JPH068521B2 - Snow melting prevention structure at ski resort - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an artificial ski used outdoors in a relatively warm area, as well as a natural ski resort or an artificial ski used in a cold area during warm weather. The present invention relates to a snowmelt prevention structure for snow on ski slopes and ski slopes.

[Conventional technology]

In recent years, artificial ski resorts and natural ski resorts have been planned in various places due to an increase in leisure orientation. In addition to using natural snowfall, these ski areas produce artificial snow with ice generated by freezing means and other means when there is no snowfall, and spray this artificial snow on the slopes of the ski area to accumulate snow. Is. Conventionally, the ski slopes of these ski resorts have prepared natural ground or artificial snow by grounding the ground and planting grass or grass directly on the ground.

[Problems to be Solved by the Invention]

However, at ski resorts located in relatively warm regions (for example, west of Kansai) or ski resorts used in cold regions in cold regions, snow was accumulated due to the geothermal heat of the ground, especially before and after the cold season. The snow easily melts, which makes it difficult to obtain snowfall suitable for skiing, and there is a problem that the open period of the ski area is shortened in the natural ski area. Similarly, in artificial ski resorts, it is necessary to frequently produce artificial snow and spray it on the slopes in order to ensure a sufficient snow cover height against snowmelt due to the geothermal heat of the slopes, which increases running costs. There was a problem that caused it.

[Means for Solving the Problems]

This invention solves the conventional problems and blocks the heat transfer of the geothermal heat of the ground of the slope to the snow, and quickly permeates the water generated by the snow melting due to the outside air temperature and solar heat into the ground of the slope, An object of the present invention is to provide a snow melting prevention structure for a ski resort that can extend the skiable period by draining water and can reduce the running cost for manufacturing and spraying artificial snow in the artificial ski resort. It is a thing.

[Means for Solving the Problems]

In order to achieve the above object, in the snow melting prevention structure of a ski resort of the present invention, a water permeable heat insulating material 2 is laid on the ground 1 of the slope, and the upper surface of the water permeable heat insulating material 2 is made of synthetic fibrous nonwoven fabric 3. To cover.

In addition, the impermeable heat insulating material 4 is laid on the ground 1 of the slope,
The impermeable heat insulating material 4 is provided with a large number of drainage grooves 6 or drain holes extending from the upper surface to the lower surface of the heat insulating material, and the upper surface of the water impermeable heat insulating material 4 is a plate-like drain mat 5 having water permeability. The above object can also be achieved by coating with.

[Action]

Even in a relatively warm area or a cold area, the ground has a high latent heat in a warm season, and the ground heat is much higher than the outside temperature before and after the cold period (early winter or early spring).
Therefore, the snow accumulated on the ground is melted by the geothermal heat. The degree of snow melting due to this geothermal heat is large, and in the mountainous area of Kyushu, for example, there are two types of snow melting due to outside temperature and solar heat.
It is estimated that it will more than double.

According to the present invention, by laying a heat insulating material on the ground 1 of the slope, the heat of the ground is prevented from being transmitted to the snow.
However, if only the heat insulating material is laid, water generated by snow melting due to factors other than geothermal heat (outside temperature, solar heat) will accumulate in the lower part of the snow cover and will promote snow melting when flowing down the slope. , It is necessary to promptly drain the water due to these factors and separate the water from the snow.

Therefore, in the case of the first invention, the water-permeable insulating material 2 is laid,
This is covered with a synthetic fiber non-woven fabric 3, and the snow-melting water filtered by the non-woven fabric 3 is permeated through the water-permeable heat insulating material 2 and permeates into the ground 1 to be drained.

In the case of the second invention, the impermeable heat insulating material 4 such as foamed styrene, which is inexpensive to manufacture, is laid, and the impermeable heat insulating material 4 is used.
A drainage groove 6 or drainage hole extending from the upper surface to the lower surface of the heat insulating material is provided, and the snowmelt water collected by the plate-shaped drainage mat 5 laid on the impermeable heat insulating material 4 is used as the drainage groove 6 or the drainage hole. Permeate into the ground 1 and drain.

〔Example〕

 The present invention will now be described in detail with reference to the illustrated example.

