Steel bearing beam for caisson water bag-hydraulic trolley conversion docking and docking construction technology thereof

Abstract

The invention provides a steel cushion beam for caisson water bag-hydraulic trolley conversion docking and a docking construction process thereof, and relates to the technical field of gravity type caisson wharf caisson docking, in particular to the steel cushion beam for caisson water bag-hydraulic trolley conversion docking and the docking construction process thereof. Comprising lower supporting profile steel and upper supporting profile steel which are vertically welded to form integral supporting profile steel, and the two sides of the integral supporting profile steel are symmetrically arranged; a docking track matched with a track wheel at the bottom of the hydraulic trolley is arranged at the upper end of the upper supporting profile steel, and the docking track is fastened to the upper portion of the upper supporting profile steel through a track pressing plate; the bottom of the lower supporting profile steel is placed on the upper portions of the water bag trolley steel rails and fixed between the two water bag trolley rails through a limiting plate. The total height of the docking track, the lower supporting profile steel, the upper supporting profile steel and the hydraulic trolley is consistent with the height of the water bag trolley. The method has the positive effects of reducing the reconstruction work amount of a prefabrication yard, and realizing high efficiency, safety and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of caisson docking at a gravity caisson wharf, and in particular to a steel cushion beam for caisson water bag-hydraulic trolley conversion docking and a docking construction process thereof. Background Art

[0002] Gravity caisson docks are a widely distributed and widely used dock structure in my country. In recent years, with the reduction of gravity dock projects and the continued hot development of offshore wind power projects, some large domestic floating docks have been transformed for offshore wind power installation and construction. During the construction of gravity caisson docks, the floating docks and the prefabrication yard design and shipping processes often do not match. Large-scale renovation and construction of the prefabrication yard pedestal and shipping port are required to meet the docking requirements. The renovation and construction costs are high and the construction period is delayed.

[0003] During the construction of gravity caisson docks, there are three main methods for caisson docking: airbag rolling docking, waterbag trolley docking, and hydraulic trolley docking. The above three construction methods have specific requirements for the prefabrication site pedestal, shipping port layout, and floating dock. Through statistical analysis of the conventional docking process of caissons in similar projects in the past, it is found that the main time consumption and increased cost of the conventional docking process of caissons when the floating dock and the prefabrication site design shipping process do not match are as follows: 1. Airbag rolling docking process: Since airbag rolling docking has high requirements on the flatness of the ground of the prefabrication site and the safety factor is lower than the trolley docking process, most of the prefabrication sites are currently set up according to the trolley docking process, and the prefabrication site pedestal is arranged with a trolley trench that runs through the entire pedestal. The mismatch between the floating dock and the prefabrication site design and shipping process is sudden, and the caisson has been prefabricated. It is impossible to transform the prefabrication site floor into a horizontal surface by airbag rolling. This process is not applicable when the floating dock and the prefabrication site design and shipping process do not match.

[0004] 2. Docking process of water bag trolley: Due to the height difference between the floating dock deck and the pedestal trench, the water bag trolley cannot pass through the junction of the pedestal and the floating dock deck. The elevation of the bottom beam can be lowered to lower the elevation of the floating dock deck surface so that it is flush with the pedestal trench to ensure the docking of the water bag trolley. However, this plan requires the modification of the bottom beam of the prefabrication yard and the reduction of the bottom beam elevation. The construction time is about 60 days and the construction cost is about 2.4 million, which is long and costly.

[0005] 3. Hydraulic trolley docking process: There is a height difference between the floating dock deck and the prefabrication field pedestal trench, which needs to be leveled so that the hydraulic trolley can carry the caisson through the junction of the pedestal and the deck surface to the upper part of the floating dock. Since the caissons on the pedestal are arranged far away from the front edge of the pedestal, and the distance between the rear caisson and the front edge of the pedestal is more than 250 meters, if a hydraulic trolley is used for docking, all four trenches need to be leveled with steel pads. It is initially estimated that 1,000 tons of steel pads will need to be processed, the cost is about 8 million yuan, and the processing cycle takes 80 days, which is costly and long.

