CN112046694B

CN112046694B - Transformation method based on unmanned barge and bottom-seated full-rotation lifting barge

Info

Publication number: CN112046694B
Application number: CN202010856177.7A
Authority: CN
Inventors: 叶昊; 陈世海; 乔国瑞; 施海涛; 张禹
Original assignee: 708th Research Institute of CSIC
Current assignee: 708th Research Institute of CSIC
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-10-08
Anticipated expiration: 2040-08-24
Also published as: CN112046694A

Abstract

The invention discloses a transformation method based on unmanned cargo barge and a transformed bottom-sitting type full-rotation lifting barge. The transformation method comprises the following steps: cutting off partial sections of a cargo hold area of the parallel middle body of the unmanned barge, splicing the front and rear sections of the barge after the sections of the parallel middle body are cut off into a main hull of the bottom-sitting type lifting barge, and taking a reinforcement measure for the local part of the main hull of the bottom-sitting type lifting barge; a cabin, a pump cabin, a ballast system and an oil-water cabin are additionally arranged below the main deck; a main crane is arranged at the tail part above the main deck, and a chimney, a bow building and a deck chamber are additionally arranged at the head part; and a positioning anchor system and outfitting equipment are additionally arranged. The unmanned barge is transformed into a bottom-seated full-rotation hoisting barge, so that the operation requirements of different hoisting weights and different hoisting heights of offshore floating hoisting operation can be met, the bottom-seated hoisting operation requirements of special engineering projects such as marine accident rescue and salvage of stranded accident ships in shallow water reef areas or wind power equipment installation in coastal shoal water areas can also be met, and the engineering application range is wide.

Description

Transformation method based on unmanned barge and bottom-seated full-rotation lifting barge

Technical Field

The invention relates to a transformation method based on an unmanned barge, in particular to a transformation method for transforming the unmanned barge with a certain parallel middle body length into a bottom-seated full-rotation hoisting barge, and belongs to the technical field of hoisting ships.

Background

With the rapid development of the current engineering industry such as marine oil development, large-scale offshore engineering construction, coastal wind power equipment installation, salvage and rescue of marine perils and the like, the demand of the crane ship is increasing as a common engineering ship. The prior full-rotation floating crane ship built in China does not have the function of bottom setting, and can not effectively realize the bottom setting and lifting operation of engineering projects such as marine accident rescue and salvage of stranded wrecking ships in shallow water reef areas or wind power equipment installation in coastal shoal water areas.

The bottom-sitting type full-rotation crane ship has the same offshore floating type hoisting operation function as a conventional floating type crane ship, and can also realize the hoisting operation function in a bottom-sitting state in a shallow water reef area or a shoal. Compared with the conventional crane ship, the bottom-sitting type full-rotation crane ship is provided with huge hoisting equipment, load adjusting equipment and a supporting structure, and the factors of ship stability, structural total longitudinal strength and local strength under the working conditions of dispatching navigation and floating hoisting operation, substrate bearing capacity under the sea condition of a bottom-sitting operation water area, overturning resistance, sliding resistance, bottom-sitting stability, structural strength of a bottom-sitting operation ship body and the like are considered. Due to the factors, a large amount of capital needs to be invested for building a bottom-sitting type full-rotation crane ship, the building period is long, and the overall project progress of project projects such as marine salvage or wind power equipment installation is influenced.

