JP2010179757A - Floating body structure and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floating body structure and a method of manufacturing the same which can suppress its cost low by manufacturing wide floating body structures using an existing building dock. <P>SOLUTION: The floating body structure has cavities 3L, 3R inside, is made up of a pair of split bodies 2L, 2R of a half-split shape formed by dividing at the boundary of a parting plane S, and can float on water. The split bodies 2L, 2R are fabricated so that the parting plane S in the longitudinal direction is formed at the center in the width direction. Shielding parts 4, which prevent water infiltration into the split bodies 2L, 2R by separating the insides from the outsides of the split bodies 2L, 2R, are provided on each of the split bodies 2L, 2R along the parting plane S. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a floating structure and a manufacturing method thereof, and more particularly to an offshore structure including a large ship and a manufacturing method thereof.

  A ship, which is one of floating structures, is assembled until launch at a dock for building the ship. On the other hand, as a construction method used when building a large structure such as a large ship or repairing a part of a ship that is in service, the structure such as a ship is divided in the longitudinal direction, and each divided portion is divided. A block construction method is known which is taken out as an object for assembly work or repair work (for example, Patent Documents 1, 2, and 3). Another example of applying the block method is a large floating structure called a mega float (for example, Patent Documents 4 and 5).

JP 2004-82883 A Special table 2007-531659 gazette JP 60-146783 A Japanese Patent Laid-Open No. 9-277090 Japanese Patent Laid-Open No. 11-99989

  In the above-mentioned block construction method, pre-assembled blocks can be assembled and assembled, so there is an advantage that the construction period can be shortened. On the other hand, when constructing a floating structure such as a large ship, the existing construction dock The width may not be able to accommodate the floating structure. In recent years, the size of ships and so on has increased, and this problem is particularly serious, but large docks that can build super-large ships are expensive and limited in number. Is associated with a large cost risk because the number of ships built cannot be predicted.

In addition, when the floating structure is divided and formed into a plurality of divided bodies, the space required for the construction work can be reduced, while the cost for transporting it to a large dock by a waterway or a land route is increased. If there are many, assembly work will be time-consuming and it may be difficult to keep manufacturing costs low.
An object of the present invention is to solve the above problems and provide a floating structure and a method for manufacturing the same that can reduce the cost by constructing a wide floating structure using an existing building dock. is there.

  In order to achieve this object, the floating structure of the present invention firstly has a pair of half-divided divided bodies having hollow portions 3C, 3L, 3R inside and dividedly formed with the dividing plane S as a boundary. 2L, 2R is a floating structure that can float in water, and the divided bodies 2L, 2R are formed so that a divided surface S in the length direction is formed at the center in the width direction, Each of the divided bodies 2L and 2R is provided with a shielding portion that prevents water from entering the divided bodies 2L and 2R by separating the inside and the outside of the divided bodies 2L and 2R along the dividing surface S.

  Secondly, the shielding portion is formed so as to be longitudinally cut in the lengthwise direction within the divided bodies 2L and 2R along the dividing surface S.

  3rdly, a shielding part consists of the shielding member 4 of the height which goes above the draft surface M from the bottom part side of the division bodies 2L and 2R, It is characterized by the above-mentioned.

  4thly, the shielding member 4 functions as a reinforcement member of the division bodies 2L and 2R.

  Fifth, the shielding portion is characterized by including a partition wall 7 extending from the bottom of the divided bodies 2L and 2R to the ceiling.

  6thly, the said shielding part is arrange | positioned in the inner side position which does not interfere with the junction part J in case the said division bodies 2L and 2R are joined.

  In addition, the method for manufacturing a floating structure according to the present invention is divided and formed so that a division surface S in the length direction is formed at the center in the width direction of the floating structure 1 having the hollow portions 3C, 3L, and 3R inside. The floating structure 1 is composed of a pair of divided bodies 2L and 2R, and the divided portions 2L and 2R are separated from the inside and the outside of the divided bodies 2L and 2R to prevent water from entering the divided bodies 2L and 2R. After that, the divided bodies 2L and 2R are joined along the divided surface S.

