JPH09144018A - Settlement method of underwater structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to quickly and accurately adjust a horizontal position when an immersed tube is settled. SOLUTION: A settled structure A is suspended to pontoons 20a-20d floated on the surface of the water through hanging wires 31 controlled by winches and, at the same time, horizontal controlling wires 38a-38d, 39a and 39b fixing their ends to the bottom of the water are interlocked with the settled structure A in the plural directions. Hanging wire winches 30 for winding and drawing out the hanging wires 31 and horizontal controlling wire winches 35a-35d, 36a and 36b for winding and drawing out the horizontal controlling wires 38a-38d, 39a and 39b are mounted on the pontoons 20a-20d. The horizontal wires 38a-38d, 39a and 39b drawn out from the horizontal controlling wire winches 35a-35d, 36a and 36b are fixed to the bottom of the water through pulleys borne on the settled structure A, and a horizontal position of the settled structure A is adjusted with the control of the horizontal controlling winches in a state to hang down the settled structure A in the water with the hanging wires 31. When the hanging wires 31 are drawn out to settle the settled structure A, the horizontal controlling wires 38a-38d, 39a and 39b are synchronized with the setting velocity of the settled structure A and are drawn out by the same length as that of the hanging wires 31 to be drawn out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laying a submarine structure for setting a large submarine structure such as a caisson or a submerged box for a submerged tunnel at a predetermined position by sinking it from the water surface.

[0002]

2. Description of the Related Art Conventionally, when burying a submerged box, a winching method is used to suspend the submerged box from a barge or pontoon floating on the water surface by a winch. There is a construction method called.

In this conventional bracing barge system, as shown in FIG. 9, a twin-barrel type barge 1 in which a pair of barges 2 and 2 called a bracing barge are connected by box-shaped garters 3 and 3. It is used, and the submerged box A floated above the water surface is towed to the submerged point while being supported so as to be held between the barges 2 and 2. At the sunk position, the horizontal operation wires 4, 4 ... Are drawn out from the barge 1 in multiple directions, the tips are fixed to the bottom of the water, and the wires 4, 4 ... The horizontal position adjustment of the submerged box A is performed and water is poured into the submerged box A, and the hanging wires 5, 5 ... are fed out to settle down. In this method, the horizontal position of the submerged box A is adjusted by the horizontal position adjustment of the barge 1. Is going.

The conventional tower pontoon system is shown in FIG.
As shown in, the work towers 6 and 6 having a height such that the upper end of the submerged box A protrudes from the top even after the completion of the laying are set up, and the horizontal operation wires 4, 4 ... , And the ends are fixed to the bottom of the water, and the winches 7, 7 for horizontal operation wires for winding and unwinding the wires 4, 4 ... are installed at the upper ends of the working towers 6, 6. Adjust the horizontal position of the submerged box A by operating the winches 7, 7 ... On the other hand, the pontoons 8 for suspension operation are floated above the surface of the water, and the suspension wires 5, 5 ...
The submersible box A is hung by 9 ... and suspended by pouring water and feeding the suspension wires 5, 5.

[0005]

The above-mentioned conventional bracing barge system adjusts the horizontal position of the submerged box suspended below the barge by operating the horizontal operation wire, so that the water depth is deep. As the hanging wire becomes longer, the moving time of the submerged box following the movement of the barge becomes longer, and it takes a long time for the submerged box to stop shaking after the barge moves.
In addition, there is a problem that it is easily affected by the tidal current and it is difficult to make fine adjustments.

Further, in the conventional tower pontoon system, a tower protruding above the water surface is installed on the submerged box, and a horizontal operation wire is mounted on the tower so that the submerged box suspended in water is directly moved horizontally. Since it is a thing, the operation time is short and fine adjustment can be easily performed, but it is necessary to remove this tower in the water after the completion of the deposition, which requires a lot of labor and time. In addition, the place where the submerged box tunnel is usually installed is often in a narrow water area where the vessels travel frequently, and there is a problem that it is necessary to close the route for a long time until the tower removal work is completed.

In view of the above-mentioned conventional problems, the present invention makes it possible to quickly adjust the horizontal position of a structure to be laid when burying a structure to be laid, such as a submerged box, and easily perform fine adjustment. Moreover, the purpose of the present invention is to provide a method for submerging a water-bottom structure that requires only a short time to close the channel when the vessel is submerged.