The large unmanned barge deck has large space, usually adopts a single-layer continuous longitudinal deck, has a parallel middle body with a certain length, has a simple and firm structure, can be relatively large in space for transformation and utilization, and is relatively small in transformation engineering quantity. If the ship is refitted into the bottom-sitting type full-rotation crane ship with low cost and short time on the basis of unmanned cargo barge, the requirements of offshore floating crane operation and bottom-sitting crane operation of special engineering projects such as salvage of marine perils in shallow water reefs or installation of coastal shoal wind power equipment can be met, and a new idea and a new way are provided for the reconstruction of large barges and the development and reutilization of old ships. Therefore, a method for transforming a large unmanned barge into a submersible type full-rotation crane ship is sought, and the method has great industrial utilization value and economic benefit.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: compared with a newly-built crane ship, the method for transforming the unmanned barge into the sit-bottom crane ship and the sit-bottom full-rotation crane barge have the advantages that the original investment cost is low, the construction period is short, the influence on the progress of the whole project is small by developing and recycling the old barge, and the floating crane operation and the sit-bottom crane operation can be realized.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a transformation method based on unmanned barge, which is characterized in that a transformation area of the unmanned barge comprises a main deck area and a parallel middle body cargo hold area, and comprises the following steps:

cutting off partial sections of a cargo hold area of the parallel middle body of the unmanned cargo barge, welding and splicing the front and rear sections of the unmanned cargo barge after the sections of the parallel middle body are cut off to form a main hull of the bottom-sitting type lifting barge, and taking reinforcement measures for the local part of the main hull of the bottom-sitting type lifting barge;

a cabin, a pump cabin, a ballast system and an oil-water cabin are additionally arranged below the main deck;

a main crane is arranged at the tail part above the main deck, and a chimney, a bow building and a deck chamber are additionally arranged at the head part;

and a positioning anchor system and outfitting equipment are additionally arranged.

Preferably, a cargo hold hatch cover of the unmanned cargo barge is eliminated and sealed by a steel plate, the steel plate used for sealing and a plate structure between the original cargo hold hatch are properly reinforced, the requirement on the bearing capacity of a deck is ensured, and meanwhile, a gantry crane, a crane rail and other outfitting equipment on a main deck of the unmanned cargo barge are removed.

Preferably, the reinforcement means comprises at least one of the following means:

a middle longitudinal bulkhead and lateral longitudinal bulkheads at two sides of the middle longitudinal bulkhead are additionally arranged below the main deck to improve the total longitudinal strength of floating and bottom-sitting hoisting operation;

the arrangement density and the number of the side trusses are doubled in the double-layer bottom of the unmanned barge, and meanwhile, steel protecting bottom plates are arranged at the bottom of the ship and the bilge part to enhance the local strength and the bottom sitting capability of the bottom structure of the ship body;

the number and the arrangement density of reinforcing ribs on the watertight bulkhead of the cargo hold of the unmanned cargo barge are increased, the watertight transverse bulkhead is additionally arranged at the middle position of each cargo hold, and two horizontal trusses are additionally arranged in the two side hulls so as to improve the strength and the torsional strength for resisting the transverse environmental load during the hoisting operation of the sitting bottom.

Preferably, a part of the dead wood is cut off at the position where the dead wood bottom at the tail part of the main hull of the bottom-mounted lifting barge is tightly attached to the base line, so that the situation that the dead wood collides with the sea floor due to the tail inclination of the hull when the ship sinks and sits at the bottom is avoided.

Preferably, the main generator set is arranged in the engine room, and the power load requirements of various power equipment systems and cranes on the ship are met.

More preferably, an auxiliary equipment cabin, an oil distribution chamber, a distribution board and spare parts are arranged above a middle platform of the engine room, and liquid cabins such as a fuel oil storage cabin, a daily oil cabin, a fuel oil settling cabin and a lubricating oil cabin are arranged in the nearby area; reinforced cement is additionally arranged in the double-layer bottom below the engine room to enhance the local strength, and the reinforced cement can play a role in protecting the engine room section in a key way when bottom sitting operation is carried out on irregular reef bottom materials; liquid cabins are arranged above the double-layer bottom of the engine room and below the figured steel plate, and impurity liquid cabins such as a domestic sewage cabin, an oil residue cabin, a fuel oil overflow cabin, a fuel oil discharge cabin, a cabin bottom water cabin and the like are arranged in the liquid cabins.

