JP6345164B2 - Waterproof tray and method for transporting contaminants - Google Patents

Description

  The present invention relates to a waterproof tray and a method for transporting contaminants.

As part of the decontamination business, topsoil (contaminated soil) containing radioactive materials may be stripped off. It is common for the earth and sand removed to be stored in a temporary storage area packed in a large soil bag (container bag), and then transported together with the large soil bag to the intermediate storage facility on the loading platform of the transport vehicle ( Patent Document 1).
When transporting contaminated soil, there is a concern that contamination will spread due to leakage of contaminants. In particular, in the case of contaminated soil with a high water content, there is a concern that moisture leaks from the large soil bag.
For this reason, Patent Document 2 discloses a transport method that ensures water-stopping by a transport tool made of a rubber-like elastic body provided so as to cover the inner surface of the loading platform of a transport vehicle.

Japanese Patent Laying-Open No. 2015-099035 JP 2013-252822 A

Since the shape of the platform of the transport vehicle differs depending on the vehicle type, when the transporter is formed of a rubber-like elastic body that is integrally molded in advance, it is necessary to make a custom-made product for each vehicle, which is expensive.
On the other hand, in the case of forming by welding or bonding a plurality of member pieces, it is necessary to perform a work carefully in order to ensure water-stopping, and thus it takes time.
From such a viewpoint, an object of the present invention is to propose a waterproof tray and a pollutant-containing material transport method that can transport pollutant-containing materials easily and inexpensively.
Here, in the present specification, the “contaminant-containing material” means a material that contains a pollutant and also contains water, for example, soil containing a radioactive substance generated as part of a decontamination business (sediment) Etc.), vegetation, deciduous leaves, branches, soils containing pollutants such as heavy metals, organic solvents and agricultural chemicals.

The waterproof tray of the present invention for solving the above-mentioned problems comprises a frame-shaped wall body, and a water shielding sheet that covers the bottom and side surfaces of the space surrounded by the wall body, and the wall body foldable der is, the optionally water shield sheets are overlapped doubly at the bottom, characterized in Rukoto one edge portion of said water shield sheet superposed doubly been thermally welded to the other It is said.
Such a waterproof tray is excellent in workability because a container that ensures water shielding is formed only by expanding the folded wall body.
The wall body is composed of a plurality of resin members whose inner surfaces are connected endlessly via a connecting member and are flat and can be folded in a state where the endless shape is maintained. It is desirable to have a shape that fits within the width of the wall when folded. The storage bag (soil bag) containing the pollutant-containing material is distorted by the soil, stone, or wood contained in the pollutant-containing material, so if the inner surface of the wall is flat, Or it is not caught when taking out. In addition, if the wall body is made of resin, the wall body is deformed when the storage bag and the wall body come into contact with each other, so that damage to the storage bag can be suppressed. The resin member is preferably a hollow structure. Furthermore, if the waterproof sheet fits in the wall when folded, the waterproof tray becomes compact, and the waterproof sheet is less likely to be damaged due to contact with other members when storing and transporting the waterproof tray. Therefore, it is easy to handle.
In addition, since the waterproof tray is not limited to a usable vehicle type, the manufacturing cost can be reduced as compared with the case of manufacturing a custom-made product.
In addition, when a bottom plate is placed on the top surface of the water-impervious sheet at the bottom of the space, when transporting the storage bag packed with the contaminant-containing material, between the storage bag and the water-impervious sheet. It is possible to prevent the water shielding sheet from being damaged by friction.
Further, if a water absorbing material is disposed at the bottom of the space, even if water leaks out of the storage bag, the water absorbing material absorbs the water, so it is more secure.
Moreover, what is necessary is just to use the sheet | seat arrange | positioned between the said resin-made members adjacent to the said connection material, and sewn on the said resin-made members.

