JPS5939012B2 - Caisson manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a caisson on a floating dock.

When a caisson is manufactured on a floating dock, the completed caisson is floated on the sea surface and towed to a predetermined location.

In conventional equipment, the caisson is floated on the sea surface by sinking the entire floating dock after the caisson is completed, or the caisson cannot be manufactured while the floating dock is sinking, resulting in a reduction in manufacturing efficiency.

In addition, since it is necessary to sink or float the floating dock, which has equipment for caisson manufacturing such as a crane, engine room, and fuel oil tank, the equipment for floating and sinking the floating dock becomes large and it takes a long time to float and sink the floating dock. The disadvantage is that it requires

This invention has been made in view of the above circumstances, and an object of the present invention is to provide a caisson manufacturing method that does not require sinking or floating of caisson manufacturing equipment and can efficiently manufacture caissons. purpose.

The caisson manufacturing method according to the present invention includes a caisson manufacturing floating dock equipped with caisson manufacturing equipment, a plurality of carts, and a moving device for the caisson manufacturing equipment, and a caisson manufacturing floating dock that is manufactured separately from the manufacturing floating dock and that is attached to both ends of the manufacturing floating dock. A floating dock for drawing out caissons that can be connected to any of them is floated on the sea surface, and a plurality of carts are sequentially moved toward one end of the floating dock for manufacturing, and caissons are manufactured on these carts. ,
A floating drawer floating dock is connected to one end of the manufacturing floating dock, and the caisson, which has been manufactured at one end of the manufacturing floating dock, is transferred to the drawer floating dock together with the cart by a moving device, and then the drawer floating dock is moved to the drawer floating dock. sink the caisson and pull it out with only the caisson floating on the sea surface, connect the floating dock for withdrawal to the other end of the floating dock for manufacturing, and transfer the empty trolley from the floating dock for withdrawal to the floating dock for manufacturing. It is characterized by:

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

The offshore caisson yard has 1 floating dock for caisson manufacturing,
The floating dock 1 for manufacturing, a floating dock 2 for drawing out a caisson, and a moving device 3 for moving the caisson are provided.

The manufacturing floating dock 1 consists of a hollow pontoon 4 having a rectangular shape when viewed from above, and a pair of hollow side walls 5 integrally formed on both sides of the pontoon 4.
is floated so that its top surface is above the sea level.

The manufacturing floating dock 1 is equipped with caisson manufacturing equipment such as a crane.

A plurality of truck rails 6 are provided on the upper surface of the pontoon 4 extending from one longitudinal end to the other, and a pulley rail 7 is provided on the outside of the rails 6.

Further, the upper surface of the pontoon 4 is divided into seven work stages, ie, a first stage 8a to a seventh stage (final stage) 8g, in the longitudinal direction, and a cart 9 for loading a caisson is arranged on each stage 8a to 8g. ing.

In this specification, the final stage 8g side (the left side in FIGS. 1 and 2) of the manufacturing floating dock 1 is referred to as the front, and the first stage 8a side (the right side in FIGS. 1 and 2) is referred to as the rear. do.

At the front end of the manufacturing floating dock 1, both side walls 5 project horizontally forward, and the lower surface of the front projection 5a is on substantially the same horizontal plane as the upper surface of the pontoon 4.

In addition, at the rear end of the manufacturing floating dock 1, the lower part of both side walls 5 protrudes rearward, and this rear protrusion 5b has a triangular shape when viewed from the side, and its lower surface is almost the same as the upper surface of the pontoon 4. are on the same horizontal plane.

Further, at the rear end of the manufacturing floating dock 1, two rearward projecting members 10 are provided that project horizontally rearward.

This protruding member 10 is provided inside the both side walls 5 and at a position approximately at the same height as the rear protruding portion 5b, and has a trapezoidal shape when viewed from above.

On the upper surface of each of the front and rear sides of the side walls 5, a floating drawer dock retracting winch 11.12 and a floating drawer dock operating winch 13.14 are provided.

