JPH07229126A - Impervious sheet and method for laying impervious sheet - Google Patents

Abstract

PURPOSE:To improve efficiency by engaging plural floats on a first rope locked on an impervious sheet, and linking the floats with each other by a second rope, and pulling out the first rope to recover the floats floated on the water surface by the second rope. CONSTITUTION:After an impervious sheet main body 2 is let out and floated on the water surface to cover the water surface, a first rope 4 is pulled out from a locking member 3, and the sheet 2 is settled and laid on the bottom of water. Subsequently, at this time, plural floats which are disengaged from the rope 4 and floated on the water surface are linked by a second rope 8. The rope 8 is pulled up to recover the plural floats 5 floating on the water surface at one time. Further, as the ropes 4, 8 are connected to each other, the rope 4 is also recovered with the floats 5. Thus, a laying work can be executed very easily and in a short time, and the recovered members can be reused.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-blocking sheet and a method for laying it on a reclaimed land provided in a harbor, a coast, a river, a lake or the like, or on an inner surface of a revetment and a water bottom in an industrial waste treatment plant. It is about.

[0002]

2. Description of the Related Art Conventionally, a part of the sea area and water area is surrounded by a seawall,
The earth and sand are buried inside it, or used as a place to put industrial waste, etc., but harmful components contained in the earth and sand that are put into the water dissolve in water and permeate through revetments and bottoms. Moreover, there is a concern that it may flow out into the surrounding sea area and water area, causing environmental pollution, which is not preferable.

Therefore, in order to prevent outflow of harmful components to the surroundings, it is practiced to lay a water-blocking sheet on the inner surface of the revetment and the bottom of the water.

However, landfill sites are generally vast, and it is extremely difficult to lay a water-blocking sheet on the inner surface of the revetment and the bottom of the water especially in a reservoir.

Therefore, for example, a plurality of water-blocking sheet pieces to which a plurality of floats are interlocked and imparted with buoyancy are floated at predetermined positions on the water surface in a landfill, and are joined to each other at their side edges to widen. Japanese Patent Publication No. 1-40170 discloses a method of forming a water-impermeable sheet, removing the buoyancy by removing the float, and allowing the water-impermeable sheet to settle and lay it on the water bottom and the inner surface of the seawall. .

In this conventionally known method of laying a water-impervious sheet, a rope is inserted and locked on locking members arranged on the surface of the water-impermeable sheet at appropriate intervals on the surface of the water-impermeable sheet body, and then inserted. In the process, a plurality of floats having an annular engaging portion are inserted and engaged with the rope to give buoyancy to the water-impervious sheet body and to be floated on the water surface and floated, and then the rope is pulled out from the locking member. A plurality of floats are removed to settle the impermeable sheet and lay it on the bottom of the water.

In this conventional example, the impermeable sheet can be laid quickly and easily. However, when the impermeable sheet is settled, a plurality of floats inserted and fastened to the rope are disassembled on the water surface. To float.

Therefore, a plurality of floats that are diffused and floated on the water surface must be collected by using, for example, a ship, which requires a great deal of time and labor.

[0009]

The problem to be solved by the present invention is that, according to the conventionally known method of laying a water-blocking sheet using a float, the water-blocking sheet diffuses and floats on the water surface when the water-blocking sheet sinks. That is, it takes a lot of time and labor to collect the plurality of floating floats.

[0010]

The present invention has been made in order to easily collect a plurality of floats floating on the water surface when the water-blocking sheet is settled, which is the above-mentioned problem. The sheet is a water-impervious sheet body in which locking members are arranged in rows at appropriate intervals on the surface, and a first rope which is sequentially inserted into the locking member and locked along the surface of the water-blocking sheet body. It is characterized in that it comprises a plurality of floats having an annular fastening portion that is fastened to the first rope, and a second rope for connecting the plurality of floats to each other.

Further, according to the method of laying a water-blocking sheet of the present invention, the first rope is inserted and locked in the locking members arranged on the surface of the water-blocking sheet main body at appropriate intervals, and an annular shape is formed during the insertion process. A plurality of floats having engaging portions are inserted into and engaged with a first rope, and a plurality of floats are sequentially connected to each other by using a second rope that is arranged so as to face the first rope. After imparting buoyancy to the seat body to float it on the water surface and float it, the first rope is pulled out from the locking member to separate a plurality of floats connected by the second rope to separate the water impermeable sheet body. It is characterized by being settled and laid on the bottom of the water.

[0012]

[Operation] By connecting a plurality of floats attached to the first rope with the second rope, the plurality of floats that are pulled out from the locking member and floated on the water surface are connected to the second rope. Collect at once by pulling up.

[0013]

Embodiments of the present invention will now be described with reference to the drawings.

The drawings show one embodiment of the present invention, in which the water-blocking sheet 1 has water impermeability and flexibility.
For example, the thickness is 1 to 10 mm, the width is 2 to 10 mm, and the length is 5.
A plurality of locking members 3 of approximately Ω shape are provided at appropriate intervals on the surface of a long water-impervious sheet body 2 made of a vinyl chloride resin sheet or the like having a reinforcing layer made of a braid or the like, if necessary. It is lined up in the direction.

