Manufacturing and splicing process method of large berthing buoyancy tank

Abstract

The invention discloses a manufacturing and assembling process method of a large berthing buoyancy tank, which comprises the following steps of: firstly, finishing overlook full welding of a middle web plate, an outer web plate, a hollow partition plate and a top plate and spot welding of a bottom plate in a state that the top plate is at the lower part; the steel box unit is turned over, overlook full welding of the bottom plate and the hollow partition plate is completed in the space of the hollow partition plate in the state that the top plate is located above, the problem that upward welding is needed when the bottom of the top plate is welded to the joint of the web plate and the top of the side sealing plate in a channel is solved, and the labor intensity of upward welding operation is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to a manufacturing and assembling process method of a large-scale berthing pontoon, and belongs to the technical field of offshore floating platforms. BACKGROUND

[0002] The berthing pontoon is used for forming a floating platform at sea and can be used for sea cargo transportation, offshore operation platforms and the like. For the berthing pontoon body, a plurality of prefabricated pontoon units are assembled to form the berthing pontoon body, as disclosed in the Chinese patent with the announcement number CN208802126U.

[0003] The existing prefabricated pontoon unit technology, as disclosed in the Chinese patent with the announcement number CN217460217U, can complete the welding between the bottom plate and the top plate, and between the web plate and the bottom plate and the top plate in the channel. However, the welding between the top plate bottom and the web plate and the side sealing plate top needs to be performed in an upward welding manner, which leads to high labor intensity. SUMMARY

[0004] To solve the above technical problems, the application provides a manufacturing and assembling process method of a large-scale berthing pontoon.

[0005] The application is implemented by the following technical solutions.

[0006] The application provides a manufacturing and assembling process method of a large-scale berthing pontoon, which comprises the following steps. The steel pontoon unit needs to be turned over to perform the full-welding in a top view manner to realize the prefabricated manufacturing process.

[0007] The manufacturing process comprises the following steps. Two top plates are first laid in a downward state and welded, and T-shaped longitudinal ribs and angle steels are welded and fixed to the top plates. An intermediate hollow partition plate is welded and fixed to the middle part of the top plate, and angle steels and longitudinal middle web plates are welded and fixed to the two sides of the intermediate hollow partition plate, and a stand and a circular pipe are welded and fixed to the intermediate hollow partition plate. The hollow partition plates on the two sides of the top plate are welded and fixed, and the angle steels and the circular pipes are welded and fixed, and the outer web plates are welded and fixed on the two sides of the top plate, and the outer web plates are welded and fixed to the hollow partition plates on the two sides; the angle steels and the T-shaped longitudinal ribs on the top of the three hollow partition plates are welded and fixed; at this time, the full-welding of the middle web plate, the outer web plate and the hollow partition plate in the top view is completed. The bottom plate is placed on the top of the three hollow partition plates to be temporarily fixed and connected by spot welding, and a steel pontoon unit with a three-box hole cross section is formed, and the steel pontoon unit is turned over to perform the full-welding of the bottom plate, the three hollow partition plates, the angle steels and the T-shaped longitudinal ribs in the top view.

[0008] The manufacturing process further comprises: transporting the prefabricated steel box units to a wharf site by vehicle, and assembling the plurality of steel box units to form the berthing float.

[0009] The middle part of the berthing float is welded and fixedly installed with transversely distributed solid-web diaphragms, and the outer periphery of the hollow-web diaphragms is longitudinally penetrated by angle steels; the two ends of the berthing float are welded and fixedly installed with end plates, and the middle part of the end plates and the solid-web diaphragms are welded and fixedly installed with waist plates; the waist plates are welded and fixedly installed with vertically distributed angle steels at the upper and lower ends, and are welded and fixed with the angle steels longitudinally penetrating the solid-web diaphragms; and the solid-web diaphragms separate the middle web plates and the outer web plates between the steel box units.

[0010] The manufacturing process further comprises: forming independent communication spaces between the solid-web diaphragms in the berthing float and between the solid-web diaphragms and the end plates; pouring concrete into the communication spaces; submerging the berthing float to a certain water level; and installing counterweights in the berthing float to adjust the water depth and the water balance.

