JP4026683B2 - Impermeable sheet and its laying method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water shielding sheet and a laying method thereof.
[0002]
[Prior art]
To create a landfill disposal site by dumping and landfilling the area where the surface of the sea or lake is divided into a predetermined size by landfill revetment, in order to prevent harmful substances from spreading and flowing out of the repository It is necessary to lay a waterproof sheet. Since it is not possible to lay this impermeable sheet alone, a plurality of impermeable sheets have been joined. As a conventional method of laying a water-impervious sheet, the invention of Japanese Patent Application Laid-Open No. 2002-126683 is disclosed. In this installation method, using water shield sheet Attach integrally along the container as floaters or pyramidal in length.
[0003]
[Problems to be solved by the invention]
However, in the above laying method, when the impermeable sheet is floated on the sea surface, as shown in FIG. 14, the impermeable sheet 18 is loosened, so that it is difficult to perform joining and laying work in a straight stretched state. It was.
[0004]
This invention is made | formed in view of the above problems, The objective is to provide the water shielding sheet | seat which can perform joining and laying work in the state extended straight, and its laying method. .
[0005]
[Means for Solving the Problems]
Above the gist of the impermeable sheet of the present invention to solve the problems, floating bodies extending along the short side direction on the upper surface of the seat body is removable freely mounted in hanger, before Ki浮 sheet Mounted at appropriate intervals in the long side direction of the main body, ball buoys are installed with appropriate intervals on the upper surface of the sheet main body between these floating bodies with hanging tools, and suspended from the center part of the floating body on the left and right ends The tool is inclined outward from the seat body toward the floating body . When the water-impervious sheet is floated on water, when the sheet main body is suspended by the hanging tool from the floating body, tension is applied to the sheet between the hanging tools, so that the sheet can be floated straightly. In particular, when the installation interval of the floating bodies is reduced or ball buoys are provided between the floating bodies with a hanging tool, the suspension interval is reduced and the water shielding sheet is stretched straight. Further, when the hanging tool is inclined outward from the seat main body, a force that extends outwardly acts on the seat main body, so that the water shielding sheet can be straightened.
[0006]
Further, the gist of the method of laying the water shielding sheet is that a floating body extending along the short side direction is detachably attached to the upper surface of the sheet main body with a hanging tool, and the floating body is disposed at appropriate intervals in the long side direction of the sheet main body. Ball buoys are installed on the upper surface of the sheet body between these floating bodies with appropriate intervals by means of hanging tools, and the hanging tools located on both the left and right sides from the center of the floating body face the floating body from the seat body. After forming a water shielding sheet that is inclined outward, the plurality of water shielding sheets are floated in the water, and then a pontoon is floated between the edges in the long side direction of adjacent water shielding sheets, and the base ship is inclined. One long side is submerged in water, and the end in the long side direction of one water-impervious sheet is pulled up on the upper surface, and the other long side is inclined by tilting the carriage on the opposite side to the above. Submerge it in the water and the other water-impervious sheet After pulling the end of the side direction, and joining these water shield sheets together, characterized by sinking the water shield sheets this junction.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a water-impervious sheet and a laying method thereof according to the present invention will be described with reference to the drawings. This water-impervious sheet is laid on the sea floor of a sea surface landfill site (hereinafter referred to as a sea surface landfill site) where waste is dumped and landed in an area where the sea surface is divided into predetermined sizes by landfill revetments. First, the water shielding sheet will be described, and then a laying method using the sheet will be described. In the embodiments, the same components are described with the same reference numerals, and only different components are described with different reference numerals.
[0008]
FIG. 1 shows a water shielding sheet 1 according to a first embodiment. The water shield sheet 1 and the sheet body 2, along the short side direction of the seat body 2, and the floating body 3 provided for each appropriate intervals in the longitudinal direction, the ball buoy 4 disposed between these float 3 It is comprised by.