The first rope 4 is attached to each locking member 3.
Are sequentially inserted and arranged along the surface of the water-blocking sheet body 2, and a plurality of floats 5 are attached to the first rope 4.
Is fastened at an annular fastening portion 7 formed at the lower end of the rope-like connecting member 6 extending downwardly.

As the floats 5, those having a well-known structure can be used. For example, as shown in FIG. 2, a hollow sphere made of hard synthetic resin or the like, or as shown in FIG. There are solid ones formed of foamed synthetic resin or the like such as styrofoam resin.

Further, the annular engaging portion 7 formed at the lower end of the float 5 is, for example, as shown in FIG. 2, a device using an annular shape from the beginning, or a rope shape as shown in FIG. The connecting member 6 may be used as it is.

In the case where the annular engaging portion 7 forms an annular shape from the beginning, the first rope 4 is inserted through the locking member 3 and the float 5 alternately during installation. In particular, as shown in FIG. 2, in the case where an annular shape is formed from the beginning, by making the annular part openable and closable, it is possible to extremely easily perform the attachment work during installation.

Further, a second rope 8 is arranged side by side above the first rope 4, both ends of the second rope 8 are connected to both ends of the first rope 4, respectively, and each float 5 is attached. Are connected to each other by the second rope 8.

The second rope 8 and each float 5 may be a short rope 9 as shown in FIG. 3, for example. However, for example, as shown in FIG. 1
By attaching 0 to the rope-shaped connecting member 6 or the second rope 8 (not shown), the time and labor of the connecting work can be reduced.

In the present embodiment having the above-mentioned structure, for example, a large amount of water is applied to the water-blocking sheet main body 2 by giving a buoyancy to the water-blocking sheet main body 2 by means such as that disclosed in Japanese Examined Patent Publication No. 1-40170 and then floating on the water surface. A plurality of floats floating on the water surface after the water impervious sheets are joined together at their side edges to cover most of the water surface, and then the first rope 4 or the first rope 4 and the second rope 8 are disengaged. The reference numeral 5 cuts the second rope 4 and pulls it out from the locking member 3, so that the plurality of floats 5 linked by the second rope 4 are detached and the water-impervious sheet body 2 is settled and laid on the bottom of the water or the like. .

At this time, as shown in FIG. 4, the plurality of floats 5 which are disengaged from the first rope 4 and float on the water surface.
Are connected by a second rope 8.

Therefore, by pulling up the second rope 4, a plurality of floats 5 floating on the water surface can be collected at once.

In particular, since the first rope 4 and the second rope 8 are connected to each other as in this embodiment, the plurality of floats 5 and the first rope 4 as well as the plurality of floats 5 can be easily recovered. it can.

[0025]

According to the present invention having the above-described structure, it is necessary to collect a plurality of floats floating on the water surface when they settle down by a small boat or the like, like a conventional water-blocking sheet using a float. In addition, it is possible to collect a plurality of floats at once by simply pulling up the second rope, so not only can laying work be performed very easily and in a short time, but it is also easy to reuse. is there.

Further, when the first rope and the second rope are connected to each other, the first rope can be collected together with the second rope, which is extremely convenient.

Further, when the second rope and the float are configured to be detachably connected by the engaging member, the laying work can be performed more efficiently and the reuse is easy.

[Brief description of drawings]

FIG. 1 is a perspective partial view schematically showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a float used in the embodiment shown in FIG.

3 is a perspective view showing a float having a different structure used in the embodiment shown in FIG. 1. FIG.

FIG. 4 is an explanatory diagram showing a usage state in the embodiment shown in FIG.

[Explanation of symbols]

 1 Water-impervious sheet 2 Water-impermeable sheet body 3 Locking member 4 First rope 5 Float 7 Engagement part 8 Second rope

Claims (4)

[Claims] 1. A water impervious sheet main body having locking members arranged in rows on the surface at an appropriate interval, and a first rope arranged along the surface of the water impervious sheet main body, which is sequentially inserted and locked by the locking member. And a second rope for connecting the plurality of floats with each other, and a plurality of floats having an annular fastening portion that is fastened to the first rope. 2. The water impervious sheet according to claim 1, wherein the second rope and the float are detachably connected by an engaging member. 3. The water impervious sheet according to claim 1, wherein the second rope and the first rope are connected to each other at both ends thereof. 4. A first rope is inserted into and locked by a locking member arranged on the surface of the water-impervious sheet body at appropriate intervals, and a plurality of floats having an annular engaging portion are formed in the insertion process. The rope is inserted and engaged with the rope, and the plurality of floats are sequentially connected to each other by using the second rope arranged so as to face the first rope to give buoyancy to the water-impervious sheet body and to float on the water surface. After that, by pulling out the first rope from the locking member, a plurality of floats connected to each other by the second rope are separated to settle the water-impervious sheet body and lay it on a water bottom or the like. Method of laying water barrier sheet.