifting of the platform blocks is achieved, preventing tilting or rotation during the lifting process, ensuring that the second berthing platform block 102 and the third berthing platform block 103 can be smoothly barged.

[0055] Further, such as Figure 8 As shown, the angle ∠α1 between the top surface of the second docking platform block 102 and the steel wire rope 52 is 70°~80°, preferably 70°. Figure 11 As shown, the angle ∠α2 between the top surface of the third docking platform block 103 and the steel wire rope 52 is 70° to 80°, preferably 76.4°. Because the steel pipe piles 300 remain at the bottom of the second and third docking platform blocks 103, this can lead to uneven center of gravity distribution. By optimizing the angle between the steel wire rope 52 and the top surface 20111 of the platform blocks, the posture of the platform blocks can be effectively controlled, enhancing stability during the lifting process.

[0056] S4. Cut the steel pipe pile 300 and hoist the steel pipe pile 300 onto the barge 200.

[0057] Specifically, divers can dive into the water to complete underwater cutting of the steel pipe pile 300, then use a double hook to hoist the steel pipe pile 300 to a horizontal position. The baffles on the deck of the barge 200 are then cut, and the steel pipe pile 300 is then placed flat on the deck of the barge 200. The double hook hoist facilitates adjusting the vertical steel pipe pile 300 to a horizontal position, reducing sway or instability during the hoisting process and facilitating subsequent placement flat on the deck of the barge 200. Because the steel pipe pile 300 is longer than the width of the barge 200, cutting the baffles creates ample space on the deck of the barge 200 for the steel pipe pile 300.

[0058] S5. Complete the lifting and barging of the damaged berthing platform at sea.

[0059] The method for lifting and barging a damaged berthing platform at sea provided in this embodiment decomposes the damaged berthing platform 100, which has a huge overall weight, into smaller parts, so that the weight of each part is within the capacity of existing lifting equipment. This effectively solves the problem of the infeasibility of lifting the entire platform and ensures the operability of the lifting process. Because the damaged bottom of the first docking platform block 101 has rotted away, and its center of gravity is located high, to ensure smooth loading of the first docking platform block 101 onto the barge, the first support pads 2011 arranged in the first area 201 are tilted toward the axis of the barge 200. This allows the first docking platform block 101 to gradually lower during hoisting, with its center of gravity falling on the inclined surface, and ultimately completely dumping onto the first area 201. This controlled dumping mechanism prevents the first docking platform block 101 from suddenly moving or colliding with the deck, reducing the risk of damage to the barge 200 or the platform block during operation.

[0060] A portion of the cut steel pipe piles 300 remains at the bottom of the second docking platform block 102 and the third docking platform block 103. Therefore, a second support pad 2021 is arranged in the second area 202 and a third support pad 2031 is arranged in the third area 203 to raise the docking platform blocks, thereby avoiding interference between the remaining steel pipe piles 300 and the deck. Stable placement can be achieved without complex adjustments (such as flipping the platform blocks), ensuring that the platform blocks are stably placed on the deck.

[0061] The deck of the barge 200 is divided into three specific areas (a first area 201, a second area 202 and a third area 203), ensuring that the weight of the three docking platform blocks is evenly distributed on the barge 200, thereby avoiding the problem of tilting or instability of the barge 200 due to load concentration.

[0062] Example 2 Based on Example 1, this example describes the specific steps of S1.

[0063] The method for lifting and barging a damaged offshore berthing platform provided in this embodiment, S1, includes the following steps: S11. Figure 15 As shown, set up the construction workers' working platform: A guide rail 11 is installed longitudinally on the top surface of the damaged mooring platform 100. The guide rail 11 is used to guide the movement of the hanging plate 12. Ladders 13 are hung on both ends of the hanging plate 12. The ladder 13 extends downward from the top surface of the damaged mooring platform 100. A hanging platform 14 is installed at the bottom of the ladder 13. The hanging platform 14 can extend toward the steel pipe pile 300 to facilitate construction workers to stand on the hanging platform 14 for welding operations.

[0064] The hanging plate 12 is moved along the guide rail 11 to align with the steel pipe pile 300. The construction workers enter the suspension platform 14 from the hanging plate 12 and weld the support 15 on the steel pipe pile 300. After the support 15 is welded, the hanging plate 12 is moved to the next steel pipe pile 300 until the support 15 on both sides of the damaged berthing platform 100 is welded. The construction workers lay the walkway slab 16 between adjacent supports 15 and install the guardrail 17, completing the construction workers' work platform. S12. Figures 12 to 14As shown, the longitudinal beams 21 and transverse beams 22 are constructed: the construction workers enter the construction work platform set up in S11 and weld the bracket 3 to the steel pipe pile 300. After the bracket 3 is welded, the longitudinal beams 21 and transverse beams 22 are welded to the bracket 3 respectively. The intersection of the longitudinal beams 21 and transverse beams 22 is also welded, so that the top surfaces of the longitudinal beams 21 and transverse beams 22 are parallel to the bottom surface of the damaged docking platform 100, and the distance between the top surfaces of the longitudinal beams 21 and transverse beams 22 and the bottom surface of the damaged docking platform 100 is no more than 800 mm. S13. Install the tie rods 4: Drill anchor holes at corresponding positions on the damaged docking platform 100 based on the positions of the longitudinal beams 21 and transverse beams 22 installed in S2. The number of anchor holes corresponding to each longitudinal beam 21 on the damaged docking platform 100 is not less than six, and the number of anchor holes corresponding to each transverse beam 22 on the damaged docking platform 100 is not less than six. Install vertical beams 23 between the damaged docking platform 100 and the longitudinal beams 21 or transverse beams 22. The number and position of the vertical beams 23 correspond to the number and position of the tie rods 4. Pass the tie rods 4 through the anchor holes and securely connect them to the corresponding longitudinal beams 21 or transverse beams 22. S14. Bonding the damaged berthing platform 100 and steel pipe pile 300: Based on the position of the top of the steel pipe pile 300, construction personnel use coring equipment (such as a drilling machine or a coring drill bit) to drill a limit hole from the top of the damaged berthing platform 100 to a depth of 0.5m inside the core of the steel pipe pile 300. After installing steel bars in the limit hole, the limit hole is grouting cement; S15. Complete temporary reinforcement of the damaged berthing platform 100 and steel pipe piles 300; S16 . Use a wire saw to cut the damaged docking platform 100 into a first docking platform block 101 , a second docking platform block 102 and a third docking platform block 103 .

[0065] Before cutting the damaged mooring platform 100, a guide rail 11 is installed longitudinally on the top surface of the damaged mooring platform 100 to guide the movement of the hanging plate 12, and the hanging ladder 13 and the hanging platform 14 are reversely hung through the hanging plate 12, so that construction workers can directly enter the hanging platform 14 along the hanging ladder 13 from the top surface of the damaged mooring platform 100 for construction, thereby making full use of the space on the top of the damaged mooring platform 100, eliminating the need for traditional scaffolding or floating crane equipment, and breaking through the limitations of construction equipment in the offshore environment; the hanging plate 12 can move longitudinally along the damaged mooring platform 100, so that construction workers can flexibly reach different steel pipe piles 300 positions, complete the installation and laying of the support 15 and subsequent walkway plates 16, and improve construction efficiency and applicability.

[0066] The grid frame formed by connecting the longitudinal beams 21 and transverse beams 22 connects the multiple steel pipe piles 300 to form a pile-clamping structure. The longitudinal beams 21 and transverse beams 22 are perpendicular to each other, forming a horizontal grid frame. The steel pipe piles 300 are connected to form a pile-clamping structure, which enhances the overall horizontal rigidity and stability of the damaged docking platform 100. The tie rods 4 are extended from the top surface 20111 of the docking platform to the longitudinal beams 21 or transverse beams 22, and cooperate with the vertical beams 23 to form a vertical tension-support system. The tie rods 4 provide tension, and the vertical beams 23 provide support force, which together restrain the vertical displacement of the docking platform. This forms a multi-dimensional comprehensive force and constraint system in the horizontal and vertical directions, significantly enhancing the stability of the damaged docking platform 100 during the cutting process and providing a solid foundation for the cutting operation of the damaged docking platform 100.

[0067] By drilling a limit hole from the top of the berthing platform to a depth of 0.5m inside the core of the steel pipe pile 300 and performing cement grouting after installing the steel bars, the connection strength between the berthing platform and the steel pipe pile 300 is enhanced, effectively solving the instability problem caused by the separation of the damaged berthing platform 100 and the bottom steel pipe pile 300, and further improving the safety of subsequent berthing platform cutting.

[0068] 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 and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for lifting and barging a damaged offshore platform, characterized in that: The following steps are involved: S1. Cutting the damaged berthing platform (100) into three pieces, namely a first berthing platform piece (101), a second berthing platform piece (102) and a third berthing platform piece (103); S2. cleaning the deck of the barge (200), dividing the deck of the barge (200) into a first area (201) for stacking the first docking platform block (101), a second area (202) for stacking the second docking platform block (102), and a third area (203) for stacking the third docking platform block (103); A first support pad (2011) is arranged in the first area (201), and the first support pad (2011) is inclined toward the axis of the barge (200); A second support pad (2021) is arranged in the second area (202), and the second support pad (2021) is used to support the second docking platform block (102); A third support pad (2031) is arranged in the third area (203), and the third support pad (2031) is used to support the third docking platform block (103); S3. hoisting the first mooring platform block (101), aligning the first mooring platform block (101) with the first support pad (2011), so that the center of gravity of the first mooring platform block (101) falls on the inclined surface of the first support pad (2011) in the direction of the axis of the barge (200), and gradually lowering the first mooring platform block (101) so that it is completely dumped into the first area (201); hoisting the second docking platform block (102), and placing the second docking platform block (102) on the second support pad (2021); Hoisting the third berthing platform block (103), and placing the third berthing platform block (103) on the third support pad (2031); S4. Cutting the steel pipe pile (300), hoisting the steel pipe pile (300) to the barge (200); S5. Complete the lifting and barging of the damaged berthing platform at sea.

2. The method for lifting and barging a damaged offshore berthing platform according to claim 1, characterized in that: S1 includes the following steps: S11. Set up a working platform for construction personnel: A guide rail (11) is installed longitudinally on the top surface of the damaged berthing platform (100), the guide rail (11) is used to guide the movement of the hanging plate (12), and a hanging ladder (13) is hung on both ends of the hanging plate (12), and a hanging platform (14) is installed at the bottom of the hanging ladder (13); The hanging plate (12) is moved along the guide rail (11) to align with the steel pipe pile (300), and the construction personnel enter the hanging platform (14) from the hanging plate (12) and weld the support (15) on the steel pipe pile (300). After the support (15) is welded, the hanging plate (12) is moved to the next steel pipe pile (300) until the support (15) on both sides of the damaged berthing platform (100) is welded. The construction personnel lay the walkway board (16) between the adjacent supports (15) and install the guardrail (17), thus completing the construction personnel working platform. S12. Construction of longitudinal beams (21) and transverse beams (22): Construction personnel enter the construction personnel work platform set up in S11 and weld the bracket (3) to the steel pipe pile (300). After the bracket (3) is welded, the longitudinal beams (21) and transverse beams (22) are welded to the bracket (3) respectively. The intersection of the longitudinal beams (21) and transverse beams (22) is also welded so that the top surfaces of the longitudinal beams (21) and transverse beams (22) are parallel to the bottom surface of the damaged berthing platform (100). The distance between the top surfaces of the longitudinal beams (21) and transverse beams (22) and the bottom surface of the damaged berthing platform (100) is not greater than 800 mm. S13. Install the tie rods (4): according to the positions of the longitudinal beams (21) and transverse beams (22) installed in S2, drill anchor holes at corresponding positions of the damaged berthing platform (100), the number of anchor holes corresponding to each longitudinal beam (21) of the damaged berthing platform (100) is not less than six, and the number of anchor holes corresponding to each transverse beam (22) of the damaged berthing platform (100) is not less than six; install vertical beams (23) between the damaged berthing platform (100) and the longitudinal beams (21) or transverse beams (22), the number and position of the vertical beams (23) corresponding to the number and position of the tie rods (4), and after the tie rods (4) pass through the anchor holes, they are fixedly connected to the corresponding longitudinal beams (21) or transverse beams (22); S14. Bonding the damaged berthing platform (100) and the steel pipe pile (300): Based on the position of the top of the steel pipe pile (300), the construction personnel use coring equipment to drill a limit hole from the top of the damaged berthing platform (100) to a depth of 0.5 m inside the core of the steel pipe pile (300), install steel bars in the limit hole, and then perform cement grouting on the limit hole; S15. Complete temporary reinforcement of the damaged berthing platform (100) and steel pipe piles (300); S16. Use a wire saw to cut the damaged docking platform (100) into: a first docking platform block (101), a second docking platform block (102) and a third docking platform block (103).

