Method for hoisting a barge on a damaged offshore platform
By breaking down the berthing platform into three sections, placing supports on the barge deck, and using wire rope hoisting, the problem of the inability to lift the huge berthing platform as a whole was solved, achieving stable placement and safe hoisting of the platform sections.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CCCC FOURTH HARBOR ENG CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-21
AI Technical Summary
When the berthing platform is too heavy to be lifted and removed as a whole by local crane vessels, there is an urgent need for a method to transport the damaged berthing platform to a barge.
The damaged berthing platform was cut into three sections: the first berthing platform section, the second berthing platform section, and the third berthing platform section. Support pads were placed in three areas on the barge deck. The platform sections were gradually lowered onto the deck using inclined support pads and steel wire ropes. The cutting and adjustment of steel pipe piles were combined to ensure the stable placement of the platform sections.
It effectively solved the problem of the infeasibility of lifting the entire unit, ensured the operability of the lifting process, reduced operational risks, avoided damage to the platform blocks and the deck, and achieved stable placement of the platform blocks.
Smart Images
Figure CN120646158B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of berthing platform repair technology, and in particular to a method for hoisting a damaged offshore berthing platform onto a barge. Background Technology
[0002] Offshore berthing platforms play a vital role in near-shore engineering, port terminals, and offshore operation areas, typically used for ship berthing, cargo loading and unloading, and operational support. However, after prolonged operation or exposure to external impacts (such as accidental ship collisions), berthing platforms may experience structural tilting or localized damage. In such cases, the damaged berthing platform needs to be removed by barge, and a new berthing platform needs to be constructed in or near the original location.
[0003] However, when the berthing platform is very heavy (e.g., over 800 tons), the local crane vessels cannot lift and remove the berthing platform as a whole. Therefore, there is an urgent need for a method that can lift the damaged berthing platform to a barge. Summary of the Invention
[0004] The purpose of this invention is to overcome the problem that when a damaged berthing platform is too heavy to be lifted and loaded onto a barge as a whole, and to provide a method for lifting and loading a damaged berthing platform at sea onto a barge.
[0005] In a first aspect, the present invention provides a method for hoisting a damaged offshore berthing platform onto a barge, comprising the following steps: S1. Cut the damaged berthing platform into three pieces, namely the first berthing platform piece, the second berthing platform piece, and the third berthing platform piece; S2. Clean the barge deck and divide the barge deck into a first area for stacking the first berthing platform block, a second area for stacking the second berthing platform block, and a third area for stacking the third berthing platform block; The first support pad is placed in the first area, and the first support pad is tilted towards the axis of the barge; A second support pad is placed in the second area to support the second berthing platform block. A third support pad is placed in the third area to support the third berthing platform block. S3. Hoist the first berthing platform block, align the first berthing platform block with the first support pad, so that the center of gravity of the first berthing platform block falls on the inclined surface of the first support pad in the direction of the barge's axis, and gradually lower the first berthing platform block so that it completely tilts into the first area. Hoist the second berthing platform block and place it on the second support pad; Hoist the third berthing 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 hoisting and loading of the damaged offshore berthing platform onto the barge.
[0006] The method for lifting and loading a damaged offshore berthing platform provided by this invention breaks down the massively heavy 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. Because the bottom of the first berthing platform block was damaged and rotten, and its center of gravity was located at a high position, in order to ensure the smooth loading of the first berthing platform block onto the barge, the first support pad placed in the first area was tilted towards the barge's axis. This allowed the first berthing platform block to be gradually lowered during hoisting, with its center of gravity resting on the tilted surface, eventually allowing it to completely tip over into the first area. This controlled tipping mechanism prevented the first berthing platform block from suddenly moving or colliding with the deck, reducing the risk of damage to the barge or the platform block during operation. Both the second and third berthing platform blocks have some cut steel pipe piles remaining at their bottoms. Therefore, a second support pad is placed in the second area and a third support pad is placed in the third area to support the berthing platform blocks, thus avoiding interference between the remaining steel pipe piles and the deck. Stable placement can be achieved without complicated adjustments (such as flipping the platform blocks), ensuring that the platform blocks are placed stably on the deck. The barge deck is divided into three specific zones (zone 1, zone 2, and zone 3) to ensure that the weight of the three berthing platform blocks is evenly distributed on the barge, avoiding barge tilting or instability caused by concentrated load.