The floating dock 2 for drawers is composed of a hollow pontoon 15 having a rectangular shape when viewed from above, and a pair of hollow side walls 16 integrally formed at the inward portions of both ends of the pontoon 15.

The floating dock 2 for drawers is provided with a ballast tank and a pump chamber, and can float above the top surface of the pontoon 15 or above the sea surface, or sink to a predetermined depth below the sea surface.

The width of the pontoon 15 of the floating dock 2 for drawers is approximately equal to the width of the floating dock 1 for manufacturing, and its length is approximately equal to the length of the front protrusion 5a of the side wall of the floating dock 1 for manufacturing.

Further, the mutual spacing between the outer surfaces of both side walls 16 of the floating dock 2 for drawing is smaller than the mutual spacing between the inner surfaces of the side wall front projections 5a of the floating dock 1 for manufacturing.

A plurality of truck rails 17 extending from one end to the other end are provided on the upper surface of the pontoon 15 of the floating dock 2 for drawers, and a pulley rail 18 is provided on the outside of the rails 17.

These truck rails 17 and pulley rails 18 are connected to the truck rails 6 of the manufacturing floating dock 1 when connected to the drawer floating dock 2 or the manufacturing floating dock 1 as described later.
and the pulley rail 7, respectively.

In addition, the front end portions (the first
A vertically elongated recess 19 having a trapezoidal shape when viewed from above is formed in the left end surface in the drawings and FIG.

Positioning members 20 are provided at two opposing positions on the inner surface of each of the side wall front protrusions 5a of the manufacturing floating dock 1, and are vertically elongated and the distance between them gradually increases as they move downward.

In addition, the outer surface of each side wall 16 of the floating dock 2 for drawers is
Positioning members 21 are provided at two positions such that the distance between them gradually increases as you move downward.

These positioning members 20, 21 are arranged to face each other when the drawer floating dock 2 is connected to the manufacturing floating dock 1, as will be described later (see FIG. 8).

Two brackets 22 are provided on the inner surface of each of the side wall front projections 5a of the manufacturing floating dock 1, slightly in front of the rear positioning member 20.

These brackets 22 are arranged at required intervals in the front and back, and the upper surface of each bracket 22 is substantially horizontal.

Furthermore, one bracket 23 is provided on the outer surface of each side wall 16 of the floating dock 2 for drawers, slightly forward of the positioning member 21 on the rear side.

The bottom surface of this bracket 23 is almost horizontal, and when the floating dock 2 for drawers is connected to the floating dock 1 for manufacturing as described later, the two brackets 22 of the floating dock 1 for manufacturing It is located in the middle, and its lower surface is located above the upper surface of the bracket 22 of the manufacturing floating dock 1 in the vertical direction (see FIG. 9).

The moving device 3 is mounted on the left and right pulley rails 7.18, a pair of right and left cart moving winches 24 installed on the upper surface of each side wall 5 of the manufacturing floating tank 1, and the pulley rails 7.18. , and a pair of left and right fixed pulleys 25 fixed to either the front end of the pulley rail 7 of the manufacturing floating dock 1 or the front end of the pulley rail 18 of the pullout floating dock 2, and the pulley rail 7.18. A pair of left and right movable pulleys 26 are movably mounted on the movable pulley 26, a movable side rope 27 is wound around the movable winch 24 and connected to the fixed pulley 25 and the movable pulley 26, and the rear end of the floating manufacturing dock 1 fi wall 5 - winch 12 for pulling in a floating dock for drawers that also serves as a brake installed above
and a braking cable 28 that is wound around the winch 12 and connected to a movable pulley 26.

The movable side rope 27 is hung from the movable winch 24 through several pulleys to the fixed pulley 25.
After reciprocating several times between the plurality of pulleys of the mobile pulley 26 and the plurality of pulleys of the movable pulley 26, the tip thereof is fixed to the frame of the fixed pulley 25.