In addition, the pollutant-containing material transport method of the present invention includes an assembling process for assembling a waterproof tray, a disposing process for arranging the plurality of waterproof trays on a loading platform of a transport vehicle, and a contaminant-containing material containing moisture in the waterproof tray. A loading step of loading the packed storage bag, and a transporting step of carrying out the contaminant-containing material in a state in which moisture leaked from the storage bag is prevented from scattering from the loading platform, A foldable wall body and a water shielding sheet having an edge fixed to an upper portion of the wall body, and in the assembling step, a waterproof tray is formed by expanding the folded wall body. It is said.
According to such a pollutant-containing material transport method, the pollutant-containing material can be transported in a state in which water-stopping properties are easily secured.

  According to the waterproof tray and the method for transporting contaminants of the present invention, it becomes possible to transport contaminants easily and inexpensively.

(A) is a perspective view which shows the waterproof tray which concerns on embodiment of this invention, (b) is a perspective view which shows the time of folding of the waterproof tray. It is sectional drawing which shows the use condition of the waterproof tray of FIG. It is a figure which shows the loading condition to the conveyance vehicle of a waterproof tray, Comprising: (a) is a side view, (b) is a top view. (A) is a top view which shows typically the installation condition of the waterproof tray of this embodiment, (b)-(d) is a top view which shows typically the installation condition of the waterproof tray which concerns on another form. (A) And (b) is a top view which shows typically the installation condition of the waterproof tray which concerns on another form.

In the embodiment of the present invention, a waterproof tray 1 used when carrying out a sandbag (containment bag) packed with earth and sand (contaminant-containing material) containing radioactive substances generated in the decontamination business, A method for transporting contaminants using the waterproof tray 1 will be described.
For the sandbag, a large sandbag (so-called flexible container bag) formed of a sheet woven with chemical fibers is used. In addition, although the container which accommodates earth and sand is not limited, the container which is lightweight and has water-stopping property is desirable.

As shown in FIGS. 1 and 2, the waterproof tray 1 of the present embodiment includes a wall body 2, a water shielding sheet 3, a bottom plate 4, and a water absorbing material 5.
As shown in FIG. 2, the waterproof tray 1 has a shape that can accommodate the lower part of a large sandbag (soilbag 61). The waterproof tray 1 of the present embodiment, for example, when using a large sandbag of φ1100, is surely the bottom of the large sandbag even if it is deformed by stuffing earth and sand 6 (when the bottom is swollen). Can be accommodated.
In addition, the shape of the waterproof tray 1 is not limited. However, when the sandbag 61 is installed in a transport vehicle and transports the sandbag 61, the waterproof tray 1 is not displaced due to shaking or vibration during traveling and can maintain a stable state. It must be possible. Therefore, in this embodiment, the planar shape of the waterproof tray 1 is a regular octagon. As shown in FIG. 3, the waterproof tray 1 installed in the transport vehicle 7 is brought into surface contact with another adjacent waterproof tray 1 and the side wall (tilt) of the loading platform 71 to ensure stability during transportation. .
The number of waterproof trays 1 installed in the transport vehicle 7 may be set according to the maximum load weight of the transport vehicle 7. That is, when the weight of the sandbag 61 filled with earth and sand 6 is about 1.6 t and a 10 t truck is used as the transport vehicle 7, the maximum load weight of the transport vehicle 7 is 9.6 t. The number of waterproof trays 1 installed in the vehicle 7 is six.
As described above, the shape and size of the waterproof tray 1 is set according to the size of the sandbag 61, the arrangement at the time of installation in the transport vehicle 7, the maximum load weight of the transport vehicle 7, and the like.

