A large-scale berthing pontoon of a steel box unit combined structure

Abstract

The application discloses a steel box unit combined structure of a large-scale berthing buoy, which comprises a bottom plate and a top plate, outer webs are arranged on the two sides of the bottom plate, the outer webs are fixedly welded with the top plate and the bottom plate in correspondence, two middle webs are arranged between the outer webs and are fixedly welded with the top plate and the bottom plate in correspondence, and hollow partition plates are fixedly welded between the middle webs and the outer webs. Angle steels are fixedly welded and arranged at intervals on the outer periphery of the hollow partition plates, and the angle steels transmit the force borne by each part of the box to the hollow partition plates for dispersion.

Description

Technical Field

[0001] This invention relates to a steel box unit assembly structure for a large berthing pontoon, belonging to the field of offshore floating platform technology. Background Technology

[0002] Mooring pontoons form floating platforms at sea, which can be used for maritime cargo transportation, offshore operations, and other purposes. For larger mooring pontoons, multiple prefabricated pontoon units need to be assembled together, see Chinese Patent Publication No. CN208802126U.

[0003] The cross-section of the steel box unit is a three-hole structure, which requires stable support in the middle of the steel box unit. The existing support in the middle of the steel box unit is disclosed in Chinese Patent Publication No. CN202295235U, which uses vertical longitudinal bulkhead columns to strengthen the support in the middle of the box. However, when subjected to local stress, the box cannot bear the stress evenly in different parts. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a steel box unit combination structure for a large berthing pontoon.

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

[0006] This invention provides a steel box unit assembly structure for a large berthing pontoon, comprising:

[0007] A steel box unit that transmits force in a distributed manner through multiple angle steels.

[0008] The steel box unit includes:

[0009] The base plate and the top plate have outer webs on both sides of the base plate, which are welded and fixed to the top plate and the base plate respectively.

[0010] There are two spaced-apart intermediate webs between the outer webs, and the intermediate webs are welded and fixed to the top and bottom plates respectively.

[0011] Hollow partitions are welded and fixed between the middle web plates and between the middle web plates and the outer web plates.

[0012] Angle steel is welded and fixedly installed at intervals on the outer periphery of the hollow partition. The angle steel transmits the forces borne by various parts of the box to the hollow partition for dispersion.

[0013] A round tube is welded and fixedly installed inside the hollow partition. A column is welded and fixedly installed in the middle of the hollow partition. T-shaped longitudinal ribs are welded and fixedly installed above and below the column.

[0014] A lifting lug plate is fixed to the middle web plate, and the lifting lug plate has a lifting hole; the top plate above the lifting lug plate has a cable passage hole for the cable to enter.

[0015] The top plate near the cable hole is provided with a manhole, and the top plate at the manhole is equipped with an openable cover plate. The middle web plate below the manhole is provided with a ladder.

[0016] A bracket is fixedly installed on the outside of the outer web plate, and a rubber body is fixedly connected to the bracket. The rubber body and the bracket form a fender structure on the outer web plate of the mooring pontoon that provides elastic cushioning.

[0017] The bracket consists of vertical plates, longitudinal plates, and mounting panels. Multiple vertical plates and multiple longitudinal plates are welded and fixed perpendicularly and intersectingly. Multiple vertical plates and multiple longitudinal plates are fixedly contacted with the outer web plate at multiple points. The mounting panels are welded and fixed to the vertical plates and longitudinal plates, and the rubber body is fixed to the mounting panels.

[0018] The beneficial effects of this invention are as follows: the steel box unit transmits and disperses the force it bears through the hollow partition and the angle steel distributed at intervals around the outer perimeter of the hollow partition, thus solving the problem that the box cannot bear the force evenly when it is subjected to local stress. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the berthing pontoon of the present invention;

[0020] Figure 2 This is a top view schematic diagram of the misaligned splicing joints of the top plate and outer web plate of the present invention;

[0021] Figure 3 This is a bottom view of the misaligned splicing joints of the outer web and bottom plate of the present invention.

[0022] Figure 4 This is a schematic diagram of the longitudinal distribution of the steel box unit of the present invention;

[0023] Figure 5 This is a structural schematic diagram of the top plate of the present invention in the lower state;

[0024] Figure 6 This is a structural schematic diagram of the present invention when the buoy is docked, showing the solid-body bulkhead;

[0025] Figure 7 This is a schematic diagram of the distribution of the solid-core partition and waist plate of the present invention;

[0026] Figure 8 This is a schematic diagram of the distribution of the solid-belly partition, hollow-belly partition, and waist plate of the present invention;

[0027] Figure 9 This is a schematic diagram of the distribution of the lifting lugs and the middle web of the present invention; Detailed Implementation

[0028] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0029] Reference manual attached Figures 1 to 9 As shown.