[0009]
The sheet body 2 is formed of a material such as a rubber material, a resin material, or a thermoplastic elastomer so as to have a thickness of about 1 to 5 mm, and hooks 5 are provided at appropriate intervals in the vertical and horizontal directions on the upper surface. The floating body 3 and the ball buoy 4 are detachably attached by the hanging tool 6.
[0010]
On the other hand, the floating body 3 is formed by inserting and fixing stopper plugs 8 at both ends of a resin hose 7 having a diameter of about 200 to 300 mm. Bonded or tightly bonded with adhesive tape or hook-and-loop fastener. When air is injected into the floating body 3 from the air supply pipe 10, in addition to functioning as a floater, it also functions as a rigid support material (for example, a vinyl chloride pipe), so that the seat body 2 extends straight. become. This is because the sheet 2a between the suspending tools is tensioned by the suspending tool 6 that does not change the suspending interval a so that the sheet 2a is not loosened. Therefore, if the suspension intervals a and b of the suspension 6 are not changed at all (for example, the suspension 6 is used as a rod and rigidly joined to the floating body 3), the sheet body 2 extends straight. become.
[0011]
FIG. 4 shows the water shielding sheet 12 of the second embodiment. This water-impervious sheet 12 is one in which the hanging tool 6 on both ends is inclined outward from the sheet main body 2 toward the floating body 3, and the other configuration is the same as that of the water-impervious sheet 1 of the first embodiment. is there. When the hanging tool 6 on both ends is inclined as described above, a force extending outward is applied to the sheet body 2.
[0012]
FIG. 5 shows a water shielding sheet 13 of the third embodiment. This water-impervious sheet 13 is formed by inclining suspensions 6 positioned on the left and right end sides from the center of the floating body 3 outward from the sheet body 2 toward the floating body 3. It is the same structure as the water-impervious sheet 1 of the embodiment. In this way, when the hanging tools 6 on the left and right ends are inclined in opposite directions, the force for extending the seat body 2 to the outside increases.
[0013]
Moreover, although the water-impervious sheet of the above-described embodiment is configured by a combination of the floating body 3 and the ball buoy 4, the water-impervious sheet provided with only the floating body 3 and the floating body 3 are provided in a lattice shape. It can also be used as a water shielding sheet.
[0014]
Next, a method of laying the water shielding sheet of the first embodiment on the sea surface landfill site, that is, a method of laying using the water shielding sheet 1 of the first embodiment will be described. Since this is not possible with a single sheet of impervious sheet, a plurality of impervious sheets floated in the sea are joined on a trolley and then laid. Therefore, the above-described water-impervious sheet is also manufactured at a manufacturing yard in a factory or on-site, and in the present embodiment, a case of manufacturing on-site will be described.
[0015]
First, as shown in FIG. 6 (1), a sheet body 2 is prepared, and hooks 5 are attached to the upper surface of the sheet main body 2 at appropriate intervals in the vertical and horizontal directions by heat welding, an adhesive, an adhesive tape, or a hook-and-loop fastener. Next, as shown in (2) of the figure, the stopper plugs 8 are fitted and fixed at both ends of the resin hose 7 having a diameter of about 200 to 300 mm, and the suspension band 9 is attached so as to wind the resin hose 7. The floating body 3 is formed. Next, as shown in (3) of the figure, when the hanging tool 6 bound to the suspension band is bound to the hook 5, the floating body 3 is detachably attached to the seat body 2. Then, the ball buoy 4 is removably attached to the hook 5 between the floating bodies 3 with the hanging tool 6 to complete the water-impervious sheet 1 (see FIG. 7). Next, air is injected from the air supply pipe 10 with the compressor 11 to inflate the floating body 3.
[0016]
Next, as shown in FIG. 8, when a plurality of the water shielding sheets 1 are drawn into the underwater 15 of the sea surface landfill disposal site 14, they float in a state of being straightened by the floating body 3 and the ball buoy 4. Next, as shown to (1) of FIG. 9, the base boat 16 is floated between these water-impervious sheets 1, and the edge of the long side direction of the water-impervious sheet 1 is joined on this.