As shown in FIG. 1A, the wall body 2 is formed in a frame shape (tubular shape) by combining a plurality of panels 21, 21,. The wall body 2 of the present embodiment is a regular octagon when viewed in plan, but the planar shape of the wall body 2 is not limited. For example, other polygons and circles may be used. It is desirable that at least the inner surface of the wall body 2 of the present embodiment is flat.
In the present embodiment, a polypropylene honeycomb core panel is used as the material constituting the panel 21, but the material constituting the panel 21 is limited as long as it has a predetermined strength and is lightweight and easy to carry. For example, a hollow structure such as cardboard or plastic resin may be used. The panel 21 is preferably made of a resin material which is deformed when placed on the waterproof tray 1 and conforms to the shape of the sandbag 61. The panel 21 may be made of metal. In addition, when using a metal for the panel 21, it is desirable that the material be deformed by the pressure when the sandbag 61 is placed.
The wall body 2 is formed by connecting the rectangular panels 21, 21,. As shown in FIG. 1B, the wall body 2 can be bent at the connecting portion between the panels 21.
In addition, the material which comprises the connection material 22 will not be limited if it connects the panels 21 so that bendability is possible in the state which ensured water-stopping, for example, it straddles across the adjacent panels 21 and 21. It may be a worn waterproof tape or a polypropylene hinge bonded to adjacent panels 21, 21. Furthermore, the sheet | seat which consists of a fiber and resin may be arrange | positioned between the adjacent panels 21 and 21, and a sheet | seat may be sewn on the panels 21 and 21 with a thread | yarn etc. FIG.
Moreover, you may form the wall body 2 by connecting the both ends of the panel by which the bending process was performed for every predetermined space | interval.

As shown in FIG. 1A, the water shielding sheet 3 covers the bottom of the space surrounded by the wall body 2 and the inner side surface of the wall body 2. The water-impervious sheet 3 is made of a soft material that prevents moisture penetration and is deformable. The material constituting the water shielding sheet 3 is not limited. For example, a soft vinyl chloride sheet having a thickness of 1.5 mm or a vinyl chloride resin-coated sheet made of polyester fiber having a thickness of 0.58 mm may be used. That's fine.
The water-impervious sheet 3 is molded in a bowl shape, and the edge portion at the upper end is fixed to the upper end portion of the wall body 2. Although the fixing method to the wall body 2 of the water-impervious sheet 3 is not limited, in this embodiment, the edge of the water-impervious sheet 3 is folded back at the upper end portion of the wall body 2 and folded back to the outer surface of the wall body 2. The parts are bonded. The water shielding sheet 3 may be sewn to the upper end portion of the wall body.
In addition, durability may be strengthened so that the waterproof sheet 3 may not be thinned or damaged by overlapping the waterproof sheet 3 on the bottom of the waterproof tray 1. Although the method of making a water-proof sheet double is not limited, For example, what is necessary is just to heat-weld the edge part of one water-proof sheet to the other water-proof sheet.
Since the water-impervious sheet 3 is made of a deformable material, it is folded together with the wall body 2 when the wall body 2 is folded, as shown in FIG. When the waterproof tray 1 is folded, it is easy to fold it while pulling up the bottom portion of the water shielding sheet 3. The water shielding sheet 3 may be provided with a fold in advance so that it is folded into a predetermined shape when the wall body 2 is folded. Further, the water shielding sheet 3 is not necessarily molded into a bowl shape, and may be one in which an edge portion of a flat sheet material is fixed to the upper end portion of the wall body 2.

As shown in FIG. 2, the bottom plate 4 is a plate material disposed at the bottom of the space surrounded by the wall body 2.
The bottom plate 4 is constituted by a rubber plate having an area equal to or smaller than the inner space area of the wall body 2. In the present embodiment, the bottom plate 4 is laid on the water-impervious sheet 3 so as to be interposed between the sandbag 61 filled with earth and sand 6 and the water-impervious sheet 3. 3 may be placed below or on the top and bottom of the water-impervious sheet 3.
The material constituting the bottom plate 4 is not limited as long as it is flexible and has sufficient strength with respect to the weight of the earth and sand 6 to be loaded. For example, a plastic resin plate is used. May be. Further, the bottom plate 4 is not necessarily a flat plate, and may be, for example, a grid-like plate material or a porous plate. Further, as the bottom plate 4, a plurality of plate materials may be disposed at the bottom of the space surrounded by the wall body 2. Furthermore, the bottom plate 4 may be formed of a flexible material that can be bent.