[0011] The berthing float is provided with a water level scale line at the four corners.

[0012] The berthing float is provided with a tow cable point, a bitt and a manhole at the top, and the middle web plate below the manhole is provided with a ladder.

[0013] The top plate, the bottom plate and the outer web plate of the steel box units are misaligned at the splicing joints.

[0014] The berthing float is provided with a plurality of fender structures at the outer periphery of the side edges.

[0015] The beneficial effects of the present application are as follows: the middle web plate, the outer web plate, the hollow-web diaphragm and the top plate are fully welded from the top view in the state that the top plate is at the bottom, and the bottom plate is spot welded; the steel box unit is turned over to the state that the top plate is at the top, and the bottom plate and the hollow-web diaphragm are fully welded from the top view in the space of the hollow-web diaphragm, thereby solving the problem that the welding needs to be performed from the top view when the bottom part of the top plate and the web plate and the top part of the side plate are connected in the channel, and avoiding the labor intensity of the welding operation from the top view. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the berthing float of the present application; Figure 2 is a top view structural schematic diagram of the misalignment of the splicing joints of the top plate and the outer web plate of the present application; Figure 3 is a bottom view structural schematic diagram of the misalignment of the splicing joints of the outer web plate and the bottom plate of the present application; Figure 4 is a structural schematic diagram of the longitudinal distribution of the three steel box units of the present application; Figure 5 is a structural schematic diagram of the state that the top plate is at the bottom of the present application; Figure 6is the structural schematic diagram of the invention when the docking pontoon shows the structure of the full-web bulkhead; Figure 7 is the structural schematic diagram of the invention when the full-web bulkhead, the web plate is distributed; Figure 8 is the structural schematic diagram of the invention when the full-web bulkhead, the full-web bulkhead, the web plate is distributed; Figure 9 is the structural schematic diagram of the invention when the lug plate, the web plate is distributed. DETAILED DESCRIPTION

[0017] The technical solutions of the invention are further described below, but the scope of protection is not limited to the description.

[0018] Referring to the drawings attached Figures 1 to 9 in the description.

[0019] A large docking pontoon manufacturing and assembling process method of the present application comprises two steps of prefabrication of steel box units and assembling of the docking pontoon.

[0020] The prefabrication steps of the steel box unit are as follows.

[0021] 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 full-web bulkheads 5.

[0022] Two top plates 1 are first laid and welded in the under state, which can be understood as rotating the middle top plate 1 from the on state to the under state of the top plate 1. Figure 4 Figure 5 The T-shaped longitudinal rib 6 and the angle steel 11 are welded and fixed to the top plate 1.

[0023] The middle full-web bulkhead 5 is welded and fixed to the middle of the top plate 1, and the angle steel 11 and the longitudinal middle web plate 3 are welded and fixed on both sides of the middle full-web bulkhead 5. The stand 7 and the round pipe 8 are welded and fixed on the middle full-web bulkhead 5.

[0024] The full-web bulkheads 5 on both sides of the top plate 1 are welded and fixed, and the angle steel 11 and the round pipe 8 are welded and fixed on both sides of the full-web bulkheads 5. The outer web plate 4 is welded and fixed on both sides of the top plate 1, and the outer web plate 4 is welded and fixed with the full-web bulkheads 5 on both sides. The angle steel 11 and the T-shaped longitudinal rib 6 on the top of the three full-web bulkheads 5 are welded and fixed. At this time, the top plate 1, the middle web plate 3, the outer web plate 4, and the full-web bulkhead 5 are fully welded from the top.

[0025] The bottom plate 2 is placed on the top of the three full-web bulkheads 5 to temporarily fix and connect by spot welding, forming a steel box unit with a three-box hole cross section. The steel box unit is turned over, and the top plate 1 is rotated from the under state to the middle on state. Figure 5 Figure 4 The bottom plate 2 is fully welded with the three full-web bulkheads 5, the angle steel 11, and the T-shaped longitudinal rib 6.​​

[0026] In the prefabrication process of the steel box unit, the middle web plate 3, the outer web plate 4, the hollow web plate 5 and the top plate 1 are fully welded in the top-down state of the top plate 1, and the bottom plate 2 is spot welded; the steel box unit is turned over, and the bottom plate 2 and the hollow web plate 5 are fully welded in the top-down state of the top plate 1 in the space of the hollow web plate 5, thereby solving the problem of welding the top plate bottom and the web plate and the top portion of the side sealing plate in the channel in the top-down welding mode, and avoiding the labor intensity of the top-down welding operation.