[0017]
In this joining method, as shown in (2) of the figure, the boat 16 is inclined so that one long side sinks into the water, and the end in the long side direction of one water shielding sheet 1 is formed on the upper surface. Pull up. Next, as shown in (3) of the figure, the base boat 16 is inclined so that the other long side sinks into the water, and the end in the long side direction of the other water shielding sheet 1 is pulled up on the upper surface. These ends are brought together. Next, as shown in FIG. 10, the joined ends are joined with an adhesive tape 17. This joining can be performed by heat welding or an adhesive in addition to the adhesive tape 17. In this manner, the end portions of the water-impervious sheet 1 are sequentially joined from the front end side to the rear end side, and after joining all, the carriage 16 is inclined so that the rear side sinks into the water, and the joined water-impervious feature Return the sheet to the sea (see FIG. 11). A plurality of water-impervious sheets are sequentially joined by such a method to manufacture a sheet having a predetermined size. Thus, the joining operation | work of the water-impervious sheet 1 extended straight can be performed easily and rapidly.
[0018]
Next, when a weight is placed on the water shielding sheet having a predetermined size and the floating body 3 and the ball buoy 4 are removed from the hook 5 (not shown), the water shielding sheet sinks and is laid on the seabed. Further, the floating body 3 and the ball buoy 4 removed from the water shielding sheet can be diverted to others, and the non-diverted floating body 3 can be used as a weight body by injecting water or the like.
[0019]
This method of soaking water-barrier sheet having a predetermined size as, the instead of removing the floating body 3 from the hook 5 as may be submerged by removing the air in the float 3. Furthermore, when correcting the laying state of the water shielding sheet after being submerged, air can be reinjected into the floating body 3 in the sea to float the water shielding sheet, and after adjustment, it can be submerged again. Then, after the water shielding sheet is re-sinked, the diver removes the floating body 3 (the ball buoy 4 is removed before the sinking) and diverts it to others. In addition to removing air from the floating body 3, water can be poured into the floating body 3 to submerge the water shielding sheet, and removal of the floating body 3 after submerging is performed in the same manner as described above.
[0020]
Next, a method for laying a water shielding sheet according to the second embodiment will be described. This also uses the water-impervious sheet 1 of the first embodiment as described above, and does not join the water-impervious sheets 1 to each other by the trolley 16 as described above, but at the production yard. One of them is joined to produce a predetermined size, which is drawn into the sea 15 of the sea surface landfill site 14.
As shown in FIG. 12 (1), the water shielding sheets 1 are joined to each other with an adhesive tape 17 or heat welding and an adhesive to produce a water shielding sheet of a predetermined size. Air is injected into the floating body 3. Then, the seat body 2 is straightened so that the suspension interval a of each suspension tool 6 in the floating body 3 is not changed (for example, each suspension tool 6 is used as a bar and rigidly joined to the floating body 3). To stretch. In addition, it is also possible to prevent the suspension interval b of these suspensions 6 from being changed by rigidly joining the suspensions 6 only at both ends of the floating body 3 as rods.
When the water-impervious sheet having such a predetermined size is drawn into the underwater 15 of the sea surface landfill disposal site 14, the sheet main body 2 can be floated in a straightened state. And after this, it sinks by the same method as the laying method of the impermeable sheet of 1st Embodiment, and is laid on the seabed.
[0021]
Moreover, the laying method of the water-impervious sheet of the first and second embodiments both uses the water-impervious sheet 1 of the first embodiment, but the second and third water-impervious sheets 12 and 13 are used. When used, the same method as described above is used. That is, as shown in FIG. 13, the sheet main body 2 is pulled to both ends by the inclined hanging tool 6 when the water shielding sheets 12 (or the water shielding sheets 13) are joined to each other with the adhesive tape 17. It can be laid and suspended in the sea in a straight state.
