JPS603508A - Method and device for sounding in reclaiming and dredging work - Google Patents

Abstract

PURPOSE:To execute exactly a measurement without causing a disturbance of a sound wave by forming a sound wave path using a clean water in the vidinity of the outside of a work area. CONSTITUTION:A running spreader 2 repeats an advance and a retreat on a work ship 1, and also after the advance or the retreat, the work ship 1 itself is shifted in parallel by an operation of a winch mechanism 6 by 5-7m each of a prescribed width of scatter, by which a reclaiming work is executed by performing continuously a plane- like thin layer scatter of a prescribed layer thickness. By keeping pace with the reclaiming work, a clean water placed near the water surface is absorbed and discharged through an underwater pump 8, fed to a sounding cylinder 14 placed as a work depth direction in the vicinity of the outside of a work area through a penstock 11, etc., and the clean water is jetted out as what is called ''jet water'' from a water discharge nozzle 20 attached to the lower end of the sounding cylinder 14. In this way, a fresh water pillar E in the a work depth direction is formed, and a measurement can be executed in a state that there is no disturbance of a transmitting sound wave from a transmitter and receiver 19, and a bottom face reflected sound wave, by utilizing this fresh water pillar E as a sound wave path.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sounding method and a sounding device for measuring depth in reclamation and dredging work of seabeds, lakebeds, riverbeds, etc.

For example, floating spreaders are used to reclaim the seabed, lakebed, etc., and in this reclamation work, measuring the depth of the reclamation is a method that requires automatic control of the amount of soil input, reclamation management, and automatic spreader position control. This is important in carrying out land reclamation.

From this point of view, the depth of reclamation has been measured using ultrasonic oscillations, but it has been impossible to measure immediately after soil is added.

In other words, the reflected waves were disturbed by the turbid water and bubbles caused by the addition of earth and sand, making it impossible to measure them.

Therefore, conventionally, after soil and sand are added, measurement and searching are carried out after the turbid water bubbles have disappeared several hours later.

However, according to this conventional method, it is not possible to secure the depth during the reclamation work, so the accuracy of the reclamation is poor, and it is almost impossible to correct the depth later in the ocean. The necessary construction work could not be done.

The above applies not only to the floating continuous landfill method, but also to all types of landfill work and dredging work.

Therefore, the present invention was devised to solve the problems and inconveniences of the above-mentioned conventional methods, and its first feature is that it can be used for reclamation and dredging of seabeds, lakebeds, riverbeds, etc. In parallel with the dredging work, a sound wave path using a clear water column is created in the water outside the vicinity of the work area in the direction of the work depth, and the sound wave transmission and reception are exchanged within the sound wave path to measure the work depth. be. In addition, the second feature of the present invention is that in reclamation and dredging work of seabeds, lakebeds, riverbeds, etc.
A sounding cylinder with a water discharge nozzle at the lower end is installed near the outside of the work tool of the dredging work equipment in the direction of the working depth.
A sonic wave transmitter/receiver is built in the sounding tube, and a clean water sending means for sending clean water to the water discharge nozzle via the sounding tube is installed in communication with the sounding tube, and the sonic wave receiver and The point is that it is linked to the depth sounding controller on the work equipment side.

Hereinafter, one embodiment of the present invention will be described in detail as a continuous landfill method using a floating spreader.

Figures 1 and 2 show a plan view and a side view of the equipment, respectively. In each of these figures, (i) l-1:
It is a one-meter boat that is suspended on the water surface of the sea, lake, river, etc.
The movable circle 5 can be fixed freely by the anchor winch mechanism (6).

(2) is a running spreader, which, as shown in FIG. 1, is capable of reciprocating movement on the barge (1) in the direction of the ship's length as indicated by the symbol A, and is also freely pivotable as indicated by the symbol A.

The traveling spreader (2) is equipped with a spreading conveyor (3) and an elevating boom (7) equipped with a working tool (5), which is indicated by a soil spreader, so that the soil, etc. transported via the tripper conveyor (4) is It is possible to reclaim the bottom (B) of the seabed, lake bed, river bed, etc. via a downwardly expanding work tool (5) provided below the delivery end of the spread conveyor (3).