[0007] Preferably, S1 includes the following steps: S11. Erect a work platform for construction workers: Guide rails are installed longitudinally on the top surface of the damaged berthing platform. The guide rails are used to guide the movement of the hanging plate. Ladders are suspended from both ends of the hanging plate, and a suspension platform is installed at the bottom of the hanging ladder. The hanging plate is moved along the guide rail and aligned with the steel pipe pile. The construction workers enter the suspended platform from the hanging plate and weld the supports on the steel pipe pile. After the supports are welded, the hanging plate is moved to the next steel pipe pile until the supports on both sides of the damaged berthing platform are welded. The construction workers lay walkway slabs and install guardrails between adjacent supports to complete the construction workers' work platform. S12. Construction of longitudinal and transverse beams: Construction personnel enter the construction personnel work platform erected in S11, weld the support to the steel pipe piles, and after the support is welded, weld the longitudinal and transverse beams to the support respectively. Weld the intersection of the longitudinal and transverse beams as well, so that the top surface of the longitudinal and transverse beams is parallel to the bottom surface of the damaged berthing platform, and the distance between the top surface of the longitudinal and transverse beams and the bottom surface of the damaged berthing platform is no more than 800mm. S13. Install tie rods: Based on the positions of the longitudinal beams and transverse beams installed in S2, drill anchor holes at the corresponding positions of the damaged berthing platform. The number of anchor holes corresponding to each longitudinal beam and each transverse beam should be no less than six. Install vertical beams between the damaged berthing platform and the longitudinal or transverse beams. The number and position of the vertical beams should correspond to the number and position of the tie rods. After passing the tie rods through the anchor holes, fix them to the corresponding longitudinal or transverse beams. S14. Adhesion to the damaged berthing platform and steel pipe piles: Based on the position of the top of the steel pipe pile, the construction personnel used a core sampling device to drill a limiting hole from the top of the damaged berthing platform to a depth of 0.5m inside the core of the steel pipe pile. After installing the reinforcing bars in the limiting hole, the limiting hole was grouted with cement. S15. Complete the temporary reinforcement of the damaged berthing platform and steel pipe piles; S16. Use a wire saw to cut the damaged berthing platform into: a first berthing platform block, a second berthing platform block, and a third berthing platform block.
[0008] Before cutting the damaged berthing platform, guide rails are installed longitudinally on the top surface of the berthing platform to guide the movement of the hanging plate. The hanging plate is used to suspend ladders and platforms, allowing construction workers to directly access the suspended platform from the top surface of the berthing platform via the ladders. This makes full use of the space on top of the berthing platform, eliminating the need for traditional scaffolding or floating cranes and overcoming the limitations of construction equipment in near-shore environments. The hanging plate can move longitudinally along the berthing platform, allowing construction workers to flexibly reach different steel pipe pile positions to complete the installation and laying of supports and subsequent walkway slabs, improving construction efficiency and applicability.
[0009] A grid framework formed by connecting longitudinal and transverse beams connects multiple steel pipe piles, creating 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, enhancing the overall horizontal rigidity and stability of the damaged berthing platform. Tie rods extend from the top of the berthing platform to the longitudinal or transverse beams, working in conjunction with the vertical beams to form a vertical tension-bracing system. The tie rods provide tension, and the vertical beams provide support, jointly constraining the vertical displacement of the berthing platform. This creates a multi-dimensional comprehensive force and constraint system in both the horizontal and vertical directions, significantly enhancing the stability of the damaged berthing platform during the cutting process and providing a solid foundation for the cutting operation.
[0010] By drilling a limiting hole from the top of the berthing platform to a depth of 0.5m into the core of the steel pipe pile, installing reinforcing bars, and then grouting with cement, the connection strength between the berthing platform and the steel pipe pile was enhanced. This effectively solved the instability problem caused by the detachment of the damaged berthing platform from the bottom steel pipe pile, and further improved the safety of subsequent berthing platform cutting.
[0011] Preferably, in step S2, cleaning the barge deck includes the following steps: Move the fenders, slackers, and mooring bollards stacked on the barge deck to both sides of the deck, unload the tracked cranes onto the shore, organize the lifting equipment, and clear out the first, second, and third zones.
[0012] By cleaning and rearranging the equipment on the deck, the effective usable area of the barge deck was maximized, providing ample space for the hoisting and stacking of the three berthing platform blocks.
[0013] Preferably, in S2, a crossbeam is also arranged in the first area, with the crossbeam positioned opposite to the first support pad.
[0014] The crossbeam and the first support pad form a complementary support structure, jointly supporting the first berthing platform block. After the first berthing platform block tilts, its bottom can be supported by the first support pad, and its top can be supported by the crossbeam, preventing the first berthing platform block from damaging 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 provided 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 towards the axis of the barge. The first inclined surface is used to guide the first berthing platform block to be laid down. The pad surface is parallel to the bottom surface, and the height of the pad surface is the same as that of the crossbeam.