1 and 2 show a snow melting prevention structure for a ski resort according to an embodiment of the first invention, in which a large number of block-shaped water-permeable heat insulating materials 2 are provided on the ground 1 of the ski slope. Synthetic fiber non-woven fabric 3 is laid over the upper surface of each water permeable heat insulating material 2, and a large number of nail-shaped fixtures 8 are arranged.
Is driven into the ground 1 by penetrating the non-woven fabric 3 and the water permeable heat insulating material 2, the non-woven fabric 3 is fixed to the water permeable heat insulating material 2 by the fixing tool 8, and the water permeable heat insulating material 2 is ground. It is fixed to 1 in a stable state.

The water permeable 2 not only thermally shields the snow from the ground heat of the slope, but also allows the water generated when the snow is melted by factors other than the ground heat (outside temperature, solar heat, etc.) to quickly penetrate into the ground 1 of the slope. For the purpose of draining water, the water permeable heat insulating material 2 is, for example, a block formed by adhering granular Styrofoam so as to form a gap and having a thickness necessary for heat insulation. A large number of the block-shaped water-permeable heat insulating materials 2 are laid on the ground 1 of the slope.

If solid matter such as earth and sand or dust contained in the snowmelt water enters the gap of the water permeable heat insulating material 2 as it is, it causes clogging.
In the first invention, the upper surface of the water permeable heat insulating material 2 is covered with a non-woven fabric 3 made of synthetic fiber, the non-woven fabric 3 has a role of a filtering function, and a large number of block-shaped water permeable heat insulating materials are laid out. The material 2 is fixed in a stable state by the fixture 8 and the nonwoven fabric 3.

The nonwoven fabric 3 may be fixed to the water permeable heat insulating material 2 with an adhesive. Further, it is preferable that the head of the fixture 8 does not protrude from the upper surface of the nonwoven fabric 3.

3 and 4 show a snow melting prevention structure for a ski resort according to an embodiment of the second invention, in which a large number of block-shaped impermeable heat insulating materials 4 are provided on the ground 1 of the ski slope.
Impermeable water-insulating heat insulation 4 adjacent to each other
The gap between the two forms the drainage groove 6, and the water-permeable joint material 9 having water permeability is sandwiched between the side faces of the adjacent water-impermeable heat-insulating materials 4, and the water-permeable water is spread over the upper surface of each water-impermeable heat-insulating material 4. A plate-shaped drainage mat 5 made of a conductive material is laid, and a large number of nail-shaped fixtures 8 penetrate the drainage mat 5 and the water-impermeable heat insulating material 4 and are driven into the ground 1. Thus, the drainage mat 5 is fixed to the water impermeable heat insulating material 4, and the water impermeable heat insulating material 4 is fixed to the ground 1 in a stable state.

As the water-impermeable heat insulating material 4, it is possible to use an inexpensive styrene foam product, and since the water impermeable heat insulating material 4 has no gap for water permeability, the water impermeable insulating material 2 is used.
The heat insulation efficiency is higher than that of the heat insulation material, and thus the thickness of the heat insulation material can be reduced.

The plate-shaped drainage mat 5 is provided to filter and drain the snowmelt water 7. In the case of FIGS. 3 and 4, a loofah-shaped drainage mat formed by bonding bristles of rigid fibers with an adhesive is used. The drainage mat 5 is formed by bonding cloth materials 5B and 5C made of a nonwoven fabric of synthetic fibers or coarse cloth to the upper and lower surfaces of the water permeable intermediate layer 5A with an adhesive or the like. Also, as the water-permeable joint material 9, one having the same structure as the drainage mat 5 is used.

The drainage mat 5 may be fixed to the water impermeable heat insulating material 4 with an adhesive. Further, it is preferable that the head of the fixture 8 does not protrude from the upper surface of the drain mat 5.

With the above configuration, the snow accumulated on the drainage mat 5 is insulated against the geothermal heat of the slope by the impermeable heat insulating material 4, and factors other than the geothermal heat (outside temperature, solar heat, etc.)
The snowmelt water 7 generated when the snow is melted by the drainage mat 5
From the upper surface cloth material 5B into the intermediate layer 5A, then flows through the intermediate layer 5A, then passes through the lower surface cloth material 5C, and then through the water permeable joint material 9, and then in the ground 1 of the slope. Infiltrated water 7a is discharged to the water.

In this embodiment, a large number of block-shaped impermeable heat insulating materials 4 are laid out at intervals to form the drainage grooves 6, but the water impermeable heat insulating material 4 extends from the upper surface to the lower surface. Multiple drain holes may be provided therethrough.

As the water permeable heat insulating material 2, the water impermeable heat insulating material 4, the non-woven fabric 3 and the drainage mat 5 used in the present invention, any materials other than those shown in the above-mentioned examples may be used as long as they have the above-mentioned functions. Good.

FIG. 5 and FIG. 6 show another example of the drainage mat 5. The synthetic resin plate 10 is formed with a large number of protrusions 11 projecting upward, and is made of synthetic fiber nonwoven fabric or rough cloth. The cloth material 5B is laid over the top surface of each protrusion 11 and fixed by an adhesive, and a large number of drain holes 12 are provided in the flat plate portion of the synthetic resin plate 10 between the flat plate portion and the cloth material 5B. A water passage space 13 is provided.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

In a ski area used in a relatively warm area, a natural ski area, or a ski area used in a warm season in a cold area, a water-permeable heat insulating material 2 or a water impermeable heat insulating material 2 on the ground 1 of the slope. Since 4 is laid,
It is possible to prevent snow melting due to geothermal heat. Further, since water generated when snow is melted due to factors other than geothermal heat (outside temperature, solar heat, etc.) is promptly permeated into the ground 1 of the slope and drained, it is possible to prevent snowmelting of snow due to snowmelt water.

Therefore, especially before and after the cold season, snow accumulation suitable for skiing can be secured, so that the open period of the ski area can be extended at the natural ski area, and the artificial snow can be manufactured and sprayed at the artificial ski area. The running cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical perspective view showing a part of a snow melting prevention structure for a ski resort according to an embodiment of the first invention, and FIG. 2 is a vertical perspective view showing an enlarged part of FIG. 3 is a vertical perspective view showing a part of a snow melting prevention structure for a ski resort according to an embodiment of the second invention, and FIG. 4 is a vertical perspective view showing a part of FIG. 3 in an enlarged manner. FIG. 5 is a vertical sectional side view showing another example of the drainage mat,
FIG. 6 is a partially cutaway plan view thereof. In the figure, 1 is the ground of the slope, 2 is a water permeable heat insulating material,
3 is a synthetic fiber non-woven fabric, 4 is a water impermeable heat insulating material, 5 is a drainage mat, 5A is a water permeable intermediate layer, 5B and 5C are cloth materials, 6 is a drain groove, 7 is snowmelt water, 7a is seepage water, 8 Is a fixture, 9 is a water-permeable joint material, 10 is a synthetic resin plate, 11 is a protrusion, 12 is a drainage hole, and 13 is a water passage space.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kiyoji Shinohara 2-6-3 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (72) Inventor Motoaki Miyazaki 4-chome, Meguro-honmachi, Meguro-ku, Tokyo No. 7 (72) Inventor Hiroyasu Ogata 2-6-1, Namiki, Kanazawa-ku, Yokohama, Kanagawa Prefecture 402 (72) Inventor Yoshikatsu Tani 2-16-8, Yuyamadai, Kawanishi-shi, Hyogo Prefecture

Claims (2)

[Claims] 1. A water-permeable insulating material 2 is laid on a ground 1 of a slope, and an upper surface of the water-permeable insulating material 2 is made of synthetic fiber nonwoven fabric 3.
A snow-melting prevention structure for ski areas characterized by being covered with. 2. A water-impermeable heat insulating material 4 is laid on the ground 1 of the slope, and the water-impermeable water insulating material 4 is provided with a large number of drain grooves 6 or drain holes extending from the upper surface to the lower surface of the heat insulating material. A snow melting prevention structure for a ski resort, characterized in that an upper surface of the water impermeable heat insulating material 4 is covered with a water-permeable plate-shaped drainage mat 5.