JPS59141615A - Asphalt-layer structure - Google Patents

Abstract

PURPOSE:To facilitate the formation of an asphalt layer necessary for various civil construction works by injecting an asphalt into a bag made of a woven heat-resistant fiber cloth. CONSTITUTION:A bag is formed by sewing both end edge portions in the Y- direction of woven cloths A and B integrally woven with an interval W by using fillaments C in parallel with the Y-direction in a double woven fabric D in which the woven cloths A and B of a heat-resistant fibers are alternately woven with the fillament C at a given interval (l) and also by sewing the one end edge in the X-direction of the woven cloths A and B. The bag with an interval W suitable for a construction site is foled, delivered to a site, and extended, and hot molten asphalt is injected into the bag. Excellent workability can thus be exhibited in the water-sealing work for slope of dam, etc., and for foundation work, unequal settlement prevention work of tetrapots, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an asphalt layer structure for various civil engineering works, which prevents water stoppage on slopes in embankments, etc., and prevents uneven bottoming of tetrapods by preventing scouring of the lower surface of tetrapods. At the same time, the purpose is to facilitate the formation of an asphalt layer during water stoppage work, etc. in tunnels, cold regions, or reinforced concrete building construction.

Conventionally, water-stopping work for concrete structures involves layering several layers of asphalt felt or asphalt roofing on the foundation surface, and each time applying molten asphalt to the base to form a waterproof layer.

However, this method generally involves the complicated work of removing the concrete formwork, applying concrete surface treatment, removing the film on the concrete surface to be waterproofed, cleaning it to a clean surface, and then waterproofing. It's just funny, L
As 5'am thick asphalt felt or asphalt roofing is extremely long, if it is to be stretched on-site, the freight and man-hours required to transport it to the site will increase, and in some cases, transportation may be difficult. The disadvantage is that it is accompanied by restrictions. Furthermore, it is impractical to use vines to prevent scouring when installing tetrapods.

As a result of research to improve the various drawbacks of the conventional water stop construction work, etc., the present inventor has obtained an asphalt layer structure that can be easily constructed on site by having the structure described in the claims. I was able to do that.

That is, the present invention is an asphalt layer structure characterized in that molten asphalt is injected and filled into the inside of a bag obtained by weaving heat-resistant fibers.

The asphalt used in the present invention includes straight asphalt, flow asphalt, and natural asphalt, which are widely used for water stop construction, as well as putazoene rubber, styrene-butadiene rubber, natural rubber, inbutylene rubber, and various types of mixtures of two or more of these rubbers. Various types of rubber asphalt can be used.

In addition, the asphalt may be used as melting point lowering agents such as sulfur, various solvents such as light oil and double fuel oil, fillers such as lime powder, various stone powders, fly ash, aggregates such as fine sand, fine sand or iron sand, specific gravity adjusting materials, etc. can be mixed.

Furthermore, the heat-resistant fibers used in the present invention include various aromatic polyamide fibers, particularly aramid fibers (wholly aromatic polyamide fibers), various ceramic fibers, carbon fibers, silicon carbide fibers, and the like.

Figures 1 to 3 show an example of a bag obtained by weaving the above-mentioned heat-resistant fibers. Connecting the thread C
The threads C are made of a double-woven fabric in which woven fabrics A and B are woven together in parallel in the Y direction, and the threads C are made of woven fabrics A and B separated by a certain distance l, respectively, as shown in FIGS. 2 and 3. The woven fabrics A and B10) Y
Both ends in the direction and one side in the X direction are stitched together to form a bag. In this case, woven fabric A and woven fabric B
The size of the woven fabrics A and B, the distance W between the two woven fabrics A and B, and the constant spacing of the threads C that are alternately woven into the two woven fabrics A and B at a constant interval 1, etc., may be determined depending on the purpose or filled. It can be appropriately selected and formed depending on the properties of the asphalt to be used.

In the present invention, molten asphalt is injected and filled into the bag, and the bag is prepared in advance with a gap W suitable for the work site, and the bag is folded and transported to the site.

On the other hand, at the site, a predetermined amount of asphalt is heated and melted according to a conventional method, and the bag is expanded to a predetermined area, and the heated and molten asphalt is injected and filled from the mouth of the bag.

The bag of the present invention has a melting temperature of asphalt, i.e. 16
0-2L1. Since it is made of heat-resistant fibers that can withstand OoC, even if the bag is injected with molten asphalt, the bag will not break at all and the molten asphalt can be smoothly injected and filled.

In addition, to inject and fill molten asphalt into a bag, insert multiple injection nozzles from the bag mouth to near the bottom of the bag.
If molten asphalt is simultaneously injected from the plurality of injection nozzles t) and the injection nozzles are gradually retreated toward the mouth of the bag, the molten asphalt can be filled into the inside of the bag without any gaps.

In the present invention, by expanding a bag over the part forming asphalt l[i and injecting and filling it with molten asphalt, the asphalt and the bag are integrated, and can be reliably brought into close contact with a predetermined part. It can be easily applied to any shape of terrain, such as terrain or slopes, and there is no risk of water-stopping effects or tetrapod inequalities, and it is much more effective than conventional asphalt layer formation. Moreover, when forming the asphalt layer, no pretreatment as in the conventional method is required, resulting in excellent workability.

Furthermore, if the molten asphalt filled inside the bag bleeds from the cloth surface of the bag, sand or the like may be sprinkled thereon as appropriate.

Furthermore, since molten asphalt is used in the present invention, there is no outflow of strong alkalis, etc. Therefore, even when used for embankments, underlaying tetrapods, etc., there is no problem of pollution caused by the outflow of strong alkalis.

As described above, the present invention can easily form an asphalt layer that can be closely attached to various types of terrain such as water stoppage work for embankments, reinforced concrete buildings, etc., or underlaying tetrapods,
It also has excellent workability on site, and there is no pollution, which is a great benefit for civil engineering and construction work.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of essential parts of an example of a bag used in the present invention;
The figure is a sectional view taken along the line nu in Figure 1, and Figure 3 is a cross-sectional view taken on the line III in Figure 1.
-IIIm sectional view. A, 13: Woven fabric, C: Yarn, D=Double woven fabric.

Claims (1)

[Claims] An asphalt layer structure characterized in that asphalt is injected and filled inside a bag obtained by weaving heat-resistant fibers.