A method for hoisting an ultra-high superstructure section of an ultra-large container ship

Abstract

The application discloses a hoisting method for an ultra-high superstructure unit section of an ultra-large container ship, and is mainly used for hoisting the complete superstructure unit section of the ultra-large container ship. The method solves the problems of the interference and the ultra-highness of the superstructure after the structure of the superstructure is completed, and ensures the safety of hoisting the superstructure under the premise of the complete structure by means of reasonable hoisting methods and strengthened design under the condition that the lifting capacity and lifting height of the gantry crane are limited. The hoisting scheme comprises a lifting ring on a cab deck, structure strengthening, temporary strengthening and a steel wire rope of the gantry crane. The application can solve the problem of the structural integrity of the superstructure, shorten the dock period, reduce the high-altitude operation, and ensure the safety of hoisting the ultra-high superstructure.

Description

Technical Field

[0001] The present invention relates to shipbuilding, and in particular to a method for hoisting a super-high superstructure section on an ultra-large container ship. Background Art

[0002] With the trend toward larger ships, the capacity and lifting height of crane equipment in older shipyards are no longer sufficient to meet the requirements of shipbuilding and hoisting. For ultra-large container ships, the superstructure sections maintain the structural integrity of the corridors on both sides of the bridge, compared to other container ship superstructures. This structure reduces the workload of subsequently lifting the two sections separately, reduces overhead work, and enhances the integrity of both the structure and outfitting. However, to maintain this dual integrity, the lifting height approaches the maximum lifting height limit of the gantry crane. Conventional practices would inevitably lead to structural damage and insufficient lifting height margin.

[0003] Chinese invention patent 201110416188.4 discloses a method for hoisting a ship's superstructure as a whole. This method employs integrated, continuous four-eye lifting lugs installed at the front and rear ends of the walls on both sides of the superstructure's segmented bridge wing deck. Standard lifting lugs are also installed on the left, right, and front sides of the superstructure's chimney. Each lug is connected to a trolley via a wire rope for integral hoisting. This method, as a method for hoisting a ship's superstructure as a whole, is particularly effective in shortening slipway and dock outfitting cycles, thereby shortening the overall shipbuilding cycle. However, this process is unsuitable for ultra-large container ships, and is particularly unsuitable for ultra-high-rise superstructures. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art. The present invention provides a method for lifting the ultra-high superstructure section on an ultra-large container ship. The method is based on the characteristics of the integrity and ultra-high structure of the superstructure, solves the lifting risks of the superstructure section, and improves the safety of the lifting.

[0005] In order to achieve the above-mentioned invention purpose, the technical solution provided by the present invention is as follows:

[0006] A method for hoisting an ultra-high superstructure section on an ultra-large container ship, wherein the ultra-high superstructure section has a height of 15 meters, the uppermost layer is a compass deck, below the compass deck is a cab deck, the left and right sides of the cab are cab galleries, and the two layers below the cab are H deck and G deck respectively. The method is characterized in that it comprises the following steps:

[0007] The first step is to determine the overall lifting plan for the super-high superstructure section, design the lifting ring location and reinforcement plan, and determine the structural reinforcement and lifting ring installation during the segmented construction phase;

[0008] The second step is to locally strengthen the segmented structure. The lifting rings will be installed on the cab deck segment, and the lifting ring installation area will be delineated. This area of ​​the cab deck segment will be reinforced, and the plate seams in the lifting ring installation area will be optimized. Thick plates will be selected to construct the lifting ring installation area, and the deck bracket will also be constructed of thick plates. The thickness of the thick plates is twice that of the steel plates in other parts of the cab deck segment.

[0009] The third step is to install the lifting ring. The cab deck section is designed to be symmetrical on the port and starboard sides. There are four lifting ring installation areas in the symmetrical design, namely the port bow area, the starboard bow area, the port stern area and the starboard stern area. The lifting ring is installed in the lifting ring installation area;

[0010] The fourth step is to install temporary reinforcement. During the construction of the cab deck in sections, double-tied channel steel is installed at the lifting rings of the cab deck to strengthen the structural lifting strength. Reinforcement ribs are added to the top of the lifting rings. After the final assembly into the super-high superstructure section, jacketing plates are added to the cab wall as temporary reinforcement in preparation for overall lifting.

[0011] Step 5: Connect the gantry crane and wire ropes. Connect the No. 1 hook of the gantry crane to the lifting ring on the starboard bow area through a lifting bar. Connect the No. 2 hook of the gantry crane to the lifting ring on the right stern area through a lifting bar. Connect the No. 3 hook of the gantry crane's lower trolley to two lifting rings on the port side of the cab deck. Fold the two sections of wire rope in half and connect them together using a shackle. After connection, connect the two ends of the wire rope to the lifting rings on the gantry crane and the super-high superstructure section respectively.