As shown in FIG. 2, the water absorbing material 5 is disposed at the bottom of the space surrounded by the wall body 2. In the present embodiment, a sheet material (so-called water absorbing sheet) containing a highly water-absorbing polymer is used as the water absorbing material 5. The water absorbing material 5 has an area equal to or larger than the inner space area of the wall body 2 (the cross-sectional area of the space surrounded by the wall body 2) so as to cover the entire bottom of the space surrounded by the wall body 2. .
In the present embodiment, the water absorbing material 5 is laid on the upper surface of the bottom plate 4. That is, the water shielding sheet 3, the bottom plate 4, and the water absorbing material 5 are laminated in order from the lower side on the bottom of the waterproof tray 1 of the present embodiment. In addition, the order of each material laminated | stacked on the bottom part of the waterproof tray 1 is not limited, For example, you may laminate | stack in order of the water-impervious sheet 3, the water absorbing material 5, and the baseplate 4 from the bottom. Further, the water absorbing material 5 may be partially disposed at the bottom of the space surrounded by the wall body 2.
In addition, when the material which does not contain a metal is used for the waterproof tray 1, it becomes easy to incinerate when discarding a waterproof tray.

Next, a method for transporting contaminants using the waterproof tray 1 will be described.
The pollutant-containing material transport method of the present embodiment includes an assembly process, an arrangement process, a loading process, and a transport process.
The assembly process is a process of assembling the waterproof tray 1 (see FIG. 1A).
The waterproof tray 1 is carried in a folded state. In the assembly process, the waterproof tray 1 is formed by manually expanding the wall body 2. In addition, when the wall body 2 and the water shielding sheet 3 of the waterproof tray 1 are carried in a divided state, the waterproof tray 1 is formed by fixing the water shielding sheet 3 to the expanded wall body 2. .

An arrangement | positioning process is a process of arrange | positioning the waterproof tray 1 on the loading platform of a conveyance vehicle (refer FIG. 3).
In the present embodiment, as shown in FIG. 3B, six waterproof trays 1, 1,... The waterproof trays 1 are arranged alternately in two rows of three.
Each waterproof tray 1 is arranged in a state where one side is in contact with the side tilt 72 of the transport vehicle 7. Further, the waterproof tray 1 disposed in the foremost part and the waterproof tray 1 provided in the rearmost part are disposed in contact with the front and rear tilts 73 and 74, respectively. Further, the waterproof tray 1 disposed in the intermediate portion is in surface contact with the waterproof trays 1 and 1 disposed before and after the adjacent row. Further, a gap is formed between the waterproof trays 1 arranged in the front and rear.
In the present embodiment, as shown in FIG. 2, the cushioning material 8 is laid in advance on the floor surface 75 of the loading platform 71. As the buffer material 8, a plate-like material having a shape covering the floor surface 75 is used. The cushioning material 8 of the present embodiment is made of foamed rubber. In addition, although the material which comprises the shock absorbing material 8 is not limited, While absorbing the unevenness | corrugation of the floor surface 75, protrusions, such as gravel remaining on the floor surface 75, it can absorb the impact at the time of transport. Possible materials are desirable.
In the present embodiment, a 10t truck is used as the transport vehicle 7, but the size, type, and the like of the transport vehicle are not limited. Further, the number and the positional relationship of the waterproof trays 1 arranged in the transport vehicle 7 are appropriately set according to the size, shape, maximum load weight, etc. of the transport vehicle 7.

The loading step is a step of placing earth and sand 6 on the waterproof tray 1.
In the present embodiment, a sandbag 61 filled with earth and sand 6 is loaded onto the transport vehicle 7 using a lifting machine such as a crane. At this time, the sandbag 61 is placed in the waterproof tray 1 as shown in FIGS. 3 (a) and 3 (b).

