JPH0358005B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an underwater rubble leveling method and apparatus that can improve the supporting force of a rubble mound such as rubble thrown and scattered on the water bottom.

[Prior art]

Conventionally, when constructing a breakwater by creating a rubble mound on the water bottom and installing caisson etc. on top of it, when creating the rubble mound, a rubble leveling boat placed a heavy load on top of the rubble that was thrown into the water bottom from an underwater rubble boat. The tops of the rubble stones are leveled by dropping weights, but this method of leveling rubble stones does not level the stones evenly, and there is also a problem that there is a lot of vibration during the work, resulting in poor work efficiency.

[Purpose of the invention]

Therefore, the present invention solves the above-mentioned conventional problems,
It is an object of the present invention to provide an underwater rubble leveling method and an apparatus thereof, which generate less vibration during work, have good work efficiency, and can form a rubble mound with high supporting capacity.

[Structure of the invention]

In the present invention, stones are scattered on the water bottom from a tremie pipe of a rubble leveling boat, and then when the rubble leveling boat moves, a soil removal plate is projected downward, and after leveling the stones to a certain extent with the soil removal plate, the rubble is removed. An underwater rubble leveling method characterized in that a leveling arm weighed down from a leveling boat and a face plate provided at the tip of the leveling arm press the stone with its own weight and rotate the face plate without scattering the stones. , A tremie pipe is installed on the rubble leveling boat, and behind the tremie pipe, a soil removal plate that can move up and down and a leveling arm with its own weight capable of pressing stones are installed and weighed down from the rubble leveling boat. It consists of an underwater rubble leveling device with a rotatable face plate attached to the lower end of the arm.

〔Example〕

An embodiment of the underwater rubble leveling device of the present invention will be described below with reference to the drawings. Figure 1 shows a multi-purpose rubble leveling boat that performs everything from managing the input of rubble to finishing underwater rubble leveling. The rubble is supplied to the hopper 7 from a stone transport ship (not shown), and then transported to the desired location on the water bottom via the conveyor 6 and through the tremie pipe 5 whose lower part can be expanded and contracted up and down. The stones are now being properly distributed as rubble.

On the other hand, this rubble leveling boat is equipped with a winch 8 on the ship, and by winding up a wire 10 whose one end is attached to the bottom of the water with an anchor 9, the rubble leveling boat moves stones. Spray one layer at a time on the bottom of the water, then add two more layers on top.
The lower end of the tremie tube 5 is contracted upward when the stones are stacked in layers.

Next, the turret 1 installed vertically on this rubble leveling boat.
, a leveling arm 2 is weighted down to the bottom of the water via a wire, and a face plate 4 as shown in the enlarged perspective view of FIG. 2 is attached to the lower end of a shaft 11 that passes through the center of this leveling arm 2 is attached.

The earth removal plate 3 is provided on the side of the face plate 4 so as to be movable up and down via a hydraulic cylinder 12.

Furthermore, this face plate 4 can be rotated as shown by arrow R by an electric motor, hydraulic pressure, or other drive means from onboard the rubble leveling boat via a shaft 11. The function of the face plate 4 can be further improved by forming a recess 13 on the lower surface of the face plate 4 as shown in FIG. When the face plate 4 rotates left and right alternately or rotates in one direction, it is tightly engaged with the stones, and a flat rubble mound with high supporting capacity can be created.

That is, in this rubble leveling boat, stones are introduced into the water bottom through the tremie pipe 5 and scattered, and when the ship is moving, the earth removal plate 3 is projected downward to pull the stones horizontally, and the stones are leveled to a certain extent. , and more soil removal plate 3
By rotating and twisting the face plate 4 while applying the weight of the leveling arm 2 onto the stone through the face plate 4 at the lower end of the leveling arm 2 while drawing it upward,
The stones are closely interlocked, and as a result, the density of the stones is increased and sufficient supporting capacity is obtained.

In the above embodiment, the underwater rubble leveling device of the present invention is installed on a multi-purpose rubble leveling boat that performs everything from stone input management to rubble leveling and finishing in one boat, but the underwater rubble leveling device Of course, it is also effective even when only one is mounted on a work boat.

〔Effect of the invention〕

Stones are introduced into the water bottom through the tremie pipe 5 and scattered, and when the ship is moving, the earth removal plate 3 is protruded downward to pull the stones horizontally, leveled to a certain extent, and then the earth removal plate 3 is moved upward. By rotating and twisting the face plate 4 while applying the weight of the leveling arm onto the stones through the face plate 4 at the lower end of the leveling arm 2 in the retracted state, it is possible to not only tightly interlock the stones, but also to First, flatten the soil by removing soil plate 3.
leveling to a certain extent (first stage flattening), and then further leveling with the face plate 4 and finishing the flattening using the weight of the arm (second stage flattening).
By performing flattening in stages, the use of flattening power can be divided into 22 times, and the power can be used in a distributed manner.Since the flattening power does not need to be used all at once, it is possible to save power. Since it is performed in two stages, precise planarization can be achieved. Furthermore, in order to prevent the stones from scattering, the present invention compacts the rubble by simply rotating them while pressing the stones with the leveling arm and face plate, so it is possible to eliminate waste caused by scattering of the rubble. be.

In other words, by rotating the stones while statically pressing them from above, the stones can be effectively and densely inserted into the spaces between the stones, and a flat mound can be quickly formed. This means that stones can be used more effectively without the need for scattering, reducing vibration during rubble leveling work, improving work efficiency, and making it possible to form extremely flat rubble mounds with high support capacity. effective.

[Brief explanation of drawings]

FIG. 1 is a side view of a rubble leveling boat equipped with an underwater rubble leveling device of the present invention, and FIG. 2 is an enlarged perspective view of the face plate of FIG. 1. 1...turret, 2...leveling arm, 3...earth removal plate, 4...face plate, 5...tremie pipe, 9...anchor, 11...shaft.

Claims (1)

[Scope of Claims] 1 Stones are scattered on the water bottom from a tremie pipe of a rubble leveling boat, and then, when the rubble leveling boat moves, a discharge plate is projected downward, and the stones are leveled to a certain extent by the soil discharge plate. , an underwater rubble leveler characterized in that a leveling arm weighed down from a rubble leveling boat and a face plate provided at the end of the leveling arm presses the stone by its own weight and rotates the face plate without scattering the stones. Method. 2 A tremie pipe is installed on the rubble leveling boat, and behind it is installed a soil removal plate that can move up and down and a leveling arm with its own weight capable of pressing stones, which is weighed down from the rubble leveling boat. An underwater rubble leveling device with a rotatable face plate at the lower end of the arm.