JP2857644B2 - Submersible construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, when submerging a submerged box, a submerging method in which a submerged box is suspended by a winch from a barge or pontoon floated on the water surface and settled is a "placing barge method" or a "tower pontoon method". There is a construction method called.

As shown in FIG. 9, a conventional barreling barge system includes a twin-barrel type barge 1 in which a pair of barges 2 and 2 called "placing barges" are connected by box-shaped garters 3 and 3, respectively. The towing vessel A to be used is floated on the surface of the water, and is towed to the sinking position while being held between the barges 2 and 2 while being supported. At the squatting point, the horizontal operation wires 4, 4... Are drawn out from the barge 1 in multiple directions, the ends thereof are fixed to the water bottom, and the respective wires 4, 4. The horizontal position of the barge 1 is adjusted by pouring water into the immersion box A and settling out the suspension wires 5, 5... In this method. Is going.

FIG. 10 shows a conventional tower pontoon system.
As shown in the figure, the work towers 6, 6 are set up on the submerged box A so that the upper end protrudes above the horizontal even after the completion of the submersion, and the horizontal operation wires 4, 4,. , And the ends thereof are fixed to the bottom of the water. The winches 7, 7,... For horizontal operation wires for winding and unwinding the wires 4, 4,... Are installed at the upper end portions of the working towers 6, 6. The horizontal position of the submerged box A is adjusted by operating the winches 7, 7,.... On the other hand, pontoons 8, 8 for suspending operation are suspended above the water surface, and suspending wires 5, 5,...
9 to suspend the immersion box A, and settle down by pouring water and paying out the suspending wires 5, 5.

[0005]

In the above-described conventional barge method, the horizontal position of a submerged box suspended under a barge is adjusted by operating a horizontal operation wire. The longer the suspension wire becomes, the longer the movement time of the immersion box following the movement of the barge becomes, and there is a problem that it takes a long time until the sunk of the immersion box stops after the barge movement,
There are also problems such as being easily affected by the tidal current, making fine adjustment difficult.

In the conventional tower pontoon system, a tower that protrudes above the water surface is installed on a buried box, and a horizontal operation wire is mounted on the tower, thereby directly moving the buried box suspended in water horizontally. Because of this, the operation time is short and fine adjustment can be easily performed. However, it is necessary to remove the tower underwater after the completion of the subsidence, which requires much labor and time. In addition, the location of the buried tunnel is usually located in a narrow water area where ships can navigate strongly, and there is a problem that it is necessary to close the channel for a long time until the removal of the tower is completed.

The present invention has been made in view of such a conventional problem, and when laying a submerged structure such as a submerged box, a horizontal position adjusting operation of the structure can be performed quickly and finely easily. Further, it is an object of the present invention to provide a method of submerging a submarine structure in which the closing of the channel can be completed in a short time even when submerging under a ship channel.

[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.
A suspended structure is suspended from a pontoon floated on the water surface via a suspending wire operated by a winch, and the tip of the suspended structure is fixed to the water bottom in a plurality of directions for horizontal operation. In a submerged structure submerging method in which wires are linked and the submerged structure is settled by extending the suspending wire and the horizontal position is adjusted by moving in and out of the horizontal operation wire, the suspension is carried out on the pontoon. A winch for a hanging wire for winding and unwinding a wire, and a winch for a horizontal operation wire for winding and unwinding each of the horizontal operation wires, and the horizontal operation wire derived from the winch for the horizontal operation wire is used for the submerged structure. Fixed to the bottom of the water through a pulley supported by There lines the horizontal position adjustment by winch for horizontal operation while suspended in water at yer, and
The suspension wire is paid out to settle the submerged structure.
At the same time as the sinking speed,
Extend the horizontal operation wire by the same length as the extension
Is to do so.

In addition, the horizontal operation wire led out of the winch for the horizontal operation wire is wound around the moving pulley and turned back, and is led out below the water surface through a fixed pulley to wind the wire for the moving pulley for supporting the moving pulley. A moving pulley operating winch for taking out and feeding operation is provided adjacent to the winch for the hanging wire, and by linking the two winches, the feeding speed of the hanging wire and the horizontal operating wire can be synchronized with a simple structure.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a method using a twin barrel pontoon, a synchronous winch and a moving pulley will be described with reference to FIGS.