The transportation process is a process of carrying out the earth and sand 6 by the transport vehicle 7 on which the earth and sand 6 is loaded.
At this time, weather resistance deterioration during transportation of the waterproof tray 1 and the sandbag 61 is prevented by placing a hood (not shown) on the loading platform 71 of the transport vehicle 7. The hood may be used as necessary. For example, when a van truck having a so-called wing body is used as the transport vehicle 7, it may be omitted.
A forklift may be used to move the sandbag 61 by placing the waterproof tray 1 on the pallet.

According to the waterproof tray 1 and the pollutant-containing material carrying-out method of the present embodiment, since a container that ensures water shielding is formed only by expanding the folded wall body 2, the workability is excellent.
Moreover, since the waterproof tray 1 can be arrange | positioned without adjusting the vehicle model which can be used by adjusting the magnitude | size of the clearance gap between waterproof trays 1, etc., compared with the case where a custom-made item is manufactured. The manufacturing cost can be reduced, and the transport vehicle 7 can be easily secured.
By using the waterproof tray 1, it is possible to suppress the slippage or collapse of the sandbag 61 during transportation.
Since the shape of the waterproof tray 1 is set according to the size and weight of the sandbag 61 and the shape and maximum load weight of the loading platform 71 of the transport vehicle 7, the waterproof trays 1, 1 disposed on the transport vehicle 7 are used. ,... Can be loaded with the amount of earth and sand 6 corresponding to the capacity of the transport vehicle 7. Therefore, efficient sediment transport can be easily performed.
The waterproof tray 1 is configured by combining a foldable wall body 2 and a deformable water shielding sheet 3 and is lightweight, and thus can be easily carried in a compact shape. Therefore, even when a large amount of the waterproof tray 1 is required, the transportation cost can be reduced. Since the waterproof sheet 3 fits within the width of the wall 2 when the waterproof tray 1 is folded, the waterproof tray 1 when folded is compact.
Since the inner surface of the wall body 2 is flat, even when the outer surface of the sandbag 61 containing dirt and the like is distorted, it is not caught when the sandbag 61 and the waterproof tray 1 are housed and taken out.
In addition, since the resin panel 21 is used as the wall body 2, it is possible to prevent the soil bag 61 from being damaged by the deformation of the wall body 2 when the soil bag 61 contacts the wall body 2. .

Moreover, since the bottom plate 4 is interposed between the water shielding sheet 3 and the sandbag 61, the water shielding sheet 3 may be damaged by friction between the sandbag 6 and the water shielding sheet 3 during transportation. It is prevented.
Since moisture is prevented from leaking out by the water-impervious sheet 3, even if moisture leaks out from the sandbag 61, the waterproof tray 1 does not leak out from the loading platform 71 of the transport vehicle 7.
Further, since the water absorbing material 5 is disposed on the waterproof tray 1, even if water leaks out of the soil bag 61, the water absorbing material 5 absorbs the water, thereby preventing the diffusion of the contamination. be able to.
Since the cushioning material 8 is preliminarily laid on the floor surface 75 of the loading platform, the water shielding sheet 3 is not damaged by gravel remaining on the loading platform 71. Moreover, while absorbing the unevenness | corrugation of the floor surface 75 with the shock absorbing material 8, the water impervious sheet 3 is protected by absorbing the vibration at the time of conveyance.

The embodiment according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and the above-described components can be appropriately changed without departing from the spirit of the present invention.
In the said embodiment, although the case where the earth and sand 6 containing a radioactive substance was carried out was demonstrated, the conveyed product transported using the waterproof tray 1 is not limited to this, For example, heavy metals etc., organic solvents, It may be used when transporting earth and sand containing pollutants such as agricultural chemicals.
Moreover, what is thrown into the waterproof tray 1 is not limited to the earth and sand 6 and may be, for example, fallen leaves, branches, plants and the like.

