JP3811550B2 - How to throw in earth and sand - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, when earth and sand, stones, etc. are thrown into the bottom of the water, the state of sedimentation of the earth, sand, stones, etc. at the bottom of the water is predicted in advance by simulation, and the barge to be thrown is moved to an appropriate loading position and thrown in. It is related to the input method of earth and sand and stone.
[0002]
[Prior art]
Conventionally, when constructing a rubble mound on the seabed or when constructing a rubble foundation, the sediments and stones are transported by a barge such as a ship, and the water just above the place where the sediments and stones are to be thrown in. If there is a tidal current or water flow in the sea, the soil or stone that has been thrown into the water is poured into the water and then flowed in the tidal current or water flow. By deviating from the bottom of the water to be thrown in, there is a problem that the earth, sand, stones, etc. to be thrown in are wasted, so that extra earth, sand, stones, etc. are consumed, and the work efficiency of the drop is reduced.
[0003]
However, when sand and stones are thrown in, the correct pouring position is determined in consideration of the tide and water flow, and by putting earth and sand and stones from the barge that has moved to the pouring position, excess sand and stones are consumed. However, at present, the charging method considering the efficiency of the charging operation is not realized yet.
[0004]
[Problems to be solved by the invention]
In the present invention, when earth and sand, stones, etc. are thrown into the bottom of the water, the tide and water flow at the loading position are considered in real time, and the barge where the earth, sand, etc. is thrown is moved to an appropriate position. Is provided to reduce the consumption of waste sand and stones and improve the work efficiency of the sand and stones.
[0005]
[Means for Solving the Problems]
The present invention preliminarily describes the depth of water at the place where earth, sand, stones, etc. are to be thrown in, and the state of sedimentation at the bottom of the water when earth, sand, stones, etc. are not flowing due to the size and shape of the earth, sand, stones, etc. Calculate and predict, place the barge at the loading position, measure the flow at the loading position, calculate how much the thrown earth, sand, stones, etc. will shift, and move the barge by that amount This method consists of a method of throwing earth, sand, stones, etc. at the position, and the present invention grasps the accumulation state of the thrown earth, stone, etc. by acoustic sounding and determines the loading position based on this. In addition, the present invention comprises a method for loading soil, stone, etc. that performs acoustic sounding with a narrow multi-beam device.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the following, an embodiment of the present invention in which earth and sand and stones are thrown in from the sea by applying the earth and sand and stones loading method of the present invention will be described. FIG. In this case, the rubble mound 3 shown in FIG. 1 is created by throwing the earth and sand 1 into the water from the barge 2, which is an earth transport ship for the earth and sand 1 to be thrown in.
[0007]
First, in order to measure the position of the barge 2 shown in FIG. 1, the GPS mobile station 3 of the global positioning system using artificial satellites, the gyrocompass 4 as an azimuth measuring device, and the position information transmission A device 5 is provided so that the position of the barge 2 can be measured by the GPS base station information M from the GPS base station 6 installed on the ground. Reference numeral 7 in FIG. It is a panel.
[0008]
In addition, in order to be able to measure the position of the barge 2, in addition to using the GPS and the gyrocompass 4 as described above, a lightwave range finder and a gyrocompass may be used, or a plurality of lightwave range finders may be used. Any device generally used in the past may be used.
Next, based on the depth of the place where the earth, sand, stone, etc. 1 is to be introduced and the size, shape, etc. of the earth, sand, stone, etc. 1 A simulation is performed to calculate and predict in advance the state of accumulation on the bottom 11 when the water is charged.
[0009]
That is, since the above-mentioned water depth and the size and shape of the earth and sand 1 are known, what kind of accumulation state will be obtained at the bottom 11 when the earth and stone 1 is introduced from the barge 2 at the water depth. However, for example, a certain hypothetical expression is created, and parameters are changed, coefficients are changed, and many experiments are repeated. Analyzing the data together, formulating an equation that matches the phenomenon, and calculating in advance the state of sedimentation at the bottom 11 when the sand, stones, etc. 1 when the flow F is not present is entered by such a simulation equation. It is to be predicted.