  According to the present invention configured as described above, it is possible to float the divided body whose width is about half that of the floating body structure while ensuring the watertightness of the divided body. A floating structure can be manufactured by manufacturing the body with an existing non-large construction dock and then moving it to the water and transporting it into the large dock, working water area or the like and assembling it. In this way, the existing building dock can be used, and the divided bodies can be transported on the water as they are, so the transportation cost is also low, and the number of divided bodies is also small, so the labor of assembly work is also minimal. There is an effect that a large floating structure can be manufactured at a lower cost than conventional ones. In addition, since the divided bodies are halved and have substantially the same width, there is also an effect that two divided bodies can be manufactured with the same building dock.

  Moreover, since it is not necessary to completely close the open side of the divided body by comprising a shielding member having a height extending from the bottom side of the divided body to the upper side of the draft surface, the inside of the divided body can be further simplified. There is an effect that water tightness can be secured.

  In addition, since the shielding member functions as a reinforcing member for the divided body, there is no need to separately provide a reinforcing member in order to improve the strength, so that the manufacturing cost can be further reduced.

  Furthermore, since the shielding part is composed of a partition wall from the bottom of the divided body to the ceiling, there is an effect that the water tightness inside the divided body can be further improved.

  In addition, since the operation | work which joins divisions becomes easier by arrange | positioning the said shielding part in the inner position which does not interfere with the junction part in the case of joining the said division bodies, the effect that convenience is high. There is.

It is a typical perspective view showing one mode of ship construction. It is a typical front sectional view of the ship at the time of half-hull joining. It is a typical front sectional view of a ship at the time of a half split hull division. It is a typical front sectional view at the time of halving hull joining of a ship concerning other embodiments. It is a typical front sectional view at the time of splitting a half-hull of a ship according to another embodiment. It is a flowchart which shows the procedure of manufacture of the floating body structure to which this invention is applied.

Hereinafter, embodiments of the present invention will be described based on illustrated examples.
FIG. 1 is a schematic perspective view showing an embodiment of ship construction. A ship 1 shown in the figure is one of floating structures, specifically, loading with an overall length L and a width W. It is an oil tanker with a weight of 300,000 tons.

  The ship 1 has a longitudinal direction (longitudinal direction, full length direction) in the front-rear direction, which is the traveling direction, and is a plane extending in the longitudinal direction at the center of the width direction that is orthogonal (crossing) to the longitudinal direction. The ship 1 is divided into left and right parts in the width direction by a straight dividing surface S before and after viewing. The divided left and right half-shaped divided bodies become half-hulls 2L and 2R.

  On the side of the pair of left and right half-hulls 2L, 2R facing each other, joint edges (joint portions) J, J (see FIG. 3) having a shape along the outer shape of the side surface of the ship 1 are formed. By welding the joint edges J and J in contact with each other, the half-hulls 2L and 2R are joined together to form one ship 1. That is, when the pair of joint edges J and J are brought into contact with each other, the split surface S is formed between the two joint edges J and J. Each of the pair of half-hulls 2L and 2R is constructed by a building dock (not shown) having a width (width of W / 2 or more) and a length (length of L or more) that can accommodate the half of the hulls.

  FIG. 2 is a schematic front cross-sectional view of the ship when the half-hull is joined, and FIG. 3 is a schematic front cross-sectional view of the ship when the half-hull is divided. Cavities 3L, 3R, 3C constituting tanks are respectively provided on the left and right sides of the ship 1 and the central part sandwiched between the left and right sides. The central cavity 3C is formed by joining the half-hulls 2L and 2R, and the other cavities 3L and 3R are formed in a pair of upper and lower parts to the corresponding half-hulls 2L and 2R.

  In the vicinity of the joint J in each half-hull 2L, 2R, the half-hull 2L, 2R is separated from the inside and outside of the half-hull 2L, 2R along the dividing plane S when the half-hull 2L, 2R is launched. , 2R is provided with a shielding member (shielding portion) 4 that prevents water from entering from the outside to the inside.

