JPH053615A - Laying method for submarine line - Google Patents

Abstract

PURPOSE:To reduce the laying cost and to control the burying of cables directly according to the conditions of the submarine ground. CONSTITUTION:This invention is characterized by pulling a cable carrying ship 1a with a subaqueous work tractor 10 which can run freely on the submarine ground and has a cable-burying plough 12 fitted through a hydraulic operation arm 11, when the bottom 4 of water is excavated with the subaqueous tractor 10, and a submarine line 7 is drawn out and laid from the cable carrying ship 1a loaded with cable coils 2 through the medium of a control section and a control cable 9. Accordingly, a cable-laying ship of special specifications as before becomes unnecessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of laying a submarine wire.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional example of a method for laying a submarine wire. As shown in the figure, the wire coil (or drum) 2 in the cable tank or cable container of the cable laying ship 1 is laid on the bottom 4 of the water by controlling the capstan or caterpillar 3 and controlling the boat speed. . When burying on the seabed, the cable laying ship 1 pulls the main plow 5 with the index rope 6 to directly bury the cable (seabed line) 7 under the water bottom ground. In the figure, 8 is a water surface, and 9 is a control unit and a control cable.

[0003]

The above-mentioned prior art has the following problems.

(1) Since the cable laying ship has a special specification and a large facility, the laying cost is very high.

(2) When there are irregularities or steps on the bottom of the water, or when there is a reef on the buried route, the buried depth is controlled by monitoring and control from the ship, but the control operation delay time (time lag). Is large and requires very difficult predictive control.

(3) A large detour route is required to detour obstacles.

The present invention has been made in view of the above points, and provides a method for laying a submarine wire which can reduce the laying cost and can directly bury and control the cable according to the situation of the submarine ground. The purpose is that.

[0008]

The above object is to excavate the water bottom with a water bottom working tractor that can travel freely on the seabed and has a wire burial plow box attached via a hydraulically actuated arm. This is achieved by pulling the submarine line from the filament-loaded carrier on the surface of the water on which the coil is mounted via the control unit and the control cable so as to pull the filament-loaded carrier by the underwater working tractor.

[0009]

Since the above-mentioned means is provided, a cable laying ship with special specifications as in the conventional case is not required.

[0010]

EXAMPLES Next, the present invention will be specifically described by way of examples.

[Embodiment 1] FIG. 1 shows an embodiment of the present invention. Note that the same parts as those of the related art are denoted by the same reference numerals, and the description thereof will be omitted. As shown in the figure, the water bottom 4 is excavated by a water bottom working tractor 10 which is freely movable on the seabed and has a line embedding plow box 12 mounted via a hydraulically actuated arm 11. When the submarine wire 7 is drawn from the filament loading carrier 1a on the water surface 8 on which the filament coil 2 is mounted via the control unit and the control cable 9 and laid, the water loading work tractor 10 pulls the filament loading carrier 1a. did. By doing so, it is not necessary to use a cable laying vessel with special specifications as in the past, the laying cost can be reduced, and it is possible to directly bury and control the cable according to the situation of the submarine ground. Can be obtained.

That is, the water bottom work tractor 10, which is a main component, the line-filling plow box 12, the line loading carrier 1a, the control section and the control cable 9 is a water-bottom type caterpillar drive vehicle. At the same time as tearing the ground with the wire-filling plow box 12 while adjusting the burying depth of the plow box 12 with the hydraulically operating arm 11, the operation of filling the cable 7 is performed by passing the plow box 12 through the control section and the control cable 9. Tow it. At this time, in the present embodiment, the linear loading carrier 1a
Although the cable 7 is pulled through the index rope 6, the cable 7 can be driven out by the submarine wire drive caterpillar or the capstan 3 to significantly reduce the laying tension of the cable 7.

As described above, according to this embodiment, the intended purpose can be achieved, and the following effects can be obtained.

(1) An optical cable submarine line is also conceivable as the submarine line. As an optical submarine line, due to demand for detour routes and widening of relay distance, routes that connect the coastal areas of land and islands in a half-loop are conceivable. The method of this embodiment can be used to improve the efficiency and economy of laying this submarine route.

(2) Submarine work Since the line carrier barge is pulled by the tractor, the plow burying work can be easily carried out as a series of work without bypassing the route even on the route where the sandy land and the reef area are mixed.

[0016]

As described above, according to the present invention, the water bottom is excavated by the water bottom working tractor which is free to travel on the seabed ground and has the wire burial plow box attached via the hydraulically actuated arm. When pulling out and laying a submarine wire from a line-carrying barge on the water surface equipped with coils via the control unit and control cable, the line-carrying barge was pulled by a water-bottom work tractor. It is possible to obtain a method of laying a submarine cable that enables a cable laying ship of the specification to be unnecessary, a laying cost can be reduced, and a cable can be directly buried and controlled according to the situation of the submarine ground.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a laying state according to an embodiment of a method for laying a submarine wire of the present invention.

FIG. 2 is an explanatory view showing a laying state by a conventional method of laying a submarine wire.

[Explanation of symbols]

 1a Strand loading carrier 2 Strand coil (or drum) 4 Water bottom 7 Submarine wire (cable) 8 Water surface 9 Control and control cable 10 Bottom working tractor 11 Hydraulic actuating arm 12 Spare box for embedding the wire

Claims (1)

Claim: What is claimed is: 1. A water bottom is excavated by a water bottom working tractor having a spade box for embedding a wire, which is freely movable on the seabed and is attached via a hydraulically actuated arm. A submarine line characterized in that, when a submarine line is drawn out and installed from a mounted line-shaped carrier on a water surface via a control unit and a control cable, the line-shaped carrier is pulled by the submarine work tractor. Laying method.