JP7202221B2 - Drainage device and drainage method for earthen boat - Google Patents

Description

TECHNICAL FIELD The present invention relates to a drainage device and a drainage method for a soil carrier used for transporting dredged soil or the like.

Conventionally, in areas where it is difficult to obtain good quality sand, when creating a landfill bed, grab buckets and the like are used in neighboring seas to dredge the soil from the bottom of the sea and load it onto a soil carrier to create a landfill bed. It may be used by transporting it to the area where it is used or its vicinity.

However, when soil is loaded onto a soil transport ship using a grab bucket, etc., a large amount of water is involved with the soil, and is loaded in the hold as surplus water. There was a problem of

In addition, when this softened soil is thrown as a landfill material, turbidity tends to occur in the water area to which it is put, which may adversely affect the surrounding environment.

Furthermore, since the soil containing a large amount of water causes a large amount of subsidence due to the surcharge caused by landfilling, there is a problem that the amount and number of times of inputting landfill materials to create a landfill ground of a predetermined height increases. was there.

Furthermore, even when soil is to be disposed of at a disposal site, it is not preferable from the viewpoint of effective utilization of the disposal site to throw in soil that has expanded in volume due to water absorption.

On the other hand, a soil transport ship used for transporting soil has been developed that is equipped with a drainage device for discharging surplus water in the hold to the outside (see, for example, Patent Document 1).

This earthenware ship drainage system has an annular drain pipe arranged along the peripheral wall at the bottom of the hold. Installed at the four corners, the water that has flowed into the water collection pipe is pumped up by a pump installed at the bottom of the water collection pipe and discharged to the outside.

Japanese Patent No. 5165128

However, in the conventional technology as described above, since the annular drain pipe is arranged at the bottom of the hold and the vertical water collection pipes are installed at the four corners of the hold, the volume of the hold must be sacrificed accordingly. Therefore, there is a problem that the amount of soil that can be loaded on a soil carrier is reduced.

In the case of cohesive soil, since the water permeability is low, it takes time for surplus water to reach the drain pipes placed at the bottom and the water collection pipes placed at the four corners, resulting in poor water collection efficiency and high drainage. There was a problem that the effect could not be expected.

SUMMARY OF THE INVENTION Accordingly, in view of such conventional problems, the present invention has been made for the purpose of providing a drainage device and a drainage method for a soil transport boat that has a high drainage effect and can prevent soil from softening by absorbing water. be.

The feature of the invention described in claim 1 for solving the conventional problems as described above is a drainage device for an earthenware ship for discharging surplus water from the hold of an earthenware ship. a water collection pipe connected to the water collection pipe via a drainage hose, a plurality of drain materials laid on or in the soil deposited in the hold, and a drainage means connected to the water collection pipe. In addition, the drain material is formed to have a width shorter than that of a soil removal door which is openable and closable under the cargo hold, and excess water in the cargo hold is discharged through the drain material.

A feature of the invention according to claim 2 is that, in addition to the configuration of claim 1, the drain means is a vacuum pump connected to the water collecting pipe, and the vacuum pump applies negative pressure to the water collecting pipe. to suck and discharge surplus water.

In addition to the configuration of claim 1, the feature of the invention according to claim 3 is that the drainage means includes a vertical water collection pipe connected to the water collection pipe, and a drainage pump installed at the bottom of the vertical water collection pipe. , and the water that has flowed into the vertical water collection pipe is discharged outside by the drainage pump.

A feature of the invention according to claim 4 is that, in addition to the configuration according to any one of claims 1 to 3 , a reinforcing member is provided along the drain member and/or the drain hose.

The feature of the invention according to claim 5 is a drainage method for an earthenware ship for discharging surplus water from the hold of an earthenware ship. A plurality of drain materials formed shorter than the width of a soil removal door that is connected via a water collection pipe and a drainage hose and that is openable and closable under the hold is directed toward the center from the side of the hold. Excess water in the hold is drained from the drain material by a drainage means connected to the water collecting pipe.

The feature of the invention according to claim 6 is that, in addition to the configuration of claim 5 , after laying the drain material on the soil put into the hold, new soil is put into the hold, and the new soil is added to the hold. The purpose of this invention is to lay the drain material on a large amount of soil and install the drain material in a multistage arrangement.

The drainage device for a soil transport ship according to the present invention is provided with the configuration described in claim 1, so that the drain material can be laid according to the situation, and even if the soil has low permeability, the surplus can be efficiently discharged. Water can be discharged, and softening due to water absorption of soil can be prevented. In addition, when the soil discharge door is opened to discharge the soil, the drain material can be prevented from being drawn into the water.