[0006] Caisson docking is a prerequisite for caisson shipment and installation. When the conventional caisson docking process is faced with the situation that the floating dock and the prefabrication site design shipment process do not match, a large number of modifications to the prefabrication site are required, which has a long construction period and high cost, affecting the construction of the main tasks of the project and has become a bottleneck restricting the overall progress. Summary of the invention

[0007] The purpose of the present invention is to provide a steel cushion beam for caisson water bag-hydraulic trolley conversion docking and its docking construction process. In view of the disadvantages of conventional caisson docking technology that when facing the situation that the floating dock and the prefabrication yard design and transportation process do not match, a large number of prefabrication sites need to be modified, the construction period is long and the cost is high. Under the premise of reducing the amount of prefabrication site modification work, a new steel cushion beam is developed to combine the water bag trolley docking process with the hydraulic trolley docking process, achieve the large-scale caisson docking construction goal, avoid the mismatch between the floating dock and the prefabrication yard design and transportation process. Extended construction period, reduce the amount of prefabrication yard modification work, and achieve the goals of high efficiency, safety and low cost.

[0008] The steel cushion beam for the caisson water bag-hydraulic trolley conversion docking provided by the present invention includes a lower supporting steel and an upper supporting steel, the lower supporting steel and the upper supporting steel are welded up and down to form an integral supporting steel, and the integral supporting steel is symmetrically arranged on both sides; the upper end of the upper supporting steel is provided with an upper docking track that is compatible with the bottom track wheel of the hydraulic trolley, and the upper docking track is fastened to the upper part of the upper supporting steel through a track pressure plate; the bottom of the lower supporting steel is placed on the upper part of the water bag trolley rail, and is fixed between the two water bag trolley rails through a limit plate; the total height of the upper docking track, the lower supporting steel, the upper supporting steel and the hydraulic trolley is consistent with the height of the water bag trolley.

[0009] Furthermore, a connecting channel steel is arranged between the integral supporting steel sections symmetrically arranged on both sides, a connecting inclined channel steel is arranged between two adjacent connecting channel steels, and the connecting channel steel, the connecting inclined channel steel and the integral supporting steel section form a triangular supporting structure.

[0010] Furthermore, upper ribs and lower ribs are used to support and reinforce the upper and lower wing plates of the lower supporting steel section and the upper and lower wing plates of the upper supporting steel section; upper rib reinforcement plates are arranged on the upper ribs; lower rib reinforcement plates are arranged on the lower ribs; and lifting ears are arranged on the upper supporting steel section.

[0011] Furthermore, both ends of the lower supporting steel and the upper supporting steel are provided with end plates, and the two adjacent sections of steel cushion beams are connected into a whole by connecting bolts.

[0012] The caisson water bag-hydraulic trolley conversion docking construction process provided by the present invention specifically includes the following steps: Step 1: When the caisson is being transported to the dock, the water bag trolley moves the caisson from the rear of the pedestal to the trolley conversion area at the front of the pedestal. After the caisson is placed on the top of the cushion pier, the water bag trolley is withdrawn; Step 2: Install the steel cushion beam for the conversion of the caisson water bag to the hydraulic trolley to the ditch below the caisson, assemble the hydraulic trolley on the floating dock deck simultaneously, connect the hydraulic trolley and the steel cushion beam with a steel wire rope, and use the hydraulic trolley to pull the steel cushion beam to the bottom of the caisson and align it with the steel rail of the floating dock hydraulic trolley; Step 3: The hydraulic trolley can drive from the floating dock deck to the upper part of the steel beam under the caisson by itself. After the hydraulic trolley is in place, it lifts and moves the caisson to the upper part of the floating dock to complete the docking of the caisson.

[0013] Furthermore, in step 1, the floating dock is seated at the outlet of the prefabrication yard. Before the seating, the center line of the floating dock deck should be aligned with the center line of the pedestal to prevent deviation.

[0014] Furthermore, in step 1, some caissons are located behind the pedestal in the prefabrication yard, and are far away from the trolley conversion area at the front of the pedestal; when the caissons are shipped out for installation, a water bag trolley is used to lift the caissons from the rear area to the trolley conversion area at the front of the pedestal; after the caissons arrive at the front area of ​​the pedestal, 2 cm high pads are placed under the caissons in advance, the water bag trolley releases water to place the caisson on top of the pads, and the water bag trolley is withdrawn with the trench cover.

[0015] Furthermore, in step 2, the steel pad beam used for the caisson water bag-hydraulic trolley conversion to dock is assembled in the steel pad beam assembly area behind the caisson. When assembling the steel pad beam, attention should be paid to keeping the connections of each section horizontal; the hydraulic trolley is assembled on the floating dock hydraulic trolley rails.

