JPH0336363B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an undulating weir made of a flexible membrane material such as rubber-coated cloth.

(Prior art) There is an undulating weir made of a flexible material such as a rubber-coated cloth, which is made of a flexible membrane material 1 such as a rubber-coated cloth, in which air or water 3 is introduced into a hollow body or envelope and expanded to form an undulating weir. (For example, see Special Publication No. 40-11702 and Special Publication No. 44-2371).
This has a structure as shown in FIG. 4a, and is made of a membrane material as shown in FIG. 4b. That is, a fabric 5 made of nylon, polyester, or the like is coated with rubber 4 or the like to form an airtight and watertight flexible membrane material. In FIG. 4, 2 is a mounting bracket, 10 is a floor of a river, etc., and 11 is a flow of a river, etc.

(Problems to be Solved by the Invention) The problem with this undulating weir made of flexible membrane material such as rubber-coated cloth is that the membrane material is susceptible to damage from the outside. It is easily damaged by rolling stones, driftwood, and human damage. For this reason, there is a desire for a weir that is resistant to such external damage.

In view of the above, the present invention provides an undulating weir that satisfies such demands.

(Means for Solving the Problems) That is, the present invention provides an undulating weir made of a flexible membrane material such as a rubber-coated cloth similar to the conventional one, in which the outer surface, inner surface, or intermediate layer of the flexible membrane material used as a covering is A sheet-shaped, tile-shaped, or block-shaped water absorbing body made of a super absorbent resin or a mixture of a super absorbent resin, rubber, or plastic is provided. Of course, it can be provided on the entire surface of the flexible membrane material,
It may be one area. In the above, the water-absorbing body provided in the envelope may be one that has been swollen by absorbing water in advance, or may be swollen by absorbing water afterwards.

The present invention will be described in detail below with reference to the drawings.

The water absorbent material is made of a super absorbent resin or a mixture of a super absorbent resin and rubber or plastic, which will be described later.

FIG. 1 shows an example in which the water-absorbing sheet is provided on the outer surface of a flexible membrane material. Since the water-absorbing sheet 6 generally has difficulty adhering to a flexible covering material such as rubber-coated cloth, as shown in FIG. 1a, an additional layer of rubber or Either a covering flexible membrane material 7 made of rubber-coated cloth or the like is provided and mechanically sandwiched therebetween, or a rectangular sheet of similar rubber or rubber-coated cloth is provided on the outer surface as shown in Fig. 1b. The covering flexible membrane material 7 is adhered at its end to the outer surface of the covering flexible film material, and a tile of the water-absorbing sheet is placed between the rectangular sheet and the outer surface of the covering flexible film material. 6 and install it.

FIG. 2 shows the water-absorbing sheet 6 provided on the inner surface (inner side of the weir) of the flexible membrane material 1 that covers it. The method of providing the water-absorbing sheet is the same as that provided on the outer surface of the flexible membrane material.

FIG. 3 shows a case in which it is provided in the middle layer of a covering flexible membrane material such as rubberized cloth. In this case as well, it is provided in the same way as on the outer and inner surfaces of the flexible membrane material that is the covering, but when it is provided on the intermediate layer,
Substantially, the membrane material, for example, rubberized cloth, has a double structure.

Note that the same reference numerals in FIGS. 2 and 3 as in FIGS. 1 and 4 represent the same parts.

The superabsorbent resin in the present invention is one that absorbs water and swells by several times or more, preferably several tens of times or more in volume when immersed in water, such as: Copolymers, such as copolymers of isobutylene and maleic anhydride ○ Acrylic oxygen polymer ○ C Acrylonitrile grafted onto starch and hydrolyzed ○ 2 Copolymers of vinyl acetate and vinyl alcohol ○ E Modified polyvinyl alcohol with carboxylic acid These can be used alone, but in order to provide appropriate strength and flexibility, super absorbent resin and rubber,
Or they may knead plastic together.

(Function) In the present invention, by providing a water absorbing body,
Prevents damage from rolling stones (has the same effect as using a sponge). Also, even if it is poked or cut with a sharp tip or knife-like object, the water absorbing material prevents or reduces damage. Furthermore, since a water-absorbing body is used, if there is a covering membrane material on the outside of the water-absorbing body or a covering membrane material that blocks water, it is possible to damage it and make a hole in the covering membrane material. If water enters the wound, the water-absorbing material in the wound (which does not necessarily absorb water and swell indefinitely) swells more and more, making the wound smaller or sealing it by itself.

(Effects of the Invention) The present invention as described above has the following effects.

Excellent safety.

Since a water absorbing body is provided in the envelope, damage caused by rolling stones can be prevented. It can also prevent damage caused by external forces such as poking or cutting.

The construction method is easy to manufacture.

If a water absorber is provided on the outer or inner surface, it can be provided before or after installing the weir. If it is installed after the weir is installed, it can be constructed without much difference from conventional construction methods.

It's cheap.

If the swelling ratio of the water absorbent is increased, for example, a mixture of rubber and super absorbent resin with a ratio of about 50% each will expand about 10 times, so the actual amount of material can be reduced, and the remaining bulk can be made up of water. Can be done.

[Brief explanation of the drawing]

Figures 1a and b, Figures 2 and 3 are all diagrams for explaining the undulating weir made of flexible membrane material of the present invention, and Figures 1a and b cover a water absorbent body. Figure 2 shows the case where the water absorbent body is provided on the outer surface of the membrane material, and Figure 3 shows the case where the water absorbent body is provided on the middle layer of the membrane material that envelops it. ing. FIGS. 4a and 4b are explanatory diagrams of a general undulating weir made of a flexible membrane material, with FIG. 1...Flexible membrane material for enveloping, 2...Mounting metal fittings,
3... Air or water, 4... Rubber, 5... Fabric, 6... Water absorbing material, 7... Covering membrane material, 10...
...Bed of a river, etc., 11...Flow of a river, etc.

Claims (1)

[Scope of Claims] 1. A covering made of a flexible membrane material such as rubberized cloth is attached to at least the floor of a river, etc. in a direction that crosses the flow of the river, etc., and air or water is introduced into the covering. In an inflatable undulating weir, a sheet, tile, or block made of a super absorbent resin or a mixture of a super absorbent resin and rubber or plastic is used on the outer surface, inner surface, or intermediate layer of the flexible membrane material used as the envelope. 1. An undulating weir made of a flexible membrane material, characterized in that a water absorbing body of the shape of a shape is provided in at least a part of the envelope. 2. A water-absorbing body is made into a tile-like shape of an arbitrary shape, and the water-absorbing body is sandwiched between a flexible membrane material that covers it and another flexible membrane material that covers it. The undulating weir made of a flexible membrane material according to claim 1, wherein the end portion of the membrane material is fixed to the surface of the covering flexible membrane material to form a bag shape.