Referring to FIGS. 3 and 4, sounding devices (0) are provided at the tip of the boom (7) on both sides of the working tool (5).

That is, a sliding guide cylinder αG is attached to the tip of the boom (7) in an inclined position expanding downward, and a sounding cylinder α is slidably fitted into each of the guide cylinders αG.

Each of the sounding tubes αψ is provided with 6 water discharge nozzles (A) at the lower end, and an ultrasonic transducer 09 is installed in the sounding tube αa above the nozzle head as shown in FIGS. 5 and 6. It is built in through the support pipe (A) shown.

A wave transmitting/receiving cable 01) is inserted into the support pipe (A), and a sounding controller, a recorder, and a wave transmitting/receiving device 09 installed on a spreader (2) (not shown) are linked by a cable ←η.

A tower (2) is erected at the tip of the boom (7), and the electric winch αD on the boom (7) and the support pipe (A) are connected via a sheave (to) with a wire (17A). By doing so, the sounding cylinder αΦ can be freely raised and lowered toward the working machine side, that is, the spreader (2) side, in the vicinity of both outer sides of the working tool (5).

Clean water can be sent to the water discharge nozzle (A), and the clean water sending means (2) has a water conduit pipe attached to the lower surface of the boom (7) via a metal fitting (C), A flexible tube O2 supported via an arm (9) is connected to one end of the water conduit αD, and a submersible pump (8) is attached to the end of the tube.

The other end of the water conduit αD is connected to No. 4A at the tip of the boom (7).
7 As shown in the figure, it has a single-shaped branch part (11A), and both ends of the branch part (11A) and the middle of the left and right sounding tubes α are communicated by a flexible tube 03 having a rotary joint 09.

The submersible pump (8) can be operated in the direction of the arrow in FIG. 3 via the electric winch 0Q and the wire (10A), so that the submersible pump (8) can be thrown onto the water surface.

The operation of the above configuration will be explained, and the procedure for sounding in parallel with the reclamation work will be explained.

In the floating spreader of this example, the spreader (2) runs on a barge (1), and the earth and sand carried from the tripper conveyor (4) on the barge (1) is transported to the spreader (3) by the spreader conveyor (3). (2), spread the soil using a work tool (5) indicated by a soil spreader to spread the soil to a width of 5 to 7 m, and spread the soil to a layer thickness of 0.5 to 1.0 meters on the seabed surface.
It is effective to continuously apply a thin layer of 500 m.

Therefore, the traveling spreader (2) moves forward on the barge (1),
Spreading predetermined width 5 while repeating retreat and after moving forward or retreating
By shifting the barge (1) itself in parallel by ~7m by operating the winch mechanism (6), the reclamation work is carried out by continuously distributing a thin planar layer of a predetermined thickness. .

Therefore, in reclamation work, it is important to measure the depth from the viewpoint of controlling the amount of earth and sand supplied, and in this case, oscillating and returning sound waves is used.

By the way, in the working area, the earth and sand thrown in through the work tool (5) generates turbid water due to the fine particles in the earth and sand, and air bubbles mixed in the earth and sand, and the transmission and reception of sound waves are disturbed and the sound waves reach the seabed surface. Accurate sounding becomes difficult.

Also, according to experiments, the above-mentioned disturbance is eliminated and the distance that can be measured is 1 on the front side in the direction of travel of the traveling spreader (2).
Although it would be possible to transmit sound waves at a distance of 0 to 15 m or more, or 15 to 20 m or more on the rear side from the earth and sand dumping point, this method would be extremely large and heavy due to its mechanism.
It is difficult, and because it is too far away from the work area, it leads to errors in measuring the depth of the required area.

In such a case, according to the embodiment of the present invention, clean water near the water surface is pumped by a submersible pump (8) in parallel with the landfill work.
) is sucked and discharged through a water conduit α4, which is placed near the outside of the working area in the working depth direction.
A column of clean water (E) is created in the working depth direction as shown in Fig. 4 by sending clean water to each area and jetting clean water as so-called jet water from the water nozzle installed at the lower end of the sounding tube α. death.