The brake cable 28 is passed from the brake winch 12 to one pulley of the movable pulley 26 via several pulleys, and its tip is fixed to the rear end of the pontoon 4 of the manufacturing floating dock 1.

The upper surface of the frame 29 of the movable pulley 26 is formed horizontally, and two pin insertion holes 30 are bored therein.

Horizontal protruding plates 31 are provided on both sides of the truck 9, and two pin insertion holes 32 are bored in the protruding plates 31.

The horizontal protruding plate 31 of each truck 9 is arranged above the upper surface of the movable pulley frame 29 so that the movable pulley 26 can pass below the protruding plate 31.

The pin insertion hole 32 of each cart 9 and the pin insertion hole 30 of the movable pulley 26 are arranged to match each other when the movable pulley 26 moves below the horizontal protruding plate 31 (see Fig. 5). , see Figure 6).

The caisson drawer floating dock 2 can be separated from the caisson manufacturing floating dock 1 and towed.

The drawer floating dock 2 is connected at its rear to the front of the manufacturing floating dock 1, and at its front to the rear of the manufacturing floating dock 1.

The operation for connecting the drawer floating dock 2 to the front part of the manufacturing floating dock 1 is as follows.

First, the floating drawer dock 2 is towed near the front end of the manufacturing dock 1, and the upper surface of the rear end of each side wall 16 of the floating drawer dock 2 is moved by the retracting winch 11 arranged on the same side of the floating manufacturing dock 1. and an operating winch 13 located on the opposite side
(See Figure 2).

Then, while controlling the position of the floating dock 2 in the width direction with the operating winch 13, the pulling winch 11
It is pulled in between the side wall front protrusions 5a.

At this time, the floating drawer dock 2 is lowered so that the upper surface of its pontoon 15 is located below the lower surface of the side wall front projection 53.

When the rear end of the pontoon 15 of the floating dock 2 for drawers or the front end of the pontoon 4 of the floating dock 1 for manufacturing is reached, the withdrawal is stopped and the floating dock 2 for drawers is floated (see FIG. 7).

As the floating dock 2 for drawers floats, its positioning member 21 approaches the positioning member 20 of the floating dock 1 for manufacturing, and eventually comes into contact with this positioning member 20 and stops. Directional positioning is also done (see Figure 8).

At this time, since the bracket 23 of the floating dock 2 for drawers is located above the bracket 22 of the floating dock 1 for manufacturing, the wedge 33 is placed between these brackets 22 and 23.
(See FIG. 9) To separate the floating drawer dock 2 from the manufacturing floating dock 1, after removing the wedge 33, the floating drawer dock 2 should be lowered and pulled out forward.

The operation for connecting the drawer floating dock 2 to the rear of the manufacturing floating dock 1 is as follows.

First, as described above, the drawer floating dock 2 is lowered so that the upper surface of the pontoon 15 is located below the lower surface of the rear protruding member 5b of the manufacturing floating dock 1, and its front end is attached to the rear end of the manufacturing floating dock 1. Recess 1 of floating dock 2 for pulling and drawing
The rear protruding member 10 of the manufacturing floating dock 1 is fitted into the manufacturing floating dock 1.

When the front end of the floating dock 2 for drawers reaches the rear end of the floating dock 1 for manufacturing and is positioned in the width direction by the rear protruding member 10, the drawing is stopped and the floating dock 2 for drawers is floated.

Then, when the upper surface of the pontoon 15 of the floating dock 2 for a drawer comes into contact with the rear side wall protrusion 5b, the floating is stopped.

To separate the drawer floating dock 2 from the manufacturing floating dock 1,
What is necessary is to sink the floating dock 2 for a drawer and pull it out to the rear.

The moving device 3 moves the first stages 83 to 83 of the manufacturing floating dock 1.
One truck 9 on any of the sixth stages 8f is moved to the previous (next) stage where there is no truck 9.

Then, by sequentially moving the carts 9 on the sixth stage 8f to the next stage, all the carts 9 on the sixth stage 8f to the first stage 8a are moved to the seventh stage 8g.
~ It can be moved to the second stage 8b.