  In the example shown in the figure, the shielding member 4 is formed so as to longitudinally cut the inside of the half-hulls 2L and 2R along the dividing surface S, and also functions as a reinforcing member. Further, the shielding member 4 becomes a bottom-side vertical girder (vertical girder) that protrudes upward from the bottom surface (bottom) side in each half-hull 2L, 2R. On the other hand, from the deck side which is the ceiling surface (ceiling part) side in each of the half-hulls 2L, 2R, a deck-side stringer (column) 6 protrudes downward, and the bottom stringer 4 And the front end surface of the deck-side stringer 6 are abutted with each other at a predetermined interval.

  The vertical girders 4 and 6 are arranged at the inner positions displaced in the half-hulls 2L and 2R with respect to the joint edge J, and the bottom-side vertical girders 4 and 4 that are opposed to each other when the half-hulls 2L and 2R are joined. The deck-side stringers 6 and 6 do not interfere with each other. In addition, the height of the bottom stringer 6 is set so that the upper end of the bottom stringer 4 is higher than the water surface (draft surface) M when the half-hulls 2L and 2R are launched and floated on the water. Has been. Incidentally, in the illustrated example, the upper end of the bottom stringer 4 is positioned above the water surface M by H, and each stringer 4 and 6 is inside the half-hull 2L, 2R by X from the joint edge J. It is arranged in the deep position.

  According to the ship 1 configured as described above, the half-hulls 2L and 2R that are bisected in the ship-width direction with the dividing surface S in the center in the width direction as a boundary are formed. The half-hull 2L, 2R is built with a building dock large enough to accommodate 2R, and after construction, the half-hull 2L with a large dock D (see FIG. 1) that can accommodate both the half-hull 2L, 2R. , 2R can be joined to form a ship 1 having a predetermined width W. Thereby, the large dock D which can accommodate the width W at the time of completion is not occupied for a long time from construction to launch.

  In addition, the vertical girder 4 as a reinforcing member ensures the water tightness inside the half-hulls 2L, 2L (cavities 3C, 3L, 3R) and allows the half-hulls 2L, 2R to float on the water. In addition, it is not necessary to separately provide a member for ensuring the water tightness inside the divided bodies 2L and 2R, and the cost can be kept low.

  Further, by forming a predetermined interval between the upper end surface of the bottom-side stringer 4 and the lower end surface of the deck stringer 6, the insides of the half-hulls 2 </ b> L and 2 </ b> R can be communicated with each other. Even when the ship 1 is divided into left and right parts at the center in the width direction, the cavity 3C can be formed at the center in the width direction of the ship 1.

  Furthermore, since the half-hull 2L, 2R itself is configured to float on the water by the shielding part at the time of manufacture at the construction dock of the half-hull 2L, 2R, the water transportation of the half-hull 2L, 2R Therefore, it is not necessary to apply special processing again. This makes it possible to easily carry out the transfer work to the large dock D as shown in FIG. 1 for joining the half-hulls 2L and 2R together.

Next, a different point from the above-mentioned example is demonstrated about other embodiment of this invention based on FIG.
FIG. 4 is a schematic front sectional view when joining a half-hull of a ship according to another embodiment, and FIG. 5 is a schematic view when the half-hull of a ship according to another embodiment is divided. It is a front sectional view. The ship 1 shown in the figure is an oil tank ship with a load capacity of 100,000 tons. This ship 1 is composed of a pair of left and right half-hulls 2L and 2R that are divided at the dividing plane S as in the case described above, and the hollow part 3C in the center in the width direction is omitted as compared with the aforementioned one. At the same time, one half of the cavity 3L, 3R for the tank is formed in each half of the hulls 2L, 2R.

  In the vicinity of the joint surface J in each half-hull 2L, 2R, the half-hull 2L, 2R is separated from the inside and outside of the half-hull 2L, 2R along the split surface S when the half-hull 2L, 2R is launched. , 2R is provided with a partition wall (shielding portion) 7 that prevents water from entering from the outside to the inside.

  In the illustrated example, the partition wall 7 is formed so as to longitudinally cut the inside of the half-hulls 2L, 2R along the dividing surface S. In addition, the bulkhead 7 is formed in a range from the bottom surface to the ceiling surface in each corresponding half-hull 2L, 2R so as to close the open side of the half-hull 2L, 2R. As a result, water tightness in the half-hulls 2L and 2R (cavities 3L and 3R) is secured, and each of the half-hulls 2L and 2R can be floated on the water. Incidentally, the bulkhead 7 is disposed at the back side position displaced in the half-hulls 2L, 2R by the distance X with respect to the joint edge J, and the bulkheads 7 facing each other at the time of joining the half-hulls 2L, 2R. Is not to interfere.

Next, based on FIG. 6, the manufacturing method of the floating structure to which this invention is applied is demonstrated.
FIG. 6 is a flowchart showing a procedure for manufacturing a floating structure provided with the present invention. When the width of the ship is determined at the design stage (S1), after setting the dividing surface S, an existing building dock that can accommodate the half-hulls 2L and 2R that are divided into left and right parts based on the dividing surface S is provided. Selected (S2), the half-ships 2L, 2R are built at this existing building dock (S3). Incidentally, at the time of construction of the half-hulls 2L and 2R, a shielding part is provided in the vicinity of the split surface S of the half-hull, and any one of the configurations described in FIGS. 2 to 5 is selected as the shielding part. .

  When the construction of the half-hulls 2L and 2R is completed, the half-hulls 2L and 2R are moved to a large dock D that can accommodate the half-hulls 2L and 2R (S4). In this case, the movement may be a sea movement. In this case, the half-ships 2L and 2R are lifted by water injection into the building dock, and the sea movement to the large dock D is performed.

  In the large dock D that can accommodate both the half-hulls 2L and 2R, the half-hulls 2L and 2R are directly joined to each other, and the ship 1 having a width at the time of completion is constructed (S5). . After completion of construction, the ship 1 goes through a launch (S6) and reaches a test run. In the embodiment as described above, it is possible to select and construct an existing construction dock capable of accommodating the half states 2L and 2R for the hull 1 which is a structure divided into the half states 2L and 2R. it can.

2L, 2R half hull (split)
3C, 3L, 3R Cavity (tank)
4 Shielding member (blocking part)
7 Bulkhead 7 (blocking part)
J Joint edge (joint)
M water surface (draft surface)
S Dividing surface

Claims (7)

  It has a hollow portion (3C), (3L), (3R) inside, and is constituted by a pair of half-divided divided bodies (2L), (2R) divided and molded with the dividing surface (S) as a boundary, A floating structure capable of floating in water, wherein the divided bodies (2L) and (2R) are formed so that a divided surface (S) in the length direction is formed at a central portion in the width direction. Prevent inundation of the divided bodies (2L) and (2R) inside the divided bodies (2L) and (2R) by separating the inside and outside of the divided bodies (2L) and (2R) along the dividing surface (S). A floating structure provided with a shielding part.   The floating structure according to claim 1, wherein the shielding part is formed so as to cut vertically in the divided bodies (2L) and (2R) along the dividing surface (S).   The floating structure according to claim 2, wherein the shielding part is composed of a shielding member (4) having a height from the bottom side of the divided bodies (2L), (2R) to the upper side of the draft surface (M).   The floating structure according to claim 3, wherein the shielding member (4) functions as a reinforcing member for the divided bodies (2L) and (2R).   The floating structure according to claim 2, wherein the shielding part is composed of a partition wall (7) extending from the bottom of the divided bodies (2L) and (2R) to the ceiling.   The floating structure according to claim 1, 2, 3, 4, or 5, wherein the shielding portion is disposed at an inner position that does not interfere with the joint (J) when the divided bodies (2L) and (2R) are joined. .   A pair of split parts formed so that a split face (S) in the length direction is formed at the center in the width direction of the floating structure (1) having cavities (3C), (3L), and (3R) inside. The floating body structure (1) is composed of the bodies (2L) and (2R), and the divided bodies (2L) and (2R) are separated from the inside and outside of the divided bodies (2L) and (2R) ( 2L), (2R) The manufacturing method of the floating body structure which forms the shielding part which prevents inundation inside, and then joins said division bodies (2L) and (2R) along a division surface (S).

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