[0030] The existing technology for prefabricated box units, as seen in Chinese Patent Publication No. CN217460217U, allows for welding between the bottom plate and top plate, and between the web plate and the bottom plate and top plate, within the channel. However, welding the connection between the bottom of the top plate and the web plate and the top of the side sealing plate within the channel requires looking upwards, which results in high labor intensity.

[0031] The present application discloses a manufacturing process for a berthing pontoon, comprising two main steps: prefabrication of steel box units and assembly of the berthing pontoon.

[0032] The prefabrication steps for the steel box unit are as follows.

[0033] One steel box unit corresponds to two top plates 1, one bottom plate 2, two middle web plates 3, two outer web plates 4, and three hollow partitions 5.

[0034] The two top plates 1 are first laid down in the bottom position and then welded together. This can be understood as... Figure 4 Rotate from the top plate 1 position to Figure 5 With the top plate 1 at the bottom, the T-shaped longitudinal ribs 6 and angle steel 11 are welded and fixed to the top plate 1.

[0035] The hollow partition 5 in the middle is welded and fixed to the middle of the top plate 1. Angle steel 11 and longitudinal middle web plate 3 are welded and fixed on both sides of the hollow partition 5 in the middle. Column 7 and round pipe 8 are welded and fixed on the hollow partition 5 in the middle.

[0036] Weld and fix the hollow partition plates 5 on both sides of the top plate 1. Weld and fix angle steel 11 and round pipe 8 to the hollow partition plates 5 on both sides. Weld and fix the outer web plates 4 on both sides of the top plate 1. Weld and fix the outer web plates 4 to the hollow partition plates 5 on both sides. Weld and fix the angle steel 11 and T-shaped longitudinal ribs 6 on the top of the three hollow partition plates 5. At this time, the top plate 1 is fully welded from top view to the middle web plate 3, outer web plate 4, hollow partition plates 5, and top plate 1.

[0037] The base plate 2 is placed on top of the three hollow partition plates 5 and temporarily fixed by spot welding to form a steel box unit with a cross-section of three box holes. The steel box unit is then flipped over so that the top plate 1 is... Figure 5 Rotate to the following state Figure 4 In the top position, the bottom plate 2 is fully welded to the three hollow partitions 5, angle steel 11, and T-shaped longitudinal ribs 6 from a top view.

[0038] During the prefabrication of the steel box unit, with the top plate 1 in the lower position, the middle web plate 3, outer web plate 4, and hollow partition plate 5 are fully welded to the top plate 1 from a top-down view, and the bottom plate 2 is spot welded. The steel box unit is then flipped over, with the top plate 1 in the upper position, and the bottom plate 2 is fully welded to the hollow partition plate 5 from a top-down view within the space of the hollow partition plate 5. This solves the problem of having to weld from below when welding the connection between the bottom of the top plate and the web plate and the top of the side sealing plate in the passage, and avoids the labor intensity of welding from below.

[0039] The assembly steps for the berthing pontoon are as follows.

[0040] Prefabricated steel box units are transported to the dock site by vehicle. Multiple steel box units are assembled to form a larger berthing pontoon. Figure 1 , Figure 6 The top plate 1, bottom plate 2, and outer web plate 4 of the steel box units are fixedly installed by bevel welding at the joints; at this time, transversely distributed solid web partitions 10 are welded and fixedly installed in the middle of the berthing pontoon, and longitudinal angle steel 11 on the outer periphery of the hollow web partitions 5 penetrate the solid web partitions 10, such as... Figures 7 to 8 End caps 12 are welded and fixed at both ends of the berthing pontoon. Waist plates 13 are welded and fixed to the middle of both the end caps 12 and the solid web partition 10. Vertically distributed angle steel 11 is welded and fixed to the waist plates 13, with its upper and lower ends welded to the angle steel 11 that longitudinally penetrates the solid web partition 10. (See...) Figures 6 to 8 The solid web partition 10 separates the middle web plate 3 and the outer web plate 4 between the steel box units.

[0041] The solid-web bulkheads 10 within the mooring pontoon and the space between the solid-web bulkheads 10 and the end cap 12 form independent communicating spaces, such as... Figure 6 As shown, concrete is poured into the connected space, and the berthing pontoon is lowered into the sea with a certain draft. Counterweights are installed inside the berthing pontoon to adjust the draft and maintain the draft balance.

[0042] The outer web plate 4 at each of the four corners of the berthing pontoon has a draft gauge line 14 greater than 3m. Figure 4 The diagram shows a location where the draft gauge line is used to observe the draft depth after the buoy is launched into the sea.