[0008]

SUMMARY OF THE INVENTION The features of the present invention for solving the conventional problems as described above and achieving the intended purpose are as follows.
For horizontal operation in multiple directions by suspending the structure to be submerged on the pontoon floated above the water surface through a suspending wire operated by a winch and fixing the tip to the bottom of the water against the structure to be submerged. In a water-bottom structure declining construction method in which a wire is linked, the structure to be submerged is settled by feeding out the suspension wire, and the horizontal position is adjusted by an operation of moving in and out of the horizontal operation wire, the suspension is performed on the pontoon. A hanging wire winch for winding and unwinding a wire and a horizontal operation wire winch for winding and unwinding each of the horizontal operation wires are mounted, and the horizontal operation wire derived from the horizontal operation wire winch is the structure to be sunk. It is fixed to the bottom of the water through the pulley supported by the In carrying out the horizontal position adjustment by the horizontal operation winch operation while suspended in water at Ja.

When the hanging wire is drawn out to settle the structure to be settled, the horizontal operation wire is drawn out in synchronization with the settling speed by the same length as the drawing of the hanging wire. Sedimentation is performed with good workability.

Further, the horizontal operation wire drawn out from the winch for horizontal operation wire is wound around the moving pulley and folded back, and the wire for the moving pulley for supporting the above-mentioned moving pulley is wound under the surface of the water through the fixed pulley. A winch for operating a movable pulley for taking out and pulling out is provided adjacent to a winch for a hanging wire, and by interlocking both winches, the payout speed of the hanging wire and the horizontal operating wire can be synchronized with a simple structure.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method using a twin-body pontoon, a synchronous winch, and a movable pulley will be described below with reference to FIGS.

In the figure, A indicates a submerged box which is a structure to be submerged, and 20a, 20b, 20c and 20d indicate the first to fourth four pontoons used for towing and submerging the submerged box A. There is. Of each pontoon, a first pontoon 20a, a second pontoon 20b, and a third pontoon 2
0c and the fourth pontoon 20d respectively form two catamaran type pontoons 21a and 21b. The catamaran type pontoons 21a and 21b are connected by garters 22 and 23 made of a pair of steel frames, respectively. Has been done.

Both pontoons 20a and 20b and 20c and 20 constituting the respective twin-body type pontoons 21a and 21b.
The space of d is such that the upper part of the submerged box A that is floated is fenders 24, 2
The length is such that the submersible box A can be entered through the four submersible pontoons 21a and 21b in a state where the submerged box A is levitated.

The first to fourth pontoons 20a to 20d
The winches for suspension wires 30, 30 ...
... is mounted, and the submersible box A is provided by the four suspension wires 31, 31 ...
Is hanging.

Each suspension wire 31 is led out through a fixed pulley 32 installed on each of the pontoons 20a to 20d and a fixed pulley installed on a suspension reaction beam 33 suspended between the garters 22 and 23, and its tip end. Is fixed to the upper surface of the submerged box A.

The first to fourth pontoons 20a to 2 are also provided.
The winch 35 for horizontal operation wire in the left-right direction is on 0d.
a, 35b, 35c, 35d are mounted, and winch 36a, 36b for horizontal operation wire in the front-rear direction is mounted on each of the first and third pontoons 20a, 20c. Then, the respective horizontal operation wires, which will be described later, are wound and unwound by these winches.

On the other hand, front and rear sinkers 37a to 37d are installed in advance on the left and right water bottoms of the submerged box sunk position, and front and rear and left and right horizontal operation wires are linked to the respective sinkers.

Right front and right rear sinkers 37a, 37
The horizontal operation wires 38a and 38c for the right direction are linked to c, and the horizontal operation wires 38b and 38d for the left direction are linked to the sinkers 37b and 37d on the left front and left rear portions. In addition, the right front and left front sinkers 37a, 37
A front horizontal operation wire 39a is linked to b, and a rear horizontal operation wire 39b is linked to the right rear and left rear sinkers 37c and 37d.

Left and right horizontal operation wires 38a-38
d is the sinkers 37a to 37d, respectively, through the fixed pulleys 42a to 42d in the squares on the submerged box A, the fixed pulleys 43a to 43d under the respective pontoons, and the fixed pulleys of the suspension reaction beams 33 corresponding to the respective pontoons. 20a ~
It is arranged so as to reach above 20d.

Front and rear horizontal operation wires 39a, 3
9b, the tip is divided into two on the submerged box A,
The front end of each is linked to each of the sinkers 37a to 37d, and the fixed pulley 4 at the center of the submerged box A is on the rear end side from the branch position.
5a, 45b and first and third pontoons 20a, 20c
It is arranged so as to reach above the first and third pontoons 20a and 20c through the fixed pulley of the suspension reaction beam 33 corresponding to.

First to fourth pontoons 20a to 20d
Are installed coaxially with the hanging wire winch 30 and are equipped with movable pulley operating winches 47a to 47d for operating the horizontal operating wires in the left and right directions, and on the first and third pontoons 20a and 20c. Is a winch 48a, 4 for operating a movable pulley for arranging the winch 47a, 47c and operating a horizontal operation wire in the front-rear direction.
8b is installed. And each of these winches 4
7a to 47d, 48a, and 48b for each horizontal operation wire at positions opposed to 48b.
b is installed.