[0016] With the top and bottom surfaces parallel, the bottom of the first berthing platform block can initially make stable contact with the top surface during its lowering process, providing a reliable support point for the initial lowering and ensuring operational stability and safety. As the center of gravity of the first berthing platform block is biased towards the first inclined plane, as the first berthing platform block continues to be lowered, guided by the first inclined plane, the center of gravity of the first berthing platform block gradually moves towards the axis of the barge, eventually tipping over smoothly. After the first berthing platform block tipps over, its bottom rests on the pad surface, and its top rests on the crossbeam. The pad surface is parallel to the bottom surface and at the same height as the crossbeam, providing a flat support surface for the platform block and ensuring that the first berthing platform block is placed stably on the deck.
[0017] Preferably, in S2, the second support pad includes two first strip-shaped pads and a plurality of first frustum-shaped pads, the two first strip-shaped pads are arranged opposite to each other, and the first frustum-shaped pads are arranged between the two first strip-shaped pads.
[0018] Since some of the cut steel pipe piles remain at the bottom of the second berthing platform block, the first strip-shaped pad is used to support both ends of the second berthing platform block. The first frustum-shaped pad can be located between the remaining steel pipe piles to provide support for the second berthing platform block. The first strip-shaped pad and the first frustum-shaped pad form a multi-point support, which can effectively prevent the second berthing platform block from tilting or sliding, and ensure that the dismantled second berthing 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 frustum-shaped pads, the two second strip-shaped pads are arranged opposite to each other, and the second frustum-shaped pads are arranged between the two second strip-shaped pads.
[0020] Since some of the cut steel pipe piles remain at the bottom of the third berthing platform block, the oppositely arranged second strip-shaped pads are used to support both ends of the third berthing platform block. The second frustum-shaped pads can be located between the remaining steel pipe piles to provide support for the third berthing platform block. The second strip-shaped pads and the second frustum-shaped pads form multi-point support, which can effectively prevent the third berthing platform block from tilting or sliding, and ensure that the dismantled third berthing platform block is stably placed on the deck.
[0021] Preferably, S3 includes the following steps: Lifting points are arranged on the top of the first berthing platform block. The first berthing platform block is lifted and the bottom of the first berthing platform block is aligned with the first support pad. The center of gravity of the first berthing platform block is placed on the inclined surface of the first support pad facing the axis of the barge. The first berthing platform block is gradually lowered while the barge moves in the opposite direction to the first berthing platform block, so that the first berthing platform block is completely tilted into the first area. Drill two lifting holes on each side of the second berthing platform block, insert a pin into each lifting hole, connect the pin to the lifting beam with a steel wire rope, and horizontally lift the second berthing platform block and place it on the second support pad. Drill two lifting holes on each side of the third berthing platform block, insert a pin into each lifting hole, connect the pin to the lifting beam with a wire rope, and horizontally lift the third berthing platform block and place it on the third support pad.
[0022] The inclined surface guides the platform block's center of gravity to gradually shift, combined with the barge's reverse movement, ensuring a smooth and controllable tilting process, avoiding sudden tilting or impact caused by excessively rapid shift of the center of gravity, and reducing operational risks. For the second and third berthing platform blocks, two lifting holes are set on each side of the platform block to ensure the symmetry and balance of the lifting points. Combined with the firm connection of the pins and wire ropes, the platform blocks are lifted horizontally and stably, preventing tilting or rotation during the lifting process and ensuring that the second and third berthing platform blocks can be smoothly loaded onto the barge.
[0023] Preferably, the angle between the top surface of the second berthing platform block and the wire rope is 70°~80°; the angle between the top surface of the third berthing platform block and the wire rope is 70°~80°.
[0024] Since the bottom of the second and third berthing platform blocks has steel pipe piles, 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 hoisting process can be enhanced.
[0025] Preferably, S4 includes the following steps: Divers went underwater to cut the steel pipe piles, used double hooks to lift the steel pipe piles to a horizontal position, cut the barge deck baffles, and laid the steel pipe piles flat on the barge deck.
[0026] Double-hook lifting facilitates the adjustment of vertical steel pipe piles to a horizontal position, reducing swaying or instability during hoisting and making it easier to place them flat on the barge deck. Since the length of the steel pipe piles is greater than the width of the barge, cutting the baffle plate provides ample space for the steel pipe piles on the barge deck.
[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a method for lifting a damaged offshore berthing platform onto a barge. The method breaks down the massive 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 that lifting the entire platform is not feasible and ensures the operability of the lifting process. 2. This invention provides a method for hoisting a damaged berthing platform at sea onto a barge. A first support pad, arranged in a first area, is tilted towards the barge's axis, allowing the first berthing platform block to be gradually lowered during hoisting, with its center of gravity resting on the tilted surface, ultimately allowing it to completely tilt over into the first area. This controlled tilting mechanism avoids sudden movement or collision with the deck of the first berthing platform block, reducing the risk of damage to the barge or platform block during operation. 3. The present invention provides a method for hoisting a damaged offshore berthing platform onto a barge. A second support pad is arranged in a second area and a third support pad is arranged in a third area to support the berthing platform block, thereby avoiding interference between the remaining steel pipe piles and the deck. Stable placement can be achieved without complicated adjustments (such as flipping the platform block), ensuring that the platform block is placed stably on the deck. Attached Figure Description
[0028] Figure 1 A schematic diagram showing the cutting process of the damaged berthing platform; Figure 2 A schematic diagram showing the division of the barge deck area; Figure 3 A schematic diagram showing the installation of the first, second, and third support pads on the barge deck; Figure 4 This is a schematic diagram of the first support structure; Figure 5 This is a schematic diagram showing the status of the first, second, and third berthing platform blocks after they have all been loaded onto the barge. Figure 6 A schematic diagram showing the first berthing platform block being laid down; Figure 7 Side view of the second berthing platform block being hoisted; Figure 8 Main view of the second berthing platform block being hoisted; Figure 9 This is a magnified view of a portion of the latch. Figure 10 Side view of the third berthing platform block being hoisted; Figure 11 Main view of the third berthing platform block being hoisted; Figure 12 A schematic diagram showing the arrangement of longitudinal and transverse beams; Figure 13 for Figure 12 Sectional view along the AA direction; Figure 14 for Figure 12 Sectional view along the BB direction; Figure 15 A schematic diagram of a work platform for construction workers.
[0029] Marked in the image: 11-Guide rail, 12-Hanging plate, 13-Hanging ladder, 14-Suspended platform, 15-Support, 16-Walkway slab, 17-Guardrail, 21-Longitudinal beam, 22-Horizontal beam, 23-Vertical beam, 3-Bracket, 4-Tie rod, 51-Pin, 52-Wire rope, 53-Lifting beam, 100-Damaged berthing platform, 101-First berthing platform block, 102-Second berthing platform block, 103-Third berthing platform block, 200-Barge, 201-First area. 2011-First support pad, 20111-Top surface, 20112-Bottom surface, 20113-First inclined surface, 20114-Padded surface, 2012-Horizontal timber, 202-Second area, 2021-Second support pad, 20211-First strip pad, 20212-First frustum-shaped pad, 203-Third area, 2031-Third support pad, 20311-Second strip pad, 20312-Second frustum-shaped pad, 300-Steel pipe pile. Detailed Implementation
[0030] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0031] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.
[0032] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.
[0033] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.
[0034] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.
[0035] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.
[0036] Example 1 This embodiment provides a method for hoisting a damaged offshore berthing platform onto a barge, including the following steps: S1. As Figure 1 As shown, the damaged berthing platform 100 is cut into three pieces, namely the first berthing platform block 101, the second berthing platform block 102, and the third berthing platform block 103.
[0037] S2. Clean the barge deck 200, such as Figure 2 As shown, the deck of the barge 200 is divided into a first area 201 for stacking the first berthing platform block 101, a second area 202 for stacking the second berthing platform block 102, and a third area 203 for stacking the third berthing platform block 103.
[0038] Specifically, the fenders, quick-release devices, and mooring bollards dismantled from the damaged berthing platform 100, which were stacked on the deck of barge 200, can be moved to both sides of the deck. The tracked cranes can then be unloaded from the barge and brought ashore. The lifting equipment (e.g., lifting beams, shackles, slings, wire ropes, etc.) can be organized, and areas 201, 202, and 203 can be cleared. By clearing and rearranging the equipment on the deck, the effective usable area of barge 200's deck is maximized, providing ample space for the lifting and stacking of the three berthing platform sections.
[0039] A first support pad 2011 is arranged in the first area 201, and the first support pad 2011 is inclined towards the axis of the barge 200. Further, as... Figure 3 As shown, a crossbeam 2012 is also arranged in the first area 201, which is positioned opposite to the first support pad 2011. The crossbeam 2012 and the first support pad 2011 form a complementary support structure, jointly supporting the first berthing platform block 101. After the first berthing platform block 101 tilts, its bottom can be supported by the first support pad 2011, and its top can be supported by the crossbeam 2012, preventing the first berthing platform block 101 from damaging the deck.
[0040] Furthermore, 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 towards the axis of the barge 200. The first inclined surface 20113 is used to guide the first berthing platform block 101 to be lowered. 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 crossbeam 2012.