[0043] The joints of the top plate 1, bottom plate 2, and outer web plate 4 of the steel box units are staggered. Figure 2 , Figure 3 As shown, the top plate 1 of the previous steel box unit is welded to the top surface of the outer web plate 4 of the next steel box unit, and the bottom plate 2 of the next steel box unit is welded to the bottom surface of the outer web plate 4 of the previous steel box unit, so that the splicing seams of the top plate 1, the splicing seams of the outer web plate 4, and the splicing seams of the bottom plate 2 present a staggered joint structure.

[0044] This application discloses a steel box unit assembly structure for a large berthing pontoon, comprising:

[0045] The bottom plate 2 and the top plate 1 are provided. The bottom plate 2 has outer web plates 4 on both sides. The outer web plates 4 are welded and fixed to the top plate 1 and the bottom plate 2 respectively.

[0046] There are two spaced-apart intermediate webs 3 between the outer webs 4. The intermediate webs 3 are welded and fixed to the top plate 1 and the bottom plate 2 respectively.

[0047] Hollow partitions 5 are welded and fixedly installed between the middle web plates 3 and between the middle web plates 3 and the outer web plates 4. Round tubes 8 are welded and fixedly installed inside the hollow partitions 5. A column 7 is welded and fixedly installed in the middle of the hollow partition 5. T-shaped longitudinal ribs 6 are welded and fixedly installed above and below the column 7.

[0048] The hollow partitions 5 between the middle web plates 3 are hollow annular plates; the hollow partitions 5 between the middle web plate 3 and the outer web plate 4 are C-shaped hollow annular plates. See Figures 4 to 5 As shown.

[0049] Angle steels 11 are welded and fixedly installed at intervals on the outer periphery of the hollow partition 5. The angle steels 11 transmit the forces borne by various parts of the box to the hollow partition 5 for dispersion.

[0050] The steel box of this application transmits and disperses the force it bears through the hollow partition 5 and the angle steel 11 distributed at intervals around the outer perimeter of the hollow partition 5, which solves the problem that the box cannot bear the force evenly when it is subjected to local stress.

[0051] After multiple steel box units are prefabricated, they are transported from the prefabrication plant to the dock, where they need to be hoisted and assembled. The existing box structure is shown in Chinese Patent Publication No. CN207311773U. To meet the hoisting requirements, lifting lugs are installed on the top plate, which is not conducive to transporting the steel box units through transportation roads with limited height.

[0052] The present application discloses a lifting lug structure for mooring a pontoon, comprising:

[0053] A lifting lug plate 15 is fixed to the web plate 3. The lifting lug plate 15 has lifting holes for connecting to cables or hooks on cables. A cable passage hole 16 is provided on the top plate 1 above the lifting lug plate 15, allowing cables to enter. The lifting lug plate 15 is welded and fixed to the web plate 3 via a reinforcing plate 17. (See figure) Figure 9 , Figure 4 As shown.

[0054] A reinforcing seat 18 larger than the lug plate 15 is welded and fixed to the middle web plate 3 located on the back of the lug plate 15. The reinforcing seat 18 increases the deformation resistance of the back of the middle web plate 3.

[0055] The middle web plate 3 is welded and fixed with the top plate 1 and the bottom plate 2 on the upper and lower sides respectively. The outer web plate 4 is located on the outer side of the middle web plate 3. The outer web plate 4 is welded and fixed with the top plate 1 and the bottom plate 2 on the upper and lower sides respectively. The top plate 1, the bottom plate 2, the middle web plate 3, and the outer web plate 4 constitute a steel box unit with a three-hole structure.

[0056] The lifting lug 15 is located on the middle web 3 inside the space between the top plate 1 and the bottom plate 2. The middle web 3 does not occupy the height dimension of the steel box unit, so that the steel box unit can be manufactured to the maximum height limit of the transportation road conditions during prefabrication. This solves the problem that the lifting lug is on the top plate, which is not conducive to the transportation of the steel box unit through the limited transportation road conditions.

[0057] A manhole is provided on the top plate 1 near the cable hole 16. An openable cover plate 19 is installed on the top plate 1 at the manhole. A ladder 20 is provided on the middle web plate 3 below the manhole. Figure 4 As shown; when pouring concrete into the internal space of the steel box unit assembly structure of the large berthing pontoon, the concrete pump pipe extends through the manhole, and the internal gas is exhausted through the cable passage hole 16, so that the air containing dust inside the berthing pontoon can be quickly discharged. After the concrete pouring is completed, the cable passage hole 16 is sealed and welded with a steel plate. Figure 1 Cable hole 16 is not shown in the diagram.