Winches 47a to 47d for operating the movable pulleys,
48a and 48b are wires 49 for operating the movable pulley,
49 ... is wound, and each of the horizontal operation wires is wound around the end of each wire.
50d, 51a, 51b are connected, and each of the horizontal operation wire winches 35a to 35d, 36a, 36b.
The wires drawn from the moving pulleys 50a-5
It is wrapped around 0d, 51a, 51b and folded back, and wrapped around a fixed pulley on each pontoon to make about 90 °.
The suspension reaction beam 33 is led to each fixed pulley by changing the direction.

In addition, the hanging wire 3 drawn out from each movable pulley operating wire 49 and the hanging wire winch 30.
1 and 1 are arranged so as to be parallel to each other.

The movable pulley operating winches 47a to 47d on each pontoon are interlocked with the adjoining hanging wire winches 30 and, on the first and third pontoons 20a and 20c, the movable pulley operating winches 47a, 47c.
The operation amounts of 48a, 47c and 48b are interlocked.

Next, the towing and digging operation of the submersible box A using the apparatus arranged as described above will be explained.

The submersible box A is floated above the water surface by its own buoyancy, and two catamaran type pontoons 21a, 21 are placed on it.
b to move the garters 22 and 23 as shown in FIG.
On the submerged box A, and the first to fourth pontoons 20a to 20d are arranged on both sides of the submerged box A, respectively. Then, the tip of the suspension wire 31 fed out from each wire winch 30 is linked to the submerged box A, and the winch is rolled up to suspend the structure. In this state, the ship is towed to the sunk position.

At the sunk position, as shown in FIG. 5, the sinkers 37a to 37d are installed in advance at a position about 100 m away from the sunk position, and the horizontal operation wires 3 are attached to them.
The tips of 8a to 38d, 39a, and 39b are linked together. Next, winches 35a-3 for each horizontal operation wire
5d, 36a, 36b are operated in the winding direction to stretch each wire, and the required horizontal operation wire winch is operated in the winding direction, and the other is operated in the unwinding direction to sunk the box A.
Position adjustment. At this time, the movable pulley operating winches 47a to 47d, 48a and 48b are used to wind up the movable pulley operating wire 49 to move the movable pulleys 50a to 50d and 51, respectively.
Position a and 51b away from the opposing horizontal operation wire winch.

In this state, water is poured into the submersible box A, and the winches 30 for hanging wires are synchronously operated in the wire feeding direction at a constant speed to sink the submerged box A while maintaining the suspended state. . At this time, each of the movable pulley operating winches 47a to 47d, 48a, 48b is interlocked with the hanging wire winch 30 to move the movable pulley operating wire 49.
In order to pay out each horizontal operation wire 38a-38d,
The submersible box A is submerged while 39a and 39b are paid out by the same length as the suspension wire 31.

After settling to near the predetermined installation depth in this way, the settling is temporarily stopped, each horizontal operation winch is wound up, and the horizontal position is finely adjusted by the unwinding operation to reach the final installation position. Settle.

In the above-described embodiment, the suspension wire feeding and the synchronization of the horizontal operating wire are synchronized with each other by winding the horizontal operating wire around the moving pulley and folding it back, and the winch for operating the movable pulley and the winch for the hanging wire is reduced. The horizontal operation wire is automatically extended by the same length as the hanging wire when the submersible box A descends by mechanically synchronizing via the horizontal operation wire, but for each horizontal operation wire without using a moving pulley. The winch and the horizontal operation wire may be operated at the same speed at the same time by operating the winch in synchronization with the winch for the suspending wire by electrical control or manual control.

Further, in the above-mentioned embodiment, the twin-body type pontoon is used, but in addition to this, a single-body type pontoon may be used, and as shown in FIGS. The submersible box A is hung below the front pontoons 60 and 61. In this case, the various winches on the above-mentioned first and second pontoons 20a and 20b are placed on the front pontoons 60 and 3, 4th pontoons 20c, 20
The various winches on d are mounted on the rear pontoon 61. 7 and 8, the same parts as those in the embodiment shown in FIGS. 1 to 6 are designated by the same reference numerals and the description thereof will be omitted.

Further, if the structure to be sunk is not long, such as a submerged box or caisson, only one pontoon may be used. In this case, the above-mentioned first to fourth parts are used.
The various winches on each pontoon are used on one pontoon.