Further, in the present invention, by providing the configuration of claim 2, surplus water can be quickly absorbed through the drain material by the action of the negative pressure.

Moreover, in the present invention, by providing the configuration according to claim 3, surplus water collected through the drain material can be efficiently drained from the vertically oriented water collecting pipe.

Furthermore, in the present invention, by providing the configuration described in claim 4 , it is possible to prevent the drain material and the drainage hose from being damaged due to the impact when the soil is put in and discharged.

In addition, the drainage method for a soil transport ship according to the present invention has the configuration described in claim 5 , so that the drain material can be laid according to the situation, and even soil with low permeability can be efficiently drained. It can drain well and prevent the soil from softening due to water absorption. In addition, when the soil is discharged by opening the soil removal door, the drain material is not drawn into the water. It is possible to quickly move to the loading place.

Furthermore, according to the present invention, by providing the configuration described in claim 6 , it is possible to start discharging surplus water at the same time as the start of throwing in soil, and by arranging the drain material in multiple layers, it is possible to Even soil with low permeability can efficiently absorb water.

1 is a cross-sectional view showing an example of a mode of use of a drainage device for a soil transport ship according to the present invention; FIG. It is a cross-sectional view taken along the line A-A of the same. It is a top view same as the above. 1(a) to 1(c) are cross-sectional views showing procedures of a method for draining a soil transport ship according to the present invention. (a) to (c) are plan views showing the same procedure. FIG. 4 is a cross-sectional view showing another example of a usage mode of the drainage device for a soil transport ship according to the present invention. It is BB line arrow directional cross-sectional view same as the above. It is a top view same as the above. 1(a) to 1(c) are cross-sectional views showing procedures of a method for draining a soil transport ship according to the present invention. (a) to (c) are plan views showing the same procedure.

Next, an embodiment of a drainage device for a soil transport ship according to the present invention will be described based on the embodiments shown in FIGS. 1 to 3. FIG. In the drawing, reference numeral 1 is a soil transport ship, and reference numeral 2 is a water surface.

A soil transport ship 1 has a hold portion 3 with an open top surface, and soil 5 is thrown into the hold portion 3 from the opening portion of the top surface by a grab bucket 4 or the like.

Further, the soil transport ship 1 is provided with openable and closable soil unloading doors 6, 6 under the hold 3, and by opening the unloading doors 6, 6, the soil 5 in the hold 3 can be discharged. It's like

Furthermore, the earthenware ship 1 is equipped with a drainage device for discharging surplus water 7 from the hold portion 3 of the earthenware ship 1. - 特許庁

The drainage device is connected to a water collection pipe 8 arranged around the hold 3 and connected to the water collection pipe 8 via a drainage hose 9, and is laid on or in the soil 5 deposited in the hold 3. and drainage means connected to the water collecting pipe 8, and the surplus water 7 in the hold 3 is absorbed and discharged through the drain members 10, 10, . . .

The water collection pipe 8 is formed in a rectangular annular shape along the periphery of the hold portion 3, and one end of each drain hose 9 is connected to the opposing long side portions arranged on both sides of the hold portion 3 at a predetermined interval, Drain members 10, 10, . . . are connected via a drain hose 9. The position of the water collection pipe 8 is not limited to the inner side of the cargo hold 3 as in the embodiment, and may be arranged at the edge of the opening of the cargo hold 3 or the like.

A vacuum pump 11 as a draining means is connected to the water collecting pipe 8 so that a negative pressure is applied to the water collecting pipe 8 by the vacuum pump 11 .

The drain hose 9 is flexible and has a sufficient length up to the vicinity of the bottom surface of the hold section 3 .

This drain hose 9 is provided with reinforcing material (not shown) along the longitudinal direction, and is reinforced while having flexibility.

The reinforcing material is not particularly limited, but for example, a flexible metal wire or plate may be fixed to the outer periphery of the drain hose 9 along the longitudinal direction, and the mesh-like hose member may be used to fix the outer periphery of the drain hose 9. may be coated.

The drain members 10, 10 . . . are, for example, plastic board drains, and are formed in the shape of flexible thin thin plates.

The drain members 10, 10, . It is designed not to be dragged into the water when released.

Although not shown, the plastic board drain includes a belt-shaped core material with a zigzag cross section and a filter-like water permeable material covering the outer surface of the core material, and can pass water in a state where the soil 5 is blocked by the permeable material. It's like

Also, the drain members 10, 10, .