Preferably, a ballast device is arranged in the pump chamber, and the ballast device comprises a ballast pump and a ballast water treatment device.

Preferably, the cargo hold, the two side empty holds and the fore-aft peak tank of the unmanned barge are transformed into ballast tanks.

More preferably, a ballast pipe tunnel cabin is additionally arranged at the bottom of the ballast tank, a ballast pipe system is arranged in the ballast pipe tunnel cabin and is controlled by a ballast control system, and functions of ballasting and load regulation are realized through the ballast tank, a ballast pump, the ballast pipe system, the ballast control system and the like.

Preferably, the bow building and the deck room are provided with crew cabins, a kitchen, a dining room, a food warehouse, a gymnasium, a dressing room, an air conditioner, an emergency generator room and CO according to requirements₂Room, laundry, meeting room, medical room and driver's cabin, it is refuted to have the engineering to refute to change former unmanned cargo barge.

Preferably, the main crane is of a full-rotation type and can rotate 360 degrees around a crane base, the crane base is connected with longitudinal and transverse bulkheads and a reinforcing frame in the ship body to ensure sufficient strength and rigidity, and a crane arm support shelf and a hook box are both arranged on an operation deck.

Preferably, a polyurethane cushion strip is additionally arranged at the bottom of the main hull of the bottom-mounted lifting barge; the polyurethane backing strip is installed in the longitudinal direction below the bottom protecting plate of the ship bottom to prevent the bottom from colliding during bottom sitting operation, and the friction coefficient of the bottom is increased, so that the anti-slip capacity is increased, the polyurethane backing strip is installed on the part of the ship bottom along the transverse direction according to the bottom condition and the sea condition of the bottom sitting operation area, and the key protection is performed on the part area.

Preferably, the positioning anchor system comprises four positioning anchors and correspondingly configured positioning winches, wherein the four positioning anchors are respectively additionally arranged at the tail part of a main deck and a bow deck of a main hull of the bottom-sitting type lifting barge to form an eight-point positioning anchor system, positioning and ship moving operation of the lifting barge is realized, and one positioning anchor close to the head part of the main hull of the bottom-sitting type lifting barge is also used as a navigation anchor.

Preferably, the outfitting equipment comprises:

lifesaving/rescue boats are arranged on two side sides of the main deck;

2 sets of towing riggings are respectively arranged at the head part and the tail part of the main hull of the bottom-mounted lifting barge;

and at least one of:

adding fender materials on two sides of the main hull of the bottom-mounted lifting barge;

paving a wood deck in the region of the working deck of the bottom-mounted lifting barge;

and a detachable breakwater plate with the height of 2-3 m is additionally arranged at the side position of a main deck of a main hull of the bottom-sitting type lifting barge.

The invention also provides a bottom-sitting type full-rotation lifting barge which is transformed by the transformation method based on the unmanned barge.

Compared with the prior art, the invention has the beneficial effects that: the unmanned barge is transformed into a bottom-seated full-rotation hoisting barge, so that the operation requirements of different hoisting weights and different hoisting heights of offshore floating hoisting operation can be met, the bottom-seated hoisting operation requirements of special engineering projects such as marine accident rescue and salvage of stranded accident ships in shallow water reef areas or wind power equipment installation in coastal shoal water areas can also be met, and the engineering application range is wide; compared with a newly built crane ship, the large unmanned barge has the advantages of low investment cost, short construction period and small influence on the whole engineering progress, provides a new idea and a new way for the transformation and the recycling of the large unmanned barge and the development of an old ship, and has high industrial utilization value and economic benefit.