Using this clear water column (E) as a sound wave path, the transducer α
This makes it possible to measure the sound waves emitted from 1 and the sound waves reflected from the bottom surface without any disturbance.

In this embodiment, since each of the sounding tubes α4 can be raised and lowered independently via the electric winch 07), the sheave α mark, etc., the transmission and reception of sound waves are exchanged within the clean water column (E). In this case, it is possible to maintain the optimum distance for the sound waves, and it is also possible to adapt to the water depth, which changes as the reclamation progresses.

Furthermore, the sounding tube α→ is arranged with an inclination that expands downward, which allows the nozzle (A) to be placed at a position on the seabed where it will not be affected by the sediment that has been dispersed into the sea.
etc. can be located.

10 In the above example, the working tool (5) may be a dredging packet or a stone crusher, and the quarrying machine may be a landfill machine in addition to a sprayer. In addition to reclamation work, it can also be applied to dredging work.

In summary, the present invention measures the depth using sound waves in parallel with land reclamation work, etc., by creating a sound wave path using clean water near the outside of the work area, so there is no disturbance of the sound waves and the measurement is accurate. measurements can be made.

Further, according to the device of the present invention, a water discharge nozzle is provided at the bottom end of the sounding tube, and clean water from the clean water supply means is spouted into the nozzle to form a column of clean water in the water. Since a sound wave transducer is provided as a path, and this transducer and measurement controller are linked, for example,
It automatically measures the depth before and after the direction in which earth and sand is being fed, and sends a command to the spreader travel control installation to use the measured value in the forward direction, and automatically calculates the amount of reclaimed material based on the difference between the measured depth before reclamation and the predetermined reclaimed depth. It is also possible to automatically control the traveling speed of the spreader ^11 depending on the amount of soil transported. In addition, the depth measured backward in the direction of travel can be used to confirm the spreading landfill depth at that point in time, and to store it in the first memory location relative to the spreader position coordinates, allowing automatic landfilling to be performed through automatic landfill management and automatic control of the spreader position in all landfill sections. It has advantages such as being able to be carried out.

[Brief explanation of drawings]

The drawings show an example of the present invention, and Fig. 1 is a plan view of the overall outline, Fig. 2 is a side view, Fig. 3 is a side view of the main parts of the sounding device, Fig. 4 is a front view, and Fig. 5 6 is a detailed longitudinal sectional front view of the sounding tube, and FIG. 6 is a side view of the same partial section. (2)...Work equipment (traveling spreader), (5)...
・・Working tools (soil diffuser '1. (14) ・・Sounding tube,
09...Sonic wave transducer. (a)...Nozzle, (Foundation)...Clean water delivery means. Fig. 6 JP-A-Sho GO-3508 (6) $5 Fig.

Claims (1)

[Claims] 1. In the reclamation and dredging work of seabeds, lakebeds, riverbeds, etc.
In parallel with the reclamation and dredging work, a sound wave path using a clear water column is created in the water outside the vicinity of the work area in the direction of the depth of the land, and the transmission and reception of sound waves are exchanged within the sound wave path to increase the depth of the land. A depth sounding method for reclamation and dredging work, which is characterized by measuring. 2. In the reclamation and dredging work of seabeds, lakebeds, riverbeds, etc.
A sounding tube having a water discharge nozzle at the lower end is installed near the outside of the work tool of the reclamation and dredging work machine in a certain depth direction, and a sound wave transducer is built in the sounding tube, and the water discharge nozzle A clean water sending means for sending clean water through the sounding tube is installed in communication with the sounding tube, and the sonic wave receiver and a sounding controller on the work equipment side are linked. A sounding device for reclamation and dredging work featuring: 3. A patent claim characterized in that the working tool is a downwardly expanding sediment diffuser, and a sounding cylinder is attached to the working machine side in an inclined position expanding downwardly to the outside of both sides of the sediment diffuser so as to be able to rise and fall freely. A sounding device for reclamation and dredging work as described in item 2. 4. A submersible pump whose clean water delivery means can freely appear on the surface of the sea, lake, river, etc. in the vicinity of the work area, and a flammable hose that freely connects the submersible pump and the sounding tube; A sounding device for reclamation and dredging work according to claim 2, characterized in that it is comprised of: