JPH07229128A - Impervious sheet and method for laying impervious sheet - Google Patents

Abstract

PURPOSE:To improve efficiency by holding cylindrical air floats by the locking parts of the surface of an impervious sheet to give buoyancy to the sheet, letting out the sheet to be floated on the water surface, then removing the floats, and settling the sheet to be laid on the bottom of water. CONSTITUTION:Long hollow cylindrical air floats 4 are held by locking parts 3 to give buoyancy to an impervious sheet main body 2. After the sheet 2 is let out to be floated on the water surface, the floats 4 are removed from the locking parts 3, and the buoyancy of the sheet 2 is removed to settle the sheet and lay the same on the bottom of water. Subsequently, the floats 4 are connected to each other by a connecting member 6 such as a short rope or the like, so that the plural floats 4 removed from the sheet 2 can be collectively recovered. Further, the floats 4 are charged with a flowable heavy material such as cement slug or the like through an air supply and exhaust port 5 to prevent the impervious sheet 1 settled on the bottom of water from floating. Thus, handling including transport for the sheet can be facilitated, the sheet can be surely laid, the economic efficiency can be improved, and floating can be prevented with good efficiency.

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, landfills 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, as shown in FIG. 2, air floats 2a are attached to the surface of the water-blocking sheet main body 1a, and the air floats 2a are filled with air and drawn out to the surface of the water to expand the air floats 2a. For example, a water-blocking sheet 3a is known that is torn to remove air, settle on the bottom of the water, and be laid.

However, the conventional water-blocking sheet 3a is
The air float 2a is integrally attached to the surface of the water-blocking sheet body 1a.

Therefore, the air float 2a is attached to the water-blocking sheet body 1.
Since it cannot be placed at the desired position of a, the air float 2a may have to be added separately during the laying, which complicates the laying work and requires an extra air float 2a, which is uneconomical. Is.

Further, the air float 2a has a water-blocking sheet body 1a.
If it is integrated with, it will be extremely difficult to handle, including storage and transportation, and the air float 2
There is a problem that a will be settled together with the water-blocking sheet body 1a and cannot be reused.

Further, if the air float 2a has a pinhole or a damaged portion, when it expands to the surface of the water, those portions sink and the laying work cannot be performed reliably, so that the entire waterproof sheet 3a is replaced. There is also the problem of having to.

[0011]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is that a conventionally known water-impervious sheet using an air float has a fixed installation location of the air float, which makes the installation work difficult. An extra air float is used, and it is extremely difficult to handle, including storage and transportation of the water-blocking sheet, and the air float cannot be reused. That is, when they are spread on the surface of the water, those parts settle down and reliable laying work cannot be performed.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the water-impervious sheet is mainly a water-impervious sheet body having an annular locking portion provided on the surface thereof. And a hollow column-shaped air float that is inserted into and held by the locking portion.

Further, in the method of laying a water-permeable sheet according to the present invention, mainly, a tubular air float is inserted and held in an annular engaging portion provided on the surface of the water-permeable sheet body to hold the water-permeable sheet body. After being floated on the surface of the water and floated on the surface of the water, the air float is removed as it is or after the air inside is removed, and the water-impermeable sheet body is settled and laid on the bottom of the water.

[0012]

[Function] By making the water-blocking sheet main body and the air float separate, storage and transportation are facilitated, and the air float can be recovered and reused during installation.

Further, it is possible to select a mounting position between the water impermeable sheet main body and the air float to improve work efficiency.

[0014]

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

FIG. 1 shows an 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 length of about 0 to 100 m, which is made of a vinyl chloride resin sheet having a reinforcing layer made of a braid, etc., if necessary, and a plurality of annular engaging portions 3 are arranged on the surface at appropriate intervals in the length direction. Length of waterproof sheet main body 2 and the locking portion 3
The air float 4 is held in the water-blocking sheet main body 2 by sequentially inserting it into the.

The locking portion 3 is a belt-shaped piece 5 made of the same material as the water-impervious sheet body 2 which is bent so that the end face has a substantially Ω shape with a predetermined length.
Both ends are fixed by an appropriate means such as sewing or welding to form an annular shape.

The air float 4 is made of the same material as the water-blocking sheet main body 2 or is made of the same material such as a rubber material having airtightness and flexibility, and is formed into a suitably long hollow cylindrical shape. A supply / discharge port 6 is provided.

In this embodiment having the above-mentioned structure, the air buoy 4 which is inflated by supplying air from the air supply / exhaust port 5 is inserted into and held by the engaging portion 3 in order, or is inserted and held in the engaging portion 3 in order. By supplying air to the air float 4 from the air supply / exhaust port 5 to inflate it, buoyancy is imparted to the water-impervious sheet main body 2 so that the water-impartable sheet main body 2 is floated on the water surface and floated. After the edges are joined to each other to cover most of the water surface, the air float 4 is left as it is, or the internal air is evacuated from the air supply / exhaust port 5, and the locking portion 3
The water-impermeable sheet body 2 is laid on the bottom of the water, etc.

In this embodiment, the impermeable sheet body 2 and the air float 4 are used.
Since it is formed as a separate body, it is extremely easy to handle, including storage and transportation. In particular, the water-impervious sheet body 2 and the air float 4 in which the locking portions 3 are formed according to the purpose of use and the place of use. Since different types and the numbers of the air floats 4 can be appropriately combined and used for and, it is economically advantageous because it is not necessary to use an extra air float 4.

Further, since the air float 4 and the water-blocking sheet body 2 are separated from each other, the air float 4 can be collected together with the water-blocking sheet body 2 at the time of laying, and can be recovered and reused. It is extremely economical.

Further, even if the air float 4 has a pinhole or a damaged portion, another air float 4 can be immediately used as a substitute, and the laying work is not hindered.

In this embodiment, the long air floats 4 are inserted into the plurality of locking portions 3 in sequence on the surface of the water-blocking sheet main body 2 at appropriate intervals in the length direction. Since it is configured to be held by the water-impervious sheet body 2 in this manner, the air float 4 is reliably held by the water-impermeable sheet body 2, and there is no concern that it will come off during installation.

Further, in this embodiment, since the engaging portion 3 and the air float 4 are made of an appropriately flexible vinyl chloride resin sheet which is the same material as the water-blocking sheet main body 2, the air float 4 Not to mention the deflated state,
Even in the air float 4 filled with air in advance, it can be easily and surely attached to and detached from the locking portion 3.

Therefore, the laying work can be carried out very easily and in a short time, but the air filled in the air float 4 can be removed even when the locking portion 3 does not have flexibility. By this, the air float 4 can be taken out from the locking portion 3 very easily, and when at least a part or all of the locking portion 3 can be expanded and contracted, the air float 4 can be attached and detached more easily. Is something that can be done.

Further, as shown in FIG. 1, when a plurality of air buoys 4 are used, the air buoys 4 are detached from the water-impervious sheet body 2 by connecting them by a connecting member 6 such as a short rope. It is possible to collect a plurality of air floats 4 collectively.

Furthermore, in the above-mentioned embodiment, the case where all the air floats 4 held by the water-blocking sheet main body 2 are removed, but the air floats 4 remove some or all of the internal air. It may be allowed to settle on the water bottom together with the water-blocking sheet body 2 as it is.

In addition, the air float 4 which has settled to the bottom of the water together with the main body 2 of the impermeable sheet is filled with a fluid heavy material such as cement slag or sand through the air supply / discharge port 5 so that the submerged sheet floats to the bottom of the water. It is possible to prevent the impermeable sheet 1 from rising.

In particular, according to this embodiment, the air float 4 can be attached to the desired position of the water-blocking sheet body 2.

Therefore, it is possible to arbitrarily select the mounting position of the air floats 4 preliminarily filled with the fluid weight to the water-blocking sheet main body 2, and it is possible to selectively remove only those air floats 4. It is possible to effectively prevent the floating by sinking it together with the water-blocking sheet body to the bottom of the water.

[0030]

According to the present invention having the above-mentioned structure, since the water-impervious sheet body and the air float are formed as separate bodies, the handling including storage and transportation is extremely easy.

In particular, it is said that different types, sizes and numbers of the water-impermeable sheet main body having the locking portions and the air floats can be appropriately combined and used according to the purpose of use and the place of use. Since it has an advantage and it is not necessary to attach an air float to an extra place, the laying work can be reliably performed and it is economically excellent.

Further, it is not necessary to settle all the air floats together with the main body of the water-blocking sheet at the time of laying, and all the air floats can be recovered so that the air floats can be reused.

Further, even if the air float has a pinhole or a damaged portion, the air float can be immediately replaced with another air float without hindering the laying work.

Furthermore, when at least a part of the engaging portion is extendable, the air float can be attached and detached more easily.

In addition, by filling the air floats settling on the water bottom together with the main body of the water blocking sheet with a heavy liquid material, it is possible to prevent the water blocking sheet submerged on the water bottom from rising. Also, since the air float can be attached to a desired position of the water shield sheet main body, it is possible to arbitrarily select the attachment position of the air float preliminarily filled with the fluid heavy object to the water shield sheet main body. By selectively submerging only the air float and submerging it into the water bottom together with the water-blocking sheet main body, it is possible to effectively prevent the floating.

[Brief description of drawings]

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

FIG. 2 is a perspective partial view showing a conventional example.

[Explanation of symbols]

 1 Impermeable sheet 2 Impermeable sheet body 3 Locking part 4 Air float

Claims (5)

[Claims] 1. A water-impermeable sheet comprising a water-impermeable sheet body having an annular locking portion on a surface thereof, and a hollow columnar air float inserted and retained in the locking portion. 2. The waterproof sheet according to claim 1, wherein the air float is capable of removing the air filled therein. 3. The water impervious sheet according to claim 1, wherein at least a part of the locking portion is capable of expanding and contracting. 4. A cylindrical air float is inserted into and held by an annular locking portion provided on the surface of the water-blocking sheet body to give buoyancy to the water-blocking sheet body and to be drawn out and floated on the water surface. A method of laying a water-impermeable sheet, characterized in that the air float is removed as it is or the air inside is removed and the body of the water-impermeable sheet is settled and laid on the bottom of the water. 5. A cylindrical air float is inserted into and held by an annular locking portion provided on the surface of the water-permeable sheet body to give buoyancy to the water-permeable sheet body to extend to the water surface, and then float. A method of laying a water-impervious sheet, comprising removing air in an air float to settle a water-impervious sheet body to be laid on a bottom of a water, and then filling the air float with a fluid heavy material.