Drawings

Fig. 1a and 1b are a front view and a top view, respectively, of an unmanned barge arrangement before being modified by the modification method of the invention;

FIG. 2 is a front view of the general layout of a fully slewing jack-up barge after being retrofitted in accordance with the retrofitting method of the present invention;

FIG. 3 is a typical cross-sectional view of a submersible fully slewing jack-up barge after being retrofitted in accordance with the retrofitting methods of the present invention;

FIG. 4 is a schematic view of the arrangement of the inside of a cabin of a fully slewing jack-up barge after being transformed by the transformation method according to the invention;

FIG. 5 is a schematic view of the arrangement of the middle deck at the head of the fully slewing jack-up barge after being modified by the modification method;

FIG. 6 is a schematic view of the arrangement behind the bow of the main deck of the bottom-sitting type fully slewing crane barge reformed by the reforming method of the invention;

fig. 7 is a schematic layout of the deck of the bottom-seated fully-slewing jack-up barge according to the modification method of the invention.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

The invention relates to a bottom-sitting type full-rotation lifting barge which is formed by transforming an unmanned barge, and mainly comprises a main barge body, a full-rotation lifting device, an operation deck, a bow floor and a deck chamber, wherein functional cabins such as an engine room, a pump cabin, an auxiliary equipment cabin, an oil-water cabin and the like are arranged in the head part of the main barge body. The specific modification method is as follows: the sequence of steps included in the following modification method is not limited, and can be reasonably arranged according to actual conditions.

1) Reforming the main hull of the unmanned barge:

the original barge of the embodiment has the length of 171m, the profile width of 32m and the profile depth of 12m, as shown in figures 1 a-b. A cargo hold area is arranged between the head and tail anti-collision bulkheads of the original cargo barge, four large cargo holds are arranged, and two large hatch covers 1 are arranged on the deck of each cargo hold; a gantry crane 2, a crane rail 3 and other outfitting equipment are arranged on the main deck of the original cargo barge.

According to the factors of lifting capacity, the requirement of the laying length of a crane boom, total arrangement, floating state, stability and the like, the length of the modified ship is determined to be 125m, and the width and depth of the model are not required to be adjusted. Cutting off a partial section 4 of the cargo hold area of the middle body parallel to the original cargo barge, and splicing two ship body sections before and after the section of the cargo hold area to be cut off by welding to form a newly spliced main ship body 5 of the lifting barge, wherein the total length of the main ship body 5 is up to 125m, as shown in FIG. 2; removing a cargo hold hatch cover 1 on a main deck of the original barge, sealing the hatch cover by using a steel plate, properly reinforcing the steel plate for sealing and a plate structure between the original cargo hold hatches, ensuring a certain deck bearing capacity requirement, and removing a gantry crane 2, a crane rail 3 and other outfitting equipment on the main deck of the original barge; a middle longitudinal bulkhead 6 and two side longitudinal bulkheads 7 are additionally arranged below a main deck of a main hull to improve the total longitudinal strength of floating and bottom-sitting lifting operation, as shown in figure 3; the number of the inner side truss materials 8 of the double-layer bottom is doubled, and meanwhile, steel protecting bottom plates 9 with certain thicknesses are arranged at the bottom of the ship and the bilge part so as to enhance the structural strength and the bottom capability of the ship bottom during bottom-supported hoisting operation, as shown in figure 4; reinforcing ribs on the watertight bulkheads of the original cargo hold of the cargo barge are properly encrypted and reinforced, meanwhile, a watertight transverse bulkhead 10 is additionally arranged at the middle position of each cargo hold, and two horizontal trusses 11 are additionally arranged in the side double-shell to improve the strength and torsional strength for resisting transverse environmental loads (wave and flow loads and the like) during the lifting operation of the sitting bottom, as shown in fig. 3 and 4; a part of the dead wood is cut at the bottom of the stern dead wood 12 close to the base line so as to avoid the situation that the dead wood collides with the sea floor due to the tail inclination of the ship body when the ship sinks and sits at the bottom, as shown in figure 2.