Further, each of the above-described water-impervious sheets 1, 12, and 13 is configured by a combination of the floating body 3 and the ball buoy 4. It can also be laid using a waterproof sheet.
Furthermore, although the above-mentioned landfill disposal site is targeted at the sea surface landfill disposal site, the landfill disposal site in the lake can also be targeted.
[0022]
【The invention's effect】
The impermeable sheet can be floated on the water in a straightened state.
[0023]
Since water barrier sheet is had floating in an extended state straight, longitudinal end of the water barrier sheet may be pulled to easily barge and will be able in a short time also the bonding operation.
[Brief description of the drawings]
FIG. 1 is a perspective view of a water shielding sheet according to a first embodiment.
2A is a cross-sectional view of an end of a floating body, and FIG. 2B is a cross-sectional view taken along line AA of FIG.
FIG. 3 is a front view of the water shielding sheet according to the first embodiment.
FIG. 4 is a front view of a water shielding sheet according to a second embodiment.
FIG. 5 is a front view of a water shielding sheet according to a third embodiment.
6 (1) to (3) are perspective views showing a method for manufacturing a water shielding sheet. FIG.
FIG. 7 is a conceptual diagram of a water shielding sheet according to the first embodiment.
FIG. 8 is a perspective view of a state in which a plurality of water shielding sheets are drawn into the sea.
FIG. 9 shows a method of joining the end portions of the water shielding sheet, (1) is a perspective view with a trolley floating between the water shielding sheets, (2) is a sectional view in which the craft is inclined in one direction, (3) is a cross-sectional view in which the carriage is inclined in the opposite direction to (2).
FIGS. 10A and 10B are perspective views of a method of joining the end portions of a water shielding sheet on a trolley, and FIG. 10B is a cross-sectional view of the method.
FIGS. 11A and 11B are perspective views in which a water shielding sheet is submerged in the sea from a trolley, and FIG. 11B is a cross-sectional view thereof.
FIGS. 12A and 12B are diagrams illustrating a method of laying a second water-impervious sheet.
FIGS. 13A and 13B are diagrams showing another method of laying a water shielding sheet.
FIG. 14 is a perspective view showing a conventional method for laying a water shielding sheet.
[Explanation of symbols]
1, 12, 13, 18 Water shielding sheet 2 Sheet body 3 Floating body 4 Ball buoy 5 Hook 6 Hanging tool 7 Resin hose 8 Stopper 9 Hanging band 10 Air supply pipe 11 Compressor 14 Sea surface landfill site 15 Underwater 16 Carrier 17 Bond tape

Claims (2)

Floating bodies extending along the short side direction on the upper surface of the seat body is removable freely mounted in hanger, before Ki浮 body is attached to each appropriate intervals in the longitudinal direction of the seat body, between these floating bodies Ball buoys are installed on the upper surface of the seat body at appropriate intervals with suspension tools, and the suspension tools located on the left and right sides from the center of the floating body are inclined outward from the seat body toward the floating body. Characteristic water shielding sheet. Floating bodies extending along the short side direction on the upper surface of the seat body is removable freely mounted in hanger, the floating body is attached to each appropriate intervals in the longitudinal direction of the seat body, the seat body between these floating bodies Ball buoys are installed on the upper surface of the floating body at appropriate intervals with suspension tools, and the suspension tools positioned on both the left and right sides from the center of the floating body have water-impervious sheets that are inclined outward from the seat body toward the floating body. After forming and floating a plurality of the water shielding sheets in the water, the base boat is floated between the edges in the long side direction of the adjacent water shielding sheets, and the one side of the long side is submerged in the water by inclining the base boat. The upper edge of one of the water-impervious sheets is pulled up on the upper surface, and the carrier is inclined to the opposite side to sunk the other long side in water. after pulling the end of the long side of the water sheet, which Water barrier between the sheets by bonding, laying method water shield sheet, which comprises sinking a water shield sheet which this junction.

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