[0012] The sixth step is to start the gantry crane for lifting and lift the super-high superstructure section to the installation position of the hull. After the lifting is completed, the lifting rings and temporary reinforcements are removed, and the removed parts are polished and repainted.

[0013] In the method for hoisting an ultra-high superstructure section on an ultra-large container ship of the present invention, when the ultra-high superstructure section is loaded and hoisted, the height from the bottom to the dock bottom is 60.3 meters, the distance from the top to the dock bottom is 75.3 meters, and the lifting margin is 1 meter.

[0014] In the second step, the thickness of the thick plate in the lifting ring installation area is 16 mm, and the thickness of the plate outside the lifting ring installation area is 8 mm.

[0015] In the third step, four lifting rings are installed in each lifting ring installation area, and a total of 16 lifting rings are installed on the cab deck section.

[0016] In the fourth step above, a double-tied channel steel is welded on the inner side of each lifting ring, and the four adjacent double-tied channel steels are connected in series using another double-tied channel steel. A reinforcing rib is fixed on the back of the steel plate at the fixed position of the lifting ring.

[0017] Furthermore, in the fourth step, the cab deck to the G deck are hollowed out as a whole, and two jacketing plates need to be added between the cab deck and the G deck for overall reinforcement.

[0018] In the fifth step, the four lifting rings on the starboard side near the bow area are connected to the No. 1 hook of the gantry crane through a 300T lifting row, the four lifting rings on the starboard side near the stern area are connected to the No. 2 hook of the gantry crane through a 300T lifting row, and the eight lifting rings on the port side cabin deck including the port side near the bow area and the port side near the stern area are connected to the No. 3 hook of the trolley under the gantry crane.

[0019] Furthermore, in the fifth step mentioned above, the superstructure section of the ultra-large container ship is in an ultra-high state during lifting. Considering the integrity of the compass deck and the integrity of the cab, it is necessary to avoid the wire rope from touching the cab corridor.

[0020] Furthermore, in the fifth step, the superstructure section of the ultra-large container ship is hoisted by using an 8-meter steel wire rope folded in half and a 15-meter steel wire rope folded in half, and these two steel wire ropes are connected by an 85-ton shackle, and then connected to the lifting ring by a 55-ton shackle.

[0021] Based on the above technical solution, the patent of this invention has achieved the following technical effects compared with the existing technology:

[0022] 1. The hoisting method of the present invention ensures the overall integrity of the super-high superstructure section, realizes the hoisting of the super-high superstructure section with complete structure of ultra-large container ship, and improves the dual integrity of the superstructure section structure and outfitting.

[0023] 2. The hoisting method of the present invention ensures the safety of ultra-high hoisting, avoids the scattered hoisting work of the uppermost cab deck corridor, avoids most of the high-altitude operations, and shortens the docking period. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a complete ultra-high superstructure section of an ultra-large container ship according to the present invention.

[0025] Figure 2 This is a diagram of the reinforcement of the wheelhouse deck structure in a method for hoisting a super-high superstructure section on an ultra-large container ship according to the present invention.

[0026] Figure 3 The present invention is a diagram of the arrangement of lifting rings in a method for lifting a super-high superstructure section on a super-large container ship.

[0027] Figure 4 This is a typical cross-sectional view of a method for hoisting a super-high superstructure section on a super-large container ship according to the present invention.

[0028] Figure 5 The present invention provides an overview of temporary reinforcement in a method for hoisting a super-high superstructure section on a super-large container ship.

[0029] Figure 6 The invention relates to a simulated configuration of a lower trolley wire rope in a method for hoisting a super-high superstructure section on a super-large container ship.

[0030] Figure 7 The present invention is a schematic diagram showing a method for hoisting a super-high superstructure section on a super-large container ship after the hoisting is completed. DETAILED DESCRIPTION

[0031] The method for hoisting a superstructure segment of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this should not be used to limit the scope of protection of the present invention.

[0032] like Figure 1 As shown in the figure, on an ultra-large container ship, the superstructure section itself is 15 meters high. The topmost level is the compass deck, below which is the wheelhouse deck. The wheelhouse galleries are located to the left and right of the wheelhouse, and the two levels below the wheelhouse are H-deck and G-deck. Compared to the superstructures of other container ships, the superstructure section of an ultra-large container ship maintains the structural integrity of the galleries on both sides of the wheelhouse. This results in a lifting height approaching the maximum lifting height of a gantry crane. Conventional practices would inevitably lead to structural damage and insufficient lifting height margin.

