JPH0730558B2 - Underwater rubble throwing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for throwing rubble stones into a water bottom, and more particularly to an underwater rubble stone throwing apparatus suitable for finishing throwing stones.

[0002]

2. Description of the Related Art The construction of a rubble mound that forms the basis of breakwaters and revetments is generally performed by dumping a large amount of rubble from the sea to create a primary mound, and then throwing further rubble stones on it.
The top surface is made flat. by the way,
As a method of finishing the rubble mound flat, there is a method of evenly throwing rubble stones so as to fill the ups and downs of the primary mound. There is disclosed a device which is attached and supplies rubble stones to the hopper through a chute attached to the ladder so as to level the rubble stones at the exit edge while swinging the hopper at a constant height.

[0003]

However, according to the device disclosed in the above publication, since the rudder oscillates (moves up and down) under the influence of waves, the hopper can be maintained at a constant height. It became difficult and the leveling accuracy deteriorated especially in the sea area where the wave height was large, and there was no choice but to abandon its application.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide an underwater rubble throwing device capable of leveling and throwing rubble stones with high accuracy without being affected by waves.

[0005]

In order to achieve the above-mentioned object, the present invention comprises a chute base in which a plurality of chutes are formed in a grid pattern, and extendable legs are provided at the lower part of the chute base. It is characterized in that a plurality of linear bodies are extended from the upper part of the chute base so as to follow the contours of the chutes, and each of the linear bodies is connected to a floating body having a marker.

[0006]

In the underwater rubble throwing device configured as described above, the rubble is thrown through the chute base without being affected by waves by expanding and contracting the legs to land the chute base horizontally on the bottom of the water. it can. Also,
By selectively throwing rubble stones into each chute with the floating body as a guide, the rubble stones can be evenly thrown in so as to fill the ups and downs of the water bottom.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a chute mount, which is provided with a plurality of chutes 2 partitioned and formed in a lattice pattern. Each chute 2 serves as a guideway for the rubble 20 to be thrown into the sea bottom, which will be described later, and includes a pair of receiving portions 3 and 4 arranged above and below the chute base 1 and the pair of receiving portions 3
And a guide section 5 for connecting between 4 and 4. The receiving portions 3 and 4 are formed of a steel plate in a truncated quadrangular pyramid shape, and are arranged such that the inner surfaces thereof face upward and the chutes 2 are in contact with each other. On the other hand, the guide portion 5 is composed of a plurality of chains 6 bridged between the lower end of the upper tray 3 and the upper end of the lower tray 4. The chains 6 are arranged at a predetermined pitch along the edges of the upper and lower trays 3 and 4,
As a result, the guide portion 5 has a structure with many gaps. The chute mount 1 has a height H = 6.
The size of each chute 2 is 5 M, the width W is 9 m, and the length L is 12 m. Each chute 2 has a maximum opening area Ma = 3 m square and a minimum opening area Mb = 1.5 m square. .

Here, the chains 6 are connected to each other by a reinforcing chain 6a arranged in the middle of the guide portion 5 in the longitudinal direction so as to maintain a mutual interval. Also,
The circumference of the chute mount 1 is covered with a side plate 7 having a plurality of windows 7a corresponding to the guide parts 5, so that water can freely enter and leave the chute mount 1 through the windows 7a and the guide parts 5. Therefore, the chute mount 1 is not so affected by the tidal current. Further, one end of a wire rope 9 is attached to the upper part of the chute base 1 via a locking tool 8, and the chute base 1 hooks the wire rope 9 from a crane ship 21 (FIG. 5) described later. It can be lifted by the crane ship.

Numeral 10 is a leg which is attached to the lower four corners of the chute base 1 via brackets 11. This leg 10
It is composed of a hydraulic cylinder, and by expanding and contracting the rod 10a thereof, it plays a role of horizontally landing the chute mount 1 on a primary mound 20a described later. In addition, from the upper part of the chute base 1, a plurality of guide chains (linear bodies)
Has been extended. Each guide chain 13 has a chute 2
One end is fastened to the four corners of the receiving portion 3 constituting the above, and the other end is connected to the floating body 14 having the mark 15. Each guide chain 13 is extended upward by the floating body 14 in a state where the chute body 1 is landed on the primary mound 20a,
At this time, the signs 15 project above the water surface,
Thus, the contour of the chute 2 can be specified. The plurality of guide chains 13 are connected to each other by a reinforcing chain 13a so as to maintain the mutual intervals.