[0027] The assembling steps of the berthing float are as follows.

[0028] The prefabricated steel box unit is transported to the wharf site by vehicle, and multiple steel box units are assembled to form the berthing float, as shown in Figure 1 、 Figure 6 ; the top plate 1, the bottom plate 2 and the outer web plate 4 between the steel box units are fixedly installed by groove welding; at this time, the transversely distributed solid web plate 10 is fixedly installed in the middle of the berthing float, the outer peripheral longitudinal angle steel 11 of the hollow web plate 5 penetrates the solid web plate 10, as shown in Figures 7 to 8 ; the end sealing plate 12 is fixedly installed at both ends of the berthing float, the waist plate 13 is fixedly installed in the middle of the end sealing plate 12 and the solid web plate 10, the vertically distributed angle steel 11 at the upper and lower ends of the waist plate 13 is fixedly installed by welding and fixedly installed with the angle steel 11 penetrating the solid web plate 10 longitudinally, as shown in Figures 6 to 8 ; the solid web plate 10 separates the middle web plate 3 and the outer web plate 4 between the steel box units. The bottom of the berthing float is lifted by inflating the air bag, and is pushed into the water by the shovel.

[0029] The solid web plates 10 in the berthing float and between the solid web plate 10 and the end sealing plate 12 form independent communication spaces, as shown in Figure 6 ; the concrete is poured into the communication spaces, the berthing float is launched into the water, and the counterweight is installed in the berthing float to adjust the water depth and the water balance.

[0030] The outer web plate 4 at each of the four corners of the berthing float has a water depth scale line 14, Figure 4 which is shown at one place, and is used to observe the water depth of the berthing float after being launched into the water.

[0031] The splicing joints of the top plate 1, the bottom plate 2 and the outer web plate 4 between the steel box units present a staggered joint structure, as shown in Figure 2 、 Figure 3 ; the top plate 1 of the previous steel box unit is welded to the top surface of the outer web plate 4 of the subsequent steel box unit, and the bottom plate 2 of the subsequent steel box unit is welded to the bottom surface of the outer web plate 4 of the previous steel box unit, so that the top plate 1 splicing joint, the outer web plate 4 splicing joint and the bottom plate 2 splicing joint present a staggered joint structure.

[0032] The cross section of the steel box unit is a three-box hole structure, and a stable support needs to be formed in the middle of the steel box unit. The existing steel box unit middle support is disclosed in Chinese Patent No. CN202295235U, which uses vertical longitudinal bulkhead columns for strengthening support in the middle of the box body. However, when subjected to local force, the box body cannot uniformly bear force.

[0033] The steel box unit of the mooring pontoon of the application comprises: The bottom plate 2 and the top plate 1, the two sides of the bottom plate 2 have outer webs 4, and the outer webs 4 are welded and fixed to the top plate 1 and the bottom plate 2 correspondingly.

[0034] There are two interval-distributed middle webs 3 between the outer webs 4, and the middle webs 3 are welded and fixed to the top plate 1 and the bottom plate 2 correspondingly.

[0035] The middle webs 3 are welded and fixed to install hollow partitions 5 between each other and between the middle webs 3 and the outer webs 4, the hollow partitions 5 are welded and fixed to install circular pipes 8, and the middle webs 3 are welded and fixed to install vertical columns 7 in the middle of the hollow partitions 5, and the vertical columns 7 are welded and fixed to install T-shaped longitudinal ribs 6.

[0036] The hollow partitions 5 between the middle webs 3 are hollow annular plates; and the hollow partitions 5 between the middle webs 3 and the outer webs 4 are C-shaped hollow annular plates. See Figures 4 to 5 illustrated.