In the figure, A indicates a submerged box which is a submerged structure, and 20a, 20b, 20c and 20d indicate first to fourth four pontoons used for towing and submerging the submerged box A. I have. Of each pontoon, a first pontoon 20a, a second pontoon 20b, and a third pontoon 2
0c and the fourth pontoon 20d constitute two catamaran pontoons 21a and 21b, respectively, and the catamaran pontoons 21a and 21b are connected by garters 22 and 23 each comprising a pair of steel frames. Have been.

Both pontoons 20a and 20b and 20c and 20c constituting each of the twin-body pontoons 21a and 21b.
The interval of d is such that the upper part of the buried submerged box A is fenders 24, 2
The length of the buried box A is such that the buried box A can be hugged in each catamaran-type pontoon 21a, 21b while the buried box A is floating.

First to fourth pontoons 20a to 20d
On the top, respectively, the winch for the suspension wire 30, 30, ...
Are mounted, and four hanging wires 31, 31 fed from each of the winches cause a submerged box A to be mounted.
Is suspended.

Each of the suspension wires 31 is led out via a fixed pulley 32 provided on each of the pontoons 20a to 20d and a fixed pulley provided on a suspension reaction force beam 33 bridged between the garters 22 and 23. Is fixed to the upper surface of the submerged box A.

The first to fourth pontoons 20a-2
0d is a winch for horizontal operation wire 35 in the horizontal direction.
a, 35b, 35c, and 35d are mounted, and winches 36a and 36b for horizontal operation wires in the front-rear direction are mounted on the first and third pontoons 20a and 20c. Each winch is used to wind and unwind a horizontal operation wire, which will be described later.

On the other hand, sinkers 37a to 37d are respectively installed before and after on the left and right water bottoms of the submerged box, and front, rear, left and right horizontal operation wires are linked to each sinker.

The right front and right rear sinkers 37a, 37
Right horizontal operation wires 38a and 38c are linked to c, and left horizontal operation wires 38b and 38d are linked to sinkers 37b and 37d at the front left and rear left portions. Also, the sinkers 37a and 37 at the right front and the left front are provided.
The front horizontal operation wire 39a is linked to b, and the 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 from each of the sinkers 37a to 37d through the fixed pulleys 42a to 42d at the square portion on the immersion box A, the fixed pulleys 43a to 43d below each pontoon, and the fixed pulleys of the suspension reaction force beam 33 corresponding to each pontoon. 20a ~
It is arranged so as to reach above 20d.

The wires 39a, 3 for horizontal operation in the front-rear direction
9b is branched into two on the immersion box A, respectively,
Each tip is linked to each of the sinkers 37a to 37d, and the rear end side from the branch position is a fixed pulley 4 at the center of the submerged box A.
5a, 45b and first and third pontoons 20a, 20c
Are arranged so as to reach the first and third pontoons 20a and 20c through fixed pulleys of the suspension reaction force beam 33 corresponding to.

First to fourth pontoons 20a to 20d
Are provided with movable pulley operating winches 47a to 47d for operating the horizontal operating wires in the left-right direction in a direction coaxial with the hanging wire winches 30 and on the first and third pontoons 20a, 20c. Are movable pulley operation winches 48a, 4 for operating the horizontal operation wire in the front-rear direction in parallel with the winches 47a, 47c.
8b is installed. And each of these winches 4
The winches 35a to 35d, 36a, 36 for the respective horizontal operation wires are provided at positions facing the 7a to 47d, 48a, 48b.
b is installed.

Each of the movable pulley operating winches 47a to 47d,
48a and 48b are moving pulley operating wires 49, respectively.
49... Are wound, and the moving pulleys 50 a to 50 wrap each of the wires for horizontal operation around the end of each wire.
50d, 51a, and 51b are connected, and each of the horizontal operation wire winches 35a to 35d, 36a, and 36b.
Each wire drawn out from the moving pulleys 50a-5
0d, 51a, and 51b, respectively, are folded back, and are wrapped around fixed pulleys on each pontoon for approximately 90 °.
The suspension reaction force beam 33 is led out to the respective fixed pulleys.