[0033]

As described above, according to the method of depositing a submarine structure of the present invention, the structure to be submerged is suspended from the pontoon floated on the water surface, and the horizontal operation is performed by the winch on the pontoon. Pull out the wire from above the pontoon through the pulley supported by the structure to be sunk,
By fixing the tip to the water bottom and adjusting the horizontal position of the structure to be sunk by the winch operation on the pontoon in this state, the response of the horizontal movement of the structure to be sunk to the winch operation is good, The influence of the tidal current is small, and a minute horizontal position adjustment work can be easily performed in a short time.

Further, the removal of the working equipment after the completion of the digging work is mainly done by removing the wires and moving the pontoon, so that the work is carried out in a short time and with a small amount of labor, which is economical and the work on the ship route is also possible. Even in the case of, it is possible to shorten the route closing time.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of an embodiment of the present invention (method using a twin-body type pontoon).

FIG. 2 is an enlarged plan view of the above-mentioned twin-body type pontoon portion.

FIG. 3 is a front view of the same.

FIG. 4 is a front view of the above-mentioned submersible towed state.

FIG. 5 is a front view showing a state at the time of starting the above-mentioned digging.

FIG. 6 is a front view showing a state at the time of completion of the same deposition.

FIG. 7 is a plan view showing a schematic configuration of another embodiment of the present invention.

FIG. 8 is a plan view of the rear pontoon in FIG.

FIG. 9 is a perspective view of an example of a conventional method.

FIG. 10 is a perspective view of another example of the conventional method.

[Explanation of symbols]

A submerged box (structure to be sunk) 20a 1st pontoon 20b 2nd pontoon 20c 3rd pontoon 20d 4th pontoon 21a, 21b Catamaran pontoon 22,23 Garter 24 Fender 30 Suspended wire winch 31 Suspended wire 32 Fixed Pulley 33 Suspended reaction beams 35a-35d Horizontal operation wire winches 36a, 36b Front-rear horizontal operation wire winches 37a-37b Sinkers 38a-38d Horizontal operation wires 39a, 39b Front-rear horizontal operation Wires 42a-42d Fixed pulleys 43a-43d Fixed pulleys 45a, 45b Fixed pulleys 47a-47d Winches 48a, 48d for moving pulley operation Winches 49 for moving pulley operation 50 Wires for operating pulleys 50a-50b Moving pulleys 51a, 51b Moving pulleys 54 Speed machine 60 front pontoons 61 rear pontoons

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Satoshi Noguchi 2-8 Koraku, Bunkyo-ku, Tokyo Within Goyo Construction Co., Ltd. (72) Tsunayoshi Kosa 2-8 Koraku, Bunkyo-ku, Tokyo No. Goyo Construction Co., Ltd. (72) Inventor Makoto Shimoishi 2-8 Koraku, Bunkyo-ku, Tokyo Within Goyo Construction Co., Ltd. (72) Inventor Junichi Miyagawa 5 Tobancho, Chiyoda-ku, Tokyo 5 Toa Construction Industry Co., Ltd. (72) Inventor Shujiro Eda 2-6-3 Hitotsubashi, Chiyoda-ku, Tokyo Toyo Construction Co., Ltd. (72) Inventor Yoshiki Hotta 2-23 Shimomeguro, Meguro-ku, Tokyo No. 18 Wakatsuki Construction Co., Ltd.

Claims (3)

[Claims] 1. A plurality of structures in which a structure to be submerged is suspended from a pontoon floated above the water surface via a suspension wire operated by a winch, and the tip of the structure is fixed to the bottom of the water. Direction horizontal operation wire is linked, and the structure to be submerged is settled by unwinding the suspension wire, and the horizontal position is adjusted by the operation of moving the horizontal operation wire in and out. Above, a winch for a hanging wire that winds and unwinds the hanging wire, and a winch for a horizontal operating wire that winds and unwinds each of the horizontal operating wires, and a horizontal operating wire that is derived from the winch for the horizontal operating wire. The submerged structure is fixed to the bottom of the water through a pulley supported by the submerged structure. Water bottom structure sinking method comprising a feature to make a horizontal position adjustment by the horizontal operation winch operation while at the hanging wire the creation suspended in water. 2. The horizontal operation wire is extended by the same length as the extension of the suspension wire, automatically or manually synchronized with the sedimentation speed when the suspension wire is delivered to sink the structure to be settled. The method of submerging the submarine structure described in. 3. A horizontal operation wire drawn out from a horizontal operation wire winch is wound around a movable pulley and folded back, and a horizontal pulley wire for guiding the movable pulley below the water surface is wound around the fixed pulley to wind the movable pulley wire. The water bottom structure according to claim 1 or 2, further comprising: a winch for operating a movable pulley that is operated for taking out and advancing, adjacent to a winch for a hanging wire, and synchronizing the hoisting wire and the horizontal operation wire payout speed by interlocking the winches. Sinking method.