[0037] The hollow partitions 5 are welded and fixed to install angle steels 11 at intervals around the periphery, and the multiple angle steels 11 transmit the force borne by the box body in each local part to the hollow partitions 5, and then transmit and disperse the force through the multiple angle steels 11.

[0038] The steel box of the application transmits and disperses the force borne by the box body through the three hollow partitions 5 and the angle steels 11 distributed at intervals around the periphery of the hollow partitions 5, solving the problem that the box body cannot uniformly bear force when subjected to local force.

[0039] After the multiple steel box units are prefabricated, they are transported from the prefabrication plant to the wharf, and the steel box units need to be hoisted and spliced. The existing box body disclosed in Chinese Patent No. CN207311773U is provided with lifting lugs on the top plate to meet the hoisting needs, which is not conducive to the transportation of the steel box unit through the limited-height transportation road conditions.

[0040] The lifting lug structure of the mooring pontoon of the application comprises: The lifting lug plate 15 is fixed on the middle web 3, and the lifting lug plate 15 is provided with a lifting hole to be connected with a cable or a hook on the cable; the top plate 1 at the top of the lifting lug plate 15 is provided with a cable passing hole 16 for the cable to enter, and the lifting lug plate 15 is welded and fixed to the middle web 3 through a reinforcing plate 17. See Figure 9 , Figure 4 illustrated.

[0041] A reinforcing seat 18 larger than the lug plate 15 is welded and fixed to the middle web 3 at the back of the lug plate 15 , and the reinforcing seat 18 increases the anti-deformation strength of the back of the middle web 3 .

[0042] The middle web 3 is welded and fixed with the top plate 1 and the bottom plate 2 in correspondence with each other on the upper and lower sides. An outer web 4 is provided on the outside of the middle web 3. The outer web 4 is welded and fixed with the top plate 1 and the bottom plate 2 in correspondence with each other on the upper and lower sides. The top plate 1, the bottom plate 2, the middle web 3 and the outer web 4 constitute a steel box unit with a three-box hole structure.

[0043] The lifting ear plate 15 is located on the middle web 3 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 made at the maximum height limit of the transportation road conditions during prefabrication, solving the problem that the lifting ear is on the top plate, which is not conducive to the transportation of the steel box unit through the limited height transportation road conditions.

[0044] The top plate 1 near the cable hole 16 is provided with a manhole, the top plate 1 at the manhole is installed with an openable cover 19, and the middle web 3 below the manhole is provided with a ladder 20. Figure 4 When pouring concrete into the internal space of the steel box unit of the mooring pontoon, the concrete pump pipe extends from the manhole, and the internal gas is exhausted from the cable hole 16, so that the air containing dust in the mooring pontoon is quickly discharged. After the concrete pouring is completed, the steel plate is used to seal the cable hole 16 and weld it. Figure 1 The cable hole 16 is not shown.

[0045] When mooring a pontoon to a dock, a buffer is required to prevent collisions between the pontoon and the dock. Prior art (see Chinese patent application publication number CN119975707A) uses elastic marine handles to provide a buffer to prevent collisions. However, when the pontoon's side panels have thin outer webs, this can easily cause localized deformation and concavity under stress.

[0046] The present invention provides a fender structure for a berthing pontoon, comprising: The berthing pontoon comprises multiple steel box units, and a bracket is welded and fixedly installed on the outer web 4 of the steel box unit, and 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 4 of the berthing pontoon that provides elastic buffering.

[0047] The bracket is composed of vertical plates 22, longitudinal plates 23, and a mounting panel 21. The vertical plates 22 and longitudinal plates 23 are welded and fixed vertically and staggered. The vertical plates 22 and longitudinal plates 23 are in fixed contact with the outer web 4 at multiple locations. 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. Figure 4 、 Figure 1 . Figure 1The left side of the center shows a plurality of fender structures, which are arranged at the outer circumferential side of the berthing float. The fender structures can be arranged as needed.