[0010]
That is, as shown in FIG. 2, when there is no flow F such as a tidal current or the like, it is indicated by B when the earth and sand 1 or the like 1 is introduced from the solid line barge 2 indicated by A to the bottom 11 immediately below it. Predict the solid accumulation state by simulation.
Next, the barge 2 is placed at the position predicted by the above simulation, and the flow indicated by F is measured at the charging position.
[0011]
Then, it is calculated how much the thrown earth and stone 1 etc. are shifted due to the influence of the flow F.
That is, it is calculated that the flow F shifts from the solid barge 2 indicated by A in FIG.
Therefore, the position of the barge 2 is moved by the arrow H toward the flow F by the above-mentioned deviation amount. In this case, the barge 2 in FIG. In FIG. 2, in consideration of the influence of the flow F, the barge 2 is moved from the position of the solid line A to the broken line D by the arrow H, and earth and sand 1 The introduced earth and sand, stones 1 and the like are deposited at a predetermined position indicated by a solid line B.
[0012]
As for the movement H of the barge 2 as described above, the tug 9 of FIG. 1 may be used, but the barge 2 may be moved with a thruster.
Next, FIG. 3 shows a construction management system diagram when creating a rubble mound, etc., by the method of throwing earth, sand, stones, etc. of the present invention. Transport to the construction site, etc., and predict the result, and predict the influence of the flow F such as tidal current and water flow.
[0013]
On the other hand, positioning is performed by positioning the barge 2 by GPS or the like, the flow F is measured in real time, positioning guidance is performed in consideration of the influence of the flow F, and earth and sand 1 or the like 1 is input.
The accumulated state of the earth and sand, stones, etc. 1 input here, that is, the completed shape is grasped by acoustic sounding, and the predicted shape is determined based on this completed shape, and the next input position is determined. For the depth measurement, the use of a narrow multi-beam device makes it possible to grasp in more detail the state of sedimentation of the earth and sand, stones 1 and the like thrown into the bottom 11.
[0014]
【The invention's effect】
According to the method of throwing earth and sand and stones of the present invention, when throwing earth and sand and stones when creating rubble mounds on the bottom of the water, the flow of tides and water currents at the loading position is measured, and the effect Since it is possible to accurately determine and move the input position in real time, and to accurately insert earth and sand, stones, etc., consumption of unnecessary earth and sand and stones can be reduced, and the efficiency of the input work can be improved. .
[0015]
In addition, by measuring the accumulated state of deposited sand and stones by acoustic depth measurement using a narrow multi-beam device, it is possible to grasp the accumulated state in a more detailed and accurate manner, taking into account the state, such as sediment and stones. The next input becomes possible.
[Brief description of the drawings]
FIG. 1 is a layout view showing a loading work state applied to a loading method for earth and sand or stone according to the present invention.
FIG. 2 is a conceptual diagram for explaining a procedure for charging earth, sand, stones, etc. from a barge according to the method of FIG. 1;
FIG. 3 is a construction management system diagram according to the method of FIG. 1;
[Explanation of symbols]
1 Sediment, stone, etc. 2 Barge 11 Bottom of water F Flow H Movement

Claims (3)

Predicted by calculating in advance the water depth at the place where earth and sand are to be thrown in, and the state of sedimentation at the bottom of the earth when sand and stone are thrown when there is no flow due to the size and shape of the earth and sand to be thrown The barge is placed at the loading position, the flow is measured at the loading position, the amount of earth and sand thrown in by the flow is calculated, and the earth and sand at the loading position where the barge is moved by that amount. A method of throwing stones, stones, etc. The method for loading earth, sand, stones, etc. according to claim 1, wherein the accumulation state of the thrown earth, stone, etc. is grasped by acoustic sounding and the loading position is determined based on this. The method of throwing in earth, sand, stones, etc. according to claim 2, wherein acoustic sounding is performed by a narrow multi-beam device.

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