[0041] With the top surface 20111 and bottom surface 20112 parallel, during the lowering of the first berthing platform block 101, its bottom can first make stable contact with the top surface 20111, providing a reliable support point for the initial lowering of the platform block and ensuring the stability and safety of the operation. Since the center of gravity of the first berthing platform block 101 is biased towards the first inclined surface 20113, as the first berthing platform block 101 continues to be lowered, under the guidance of the first inclined surface 20113, the center of gravity of the first berthing platform block 101 gradually moves towards the axis of the barge 200, and finally tilts smoothly. After the first berthing platform block 101 tilts, its bottom is on the pad surface 20114, and its top is on the crossbeam 2012. The pad surface 20114 is parallel to the bottom surface 20112 and at the same height as the crossbeam 2012, providing a flat support surface for the platform block and ensuring that the first berthing platform block 101 is placed stably on the deck.
[0042] like Figure 3 As shown, a second support pad 2021 is arranged in the second region 202, and the second support pad 2021 is used to support the second berthing platform block 102.
[0043] Specifically, the second support pad 2021 includes two first strip-shaped pads 20211 and several first frustum-shaped pads 20212. The two first strip-shaped pads 20211 are arranged opposite to each other, and the first frustum-shaped pads 20212 are arranged between the two first strip-shaped pads 20211.
[0044] Since a portion of the cut-off steel pipe piles 300 remain at the bottom of the second berthing platform block 102, the first strip-shaped pad 20211, which is positioned opposite to it, is used to support both ends of the second berthing platform block 102. The first frustum-shaped pad 20212 is positioned between the remaining steel pipe piles 300 to provide support for the second berthing platform block 102. The first strip-shaped pad 20211 and the first frustum-shaped pad 20212 form multi-point support, which can effectively prevent the second berthing platform block 102 from tilting or sliding, ensuring that the dismantled second berthing platform block 102 is stably placed on the deck. It can be understood that in this embodiment, the height of the first strip-shaped pad 20211 and the first frustum-shaped pad 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 region 203, and the third support pad 2031 is used to support the third berthing platform block 103.
[0046] Specifically, the third support pad 2031 includes two second strip-shaped pads 20311 and several second frustum-shaped pads 20312. The two second strip-shaped pads 20311 are arranged opposite to each other, and the second frustum-shaped pads 20312 are arranged between the two second strip-shaped pads 20311.
[0047] Since a portion of the cut-off steel pipe piles 300 remain at the bottom of the third berthing platform block 103, the correspondingly arranged second strip-shaped pad 20311 is used to support both ends of the third berthing platform block 103, and the second frustum-shaped pad 20312 can be located between the remaining steel pipe piles 300 to provide support for the third berthing platform block 103. The second strip-shaped pad 20311 and the second frustum-shaped pad 20312 form a multi-point support, which can effectively prevent the third berthing platform block 103 from tilting or sliding, and ensure that the dismantled third berthing platform block 103 is stably placed on the deck.
[0048] S3. For example Figure 6 As shown, the first berthing platform block 101 is hoisted and aligned with the first support pad 2011 so that the center of gravity of the first berthing platform block 101 falls on the inclined surface of the first support pad 2011 in the direction of the axis of the barge 200. The first berthing platform block 101 is gradually lowered so that it is completely tilted into the first area 201.
[0049] Specifically, this can be achieved by: arranging lifting points on the top of the first berthing platform block 101, hoisting the first berthing platform block 101, aligning the bottom of the first berthing platform block 101 with the first support pad 2011, so that the center of gravity of the first berthing platform block 101 falls on the inclined surface of the first support pad 2011 facing the axis of the barge 200; gradually lowering the first berthing platform block 101 while the barge 200 tilts in the opposite direction to the first berthing platform block 101, so that the first berthing platform block 101 is completely tilted into the first area 201. The inclined surface guides the gradual shift of the platform block's center of gravity, combined with the reverse movement of the barge 200, ensuring a smooth and controllable tilting process, avoiding sudden tilting or impact caused by excessively rapid shift of the center of gravity, and reducing operational risks.
[0050] Hoist the second berthing platform block 102 and place it on the second support pad 2021.
[0051] Specifically, it could be like this Figure 7 , Figure 8 , Figure 9 As shown: Drill two lifting holes on each side of the second berthing platform block 102, insert a pin 51 into each lifting hole, use a wire rope 52 to connect the pin 51 to the lifting beam 53, and horizontally lift the second berthing platform block 102 and place the second berthing platform block 102 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 support pad 2031.
[0053] Specifically, it could be like this Figure 10 , Figure 11As shown: Drill two lifting holes on each side of the third berthing platform block 103, insert a pin 51 into each lifting hole, use a wire rope 52 to connect the pin 51 to the lifting beam 53, and horizontally lift the third berthing platform block 103 and place the third berthing platform block 103 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 each side of the platform block 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 platform blocks are lifted horizontally and stably, preventing tilting or rotation during the lifting process and ensuring that the second berthing platform block 102 and the third berthing platform block 103 can be smoothly loaded onto the barge.