This reinforcing member is not particularly limited, but for example, a flexible metal wire or plate is fixed to the outer circumference of the drain member 10 along the longitudinal direction.

A cap (not shown) is connected to the end of each of the drain members 10, 10, and connected to one end of the drain hose 9 through the cap.

Next, a method of draining the dirt carrier 1 using such a draining device will be described.

First, the drain members 10, 10, . .

In this state, the grab bucket 4 or the like is used to start throwing in the soil 5 from the top opening, and the soil 5 is loaded until a certain amount of the soil 5 accumulates on the bottom of the hold section 3 .

At this time, since the drain materials 10, 10, . . .

On the other hand, the water taken into the grab bucket 4 together with the soil 5 is caught in the hold 3, and the excess water 7 is accumulated on the upper surface of the deposited soil 5. - 特許庁

Next, as shown in FIGS. 4(b) and 5(b), drain materials 10, 10, . In addition, since the drain members 10, 10, . . . A plurality of drain materials 10, 10 . . .

At that time, since the drain materials 10, 10 ... use a thin and flexible material such as a plastic board drain, even if there is unevenness on the upper surface of the deposited soil 5, the unevenness It can be laid to follow and can be reliably laid in a place where surplus water 7 is accumulated.

Also, since the drain members 10, 10, . . .

After the completion of the laying of the drain materials 10, 10 . By operating the vacuum pump 11 as a means to apply a negative pressure to the water collection pipe 8, the drain materials 10, 10, . . . , drain hose 9 and water collection pipe 8 to discharge outside earthen barge 1 .

The discharged surplus water 7 is absorbed in a state where the soil 5 is blocked by the permeable material. You may make it discharge|eject after performing a filtration process as needed.

Then, the soil 5 is continued to be added, and the soil 5 is loaded until a certain amount of the soil 5 is deposited in the hold 3. As shown in FIGS. Drain materials 10, 10, . . .

In this way, the work of throwing the soil 5 and the work of laying the drain materials 10, 10, . . . are repeated, and the drain materials 10, 10, .

When the loading of a predetermined amount of soil 5 is completed, the operation of the vacuum pump 11, which is the drainage means, is continued in that state to apply negative pressure to the water collection pipe 8, and the surplus water 7 in the hold 3 is drained with a drain material. It absorbs water from 10, 10, and discharges it to the outside of the soil transport ship 1 via drain materials 10, 10, , a drainage hose 9, and a water collecting pipe 8. - 特許庁In addition, the discharge of the excess water 7 can also be performed while the soil transport ship 1 is moving.

After the surplus water 7 in the hold 3 is sufficiently discharged, the vacuum pump 11, which is a draining means, is stopped and the soil 5 is transported to a predetermined discharge place.

After the soil 5 is transported, the soil removal doors 6, 6 under the cargo hold 3 are opened at a predetermined location, and the soil 5 is discharged. At this time, the drain members 10, 10, . will not be dragged into the water when the is released.

After the soil 5 is discharged, since the drain materials 10, 10, . It is possible to move to Also, using the moving time of the soil transport ship 1, the drain materials 10, 10... are lifted from the hold section 3, each drain material 10, 10... is withdrawn from the hold section 3, for example, may be temporarily placed on the deck of the In this way, by keeping the drain materials 10, 10, .

In the drainage method using the drainage device configured in this way, the discharge of surplus water can be started from the state before the loading of the soil 5 is completed, and the drain materials 10, 10 can be used according to the loading amount and the properties of the soil 5. can be arranged in multiple stages, the surplus water 7 in the hold 3 can be discharged quickly and efficiently, and the softening of the soil 5 due to water absorption during transportation can be suppressed.

In particular, even if the soil to be loaded has low permeability such as cohesive soil, each drain material is arranged in multiple stages at the height required for water absorption, so a high drainage effect can be achieved. Obtainable.

Next, another embodiment of a drainage device for a soil transport ship according to the present invention will be described with reference to FIGS. 6 to 8. FIG. It should be noted that the same reference numerals are given to the same configurations as those of the above-described embodiment, and the description thereof will be omitted.

This drainage device is connected to a water collecting pipe 8 arranged around the bottom side of the hold portion 3 and connected to the water collecting pipe 8 via a drainage hose 9, and the water is collected on or in the soil 5 deposited in the hold portion 3. It is provided with a plurality of drain materials 10, 10, .

The water collecting pipe 8 is formed in a rectangular annular shape along the inner lower part of the hold portion 3, and one end of each drain hose 9 is connected to the opposing long side portion at a predetermined interval. 10, 10 . . . are connected.