2) Additionally provided with pump cabin and oil-water cabin

The original cargo hold area of the cargo barge below the main deck at the head of the main hull is transformed into cabins such as a cabin 13, a pump cabin 14, a fresh water cabin 15 and the like, various electric equipment systems and cranes on the ship are powered by a main power station, and a plurality of main generator sets are arranged in the cabin 13 according to the power load requirement of the whole ship, as shown in fig. 3; cabins such as an auxiliary equipment cabin 16, an oil separator chamber 17, a distribution board 18, a spare part chamber 19 and the like are arranged above a middle platform of the engine room section, and liquid cabins such as a fuel oil storage cabin, a daily oil cabin, a fuel oil settling cabin, a lubricating oil cabin and the like are arranged in the nearby area, as shown in fig. 5; reinforced cement 20 with a certain thickness is added in the double-layer bottom below the engine room section to enhance the local strength, the reinforced cement serves as a key protection for the engine room section when the bottom sitting operation is carried out on the irregular reef bottom, a liquid cabin 21 with the height of about 1 meter is arranged above the double-layer bottom of the engine room section and below the figured steel plate, and a domestic sewage cabin, an oil residue cabin, a fuel oil overflow cabin, a fuel oil discharge cabin, a cabin bottom water cabin and other miscellaneous liquid cabins are arranged in the liquid cabin, as shown in figure 2.

3) Adding ballast system

Ballast equipment such as a ballast pump 22, a ballast water treatment device 23 and the like are arranged in the pump compartment, the area of an original cargo hold of a middle and rear part is changed into a ballast tank 24, a side empty tank and a fore-and-aft tip tank of two sides are also changed into the ballast tank 24, a ballast pipe tunnel tank 25 is additionally arranged in a proper area at the bottom of the ballast tank, and the functions of ballasting and load adjustment are realized by arranging ballast pumps 22 with proper quantity and capacity, arranging ballast piping 26 and arranging corresponding ballast control systems in the pump compartment, as shown in figure 3. The barge ballast pump has larger discharge capacity, more ballast tanks and larger ballast water amount which can be loaded and allocated, can meet the requirements of floating state adjustment and stability when a crane ship lifts and loads goods by quickly and effectively allocating the ballast water on one hand, and can improve the weight of the ship by loading the ballast water on the other hand, so that the ship body overcomes the self buoyancy to sink to the bottom and timely adjusts the pressure of the ship body to the ground when the ship body operates on the bottom based on the environment condition of an operation site, thereby meeting the requirements of anti-overturning and anti-sliding during the lifting operation of the bottom under the severe sea condition.

4) Additionally provided with bow building and deck chamber

A bow building 27, a deck chamber 28, a chimney 29, a fan chamber 30 and the like are added above the head main deck, the original unmanned barge is transformed into a project barge for people to live, and the requirements of a certain number of personnel are met, as shown in figures 2 and 6. The bow building and the deck room are internally provided with crew cabins, kitchens, restaurants, food stores, gymnasiums, dressing rooms, air conditioners, emergency generator rooms, CO according to the requirements of ship users₂Living and working cabins such as rooms, laundry rooms, meeting rooms, medical rooms, cabs and the like.

5) Additionally provided with main crane

The tail part is provided with a main crane 31 which is in a full-rotation type and can rotate 360 degrees around a crane base, and the crane base is reinforced through longitudinal and transverse bulkheads and a strong frame in the ship body, so that enough strength and rigidity are ensured; both the crane jib shelf 32 and the hook box 33 are arranged on the working deck, and both the crane jib shelf and the hook box lower deck structure are suitably reinforced, as shown in fig. 2 and 6.

6) Add set position anchor system

4 positioning anchors 34 are respectively arranged at the tail part of a main deck and a bow deck of the ship, the left side and the right side are symmetrically arranged, 8 winches 35 are correspondingly configured to form an 8-point positioning anchor system, and therefore positioning and ship moving operation of the lifting barge is achieved, wherein the positioning anchor 1 at the head part is also used as a navigation anchor, and the ship positioning anchor system is shown in fig. 6 and 7. The anchor winch can adopt an electric frequency conversion control mode and can be controlled in a cab.