[0058] When berthing pontoons are moored to the dock, buffers need to be installed to prevent hard collisions between the pontoons and the dock. Existing technology (see Chinese Patent Publication No. CN119975707A) uses elastic marine baffles to provide elastic buffers to avoid collisions. However, when the sides of the pontoon have thin outer web plates, this can easily lead to localized indentation and deformation of the outer web plates due to stress.

[0059] This application discloses a fender structure for mooring pontoons, comprising:

[0060] Multiple steel box units constitute the berthing pontoon. A bracket is welded and fixedly installed on the outer web plate 4 of the steel box unit. A rubber body 26 is bonded and fixedly connected to the bracket. The rubber body 26 and the bracket form a fender structure on the outer web plate 4 of the berthing pontoon that provides elastic cushioning.

[0061] The bracket consists of vertical plates 22, longitudinal plates 23, and a mounting panel 21. Multiple vertical plates 22 and longitudinal plates 23 are welded and fixed perpendicularly and alternately. The multiple vertical plates 22 and longitudinal plates 23 are in multiple fixed contacts with the outer web plate 4. The mounting panel 21 is welded and fixed to the vertical plates 22 and longitudinal plates 23, and the rubber body 26 is fixed to the mounting panel 21. See [link / reference] Figure 4 , Figure 1 . Figure 1 Multiple fender structures are shown on the left side of the middle section. These fender structures are located on the outer periphery of the mooring pontoon and can be installed as needed.

[0062] The powered vessel is pulled by the towing cable connected to the towing cable point 25 of the berthing pontoon. When it approaches the dock, the mooring cable is used to bypass the mooring bollard 24 on the berthing pontoon and connect with the dock. When the rubber body 26 comes into contact with the dock, the collision force received by the rubber body 26 is distributed to the outer web plate 4 through the mounting panel 21 through multiple vertical plates 22 and multiple longitudinal plates 23, which solves the problem of local stress causing dent deformation of the outer web plate.

Claims

1. A large berthing pontoon of a steel box unit composite structure, characterized by, The utility model relates to a steel box unit for dispersing force, comprising: a plurality of angle steels (11) for dispersing force; the steel box unit comprises a bottom plate (2) and a top plate (1), the bottom plate (2) is provided with outer webs (4) on both sides, the outer webs (4) are welded and fixed with the top plate (1) and the bottom plate (2) correspondingly, two middle webs (3) are distributed between the outer webs (4), the middle webs (3) are welded and fixed with the top plate (1) and the bottom plate (2) correspondingly, and hollow diaphragms (5) are welded and fixed between the middle webs (3) and between the middle webs (3) and the outer webs (4); the hollow diaphragms (5) are provided with the angle steels (11) welded and fixed at intervals around the periphery, and the angle steels (11) transmit the force received by the box body to the hollow diaphragms (5) for dispersion; the hollow diaphragms (5) are provided with circular tubes (8) welded and fixed inside, the middle hollow diaphragms (5) are provided with vertical columns (7) welded and fixed in the middle, and the vertical columns (7) are provided with T-shaped longitudinal ribs (6) welded and fixed above and below; the middle webs (3) are provided with lifting lug plates (15) fixed thereon, the lifting lug plates (15) are provided with lifting holes, and the top plate (1) near the lifting lug plates (15) is provided with a cable passing hole (16) for entering a cable.

2. The steel box unit assembly structure of a large berthing caisson according to claim 1, wherein: the top plate (1) near the cable passing hole (16) is provided with a manhole, the top plate (1) near the manhole is provided with an openable cover plate (19), and the middle web (3) below the manhole is provided with a crawling ladder (20).

3. The steel box unit assembly structure of the large berthing caisson according to claim 1, wherein: the outer webs (4) are provided with supports fixed thereon, the supports are provided with rubber bodies (26) fixedly connected thereto, and the rubber bodies (26) and the supports form a fender structure for providing elastic buffering on the outer webs (4) of the berthing pontoon.

4. The steel box unit assembly structure of the large berthing caisson according to claim 3, characterized by: the supports are composed of vertical plates (22), longitudinal plates (23) and mounting panels (21), a plurality of vertical plates (22) and a plurality of longitudinal plates (23) are perpendicularly and staggeredly welded and fixed, and the plurality of vertical plates (22) and the plurality of longitudinal plates (23) are fixedly contacted with the outer webs (4) at multiple positions; the mounting panels (21) are welded and fixed on the vertical plates (22) and the longitudinal plates (23), and the rubber bodies (26) are fixed on the mounting panels (21).

5. The steel box unit assembly structure of the large berthing caisson according to claim 1, wherein: the hollow diaphragms (5) between the middle webs (3) are hollow annular plates, and the hollow diaphragms (5) between the middle webs (3) and the outer webs (4) are C-shaped hollow annular plates.

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