Reference numeral 16 denotes an acoustic sounding machine arranged at the lower portion of the chute body 1, and a plurality of acoustic sounding machines are attached to a traveling body 18 traveling along a pair of rails 17 projecting on both sides of the lower surface of the chute body 1 at a predetermined pitch. Has been. This acoustic sounding machine 16 is for detecting the unevenness of the rubble 20 thrown on the primary mound 20a, and the signal thereof is sent to a display device (not shown) on the stoning bucket ship 25 (FIG. 5) described later. The depth measurement result is displayed on the display device. Numeral 19 is a buoyancy tank provided in each pair on two opposite side surfaces of the chute body 1, and air is supplied to each buoyancy tank 19 from the stone throwing bucket ship 25 as needed.

Hereinafter, the operation of the underwater rubble throwing device configured as described above will be described with reference to FIG.

This underwater rubble throwing device is for throwing the rubble 20 evenly onto a preformed primary mound 20a so as to be flat. The hook 22 of a crane 23 mounted on a crane ship 21 is connected to the wire rope 9 by the wire rope 9. (FIG. 1) is hung and held, and carried into a predetermined position on the primary mound 20a. Near this position, a stone throwing bucket ship 25 carrying rubble is moored, and a cable 26 extending from the stone throwing bucket ship 25 is connected to the chute mount 1. The cable 26 is provided with hydraulic piping for supplying / discharging pressure oil for expanding / contracting the leg 10, wiring for supplying electric power for driving the traveling body 18 holding the acoustic sounding machine 16, and air for supplying to the buoyancy tank 19. Air pipes etc. to be fed are integrated.

Next, the crane 23 of the crane ship 21 is operated to sink the chute platform 1 and the legs 10 of the chute platform 1 are set to the primary mound.
Land on 20a. At this time, the rod 10a of the leg (hydraulic cylinder) 10 is expanded / contracted to horizontally install the chute mount 1. By the installation of the chute mount 1, each guide chain 13 is extended upward by the floating body 14, and the sign 15 projects above the water surface. Therefore, by operating the rocking arm 27 of the stone throwing bucket ship 25 and the bucket 28 supported by this,
A rubble stone 20 is thrown into these signs 15 as a guide. This rubble 20
Falls on the receiving part 3 on the upper side of the predetermined chute 2 in the chute mount 1, and from there, the guide part 5 surrounded by the chain 6
And falls on the receiving portion 3 on the lower side, further falls on the primary mound 20a, and is deposited in a predetermined range corresponding to the chute 2.

By uniformly throwing the rubble stones 20 into each chute 2, a secondary mound 20b as a finishing mound is laminated on the primary mound 20a.
At this stage, the dumping of rubble stones is temporarily stopped, the traveling body 18 is caused to travel from one side of the chute mount 1 to the other side, and the acoustic sounding machine 16
To measure the height of the secondary mound 20b. The signal of the acoustic sounder 16 is sent to a display device (not shown) on the stone bucket ship 25, and the display device displays the height distribution of the secondary mound 20b in the range corresponding to the bottom area of the chute mount 1 as a drawing. Or displayed numerically. The operator calculates the correction amount based on the displayed contents, selects the chute 2 having a shortage of the stone amount, and throws the rubble stone 20 again using the marker 15 corresponding to the shot as a guide. As a result, the secondary mound 20b having a flat upper surface is formed. After that, air is supplied to the buoyancy tank 19, and the chute base 1 is lifted by the operation of the crane 23 of the crane ship 21 and moved to the next loading position,
Thereafter, the above operation is repeated to expand the secondary mound 20b.

In the above embodiment, the guide portion 5 of the chute 2 is constituted by the chain 6, but the guide portion is
Instead of the chain, a wire, a bar or the like may be used as well as a plate.
Further, as the guide chain (linear body) 13, a wire, a bar or the like can be used instead of the chain. further,
A flag or a colored stick for specifying the chute 2 may be used as the sign 15, and in this case, the rubble can be thrown in more smoothly.

[0017]

As described above in detail, according to the underwater rubble throwing apparatus according to the present invention, rubble stones can be thrown in uniformly without being affected by waves, and the leveling accuracy is remarkably high. The effect of improvement is obtained.

[Brief description of drawings]

FIG. 1 is a front view showing a structure of an underwater rubble throwing apparatus according to the present invention.

FIG. 2 is a plan view showing the structure of the device.

FIG. 3 is a side view showing the structure of the device.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a schematic diagram showing a usage mode of the present apparatus.

[Explanation of symbols]

 1 chute stand 2 chute 10 legs 13 guide chain (linear body) 14 floating body 15 sign 20 rubble 20a primary mound 20b secondary mound

Claims (1)

[Claims] 1. A chute base having a plurality of chutes defined in a grid pattern is provided, and extendable legs are provided at a lower portion of the chute base, and the chute base is arranged along an outline of each chute from an upper portion of the chute base. A plurality of linear bodies are extended by, and each of the linear bodies is connected to a floating body having a marker.