Each of the pulley operation wires 49 and the suspension wire 3 drawn out from the suspension wire winch 30.
1 are arranged so as to be parallel to each other.

The movable pulley operating winches 47a to 47d on each pontoon are linked with the adjacent suspension wire winch 30. On the first and third pontoons 20a and 20c, the movable pulley operating winches 47a to 47d are provided.
The operation amounts of 48a, 47c and 48b are linked.

Next, the operation of towing the submerged box A using the apparatus arranged as described above will be described.

The submerged box A is floated on the water surface by its own buoyancy, and two catamaran pontoons 21a, 21
b, and as shown in FIG.
Is laid on the immersion box A, and the first to fourth pontoons 20a to 20d are arranged on both sides of the immersion box A. Next, the tip of the suspension wire 31 drawn out from each wire winch 30 is linked to the submerged box A, the winch is wound up, and the structure is suspended. In this state, it is towed to the sinking position.

At the sinking position, as shown in FIG. 5, sinkers 37a to 37d are previously set at positions about 100 m away from the sinking position, and each of the horizontal operation wires 3
The tips of 8a to 38d, 39a, and 39b are respectively linked. Next, winches 35a-3 for each horizontal operation wire
5d, 36a, 36b are operated in the winding direction to stretch the respective wires, and the necessary horizontal operating wire winch is operated in the winding direction, and the other is operated in the unwinding direction, and the sinking box A is operated.
Adjust the position. At this time, the moving pulley operating wire 49 is wound up by the moving pulley operating winches 47a to 47d, 48a, 48b, and the respective moving pulleys 50a to 50d, 51
a, 51b are located on the side remote from the opposing horizontal operation wire winch.

In this state, water is poured into the submerged box A, and the winches 30, 30... For the suspended wires are synchronously operated in the wire feeding direction at a constant speed to settle the submerged box A while maintaining the suspended holding state. . At this time, each of the moving pulley operating winches 47a to 47d, 48a, and 48b interlock with the hanging wire winch 30 to move the moving pulley operating wires 49.
, The horizontal operation wires 38a to 38d,
The submerged box A is settled while 39a and 39b are fed out by the same length as the hanging wire 31.

After the sedimentation has been settled to near the predetermined installation depth in this way, the sedimentation is temporarily stopped, and each horizontal operation winch is wound up and extended to finely adjust the horizontal position. Settles.

In the above-described embodiment, the synchronization of the extension of the suspension wire and the extension of the horizontal operation wire is performed by wrapping the horizontal operation wire around the moving pulley and turning the same. The horizontal operation wire is automatically extended by the same length as the suspension wire when the sinking vessel A descends by mechanically synchronizing through the sinking box A, but for each horizontal operation wire without using a moving pulley The suspending wire and the horizontal operation wire may be simultaneously operated at the same speed by operating the winch in synchronization with the suspending wire winch by electric control or manual control.

In the above-described embodiment, a twin-barrel pontoon is used. Alternatively, a single-barrel pontoon may be used. As shown in FIGS. In this case, the various winches on the first and second pontoons 20a, 20b are placed on the front pontoon 60 by suspending the submerged box A under the lower pontoons 60, 61. 3. Fourth pontoon 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 of FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof will be omitted.

Further, when the structure to be submerged is a submerged box or caisson which is not long, only one pontoon may be used.
The various winches on each pontoon are mounted on one pontoon.

[0032]

As described above, the submerged structure submerging method according to the present invention allows the submerged structure to be suspended from the pontoon floated on the water surface and the horizontal operation performed by the winch on the pontoon. The wire is led out from the pontoon through the pulley supported by the submerged structure,
By fixing the tip to the water bottom and adjusting the horizontal position of the submerged structure by the winch operation on the pontoon in this state, the responsiveness of the horizontal movement of the submerged structure to the winch operation is good, The effect of the tidal current is small and the horizontal position adjustment work can be easily performed in a short time .
At the time of sedimentation, the hanging wire is synchronized with the sedimentation speed.
Repeat the horizontal operation wire by the same length as the ear extension.
To ensure smooth settling with good workability.
Will be

Removal of the working equipment after the completion of the submerging work is mainly performed by removing wires and moving the pontoon. Therefore, the work is performed in a short time and with a small amount of labor. In this case, 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 (a method using a twin-body pontoon).

FIG. 2 is an enlarged plan view of a double-hull type pontoon part according to the first embodiment.

FIG. 3 is a front view of the same.

FIG. 4 is a front view of the above-described buried box towing state.

FIG. 5 is a front view showing a state at the time of starting subsidence according to the embodiment.

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

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. 6;

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 (submerged structure) 20a First pontoon 20b Second pontoon 20c Third pontoon 20d Fourth pontoon 21a, 21b Catamaran pontoon 22, 23 Garter 24 Fender 30 Suspension wire winch 31 Suspension wire 32 Fixed Pulley 33 Suspended reaction force beam 35a-35d Winch for horizontal operation wire 36a, 36b Winch for horizontal operation wire 37a-37b Sinker 38a-38d Horizontal operation wire 39a, 39b Horizontal operation for front and rear direction Wires 42a to 42d Fixed pulley 43a to 43d Fixed pulley 45a, 45b Fixed pulley 47a to 47d Moving pulley operating winch 48a, 48d Moving pulley operating winch 49 Moving pulley operating wire 50a to 50b Moving pulley 51a, 51b Moving pulley 54 Speed machine 60 front pontoons 61 rear pontoons

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsushi Noguchi 2-8-8 Koraku, Bunkyo-ku, Tokyo Within Goyo Construction Co., Ltd. (72) Inventor Tsunayoshi Kosa 2-2-2, Koraku, Bunkyo-ku, Tokyo Goyo Construction Co., Ltd. (72) Inventor Makoto Shimoishi 2-82-8 Koraku, Bunkyo-ku, Tokyo Goyo Construction Co., Ltd. (72) Inventor Junichi Miyakawa 5 Yonbancho, Chiyoda-ku, Tokyo Toa Construction Industry Co., Ltd. In-house (72) Inventor Shujiro Eda 2-6-1-3, Hitotsubashi, Chiyoda-ku, Tokyo Inside Toyo Construction Co., Ltd. (72) Inventor Yoshiki Hotta 2-23-18, Shimomeguro 2-chome, Meguro-ku, Tokyo Wakatsuki Construction (56) References JP-A-1-256628 (JP, A) JP-A-1-290822 (JP, A) JP-A 8-319622 (JP, A) (58) Fields surveyed (Int. Cl. ⁶ , DB name) E02D 23/02

Claims (2)

(57) [Claims] 1. A plurality of pontoons suspended on a pontoon floated on the water surface via a suspending wire operated by a winch, the tips of which are fixed to the bottom of the water with respect to the laid objects. The submerged structure submersion method of linking horizontal operation wires in different directions to lower the submerged structure by feeding out the suspension wires and adjusting the horizontal position by operation of the horizontal operation wires. On the above, a hanging wire winch for winding and unwinding the hanging wire, and a horizontal operation wire winch for winding and unwinding each of the horizontal operation wires are mounted, and a horizontal operation wire derived from the horizontal operation wire winch is mounted. Fixing to the water floor through a pulley supported by the submerged structure, Row have the horizontal position adjustment by the horizontal operation winch operation in hanging wire the creature in a state of suspended in water and the suspension wa
When the ear is extended to settle the submerged structure,
Automatically or manually synchronized with the settling speed of the
Move the horizontal operation wire by the same length as the wire
A method of submerging underwater structures, characterized by being extended . 2. The device according to claim 1, wherein the device is derived from a winch for a horizontal operation wire.
When the folded horizontal operation wire is wrapped around the moving pulley and turned back,
Both are led out below the water surface via fixed pulleys,
Winding the pulley wire to support the car and feeding it out
To make a moving pulley operation winch for hanging wire winch
And the two winches are linked to each other.
Synchronizes the lifting speed of the hanging wire and the horizontal operation wire
The method for submerging a submarine structure according to claim 1.