7) Additionally arranging other outfitting equipment

A certain number of polyurethane cushion strips 36 are additionally arranged below the ship bottom protecting bottom plate 9 and in the longitudinal direction corresponding to the position of the double-layer bottom truss material, as shown in figure 4, so that bottom collision is prevented during bottom sitting operation, the friction coefficient of the bottom is increased, the anti-sliding capacity during bottom sitting is increased, and according to the seabed bottom quality condition and the sea condition of a bottom sitting operation area, the polyurethane cushion strips 36 can be properly encrypted in the transverse direction in a local area of the ship bottom, so that the local area is protected in a key way; fender materials 37 are additionally arranged on two sides of the hull, wood planking is paved in the operation deck area, and a detachable breakwater 38 with the height of 2-3 m is additionally arranged on the side to ensure the safety of deck operators in the process of bottom sitting operation under severe sea conditions, and lifesaving equipment such as a lifesaving boat 39 and the like are arranged on two sides of the main deck, as shown in fig. 2 and 6; the towing rigging of the original barge is eliminated, and 2 sets of towing rigging 40 are respectively arranged at the bow and the tail of the barge according to towing requirements, so that the towing operation of the hoisting barge is facilitated, as shown in fig. 7.

Unmanned barge and pedestal crane ship are obviously different in design purpose, overall arrangement, overall performance, structural style and equipment system configuration, but the hull, cabin and the like of large unmanned barge can be fully utilized. The invention provides a method for transforming an unmanned barge into a bottom-sitting type full-rotation crane ship, which has the advantages of less investment, short construction period and small influence on the whole engineering progress compared with a newly-built crane ship, and simultaneously provides a new idea and a new way for the transformation of a large unmanned barge. The bottom-sitting type full-rotation hoisting barge provided by the invention not only can meet the operation requirements of different hoisting weights and different hoisting heights of offshore floating hoisting operation, but also can meet the bottom-sitting hoisting operation requirements of special engineering projects such as marine accident rescue and salvage of stranded accident ships in shallow water reef areas, wind power equipment installation in coastal shoal water areas and the like, has wide engineering application range, and has great industrial utilization value and economic benefit.

Claims

1. A transformation method based on unmanned barge, which is characterized in that a transformation area of the unmanned barge comprises a main deck area and a parallel middle body cargo hold area, and comprises the following steps:

cutting off a partial section (4) of a parallel middle body cargo hold area of the unmanned cargo barge, splicing a front section and a rear section of the unmanned cargo barge after the partial section (4) of the parallel middle body cargo hold area is cut off by welding to form a main hull (5) of the bottom-sitting type lifting barge, and taking a reinforcement measure for a local part of the main hull (5) of the bottom-sitting type lifting barge;

a cabin (13), a pump cabin (14), a ballast tank (24), a ballast system and an oil-water tank are additionally arranged below the main deck;

a main crane (31) is arranged at the tail part above the main deck, and a chimney (29), a bow (27) and a deck chamber (28) are additionally arranged at the head part;

a positioning anchor system and outfitting equipment are additionally arranged;

the reinforcement measures comprise at least one of the following measures:

a middle longitudinal bulkhead (6) and lateral longitudinal bulkheads (7) at two sides thereof are additionally arranged below the main deck;

the arrangement density and the number of the side truss materials (8) are doubled in the double-layer bottom of the unmanned barge, and meanwhile, steel protecting bottom plates (9) are arranged at the bottom and the bilge part of the ship;

the number and the arrangement density of reinforcing ribs on the watertight bulkhead of the cargo hold of the unmanned cargo barge are increased, the watertight transverse bulkhead is additionally arranged at the middle position of each cargo hold, and two horizontal trusses (11) are additionally arranged in the side double-shell.