[0033] like Figures 2 to 6 As shown, the method for hoisting a super-high superstructure segment in this embodiment includes the following steps:

[0034] First, the segmented structure needs to be partially reinforced. Since the cab deck 1 itself is weak, placing lifting rings on it can easily cause structural damage. The thickness is only 8mm, and there is no connection in the middle of the structure, which makes the structure too soft. Therefore, the lifting rings are designed to be installed on the cab deck 1. At the beginning of the design, after the lifting plan is confirmed, it is necessary to consider strengthening the structure in the lifting ring installation area. The relevant deck plate seams also need to be optimized accordingly. The plate thickness and the deck anti-top bracket 3 need to be strengthened. The optimization plan is as follows: Figure 2 As shown, the thickness of the plate in the area where the lifting ring is installed is increased to 16mm, and the deck is increased with plate gaps. The purpose of increasing the plate gaps is to prevent the plate thickness in other areas where the lifting ring is installed from increasing. In addition, there is a bracket 3 on the reverse side of the deck where the lifting ring is installed, which also needs to be increased to 16mm. For details on the side view of the reverse bracket, see Figure 4 3 in ;

[0035] Secondly, the lifting ring is installed. Since the compass deck structure is too weak, the lifting ring 2 is designed to be installed on the cab deck. Before this, the first step must be to locally strengthen the segmented driving deck. Figure 3 As shown, a total of 16 lifting rings are installed, of which 4 lifting rings on the starboard side near the bow are connected to the gantry crane's 1# hook through a 300T lifting row, 4 lifting rings on the starboard side near the stern are connected to the gantry crane's 2# hook and a 300T lifting row, and 8 lifting rings on the port side of the wheelhouse deck are connected to the 3# hook of the gantry crane's lower trolley.

[0036] Thirdly, install temporary reinforcement. This part is temporary reinforcement for hoisting and needs to be removed after the subsequent hoisting is completed. Double-tied channel steel 5 is installed near the lifting ring on the driving deck to further strengthen the structural hoisting strength. Reinforcement ribs 6 are also added to the lifting ring to strengthen the reverse side of the lifting ring. Secondly, a sleeve plate 7 is added to the cab wall to increase its overall hoisting strength and reduce hoisting deformation. The side view of the channel steel reinforcement on the deck can be seen in detail. Figure 4 In 5, each lifting ring needs to be double-tied channel steel with a length of about 1600mm on the inner side. In addition, these four double-tied channel steels need to be connected in series with another double-tied channel steel. For the area on the back of the deck without structural brackets, reinforcement ribs 6 need to be used to strengthen the area where the lifting ring is installed. Since the lifting ring is installed at the stern of the cab deck, the cab deck to the G deck is completely hollowed out. The overall strength is insufficient for lifting. It is necessary to add two sets of material plates to strengthen this area as a whole, such as Figure 5 As shown in 7.

[0037] Next, the gantry crane's lower trolley 3# hook and wire rope arrangement must be removed. Since the superstructure section of this ultra-large container ship is in an ultra-high state, and considering the integrity of the compass deck 4 and the cab, it is necessary to prevent the wire rope from hitting the cab corridor 8. In addition, considering that the lifting ring used for lifting has an 18° angle limit with the wire rope, if the wire rope is too short, the angle between the shackle on it and the lifting ring will be too large, which will cause a safety risk in lifting. Therefore, considering the above factors, the gantry crane's lower trolley hook needs to be removed, and the gantry crane's own claw hook 9 should be used. In addition, the wire rope used for lifting also needs to be strictly configured. Therefore, the superstructure lifting uses an 8-meter wire rope folded in half 10 and a 15-meter wire rope folded in half 12, and the two wire ropes are connected by an 85-ton shackle 11, and then connected to the lifting ring 2 by a 55-ton shackle 13. Figure 6 shown.

[0038] Finally, the gantry crane is installed. After the above work is completed, the gantry crane is started. After the total section is installed, the lifting rings and temporary reinforcements are removed, and the structure is polished and smoothed without damaging the structural base material, and paint is added.

[0039] After the hoisting is completed, the super-high superstructure section will be hoisted onto the hull of the ultra-large container ship as a whole, completing the entire operation process. Figure 7 The structural form shown.