[0016] Furthermore, in step 2, after the steel cushion beam used for the caisson water bag-hydraulic trolley conversion to dock is assembled, it is connected to the hydraulic trolley assembled on the upper part of the floating dock using a steel wire rope, and the steel cushion beam is towed to the bottom of the caisson using the hydraulic trolley; after the steel cushion beam is towed to the bottom of the caisson and is in place, its front and rear ends are welded and reinforced to prevent displacement when the caisson is docked.

[0017] Furthermore, in step 3, after the assembly of the upper part of the floating dock deck is completed, the hydraulic trolley can drive itself into the upper part of the steel pad beam under the caisson, the hydraulic trolley drives to the bottom of the caisson and lifts up the caisson, and the driving trolley moves the caisson to the upper part of the floating dock deck, so that the caisson sits on the upper part of the pad pier provided by the floating dock, thereby completing the docking of the caisson.

[0018] The steel cushion beam for docking of caisson water bag-hydraulic trolley conversion and the docking construction process thereof provided by the present invention have the following beneficial effects: 1. The steel cushion beam used for the conversion of the caisson water bag-hydraulic trolley for docking of the present invention combines the water bag trolley and the hydraulic trolley through the steel cushion beam. The caisson is moved from the rear of the pedestal to the conversion area at the front of the pedestal by the water bag trolley, and then the hydraulic trolley is used to move the caisson to the upper part of the floating dock deck, thereby realizing efficient and safe docking of the caisson.

[0019] 2. The present invention realizes the rapid and accurate installation of the steel cushion beam, ensures the stability of the steel cushion beam, and is easy to install and dismantle. At the same time, it solves the problem of height difference and track mismatch between the floating dock and the prefabrication yard shipping channel, improves the adaptability of the prefabrication yard and the floating dock, realizes the rapid and smooth conversion of the caisson shipping process, and improves the efficiency of caisson docking.

[0020] 3. Compared with conventional processes, the present invention can utilize the existing prefabrication site environment and the performance conditions of ship machinery and equipment, reduce the prefabrication site renovation construction, and solve the problem of caisson docking due to changes in floating docks and the inability to achieve conventional processes. The construction safety is high, the probability of safety accidents is reduced, and safe operation requirements are guaranteed. The construction time is short and the caisson shipment period is effectively shortened.

[0021] Therefore, the present invention combines the water bag trolley docking process with the hydraulic trolley docking process to achieve the construction goal of large caisson docking, which can avoid the extension of construction period due to the mismatch between the floating dock and the prefabrication site design and transportation process, reduce the amount of prefabrication site renovation work, and achieve positive effects of high efficiency, safety, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings partially disclose specific embodiments of the present invention, wherein: Figure 1 It is a structural schematic diagram of the steel cushion beam of the present invention; Figure 2 is a structural cross-sectional view of the steel cushion beam of the present invention; Figure 3 It is a structural cross-sectional view of the steel cushion beam of the present invention fixed on the steel rail of the water bag trolley; Figure 4 It is a usage state diagram of the present invention; Reference numerals: 1. Lower support steel; 11. Limiting plate; 2. Upper supporting steel; 21. Lifting lug; 3. Upper rib plate; 31. Connecting channel steel; 32. Connecting inclined channel steel; 33. Upper rib plate reinforcement plate; 4. Lower rib plate; 41. Lower rib plate reinforcement plate; 5. Docking track; 51. Track pressure plate; 6. Water bag trolley rails; 61. Water bag trolley; 7. End plate; 71. Connecting bolts; 8. Hydraulic trolley; 81. Floating dock hydraulic trolley rail; 82. Floating dock; 9. Caisson. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and embodiments. Embodiment 1:

[0024] like Figure 1-3 As shown, the steel cushion beam for the caisson water bag-hydraulic trolley conversion docking provided by the present invention includes a lower supporting steel 1 and an upper supporting steel 2, the lower supporting steel 1 and the upper supporting steel 2 are welded up and down to form an integral supporting steel, and the integral supporting steel is symmetrically arranged on both sides; the upper end of the upper supporting steel 2 is provided with an upper docking track 5 that is compatible with the bottom track wheel of the hydraulic trolley, and the upper docking track 5 is fastened to the upper part of the upper supporting steel 2 through a track pressing plate 51; the bottom of the lower supporting steel 1 is placed on the upper part of the water bag trolley rail 6, and is fixed between the two water bag trolley rails 6 through a limiting plate 11; the total height of the upper docking track 5, the lower supporting steel 1, the upper supporting steel 2 and the hydraulic trolley is consistent with the height of the water bag trolley.

