JP2827536B2 - Sinking method for submerged boxes - 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 submerged box, such as a caisson, on the water floor to construct an underwater structure such as a submarine tunnel.

[0002]

Conventionally, in order to submerge a submerged box in water, a submersible barge (bracing barge),
It has been carried out using working vessels such as pontoons and crane ships. Because these workboats take anchors for fixing,
It occupies a wide area of the water surface, and often requires restriction or change of the route of general ships. In addition, the route may need to be changed many times as the construction progresses.

[0003] Since a submersible work vessel is newly constructed or rented, the cost burden is not small. In addition, it was necessary to set up a survey tower above the submerged box for positioning during submersion.

[0004] That is, the conventional submerging method involves restriction and change of the route of the construction water area, inconveniences people outside of the work, and the change procedure is complicated (especially international routes, liner routes, etc.). There were problems such as the need for equipment such as navigation signs and the cost of patrol boats.

The present invention has been made in view of the above circumstances. Its purpose is to not require a workboat for submergence, no need to build or rent a workboat, occupy a wide area of water, no need to restrict routes or change, and An object of the present invention is to propose a method of submerging a submerged box that can improve stability and reduce construction costs.

[0006]

According to this method of burying a buried box, a trench path for laying a box to be buried by joining and connecting the buried boxes is excavated and formed on the bottom of the water, and rises above the trench path. A sinking platform was set up, the buried body was pulled into the sinking platform, lowered on the trench road, pulled on the trench road,
Alternatively, it is characterized by being drawn to and joined to an existing box.

[0007]

[Function] In this submersion method, the submerged boxes are joined and connected to each other, and the boxes are suspended from a fixed type submersible stand on a trench path for submerging the submersible at the bottom of the water to be submerged. Then, it is moved by using rollers, wheels, etc. on the trench road, drawn to the existing box, joined by hydraulic pressure welding, etc., and settled.

Accordingly, a submersible work vessel is not required.
Since the existing box or the like is used as a reaction point and the box is pulled with a wire or the like, positioning is easy and a survey tower is not required.
Equipment for submersion and simplification of work can be achieved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of this submerging method will be described below in accordance with the order of construction with reference to the drawings.

FIG. 1 and FIG. 2 show that the seabed between the revetments 2 and 2 in which the shaft 1 is built, that is, the seabed to be laid by connecting and connecting a plurality of submerged boxes, to form a foundation 3, A trench path 4 is formed, and a sinking platform 5 standing on the sea surface above the trench path 4 is constructed in front of the shaft 1 on one of the revetments 2, and then connected to the shaft 1 on the opposite side of the sinking platform 5. Body 6-1;
6-2 is in a sunk state.

As shown in FIG. 1 and FIG. 2, the box 6 is joined and connected to the existing boxes 6-1 and 6-2 to sunk the box.
-3 is towed into the sinking gantry 5 equipped with a sinking girder, hung down on the trench path 4, and two wires 7, 7 for towing are attached to both sides of the box. −
A wire 7 is stretched through a pulley 8 attached to the shaft 2 and its tip is taken up by a winch 9 installed near the shaft 1, and the existing box 6-2 is used as a reaction force point to convert the box 6-3 to the box 6-2 side. To attract.

As shown in FIGS. 3, 4 and 5, two rows of rollers 10 are laid on the top end of the foundation 3 and
-3 moves on the roller 10. The direction of movement is controlled by two wires attached to both sides of the box. The distance of movement is confirmed by the wire length and the same underwater position detection sensor as before.

FIG. 6 shows a case where a new box 6- is added to the existing box 6-2.
3 is a situation immediately before the slider 3 is brought close to and brought into contact. Stop winding the wire here, position sensor,
The position is confirmed by the diver, and the pulling jack 11 is pushed out from the box 6-2 side. In FIG. 7, the tip of the jack 11 is connected to the temporary receiving bracket 12 of the box 6-3.
The box 6-3 is lifted by the level jack 13 provided on the end surface of the box 2 so that the level is adjusted to the level of the box 6-2. Then, the box 6-3 is pulled by the pulling jack 11, and the rubber gasket 1
4 and pressurize the two boxes 6-2 and 6-3.

After removing the wires and rollers, adjusting the direction and height of the box in the same manner as in the conventional method, placing the base mortar and filling the side and top with the back-filled box 6-3. Sink. This process is repeated for a new box, and a plurality of buried boxes are laid down.

[0015]

As described above, the present invention has the following effects.

Since a submersible work vessel is not used, there is no need to limit or change the route at the time of submersion.

Since a submersible work vessel is not required, the construction cost can be reduced.

In order to pull and pull the new box to the existing box, it is possible to connect it accurately, and it is economical because a survey tower is not required.

Since all the submersion work can be performed in the submerged trench road, it does not hinder the navigating ship.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a box is lowered on a trench road in a submerging method according to an embodiment.

FIG. 2 is a longitudinal sectional view showing a state in which a box body is lowered onto a trench road in the laying method of the embodiment.

FIG. 3 is a longitudinal sectional view showing a state in which a box is being pulled on a trench road in the laying method of the embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an enlarged cross-sectional view of a roller unit of FIG.

FIG. 6 is a longitudinal sectional view of two box ends in a state immediately before the existing box and the new box come into contact with each other in the submerging method according to the embodiment.

FIG. 7 is a longitudinal sectional view of two box ends in a state where the existing box and the new box are connected by a pulling jack and the levels are aligned by a level jack in the submersion method of the embodiment. To

[Explanation of symbols]

1 ... shaft, 2 ... revetment, 3 ... foundation, 4 ... trench road, 5 ...
Sinking stand, 6: buried box, 7: wire, 8: pulley, 9
... winch, 10 ... roller, 11 ... pulling jack,
12 ... temporary receiving bracket, 13 ... level jack, 14 ...
Com gasket, 15 ... bulk head.

Claims (1)

(57) [Claims] 1. A trench path for laying down a box to be laid and joined by connecting and connecting the buried boxes to the bottom of the water, excavating and forming the same, and providing a sinking stand rising above the trench path. A method of submerging a submerged box, characterized in that it is drawn into a trench, lowered on a trench road, pulled on the trench road, and drawn to and joined to a shaft or an existing box.