2. A method of rebuilding according to claim 1, wherein the hatch cover (1) of cargo hold of said unmanned barge is eliminated and sealed with steel plate, the plate structure between the steel plate used for sealing and the original cargo hold hatch is strengthened, and the gantry crane and crane rail on the main deck of the unmanned barge are removed.

3. A method of retrofitting as claimed in claim 1, characterized by cutting off a part of the dead bottom at the tail of the main hull (5) of the jack-up barge, close to the base line.

4. A retrofitting method according to claim 1, characterized in that a main generator set is provided in said nacelle (13).

5. A transformation method as claimed in claim 4, characterized in that an auxiliary equipment cabin, an oil separator chamber, a distribution board and a spare part room are arranged above the middle platform of the engine room (13), and a fuel storage cabin, a daily oil cabin, a fuel oil settling cabin and a lubricating oil cabin are arranged in the nearby areas; reinforced cement (20) is additionally arranged in the double-layer bottom below the engine room (13); the part above the double-layer bottom of the engine room (13) and below the figured steel plate is provided with a liquid cabin, and a domestic sewage cabin, an oil residue cabin, a fuel oil overflow cabin, a fuel oil discharge cabin and a cabin bottom water cabin are arranged in the liquid cabin.

6. A retrofitting method according to claim 1, characterized in that a ballast device is arranged in said pump room (14), said ballast device comprising a ballast pump and a ballast water treatment apparatus.

7. A method of conversion as claimed in claim 1, characterised in that the cargo hold, the two side empty and the fore-aft peak of the unmanned barge are converted into ballast tanks (24).

8. The retrofitting method according to claim 7, characterized in that at the bottom of said ballast tank (24) is added a ballast tube tunnel tank (25), inside the ballast tube tunnel tank (25) is arranged ballast piping (26), the ballast piping (26) being controlled by a ballast control system.

9. A transformation method as claimed in claim 1, characterized in that crew accommodations, kitchens, restaurants, food stores, gyms, changing rooms, air-conditioners, emergency generator rooms, CO's are arranged as required in said bow (27) and deckhouse (28)₂Rooms, laundry rooms, conference rooms, medical rooms and cabs.

10. A transformation method according to claim 1, characterized in that the main crane (31) is of the full slewing type and can rotate 360 ° around a crane base, which connects longitudinal and transverse bulkheads, reinforcement frames in the hull, and both crane boom shelves and hook boxes are arranged on the working deck.

11. The retrofitting method according to claim 1, characterized in that the bottom of the main hull (5) of said jack-up barge is additionally provided with polyurethane battens (36); the polyurethane battens (36) are longitudinally additionally arranged below the bottom protecting plate of the ship bottom, and the polyurethane battens (36) are transversely additionally arranged on the part of the ship bottom.

12. The reconstruction method as claimed in claim 1, characterized in that the positioning anchor system comprises four positioning anchors (34) and correspondingly configured positioning winches (35) which are respectively arranged at the tail part of the main deck and the heading deck of the main hull (5) of the bottom-standing jack-up barge to form an eight-point positioning anchor system, and one positioning anchor (34) close to the head part of the main hull (5) of the bottom-standing jack-up barge is also used as a navigation anchor.

13. A retrofitting method according to claim 1, wherein said outfitting comprises:

a lifesaving/rescue boat (39) is arranged on the two side sides of the main deck;

2 sets of towing rigging (40) are respectively arranged at the head part and the tail part of the main hull (5) of the bottom-mounted lifting barge;

and at least one of:

two sides of the main hull (5) of the bottom-mounted lifting barge are additionally provided with fender materials,

-laying a wooden deck in the working deck area of the main hull (5) of the bottom-mounted lifting barge;

and a detachable breakwater plate (38) with the height of 2-3 m is additionally arranged at the side position of a main deck of the main hull (5) of the bottom-seated lifting barge.

14. A bottom-set full slewing jack-up barge retrofitted with the unmanned barge-based retrofitting method of any of claims 1-13.