JP4322382B2 - Slope impermeable structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water shielding structure for a slope applicable to various waste disposal sites.
[0002]
[Prior art]
The following structure is known as a water-blocking structure for waste disposal sites.
1. A structure in which a clay layer or water-tight asphalt concrete layer with a predetermined thickness or more is formed under a water shielding sheet.
2. A multi-layered structure in which a protective layer is formed between double water-impervious sheets so that both sheets do not break simultaneously.
[0003]
[Problems to be solved by the invention]
On steep slopes with poor scaffolding, the work of connecting and inspecting the water-impervious sheet is extremely difficult, and in order to avoid damage due to the weight of the sheet, the sheet is forced to be fixed at predetermined intervals. It takes a lot of time and labor to lay water sheets.
In addition, in a structure in which a clay layer or a watertight asphalt concrete layer is rolled, workability on steep slopes is poor.
[0004]
The present invention has been made in view of the above points, and an object of the present invention is to provide a water-blocking structure for slopes excellent in workability and water-blocking performance.
[0005]
[Means for Solving the Problems]
In order to solve the problems as described above, the water-blocking structure of the slope according to the present invention is a slope water-blocking structure in which the slope is covered with a water-blocking sheet . A base sheet fixed along the unevenness, a foam film integrally formed with the base sheet, a foam protective layer integrally formed on the surface of the foam film, and a foam film integrally formed on the surface of the foam protective layer The foamed film and the foam protective layer are made of resin foam and are a composite that is foamed seamlessly on site.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
[0007]
<I> Foundation sheet laying work The foundation sheet 3 is laid and fixed while driving the pins 2 over the entire surface of the uneven slope 1.
The base sheet 3 includes, for example, non-woven fabrics having a thickness of about 5 mm to 20 mm, long fibers, short fibers, mesh materials, and the like.
[0008]
<B> Formation of first foamed film Next, the first foamed film 4 is formed on the surface of the base sheet 3.
The first foam film 4 is made of, for example, a resin foam foam (preferably a hard urethane foam) composed of closed cells whose curing speed is increased by a catalyst or the like, and is formed into a seamless sheet by on-site spraying or on-site foaming.
Since the first foamed film 4 is integrated with the base sheet 3 due to its self-adhesiveness, an adhesive and a joining member are not required separately, and the followability to the undulation of the slope 1 is good.
[0009]
<C> Lamination of foam protective layer A foam protective layer 5 having a predetermined thickness is formed by spraying resin foam or the like over the entire surface of the first foamed film 4 or foaming in situ.
By using the same type of resin foam as the first foam film 4 for the foam protective layer 5, both layers 4 and 5 are firmly integrated by self-adhesiveness.
[0010]
<D> A second foamed film 6 integrated with the foamed protective layer 5 is formed on the entire surface of the foamed protective layer 5 of the second foamed film by spraying resin foam foam or the like on site or by foaming in situ.
With the surface described above, a water shielding sheet 7 having a composite structure in which the foam protective layer 5 is interposed between the first and second foam films 4 and 6 and integrated is obtained.
The water shielding sheet 7 is integrated with the slope 1 through the base sheet 3 and the pins 2.
[0011]
The layer thickness and hardness of each of the foamed films 4 and 6 and the foam protective layer 5 are determined by appropriately selecting the type of catalyst, the amount of addition, and the like.
Further, the water shielding sheet 7 may be configured by laminating the foam protective layer 5 and the foam film as many as necessary on the surface of the second foam film 6.
[0012]
<E> Characteristics of the water-impervious sheet Since the conventional water-impervious work is to lay the sheet carried on site, in the present invention, the water-impervious sheet 7 is produced by foaming on-site. It can be formed in any size without any. Moreover, the thickness of the water shielding sheet 7 can be arbitrarily changed by selecting the foam thickness.
[0013]
【The invention's effect】
<I> Since the water-impervious sheet foams directly on the slope, there is no seam.
Therefore, the reliability with respect to water-stopping is significantly improved.
<B> Connection work of seams, inspection work of seams and rolling work are unnecessary.
Therefore, even if the slope is steep, construction can be performed efficiently.
In particular, the time and labor burden can be greatly reduced as compared with the conventional water shielding structure in which a heavy roll sheet is carried and laid on site.
<C> Since the water-impervious sheet is integrated with the slope and the weight of the sheet is dispersed and supported, and also follows the undulation of the slope, the water-impervious sheet is less likely to break during and after construction.
<D> Even if an abnormality occurs in a part of the water shielding sheet due to an external factor, it can be easily and reliably repaired by spraying a resin foam on the surface layer.
[Brief description of the drawings]
FIG. 1 is a front view according to Embodiment 1 of the invention.
DESCRIPTION OF SYMBOLS 1 Slope 2 Pin 3 Base sheet 4 1st foam film 5 Foam protective layer 6 2nd foam film 7 Water shielding sheet

Claims (1)

In the slope impermeable structure where the slope is covered with the impermeable sheet,
The water shielding sheet is
A foundation sheet that covers the slope directly and is fixed along the irregularities of the slope with pins;
A foam film formed integrally with the base sheet;
A foam protective layer integrally formed on the surface of the foam film;
It consists of a foam film formed integrally on the surface of the foam protective layer,
The foam film and the foam protective layer are made of resin foam foam, and are a composite that is foamed seamlessly on site,
Slope impermeable structure.

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