Claims

1. A method for hoisting an ultra-high superstructure section on an ultra-large container ship, wherein the ultra-high superstructure section has a height of 15 meters, the uppermost layer being the compass deck, the lower layer being the cab deck, the left and right sides of the cab being the cab galleries, and the two layers below the cab being the H deck and the G deck, respectively. The method comprises the following steps: The first step is to determine the overall lifting plan for the super-high superstructure section, design the lifting ring location and reinforcement plan, and determine the structural reinforcement and lifting ring installation during the segmented construction phase; The second step is to locally strengthen the segmented structure. The lifting rings will be installed on the cab deck segment, and the lifting ring installation area will be delineated. This area of ​​the cab deck segment will be reinforced, and the plate seams in the lifting ring installation area will be optimized. Thick plates will be selected to construct the lifting ring installation area, and the deck bracket will also be constructed of thick plates. The thickness of the thick plates is twice that of the steel plates in other parts of the cab deck segment. The third step is to install the lifting ring. The cab deck section is designed to be symmetrical on the port and starboard sides. There are four lifting ring installation areas in the symmetrical design, namely the port bow area, the starboard bow area, the port stern area and the starboard stern area. The lifting ring is installed in the lifting ring installation area; The fourth step is to install temporary reinforcement. During the construction of the cab deck in sections, double-tied channel steel is installed at the lifting rings of the cab deck to strengthen the structural lifting strength. Reinforcement ribs are added to the top of the lifting rings. After the final assembly into the super-high superstructure section, jacketing plates are added to the cab wall as temporary reinforcement in preparation for overall lifting. Step 5: Connect the gantry crane and wire ropes. Connect the No. 1 hook of the gantry crane to the lifting ring on the starboard bow area via a lifting bar. Connect the No. 2 hook of the gantry crane to the lifting ring on the starboard stern area via a lifting bar. Connect the No. 3 hook of the gantry crane's lower trolley to two lifting rings on the port side of the wheelhouse deck. Fold the two sections of wire rope in half and connect them together using a shackle. After connection, connect the two ends of the wire rope to the lifting rings on the gantry crane and the super-high superstructure section respectively. The sixth step is to start the gantry crane for lifting and lift the super-high superstructure section to the installation position of the hull. After the lifting is completed, the lifting rings and temporary reinforcements are removed, and the removed parts are polished and repainted.

2. The method for hoisting a super-high superstructure section on an ultra-large container ship according to claim 1, characterized in that: When the super-high superstructure section is loaded and hoisted, the height of the bottom from the dock bottom is 60.3 meters, the top is 75.3 meters from the dock bottom, and the lifting margin is 1 meter.

3. A method for hoisting a super-high superstructure section on an ultra-large container ship according to claim 1, wherein in the second step, the thickness of the thick plate in the lifting ring installation area is 16 mm, and the thickness of the plate outside the lifting ring installation area is 8 mm.

4. A method for hoisting an ultra-high superstructure section on an ultra-large container ship according to claim 1, wherein in the third step, four lifting rings are installed in each lifting ring installation area, and a total of 16 lifting rings are installed on the cab deck section.

5. A method for hoisting a super-high superstructure section on a super-large container ship according to claim 1, wherein in the fourth step, a double-tied channel steel is welded on the inner side of each lifting ring, and four adjacent double-tied channel steels are connected in series using another double-tied channel steel, and a reinforcing rib is fixed on the back of the steel plate at the fixed position of the lifting ring.

6. The method for hoisting an ultra-high superstructure section on an ultra-large container ship according to claim 1, wherein in the fourth step, the bridge deck to the G-deck are integrally hollowed out, and two nesting plates are required to be added between the bridge deck and the G-deck for overall reinforcement.

7. A method for hoisting a super-high superstructure section on an ultra-large container ship according to claim 1, wherein in the fifth step, the four lifting rings on the starboard bow area are connected to the No. 1 hook of the gantry crane through a 300T lifting row, the four lifting rings on the starboard stern area are connected to the No. 2 hook of the gantry crane through a 300T lifting row, and the eight lifting rings on the port cab deck including the port bow area and the port stern area are connected to the No. 3 hook of the trolley under the gantry crane.

8. The method for hoisting an ultra-high superstructure section on an ultra-large container ship according to claim 1, wherein in the fifth step, the superstructure section of the ultra-large container ship is in an ultra-high state during hoisting. Considering the integrity of the compass deck and the integrity of the cab, it is necessary to prevent the wire rope from hitting the cab gallery.

9. The method for hoisting an ultra-high superstructure section on an ultra-large container ship according to claim 1, wherein in the fifth step, the superstructure section of the ultra-large container ship is hoisted by using an 8-meter steel wire rope folded in half and a 15-meter steel wire rope folded in half, and the two steel wire ropes are connected by an 85-ton shackle, and then connected to the lifting ring by a 55-ton shackle.

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