If a plurality of holes for inserting a rope or the like are formed in the wall body 2 at predetermined intervals in the circumferential direction, the soil bag 61 and the wall body 2 can be integrated by binding the wall body 2 with a rope or the like. Can be achieved. It is also possible to prevent deformation of the wall body 2 and load collapse by tying it with a rope or the like. Moreover, if the hole which penetrates a rope etc. is formed in the wall body 2, the waterproof tray 1 can also be fixed to the loading platform 71 using a rope etc.
For the wall body 2 and the water shielding sheet 3 constituting the waterproof tray 1, it is desirable to use a weather resistant material or to coat a weather resistant paint for the purpose of suppressing the weather resistance deterioration.

In the embodiment, the case where the bottom plate 4 is laid has been described. However, the bottom plate 4 may be laid as necessary and may be omitted.
Moreover, although the said embodiment demonstrated the case where the water absorbing material 5 was arrange | positioned, the water absorbing material 5 should just be arrange | positioned as needed, and may be abbreviate | omitted. Further, the water absorbing material 5 may be disposed on the entire floor surface 75 of the loading platform 71.
Further, the water absorbing material 5 may be omitted by using a material having a water absorbing function as the bottom plate 4.

  In the above embodiment, the case where six waterproof trays 1 are arranged for one 10t truck (transport vehicle 7) (see FIG. 4A) has been described. However, the number of waterproof trays 1 arranged on the loading platform 71 is described. Is not limited. For example, as shown in FIGS. 4B to 4D, by setting the shape (size) of the waterproof tray 1 to a shape corresponding to the size of the sandbag 6, the waterproof tray 1 installed on the loading platform 71. What is necessary is just to set suitably the number and arrangement | positioning. For example, when a 4t truck is used as the transport vehicle 7, as shown in FIGS. 5 (a) and 5 (b), a waterproof tray is used according to the maximum load weight of the transport vehicle 7, the shape of the sandbag 6 and the like. What is necessary is just to set the number of 1 and arrangement | positioning.

DESCRIPTION OF SYMBOLS 1 Waterproof tray 2 Wall body 3 Water shielding sheet 4 Bottom plate 5 Water absorption material 6 Earth and sand (contaminant containing substance)
7 Transport vehicle 8 Buffer material

Claims (6)

A frame-like wall,
A waterproof tray that covers a bottom surface and a side surface of a space surrounded by the wall body,
Ri possible der the wall body is folding,
On the bottom surface, the water shielding sheet is doubled,
One edge portion of one of said water shield sheet superposed doubly characterized that you have been heat-welded to the other, waterproof tray. The wall body is composed of a plurality of resin members having a flat inner surface connected endlessly via a connecting material , and can be folded in a state where the endless shape is maintained,
The waterproof tray according to claim 1, wherein the water shielding sheet has a shape that fits within a width of the wall body when the wall body is folded. The resin member, characterized in that it is a hollow structure, waterproof tray according to 請 Motomeko 2. The waterproof tray according to any one of claims 1 to 3, further comprising a water absorbing material disposed at a bottom of the space . 4. The waterproof tray according to claim 2 , wherein the connecting material is a sheet that is disposed between the resin members adjacent to each other and sewn to the resin members . 5. An assembling step of assembling the waterproof tray according to any one of claims 1 to 5 on a carrier for transportation;
An arrangement step of arranging a plurality of the waterproof trays on a loading platform of a transport vehicle;
A loading step of placing a storage bag filled with a contaminant-containing material containing moisture in the waterproof tray;
A transporting step of transporting the pollutant-containing material in a state in which moisture leaked from the containing bag is prevented from scattering from the loading platform, and a pollutant-containing material transporting method comprising:
The waterproof tray includes a foldable wall body, and a water shielding sheet having an edge fixed to the top of the wall body,
In the assembling process, the waterproof tray is formed by spreading the folded wall body, and the pollutant-containing material transporting method is characterized in that:

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