[0048] The power ship pulls the berthing float through the towing cable connection of the towing cable point 25, and when approaching the wharf, the mooring cable is used to pass around the bitt 24 on the berthing float to be connected to the wharf. When the rubber body 26 contacts and collides with the wharf, the collision force received by the rubber body 26 is transmitted to the outer web plate 4 through the installation panel 21, the plurality of vertical plates 22 and the plurality of longitudinal plates 23, which are vertically staggered and dispersed at multiple positions, to solve the problem of local indentation deformation of the outer web plate under force.

Claims

1. A method for manufacturing and assembling a large berthing pontoon, characterized in that: include: The steel box unit needs to be turned over and fully welded from above to realize the prefabrication process; The manufacturing process includes: The two top plates (1) are first laid in a downward position and welded, and the T-shaped longitudinal ribs (6) and angle steels (11) are welded and fixed to the top plates (1); The middle hollow partition (5) is welded and fixed to the middle of the top plate (1), angle steels (11) and longitudinal middle webs (3) are welded and fixed on both sides of the middle hollow partition (5), and columns (7) and round tubes (8) are welded and fixed on the middle hollow partition (5); The hollow bulkheads (5) on both sides of the top plate (1) are welded and fixed, and the hollow bulkheads (5) on both sides are welded and fixed with angle steels (11) and round tubes (8). The outer webs (4) are welded and fixed on both sides of the top plate (1), and the outer webs (4) are welded and fixed to the hollow bulkheads (5) on both sides; the angle steels (11) and T-shaped longitudinal ribs (6) on the tops of the three hollow bulkheads (5) are welded and fixed; at this point, the top view full welding of the middle web (3), the outer web (4), the hollow bulkheads (5) and the top plate (1) is completed; The bottom plate (2) is placed on top of the three hollow partitions (5) and spot welded to temporarily fix the connection, forming a steel box unit with a cross section of three box holes. The steel box unit is turned over, and the bottom plate (2) is fully welded with the three hollow partitions (5), angle steel (11), and T-shaped longitudinal ribs (6) from a top view.

2. The method for manufacturing and assembling a large-scale mooring pontoon according to claim 1, characterized in that: The manufacturing process also includes: transporting the prefabricated steel box units to the dock site by vehicle, and assembling multiple steel box units to form a berthing pontoon.

3. The method for manufacturing and assembling a large-scale mooring pontoon according to claim 2, characterized in that: A transversely distributed solid bulkhead (10) is welded and fixedly installed in the middle of the mooring pontoon, and a longitudinal angle steel (11) on the outer periphery of the hollow bulkhead (5) passes through the solid bulkhead (10); end sealing plates (12) are welded and fixedly installed at both ends of the mooring pontoon, and waist plates (13) are welded and fixedly installed in the middle of the end sealing plates (12) and the solid bulkhead (10). The waist plates (13) are welded and fixedly installed by welding the upper and lower ends of the vertically distributed angle steel (11) and the angle steel (11) that passes through the solid bulkhead (10) longitudinally. The solid bulkhead (10) separates the middle web (3) and the outer web (4) between the steel box units.

4. The method for manufacturing and assembling a large-scale mooring pontoon according to claim 3, characterized in that: The manufacturing process also includes: forming independent connecting spaces between the solid bulkheads (10) in the mooring pontoon and between the solid bulkheads (10) and the end sealing plates (12), pouring concrete into the connecting spaces, lowering the mooring pontoon into the sea for draft, and installing counterweights in the mooring pontoon to adjust the draft depth and draft balance.

5. The method for manufacturing and assembling a large-scale mooring pontoon according to claim 3, characterized in that: The four corners of the mooring buoy are provided with draft scale lines (14).

6. The method for manufacturing and assembling a large-scale mooring pontoon according to claim 3, characterized in that: The top of the mooring buoy is provided with a towing point (25), a mooring pile (24) and a manhole, and the middle web (3) below the manhole is provided with a ladder (20).

7. The method for manufacturing and assembling a large-scale mooring pontoon according to claim 1, characterized in that: The joint seams of the top plate (1), the bottom plate (2), and the outer web (4) between the steel box units are staggered.

8. The method for manufacturing and assembling a large-scale mooring pontoon according to claim 2, characterized in that: The outer peripheral side of the mooring pontoon is provided with a plurality of fender structures.

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