[0025] A connecting channel steel 31 is arranged between the integral supporting steel sections symmetrically arranged on both sides, and a connecting inclined channel steel 32 is arranged between two adjacent connecting channel steels 31. The connecting channel steel 31, the connecting inclined channel steel 32 and the integral supporting steel section form a triangular supporting structure, which can improve the supporting force and fixing force of the integral supporting steel section, so that the caisson can be docked efficiently and safely.

[0026] The upper and lower wing plates of the lower support steel 1 and the upper and lower wing plates of the upper support steel 2 are supported and reinforced by upper ribs 3 and lower ribs 4; the upper ribs 3 are provided with upper rib reinforcement plates 33; the lower ribs 4 are provided with lower rib reinforcement plates 41; and the upper support steel 2 is provided with lifting lugs 21. The lifting lugs 21 facilitate the lifting of the lower support steel 1 and the upper support steel 2 to the trench of the prefabrication site and place them on the upper part of the original water bag trolley rails 6, and the position of the steel cushion beam is fixed between the limit plate and the two original water bag trolley rails 6. The upper rib reinforcement plate 33 can improve the supporting force of the upper rib 3 and enhance stability. The lower rib reinforcement plate 41 can improve the supporting force of the lower rib 4 and enhance stability.

[0027] Both ends of the lower support steel 1 and the upper support steel 2 are provided with end plates 7, and the two adjacent sections of steel cushion beams are connected to form a whole by connecting bolts 71. The end plates 7 connect multiple sections of lower support steel 1 and upper support steel 2 together, so that the caisson can be docked efficiently and safely. Embodiment 2:

[0028] like Figure 4 As shown, the caisson water bag-hydraulic trolley conversion docking construction process provided by the present invention specifically includes the following steps: Step 1: When the caisson 9 is being transported to the dock, the water bag trolley 61 moves the caisson 9 from the rear of the pedestal to the trolley conversion area at the front of the pedestal. After the caisson 9 is placed on the top of the cushion pier, the water bag trolley 61 is withdrawn; Step 2: Install the steel cushion beam for the conversion of the caisson water bag to the hydraulic trolley to the ditch below the caisson 9, and simultaneously assemble the hydraulic trolley 8 on the deck of the floating dock 82. Use a steel wire rope to connect the hydraulic trolley 8 and the steel cushion beam, and use the hydraulic trolley 8 to pull the steel cushion beam to the bottom of the caisson and align it with the floating dock hydraulic trolley rail 81; Step 3, the hydraulic trolley 8 can automatically drive from the deck of the floating dock 82 into the upper part of the steel cushion beam below the caisson 9. After the hydraulic trolley 8 is in place, it lifts and moves the caisson 9 to the upper part of the floating dock to complete the docking of the caisson.

[0029] The present invention combines the water bag trolley docking process with the hydraulic trolley docking process to achieve the large caisson docking construction goal, which can avoid the extension of the construction period due to the mismatch between the floating dock 82 and the prefabrication site design and transportation process, and can reduce the prefabrication site renovation project volume to achieve high efficiency, safety and low cost. Embodiment 3:

[0030] like Figure 4 As shown, the caisson water bag-hydraulic trolley conversion docking construction process provided by the present invention specifically includes the following steps: Step 1, when the caisson 9 is being transported and docked, the water bag trolley 61 transports the caisson 9 from the rear of the pedestal to the trolley conversion area at the front of the pedestal, and after the caisson 9 is placed on the top of the cushion pier, the water bag trolley 61 is withdrawn; the floating dock 82 is seated at the prefabrication yard's shipping port. Before seating, the center line of the deck of the floating dock 82 should be aligned with the center line of the pedestal to prevent deviation; some caissons 9 are located behind the pedestal in the prefabrication yard, far away from the trolley conversion area at the front of the pedestal; when the caisson 9 is transported and installed, the water bag trolley is used to lift the caisson 9 from the rear area to the trolley conversion area at the front of the pedestal; after the caisson 9 arrives at the front area of ​​the pedestal, 2 cm high pads are placed under the caisson in advance, the water bag trolley 61 releases water to seat the caisson on the top of the pads, and the water bag trolley 61 is withdrawn with the trench cover.