[0055] Furthermore, such as Figure 8 As shown, the angle ∠α1 between the top surface of the second berthing platform block 102 and the wire rope 52 is 70°~80°, preferably 70°. Figure 11 As shown, the angle ∠α2 between the top surface of the third berthing platform block 103 and the wire rope 52 is 70°~80°, preferably 76.4°. Since the bottom of the second and third berthing platform blocks 103 has steel pipe piles 300, it may cause uneven distribution of the center of gravity. By optimizing the angle between the wire rope 52 and the top surface 20111 of the platform block, the attitude of the platform block can be effectively controlled, and the stability during the hoisting process can be enhanced.
[0056] S4. Cut 300 steel pipe piles and hoist 300 steel pipe piles to the barge 200.
[0057] Specifically, divers can go underwater to cut the steel pipe pile 300, use double hooks to lift the steel pipe pile 300 to a horizontal position, cut the baffle of the barge 200 deck, and lay the steel pipe pile 300 flat on the barge 200 deck. Double hook lifting facilitates adjusting the vertical steel pipe pile 300 to a horizontal position, reducing swaying or instability during the lifting process and making it easier to lay it flat on the barge 200 deck. Since the length of the steel pipe pile 300 is greater than the width of the barge 200, cutting the baffle provides ample space for the steel pipe pile 300 on the barge 200 deck.
[0058] S5. Complete the hoisting and loading of the damaged offshore berthing platform onto the barge.
[0059] The method for lifting and barge-loading a damaged offshore berthing platform provided in this embodiment breaks down the massively heavy damaged berthing platform 100 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. Because the bottom of the first berthing platform block 101 was damaged and rotten, and its center of gravity was located at a high position, in order to ensure that the first berthing platform block 101 was successfully loaded onto the barge, the first support pad 2011 arranged in the first area 201 was tilted towards the axis of the barge 200. This allowed the first berthing platform block 101 to be gradually lowered during hoisting, with its center of gravity resting on the tilted surface, and eventually able to completely tilt over into the first area 201. This controlled tilting mechanism prevented the first berthing 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] Both the second berthing platform block 102 and the third berthing platform block 103 have some cut steel pipe piles 300 remaining at their bottoms. 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 support the berthing platform blocks, thus avoiding interference between the remaining steel pipe piles 300 and the deck. Stable placement can be achieved without complicated adjustments (such as flipping the platform blocks), ensuring that the platform blocks are placed stably on the deck.
[0061] The deck of barge 200 is divided into three specific areas (area 201, area 202 and area 203) to ensure that the weight of the three berthing platform blocks is evenly distributed on barge 200, avoiding barge 200 tilting or instability caused by concentrated load.
[0062] Example 2 Based on Example 1, this example describes the specific steps of S1.
[0063] The method for hoisting and loading a damaged offshore berthing platform onto a barge provided in this embodiment includes the following steps in S1: S11. For example Figure 15 As shown, a work platform for construction workers is set up: 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. The two ends of the hanging plate 12 are suspended by ladders 13. The ladders 13 extend downward from the top surface of the damaged berthing platform 100. A suspension platform 14 is installed at the bottom of the ladders 13. The suspension platform 14 can extend towards the steel pipe pile 300 to facilitate the construction personnel to stand on the suspension platform 14 to carry out welding operations.
[0064] Move the hanging plate 12 along the guide rail 11 to align it with the steel pipe pile 300. The construction workers enter the suspended platform 14 from the hanging plate 12 and weld the support 15 on the steel pipe pile 300. After the support 15 is welded, move the hanging plate 12 to the next steel pipe pile 300 until the welding of the support 15 on both sides of the damaged berthing platform 100 is completed. The construction workers lay the walkway 16 between the adjacent support 15 and install the guardrail 17 to complete the construction workers' work platform. S12. For example Figures 12-14As shown, for the construction of longitudinal beams 21 and transverse beams 22: Construction workers enter the construction worker work platform erected in S11 and weld the support 3 to the steel pipe pile 300. After the support 3 is welded, the longitudinal beams 21 and transverse beams 22 are welded to the support 3 respectively. The intersection of the longitudinal beams 21 and transverse beams 22 is also welded so that the top surface of the longitudinal beams 21 and transverse beams 22 is parallel to the bottom surface of the damaged berthing platform 100, and the distance between the top surface of the longitudinal beams 21 and transverse beams 22 and the bottom surface of the damaged berthing platform 100 is no more than 800mm. S13. Install tie rod 4: Based on the positions of the longitudinal beams 21 and transverse beams 22 installed in S2, drill anchoring holes at the corresponding positions of the damaged berthing platform 100. The number of anchoring holes corresponding to each longitudinal beam 21 and each transverse beam 22 of the damaged berthing platform 100 shall not be 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 vertical beams 23 shall correspond to the number and position of tie rods 4. After passing the tie rods 4 through the anchoring holes, fix them to the corresponding longitudinal beams 21 or transverse beams 22. S14. Adhesion to the damaged berthing platform 100 and steel pipe pile 300: Based on the position of the top of the steel pipe pile 300, the construction personnel use core sampling equipment (such as a drilling machine or core drill bit) to drill a limiting 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 the reinforcing bars in the limiting hole, the limiting hole is grouted with 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 berthing platform 100 into: a first berthing platform block 101, a second berthing platform block 102, and a third berthing platform block 103.
[0065] Before cutting the damaged berthing platform 100, guide rails 11 are installed longitudinally on the top surface of the damaged berthing platform 100 to guide the movement of the hanging plate 12. The hanging plate 12 is used to suspend the ladder 13 and the suspended platform 14, which allows construction personnel to directly enter the suspended platform 14 from the top surface of the damaged berthing platform 100 via the ladder 13. This makes full use of the space on the top of the damaged berthing platform 100, eliminating the need for traditional scaffolding or floating cranes and overcoming the limitations of construction equipment in near-shore environments. The hanging plate 12 can move longitudinally along the damaged berthing platform 100, allowing construction personnel to flexibly reach different positions of the steel pipe piles 300 to complete the installation and laying of the support 15 and subsequent walkway slabs 16, thus improving construction efficiency and applicability.
[0066] A grid frame formed by connecting longitudinal beams 21 and transverse beams 22 connects multiple steel pipe piles 300 to form a pile-cage structure. The longitudinal beams 21 and transverse beams 22 are perpendicular to each other, forming a horizontal grid frame that connects the steel pipe piles 300 to create a pile-cage structure, enhancing the overall horizontal rigidity and stability of the damaged berthing platform 100. Tie rods 4 extend from the top surface 20111 of the berthing platform to either the longitudinal beams 21 or transverse beams 22, working in conjunction with the vertical beams 23 to form a vertical tension-bracing system. Tie rods 4 provide tension, and vertical beams 23 provide support, jointly constraining the vertical displacement of the berthing platform. This forms a multi-dimensional comprehensive force and constraint system in both the horizontal and vertical directions, significantly enhancing the stability of the damaged berthing platform 100 during the cutting process and providing a solid foundation for the cutting operation.
[0067] By drilling a limiting hole from the top of the berthing platform to a depth of 0.5m into the core of the steel pipe pile 300, installing reinforcing bars, and then grouting with cement, the connection strength between the berthing platform and the steel pipe pile 300 was enhanced. This effectively solved the instability problem caused by the detachment of the damaged berthing platform 100 from the bottom steel pipe pile 300, and further improved 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 within the protection scope of the present invention.
Claims
1. A method for hoisting a damaged offshore berthing platform onto a barge, characterized in that, Includes the following steps: S1. The damaged berthing platform (100) is cut into three pieces, namely the first berthing platform piece (101), the second berthing platform piece (102) and the third berthing platform piece (103). S2. Clean the barge (200) deck and divide the barge (200) deck into a first area (201) for stacking the first berthing platform block (101), a second area (202) for stacking the second berthing platform block (102), and a third area (203) for stacking the third berthing 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); The first area (201) is also equipped with a crossbeam (2012), which is positioned opposite to the first support pad (2011); 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 towards the axis of the barge (200). The first inclined surface (20113) is used to guide the first berthing platform block (101) to be laid 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 crossbeam (2012). A second support pad (2021) is arranged in the second area (202) to support the second berthing platform block (102). The second support pad (2021) includes two first strip pads (20211) and several first frustum pads (20212). The two first strip pads (20211) are arranged opposite to each other, and the first frustum pads (20212) are arranged between the two first strip pads (20211). A third support pad (2031) is arranged in the third area (203) to support the third berthing platform block (103). The third support pad (2031) includes two second strip-shaped pads (20311) and several second frustum-shaped pads (20312). The two second strip-shaped pads (20311) are arranged opposite to each other, and the second frustum-shaped pads (20312) are arranged between the two second strip-shaped pads (20311). S3. Hoist the first berthing platform block (101), align the first berthing platform block (101) with the first support pad (2011), so that the center of gravity of the first berthing 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 lower the first berthing platform block (101) so that it completely tilts into the first area (201). Hoist the second berthing platform block (102) and place the second berthing platform block (102) on the second support pad (2021). Hoist the third berthing platform block (103) and place the third berthing platform block (103) on the third support pad (2031); S4. Cut the steel pipe pile (300) and hoist the steel pipe pile (300) to the barge (200). S5. Complete the hoisting and loading of the damaged offshore berthing platform onto the barge.
2. The method for hoisting a damaged offshore berthing platform onto a barge according to claim 1, characterized in that, S1 includes the following steps: S11. Erect a work platform for construction workers: 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). The two ends of the hanging plate (12) are suspended by a hanging ladder (13). A suspension platform (14) is installed at the bottom of the hanging ladder (13). Move the hanging plate (12) along the guide rail (11) to align with the steel pipe pile (300). The construction workers enter the suspended platform (14) from the hanging plate (12) and weld the support (15) on the steel pipe pile (300). After the support (15) is welded, move the hanging plate (12) 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 the adjacent supports (15) and install the guardrail (17) to complete the construction workers' work platform. S12. Construction of longitudinal beams (21) and transverse beams (22): Construction personnel enter the construction personnel work platform erected in S11 and weld the support (3) to the steel pipe pile (300). After the support (3) is welded, the longitudinal beams (21) and transverse beams (22) are welded to the support (3) respectively. The intersection of the longitudinal beams (21) and transverse beams (22) is also welded so that the top surface of the longitudinal beams (21) and transverse beams (22) is parallel to the bottom surface of the damaged berthing platform (100). The distance between the top surface of the longitudinal beams (21) and transverse beams (22) and the bottom surface of the damaged berthing platform (100) is not greater than 800mm. S13. Install tie rods (4): Based on the positions of the longitudinal beams (21) and transverse beams (22) installed in S12, drill anchor holes at the 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) shall not be less than six, and the number of anchor holes corresponding to each transverse beam (22) of the damaged berthing platform (100) shall not be 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) correspond to the number and position of the tie rods (4). After passing the tie rods (4) through the anchor holes, fix them to the corresponding longitudinal beams (21) or transverse beams (22). S14. Adhere to the damaged berthing platform (100) and steel pipe pile (300): According to the position of the top of the steel pipe pile (300), the construction personnel use core sampling equipment to open a limiting 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 the reinforcing bars in the limiting hole, the limiting hole is grouted with cement. S15. Complete the temporary reinforcement of the damaged berthing platform (100) and steel pipe piles (300); S16. Use a wire saw to cut the damaged berthing platform (100) into: a first berthing platform block (101), a second berthing platform block (102), and a third berthing platform block (103).
3. The method for hoisting a damaged offshore berthing platform onto a barge according to claim 1, characterized in that, In S2, the barge (200) deck is cleaned, including the following steps: Move the fenders, slackers, and mooring bollards stacked on the barge deck (200) to both sides of the deck, unload the tracked barge onto the shore, organize the hoisting equipment, and clear out the first area (201), the second area (202), and the third area (203).
4. The method for hoisting a damaged offshore berthing platform onto a barge according to claim 1, characterized in that, S3 includes the following steps: Lifting points are arranged on the top of the first berthing platform block (101). The first berthing platform block (101) is hoisted and its bottom is aligned with the first support pad (2011). The center of gravity of the first berthing platform block (101) is placed on the inclined surface of the first support pad (2011) facing the axis of the barge (200). The first berthing platform block (101) is gradually lowered while the barge (200) tilts in the opposite direction to the first berthing platform block (101), so that the first berthing platform block (101) is completely tilted in the first area (201). Two lifting holes are drilled on each side of the second berthing platform block (102). A pin (51) is inserted into each lifting hole. The pin (51) is connected to the lifting beam (53) using a steel wire rope (52). The second berthing platform block (102) is horizontally lifted and placed on the second support pad (2021). Two lifting holes are drilled on each side of the third berthing platform block (103). A pin (51) is inserted into each lifting hole. The pin (51) is connected to the lifting beam (53) using a wire rope (52). The third berthing platform block (103) is horizontally lifted and placed on the third support pad (2031).
5. A method for hoisting a damaged offshore berthing platform onto a barge according to claim 4, characterized in that, The angle between the top surface of the second berthing platform block (102) and the wire rope (52) is 70°~80°; the angle between the top surface of the third berthing platform block (103) and the wire rope (52) is 70°~80°.
6. The method for hoisting a damaged offshore berthing platform onto a barge according to claim 1, characterized in that, S4 includes the following steps: Divers went underwater to cut the steel pipe pile (300), used double hooks to lift the steel pipe pile (300) to a horizontal position, cut the baffle of the barge (200) deck, and laid the steel pipe pile (300) flat on the barge (200) deck.