3. The method for lifting and barging a damaged offshore berthing platform according to claim 1, characterized in that: In S2, the deck of the barge (200) is cleaned, including the following steps: The fenders, cable releasers, and mooring bits stacked on the deck of the barge (200) are moved to both sides of the deck, the crawler crane is used to unload the barge ashore, the lifting equipment is arranged in order, and the first area (201), the second area (202), and the third area (203) are cleared.

4. The method for lifting and barging a damaged offshore berthing platform according to claim 1, characterized in that: In S2, a crossbar (2012) is further arranged in the first area (201), and the crossbar (2012) is arranged opposite to the first support pad (2011).

5. The method for lifting and barging a damaged offshore berthing platform according to claim 4, characterized in that: In S2, the first support pad (2011) is a strip structure extending along the deck of the barge (200), and the first support pad (20111) includes a top surface (20111) and a bottom surface (20112) arranged parallel to each other. A first inclined surface (20113) and a pad surface (20114) are arranged between the top surface (20111) and the bottom surface (20112). One end of the first inclined surface (20113) is connected to the top surface (20111), and the other end of the first inclined surface (20113) is connected to the pad surface (20114). The first inclined surface (20113) is inclined toward the axis direction of the barge (200), and the first inclined surface (20113) is used to guide the first docking platform block (101) to fall down. The pad surface (20114) is parallel to the bottom surface (20112), and the height of the pad surface (20114) is the same as that of the crossbar (2012).

6. The method for lifting and barging a damaged offshore berthing platform according to claim 1, characterized in that: In S2, the second support pad (2021) comprises two first strip-shaped pads (20211) and a plurality of first truncated cone-shaped pads (20212), the two first strip-shaped pads (20211) being arranged opposite to each other, and the first truncated cone-shaped pad (20212) being arranged between the two first strip-shaped pads (20211).

7. The method for lifting and barging a damaged offshore berthing platform according to claim 6, characterized in that: In S2, the third support pad (2031) comprises two second strip-shaped pads (20311) and a plurality of second truncated cone-shaped pads (20312), the two second strip-shaped pads (20311) being arranged opposite to each other, and the second truncated cone-shaped pad (20312) being arranged between the two second strip-shaped pads (20311).

8. The method for lifting and barging a damaged offshore berthing platform according to claim 1, characterized in that: S3 includes the following steps: Arranging a lifting point on the top of the first mooring platform block (101), lifting the first mooring platform block (101), aligning the bottom of the first mooring platform block (101) with the first support pad (2011), so that the center of gravity of the first mooring platform block (101) falls on the inclined surface of the first support pad (2011) toward the axis of the barge (200), gradually lowering the first mooring platform block (101) while the barge (200) moves in the opposite direction of the tilting of the first mooring platform block (101), so that the first mooring platform block (101) is completely tilted into the first area (201); Drill two lifting holes on both sides of the second docking platform block (102), insert a latch (51) into each lifting hole, connect the latch (51) to the lifting beam (53) using a wire rope (52), horizontally lift the second docking platform block (102), and place the second docking platform block (102) on the second support pad (221); Two lifting holes are drilled on both sides of the third berthing platform block (103), a latch (51) is inserted into each lifting hole, a steel wire rope (52) is used to connect the latch (51) to the lifting beam (53), the third berthing platform block (103) is hoisted horizontally, and the third berthing platform block (103) is placed on the third support pad (2031).

9. The method for lifting and barging a damaged offshore berthing platform according to claim 8, characterized in that: The included angle between the top surface of the second mooring platform block (102) and the steel wire rope (52) is 70° to 80°; the included angle between the top surface of the third mooring platform block (103) and the steel wire rope (52) is 70° to 80°.

10. The method for lifting and barging a damaged offshore berthing platform according to claim 1, characterized in that: S4 includes the following steps: The diver goes into the water to complete the underwater cutting of the steel pipe pile (300), uses a double hook to lift the steel pipe pile (300) to a horizontal state, cuts the baffle of the deck of the barge (200), and lays the steel pipe pile (300) flat on the deck of the barge (200).

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