[0031] Step 2, install the steel cushion beam for the conversion of caisson water bag-hydraulic trolley to the ditch below the caisson 9, and assemble the hydraulic trolley 8 on the deck of the floating dock at the same time, use steel wire rope to connect the hydraulic trolley 8 and the steel cushion beam, and use the hydraulic trolley 8 to pull the steel cushion beam to the bottom of the caisson and align it with the floating dock hydraulic trolley rail 81; assemble the steel cushion beam for the conversion of caisson water bag-hydraulic trolley to the dock in the steel cushion beam assembly area behind the caisson, and pay attention to keeping the connection of each section horizontal when assembling the steel cushion beam; assemble the hydraulic trolley 8 on the floating dock hydraulic trolley rail. After the steel cushion beam for the conversion of caisson water bag-hydraulic trolley to the dock is assembled, use steel wire rope to connect it to the hydraulic trolley assembled on the upper part of the floating dock, and use the hydraulic trolley 8 to pull the steel cushion beam to the bottom of the caisson 9; after the steel cushion beam is pulled to the bottom of the caisson 9 and in place, weld and reinforce its front and rear ends to prevent displacement when the caisson is docked.

[0032] Step 3, after the assembly on the upper part of the floating dock deck is completed, the hydraulic trolley 8 can drive into the upper part of the steel pad beam under the caisson by itself, and the hydraulic trolley 8 drives to the bottom of the caisson to lift the caisson up, and the driving trolley moves the caisson to the upper part of the floating dock deck, so that the caisson 9 sits on the upper part of the pad pier provided by the floating dock, and the caisson is docked.

[0033] The present invention combines the water bag trolley docking process with the hydraulic trolley docking process to achieve the construction goal of large caisson docking, which can avoid the extension of the construction period due to the mismatch between the floating dock and the design and transportation process of the prefabrication site, reduce the amount of prefabrication site reconstruction work, and achieve high efficiency, safety, and low cost.

[0034] The present invention provides a 3000T to 10000T large-scale caisson water bag-hydraulic trolley conversion docking construction process. In view of the current commonly used caisson docking process, when facing the situation that the floating dock and the prefabrication yard are not matched, the prefabrication yard pedestal and the shipping port need to be subjected to large-scale renovation and construction to meet the docking demand, and the renovation and construction cost is high, and the construction period is delayed. Therefore, the water bag-hydraulic trolley conversion docking construction process is innovatively adopted.

[0035] The present invention has been successfully applied in the second phase project of crude oil terminal in the West Port Area of ​​Yantai Port (300,000-ton terminal in the first phase) and other projects. When faced with the situation that the floating dock and the prefabrication yard do not match, it can reduce the amount of prefabrication yard reconstruction work, better adapt to the site status, reduce project costs, shorten construction period, has strong practicality, and has good economic and social benefits.

Claims

1. A steel cushion beam for converting a caisson water bag to a hydraulic trolley for docking, comprising a lower support steel (1) and an upper support steel (2), wherein: The lower support steel (1) and the upper support steel (2) are welded up and down to form an integral support steel, and the integral support steel is symmetrically arranged on both sides; the upper end of the upper support steel (2) is provided with an upper docking track (5) adapted to the track wheel at the bottom of the hydraulic trolley, and the upper docking track (5) is fastened to the upper part of the upper support steel (2) through a track pressure plate (51); the bottom of the lower support steel (1) is placed on the upper part of the water bag trolley rail (6), and is fixed between the two water bag trolley rails (6) through a limit plate (11); the total height of the upper docking track (5), the lower support steel (1), the upper support steel (2) and the hydraulic trolley is consistent with the height of the water bag trolley.

2. The steel cushion beam for converting the caisson water bag to the hydraulic trolley for docking according to claim 1 is characterized in that: A connecting channel steel (31) is arranged between the integral supporting steel sections symmetrically arranged on both sides, and a connecting inclined channel steel (32) is arranged between two adjacent connecting channel steels (31). The connecting channel steel (31), the connecting inclined channel steel (32) and the integral supporting steel section form a triangular supporting structure.