In addition, the drain hose 9 has flexibility, and is long enough to bring the connected drain materials 10, 10... out of the cargo hold from the upper opening of the cargo hold 3 and to evacuate to the outside of the cargo hold 3. It has a

On the other hand, as the drainage means, a vertically oriented water collection pipe 20 connected to the water collection pipe 8 is installed at the corner of the hold 3, and a water drainage pump 21 installed at the bottom of the vertical water collection pipe 20 vertically collects water. The water flowing into the water pipe 20 is pumped up and discharged to the outside through the drain pipe 22. - 特許庁

The vertically oriented water collecting pipe 20 is formed in a tubular shape with its axial direction directed vertically, and both ends of the annular water collecting pipe 8 are communicated with the lower end thereof, so that the water in the water collecting pipe 8 flows into the inside. there is

Although not shown, the vertical water collecting pipe 20 has a large number of permeable holes formed in its outer periphery, and the water in the hold section 3 also flows into the pipe through these permeable holes.

The vertical water collection pipe 20 has an outer peripheral surface covered with a sheet-like filter material made of non-woven fabric, and the filter material blocks the soil 5, allowing only water to flow in through the permeable holes.

The drainage pump 21 is installed at the bottom of the vertically oriented water collecting pipe 20 and pumps up the water in the vertically oriented water collecting pipe 20 .

In order to drain the surplus water 7 from the hold 3 using this drainage device, as shown in FIGS. Laying work of the materials 10, 10... is repeated, and the drain materials 10, 10... are installed in a multistage arrangement.

Then, water flows into the water collection pipe 8 through the laid drain materials 10, 10 . By pumping up the water and discharging it to the outside of the hold 3, the water flows into the water collection pipe 8 through the laid drain materials 10, 10 . By repeating the process and the process of pumping up water with the drainage pump 21 and discharging it outside the cargo hold through the drainage pipe 22, the surplus water 7 in the cargo space 3 is sequentially discharged to the outside.

In the above-described embodiment, the drain materials 10, 10 are arranged in two stages with respect to the soil 5 deposited in the hold section 3, but the drain materials 10, 10 are arranged in only one stage. Laying may be used, or multi-stage arrangement of three or more stages may be used.

Further, in the above-described embodiment, the open bottom type soil transport ship 1 having the soil removal doors 6, 6 under the hold 3 has been described, but the type of the soil transport ship 1 is not limited. It can also be applied to a closed-type dirt carrier 1 whose bottom side does not open and close.

1 Dirt carrier 2 Water surface 3 Hull 4 Grab bucket 5 Dirt 6 Door for soil removal 7 Surplus water 8 Water collection pipe 9 Drainage hose 10 Drain material 11 Vacuum pump 20 Vertical water collection pipe 21 Drainage pump 22 Drainage pipe

Claims (6)

In a drainage device for a soil transport ship that discharges surplus water from the hold of the soil transport ship,
A water collection pipe arranged around the hold, a plurality of drain materials connected to the water collection pipe via a drainage hose and laid on or in the soil deposited in the hold, and the water collection pipe and a drainage means connected to the cargo hold, wherein the drain material is formed to be shorter than the width of an earth removal door that is openable and closable under the cargo hold, and surplus water in the cargo hold is discharged through the drain material. A drainage device for a soil transport ship characterized by: 2. Drainage of earthen barge according to claim 1, wherein said drainage means is a vacuum pump connected to said water collection pipe, and said vacuum pump applies negative pressure to said water collection pipe to suck and discharge surplus water. Device. The drainage means includes a vertical water collection pipe connected to the water collection pipe, and a drainage pump installed at the bottom of the vertical water collection pipe, and the water flowing into the vertical water collection pipe is discharged to the outside by the water drainage pump. 2. A drainage device for a soil transport ship according to claim 1, wherein the water is discharged. 4. The drainage device for a soil transport ship according to any one of claims 1 to 3 , wherein a reinforcing member is provided along said drain member and/or said drainage hose. In a drainage method for a soil transport ship for discharging surplus water from the hold of the soil transport ship,
It is connected to the soil thrown into the hold through a water collection pipe and a drainage hose arranged around the hold , and is formed shorter than the width of a soil removal door installed openable and closable under the hold. A plurality of drain materials are laid toward the center from the side part of the hold, and excess water in the hold is discharged from the drain material by a drainage means connected to the water collection pipe. Drainage method of soil transport boat. After laying the drain material on the soil thrown into the hold, new soil is put into the hold, the drain material is laid on the new soil, and the drain material is arranged in multiple stages. The drainage method for a soil transport ship according to claim 5 .

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