JP2531782B2 - Method and device for cutting adhesion between pontoon and seabed - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of cutting adhesion between a pontoon and a seabed ground where the ship bottom is attached to the seabed ground, and its mounting.

[Prior Art] When various types of construction are performed on a submarine ground by a barge equipped with a civil engineering machine, in a shallow water area (for example, the coast of Ariake Sea), the barge may reach the seabed at low tide.

[Problems to be Solved by the Invention] In this case, if the seabed is weak and has a large adhesive force with the ship bottom, there is a problem that the barge will not float even when the tide is next, and the ship will sink.

For this reason, the work line must exit the site early when the tide is low, and the work time is limited.

It is an object of the present invention to provide a method and an apparatus for separating the adhesion between a barge set on a soft seabed and the seabed.

[Means for Solving the Problem] According to the present invention, a wire is laid along the ship bottom of a pontoon bottomed on the seabed in a direction orthogonal to the longitudinal direction of the hull, and both ends of the wire are alternately moved. Meanwhile, there is provided a method of cutting adhesion between a pontoon and a seabed, which is characterized by moving from one end to the other in the longitudinal direction of the hull to separate the adhesion of the ship bottom to the seabed ground.

Further, according to the present invention, pulleys provided at both ends of the port side of the barge, winches provided on the port sides, wires wound around the pulleys and winches, and these wires are connected in an orthogonal direction. There is provided an adhesion cutting device for a barge and a seabed ground, which is characterized in that a wire extending along the bottom of the ship is provided.

It is preferable that an air hose is provided along the above-mentioned suspended wire, a plurality of nozzles are provided in the air hose, air is ejected from these nozzles, and the air is used as a release agent to improve the effect of separating adhesion.

[Operation] In the method of attaching and removing the pontoon and the seabed ground configured as described above, and mounting the same, the pontoon bottoms on the soft seabed ground, and the tide is full and the tide reaches the dive position of the ship. When raised, the winches are alternately driven to wind the wire, and the wire hung along the bottom of the ship is moved from one end of the hull to the other end. This moving wire scratches the bottom of the ship to create water lines and separate the adhesion between the bottom and the soft ground. When it is difficult to separate the adhered air, air is ejected from a nozzle of an air hose provided along the wire laid on the bottom of the ship. This ejected air serves as a release agent and separates strong adhesion.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 3, pulleys 3 are provided at both ends on both sides of the deck, for example, on a deck 2 of a work platform 1 for ground improvement work. Further, winches 4 and 4 forming a pair are provided on both sides of the deck 2, and a wire 5 is wound around the pulleys 3 and 3 and the winches 4 and 4.

To these wires 5 and 5, a disconnecting wire 6 which is orthogonally laid along the bottom of the ship is connected. An air hose 8 is attached to the wire 6 along a large number of joint members 7 along the wire 6, and the air hose 8 is provided with a large number of nozzles 9. The air hose 8 is an air compressor provided on the deck 2.
Connected to 10.

When the adhesion between the bottom A of the pontoon 1 and the soft seabed B is cut off, as shown in FIG. 2, when the tide rises and reaches the dashing position C of the pontoon 1, winches 4, 4 and In the illustrated example, the wires 4 and 4 are alternately driven, the wires 5 and 5 are taken up alternately, and both ends of the separating wire 6 are moved alternately, while the wires 6 and 5 are moved from the right end to the left end of the ship bottom. The moving wire 6 breaks the bottom of the ship to form a water channel D, and seawater E enters the water channel D from the right side as shown by an arrow, and the attached ship bottom A and seabed ground B are separated. The separating wire 6 can be reciprocated in the longitudinal direction by a means (not shown) to improve the effect of separating the adhesion.

Further, when the degree of adhesion between the ship bottom A and the seabed B is strong, the air compressor 10 is operated as shown in FIG.
Air is ejected from the nozzle 9 of the air hose 8. Then
The jetted air F serves as a release agent, and the attached ship bottom A and the seabed ground are easily separated.

EFFECT OF THE INVENTION Since the present invention is configured as described above,
It is possible to prevent the ship from floating and sinking by moving the disconnection wires that have been hung along the seabed alternately and scratching the ship bottom to separate the ship bottom and the seabed ground that have been attached with water to separate the seabed ground. .

Therefore, it is possible to increase the working time by eliminating the need to escape the work pontoon before the low tide as in the conventional case when constructing on the soft seabed with a large difference in ebb and flow.

[Brief description of drawings]

FIG. 1 is a side view showing a work pontoon equipped with an apparatus embodying the present invention, and FIGS. 2 and 3 are explanatory side views and plan views. 1 ... Work pontoons, 3 ... Pulleys, 4 ... Winches, 5 ...
Wire, 6 ... Separation wire

Claims (2)

(57) [Claims] 1. A wire is laid along the ship bottom of a pontoon bottomed on the seabed so as to be orthogonal to the longitudinal direction of the hull, and both ends of the wire are alternately moved while one end to the other end in the longitudinal direction of the hull. A method of cutting off the adhesion between the pontoon and the seabed, characterized by separating the adhesion between the ship bottom and the seabed. 2. Pulleys provided at both ends of the port side of the pier, winches provided on the port sides, wires wound around these pulleys and winches, and both wires connected in an orthogonal direction to each other. An adhesion cutting device for a barge and a seabed, which is characterized in that a wire laid along the line is provided.