3. The steel cushion beam for converting the caisson water bag to the hydraulic trolley into dock according to claim 1 is characterized in that: Upper ribs (3) and lower ribs (4) are used to support and reinforce the upper and lower wing plates of the lower support steel (1) and the upper and lower wing plates of the upper support steel (2); an upper rib reinforcement plate (33) is provided on the upper rib (3); a lower rib reinforcement plate (41) is provided on the lower rib (4); and a lifting lug (21) is provided on the upper support steel (2).

4. The steel cushion beam for converting the caisson water bag to the hydraulic trolley for docking according to claim 1 is characterized in that: Both ends of the lower support steel (1) and the upper support steel (2) are provided with end plates (7), and two adjacent sections of steel cushion beams are connected into a whole by connecting bolts (71) to form the end plates (7).

5. The construction process of converting the caisson water bag to the hydraulic trolley into docking is characterized by: The specific steps include: Step 1, when the caisson (9) is being transported to the dock, the water bag trolley (61) moves the caisson (9) from the rear of the pedestal to the trolley conversion area at the front of the pedestal, and after the caisson (9) is placed on the top of the cushion pier, the water bag trolley (61) is withdrawn; Step 2, install the steel cushion beam used for the conversion of the caisson water bag to the hydraulic trolley into the trench below the caisson (9), and simultaneously assemble the hydraulic trolley (8) on the deck of the floating dock (82), use a steel wire rope to connect the hydraulic trolley (8) and the steel cushion beam, and use the hydraulic trolley (8) to pull the steel cushion beam to the bottom of the caisson and align it with the floating dock hydraulic trolley rail (81); Step 3, the hydraulic trolley (8) can be driven from the floating dock deck to the upper part of the steel cushion beam below the caisson (9) by itself. After the hydraulic trolley (8) is in place, it lifts and moves the caisson (9) to the upper part of the floating dock, completing the docking of the caisson.

6. The steel cushion beam for converting the caisson water bag to the hydraulic trolley for docking according to claim 5 is characterized in that: In step 1, the floating dock (82) is seated at the outlet of the prefabrication yard. Before the seat is seated, the center line of the floating dock deck should be aligned with the center line of the pedestal to prevent deviation.

7. The steel cushion beam for converting the caisson water bag to the hydraulic trolley for docking according to claim 5 is characterized in that: In the step 1, part of the caisson (9) is located behind the pedestal in the prefabrication yard, and is far away from the trolley conversion area at the front of the pedestal; when the caisson (9) is shipped for installation, a water bag trolley is used to lift the caisson (9) from the rear area to the trolley conversion area at the front of the pedestal; after the caisson (9) reaches the front area of ​​the pedestal, 2 cm high pads are placed under the caisson in advance, the water bag trolley (61) is released to place the caisson on the top of the pads, and the water bag trolley (61) is withdrawn with the trench cover.

8. The steel cushion beam for converting the caisson water bag to the hydraulic trolley into dock according to claim 5 is characterized in that: In step 2, the steel cushion beams used for the conversion of the caisson water bag to the hydraulic trolley for docking are assembled in the steel cushion beam assembly area behind the caisson. When assembling the steel cushion beams, attention should be paid to keeping the connections of each section horizontal; the hydraulic trolley (8) is assembled on the floating dock hydraulic trolley rails.

9. The steel cushion beam for converting the caisson water bag to the hydraulic trolley for docking according to claim 5 is characterized in that: In step 2, after the steel cushion beam for the caisson water bag-hydraulic trolley conversion is assembled, it is connected to the hydraulic trolley assembled on the upper part of the floating dock using a steel wire rope, and the steel cushion beam is towed to the bottom of the caisson (9) using the hydraulic trolley (8); after the steel cushion beam is towed to the bottom of the caisson (9) and in place, its front and rear ends are welded and reinforced to prevent displacement when the caisson is docked.

10. The steel cushion beam for converting the caisson water bag to the hydraulic trolley for docking according to claim 5 is characterized in that: In step 3, after the upper part of the floating dock deck is assembled, the hydraulic trolley (8) can be driven into the upper part of the steel cushion beam below the caisson by itself, the hydraulic trolley (8) drives to the bottom of the caisson to lift up the caisson, and the driving trolley moves the caisson to the upper part of the floating dock deck, so that the caisson (9) sits on the upper part of the cushion pier provided by the floating dock, and the caisson is docked.

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