Further, the moving device 3 can move the cart 9 at the final stage 8g to the floating dock 2 for drawers connected to the front part of the floating dock 1 for manufacturing.

The operation for moving the cart 9 from the sixth stage 8f to the first stage 8a to the seventh stage 8g to the second stage 8b is as follows.

In this case, it is necessary that the cart 9 does not exist on the seventh stage 8g before the movement.

First, the fixed pulley 25 is fixed to the pulley rail 7 at the front of the manufacturing floating dock 1, the movable pulley 26 is moved below the protruding plate 31 of the truck 9 of the sixth stage 8f, and these pin insertion holes 32, Insert the pin 34 into the carriage 9 and the moving pulley 2.
Connect 6.

Movement of the movable pulley 26 before connection is performed by operating the movable winch 24 and the brake winch 12.

Once the trolley 9 is connected, the moving winch 24 winds up the moving cable 27.

At this time, the winch 12 which also serves as a brake pays out the brake cable 28 while appropriately performing a brake operation.

When the cart 9 moves to a predetermined position on the seventh stage 8g, the winding and feeding are stopped and the movable pulley 26 is separated from the cart 9.

Next, by winding the braking cable 28 and letting out the moving cable 27, the moving pulley 26 is moved to the carriage 9 on the fifth stage 8e and connected thereto.

Then, it is moved to the sixth stage 8f in the same manner as above.

Thereafter, in the same manner, the fourth stage 8d to the first stage 8a
5th stage 8e to 2nd stage 8b, respectively.
can be moved to

The operation for moving the cart 9 at the final stage 8g to the floating dock 2 for drawing is as follows.

First, the fixed pulley 25 is moved to the front part of the pulley rail 18 of the floating drawer dock 2 and fixed.

In this case, the movement of the fixed pulley 25 is controlled by the warping drum (
(path shown).

Next, the movable pulley 26 is connected to the cart 9 at the final stage 8g, and the cart 9 is moved onto the floating dock 2 for drawing out by operating the moving winch 24 and the winch 12 which also serves as a brake, as described above.

When the movement of the trolley 9 is completed, the moving pulley 26 is separated and moved onto the manufacturing floating dock 1, and the fixed pulley 25
is moved onto the manufacturing floating dock 1 and fixed to the front part thereof.

The caisson weighs 83~8g for each stage of floating dock 1 for manufacturing.
It is manufactured on a trolley 9 which is placed on a cart 9 and sequentially moved forward.

In the final stage 8g, the manufactured caissons are sequentially transferred to the floating dock 2 for removal.

Therefore, when transporting the caisson, the manufacturing floating dock 1
There is no need to sink the caissons, and the caisson can be manufactured continuously and efficiently on the manufacturing floating dock 1.

The procedure for transporting the completed caisson C is as follows (
(See Figure 10).

Connect the floating dock 2 for drawers to the front part of the floating dock 1 for manufacturing,
The completed caisson C is moved together with the cart 9 onto the floating dock 2 for drawers (see FIG. 10).

When connecting the floating dock 2 for drawers to the floating dock 1 for manufacturing,
Even after the drawer floating dock 2 comes into contact with the side wall front projection 5a, extra buoyancy corresponding to the weight of the truck 9 and the completed caisson C is applied by draining the ballast water.

Due to this buoyant force, the side wall front projection 5a receives an upward force, but since the weight of the manufacturing floating dock 1 is much greater than this buoyant force, the height of the manufacturing floating dock 1 hardly changes.

Also, when transferring to the cart 9 or the floating drawer dock 2, a large downward force is applied to the rear part of the floating drawer dock 2, or as described above, the rear part of the floating drawer dock 2 is moved through the wedge 33. Since it is supported by the side wall front projection 5a, the floating drawer dock 2 does not tilt even at this time.

When the movement of the truck 9 and the caisson C is completed, the wedge 33 is removed and the floating dock 2 for drawing out is slightly lowered (see the opening in FIG. 10).

As described above, since extra buoyancy is applied to the floating drawer dock 2 in advance, the floating drawer dock 2 will not sink just by removing the wedge 33.

The floating dock 2 for drawers is pulled out forward by the boat 35 and towed to a predetermined position (see Fig. 10).

After the floating dock 2 for drawers is towed to a predetermined position, ballast water is injected to make it sink, and the caisson C is floated on the sea surface (see Figure 10).

At this time, the cart 9 also sinks together with the floating drawer dock 2.

The floating dock 2 for drawers is towed again to the floating dock 1 for manufacturing with the trolley 9 on it (see Figure 10).

In the manufacturing floating dock 1, after the cart 9 and the caisson C that were at the final stage 8g are moved to the drawer floating dock 2 and the drawer floating dock 2 is separated, the sixth
The carts 9 located at the stage 8f to the first stage 8a are moved to the seventh stage 8g to the second stage 9b, leaving the first stage 8a vacant.

The floating dock 2 for drawing is connected to the rear of the floating dock 1 for production, and the empty trolley 9 on top of it is moved to the first stage 8a of the floating dock 1 for production, and a new caisson is placed on this trolley 9. Start manufacturing (see Figure 10).

In this embodiment, the floating drawer dock 2 carrying the completed caisson C is separated from the manufacturing floating dock 1, and the caisson C is carried to a predetermined position by towing the floating dock 2 for manufacturing. After moving the caisson C to the floating dock 2, the floating dock 2 may be lowered without being separated from the manufacturing floating dock 1, and only the caisson C floating on the sea surface may be towed.) .

According to this invention, the caisson manufactured on the manufacturing floating dock 1 is transferred to the drawer floating dock 2 and carried out, so when the caisson is carried out, the manufacturing floating dock 1 having equipment for caisson manufacturing is lowered. Caissons can be manufactured continuously and efficiently on the manufacturing floating dock 1.

In addition, when transporting a caisson, it is only necessary to sink and float the drawer floating dock 2 that does not have caisson manufacturing equipment, so when a floating dock that has caisson manufacturing equipment is lowered and floated as in the past. Compared to the above, it is possible to downsize the equipment for floating and sinking the floating dock 2 for a drawer, and it takes only a short time for the floating dock 2 for a drawer to sink and float.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1 and 2 are side views and plan views of an offshore caisson yard, and FIGS. 3 and 4 are enlarged views of lines ■-■ and IV-IV in FIG. Arrow view, Figure 5 is an enlarged view of part A in Figure 2, Figure 6 is Figure 5 V
7 is a plan view when the floating dock for drawers is connected; FIGS. 8 and 9 are enlarged sectional views taken along line I--■ and IX-IX in FIG. 7; and FIG. The figure is a perspective view illustrating the operation when carrying out the completed caisson. 1...Floating dock for caisson manufacturing, 2...
- Floating dock for caisson drawer, 3...Movement device, 9...Dolly, C...Caisson.

Claims (1)

[Claims] 1 A caisson manufacturing floating dock 1 equipped with caisson manufacturing equipment, a plurality of trolleys 9, and its moving device 3, and a floating dock 1 that is made separately from the manufacturing floating dock 1 and that is attached to either end of the manufacturing floating dock 1. A floating dock 2 for caisson drawers that can be connected to the floating dock 2 is floated on the sea surface, and a plurality of trolleys 9
are sequentially moved toward one end of the manufacturing floating dock 1,
Caissons are manufactured on these carts 9, and the floating dock 2 for drawing out is connected to one end of the manufacturing floating dock 1, and the manufactured caisson is transferred to a moving device at one end of the manufacturing floating dock 1. 3, move the floating dock 2 together with the cart 9 to the floating dock 2 for drawing out, sink the floating dock 2 for drawing out, and pull it out with only the caisson floating on the sea surface. A method for manufacturing a caisson, which comprises connecting and transferring an empty cart 9 from a floating dock 2 for drawers to a floating dock 1 for manufacturing.