JPS5828832Y2 - Waterproof/weed control sheet for slope protection - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a waterproof and weed-proof sheet used for the facing of reservoirs and the surface treatment of embankment slopes.

Traditionally, if the slopes of reservoirs or embankments are left unexcavated, there is a risk of them being destroyed by running water or rainwater.

To prevent this, it was considered to cover the construction slope with concrete or stone.

However, in this case, damage such as cracking and peeling occurs due to poor ground quality.

Attempts have been made to install flexible asphalt sheets, but weeds grow from below and break through the asphalt sheets, causing destruction.

Therefore, it is effective to use synthetic resin films such as polyethylene, polypropylene, and vinyl chloride as completely waterproof and weed-proof sheets, but since the films themselves are thin, they are not suitable for installation on slopes. Ta.

To solve this problem, a waterproof and weedproof sheet has been developed in which a synthetic resin sheet is laminated to the asphalt sheet.

Although this effect has been recognized to some extent, the pressure of underground water gushing out from the back side often causes the sheet to swell, deforming the surface on which it is laid, and causing damage.

In order to eliminate such damage to the laying surface, the inventor conducted extensive research and found that in addition to the conventional synthetic resin film, a polymeric sheet made of synthetic fiber non-woven fabric impregnated with asphalt, a foamed composite with continuous air permeability and water permeability was added. We have developed the sheet of the present invention, which is made by laminating and polymerizing resin sheets, and have succeeded in preventing blistering on the surface on which it is laid by allowing groundwater to penetrate into the foamed synthetic resin sheet and move downward.

The present invention will be explained below with reference to the accompanying drawings. Fig. 1 is a cross-sectional view of the waterproof and weedproof sheet S of the present invention, and Fig. 2 shows an example of construction.

1 is a synthetic resin film such as polyethylene, polypropylene, or vinyl chloride, and has a thickness of 0.1 to 0.
Use one with a diameter of about 5 mm.

2 is an asphalt sheet made of synthetic fiber non-woven fabric impregnated with asphalt, which has flexural strength and a thickness of 2 to 5.
A value of about mm is appropriate.

In adhering the two, a heat fusion method or an adhesive may be used.

Further, 3 is a foamed synthetic resin sheet having continuous ventilation holes and sufficient air permeability, such as a flexible urethane foam.

The thickness of this is approximately 3 to 5 mm.

Therefore, the total thickness of the waterproof and weedproof sheet S of the present invention is 6 to 10 mm.

In this use, the sheet S is laid on the embankment slope G with the foamed synthetic resin sheet surface 3 facing inside as shown in FIG.

Although the upper end of the embankment is not shown, it is fixed with stakes or the like in the usual manner.

Therefore, the surface that comes into contact with water is a waterproof nonwoven fabric sheet 2 impregnated with asphalt, providing complete waterproofness.

If spring water pressure were to be applied as shown by arrow A, in the case of conventional sheets, this water pressure would cause abnormal blistering, which could damage the sheet.

However, with the waterproof and weed-proof sheet S of this invention, the gushing water penetrates into the breathable and water-permeable foamed synthetic resin sheet and gradually moves downward, so that the sheet S does not bulge. The surface is flat.

Since the sheet S of the present invention has a synthetic resin film 1 interposed therein, it will not be pierced by the growth of weeds, making it suitable for waterproofing and waterproofing for reservoir facings and surface treatment of embankment slopes. It provides grass-based sheets.

[Brief explanation of the drawing]

Figure 1 shows a cross-sectional view of the waterproof and weedproof sheet of the present invention.
FIG. 2 is an embodiment diagram showing an example of construction. 1...Synthetic resin film, 2...Asphalt sheet made of synthetic fiber nonwoven fabric impregnated with asphalt, 3...Foamed synthetic resin sheet.

Claims (1)

[Scope of utility model registration request] An asphalt sheet 2 made of synthetic fiber non-woven fabric impregnated with asphalt and having an appropriate thickness is pasted on one side of a film 1 made of a synthetic resin material such as polyethylene, polypropylene, vinyl chloride, etc. as a reinforcing waterproof material, and a water-permeable film 1 is pasted on the other side. A waterproof/weedproof sheet for slope protection consisting of three layers of different materials by pasting a foamed synthetic resin sheet 3 of a certain appropriate thickness.