JP3588261B2 - Preservation structure of snow at ski resort - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for storing snow at a ski resort that stores a sufficient amount of snow for skiing for a long period of time.
[0002]
[Prior art]
In spring and summer, the temperature rises and snow melts easily, ending the ski season. For example, as shown in JP-A-61-222471, a conventional method for preventing snow melting is known. This method closes the slope ski area while significant snow layers remain on the ski slope, and when combined with the snow below, acts during spring, summer and fall, when temperatures are above freezing, during the fall. By the time of the snowfall, the first snow will be received, the first snow will be preserved, and the proper snow conditions will remain. After covering at least a portion of the slope with a layer of insulating material that has the property of limiting the rate of melting of residual snow, the temperature dropped to a temperature where the snow continued to be stored as a suitable root without the help of insulating material Later, the insulation sheet is removed from the snow covered area on the slope. The insulating sheet is a quilt containing sawdust, glass fiber, rock wool, and a small sheet of insulating board, the upper and lower surfaces of the quilting being covered with aluminum foil. On the other hand, Japanese Patent Publication No. 62-61721 discloses a snow melting control method for preventing snow melting by covering the snow surface with bubbles. In this method, the surface of snow is covered with an insulating sheet containing vinyl air bubbles in a sandwich manner between two vinyl sheets, so that snow melting can be suppressed by about 20%.
[0003]
[Problems to be solved by the invention]
However, the work of covering and removing the seat on snow at a ski area with a large area requires a great deal of energy and labor and equipment.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a snow-covering structure for a ski resort that easily and efficiently stores snow even on snow at a ski resort having a large area.
[0004]
[Means for Solving the Problems]
The snow storage structure of a ski resort according to the present invention is a heat insulating material comprising one or more of sawdust, hollow glass beads, shirasu balloon, perlite, silica powder, glass wool, silica-alumina powder, urethane foam resin powder, and styrene foam powder. One or more cryogens of sodium chloride, zinc chloride, ammonium chloride, potassium chloride, calcium chloride, sodium nitrate, and sodium sulfate are added to the heat insulating material layer (8, 10, 12) of the material powder (8, 10, 12). 10, 12), heat insulating material layers (8, 10, 12) are formed on the snow layers (9, 11), and the snow layers (9, 11) are thermally shielded from the outside.
[0005]
The specific heat insulating material powder can be easily sprayed on a ski area having a large area with a powder sprayer. With the use of said particular cryogen, the snow partially melts into water and the cryogen dissolves therein. At this time, the temperature gradually decreases due to the heat of melting of snow and the heat of melting of the cryogen (both endothermic). However, when the temperature reaches the eutectic point, melting stops and the temperature is kept constant, so that the snow cover can be stored efficiently.
[0006]
In another embodiment according to the present invention, a retaining wall (4) made of a heat insulating material disposed opposite to a side wall (3) of a concave portion (2) formed in the ground (1), and a surrounding portion of the concave portion (2). An aluminum foil mat (5) arranged on the ground and reflecting heat, and a drain pipe (7) formed at the bottom (6) of the recess (2) and draining snow-melted water may be provided. Geothermal heat is prevented by the retaining wall (4) of the heat insulating material, and the solar heat is reflected by the aluminum foil mat (5), so that the snow cover can be stored efficiently.
[0007]
A heat insulating material layer (8) is formed on a bottom (6) of a concave portion (2) formed in the ground (1) and on a side wall (3) formed to be inclined with respect to the bottom (6). A snow layer (9, 11) may be formed thereon, and a heat insulating material layer (12) may be further formed on the snow layer (9, 11). The snow layers (9, 11) and the heat insulating material layers (8, 10, 12) may be formed alternately, and the second heat insulating material layer (10) formed on the snow layer (9) may be formed. A snow layer (11) is formed, a third snow layer (13) is provided on the second snow layer (11), and a fourth snow layer is formed on the third snow layer (13) by snow removed from the road. May be formed.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention using a snow preservation structure for a ski resort will be described with reference to FIGS. 1 and 2. FIG.
As shown in FIG. 1, a snow storage structure for a ski resort according to an embodiment of the present invention has a recess 2 formed on the ground 1 and having a length of about 50 m and a height of about 3 m. A retaining wall 4 made of a heat insulating material is arranged facing the side wall 3 of the recess 2, and an aluminum foil mat 5 that reflects heat is arranged on the ground 1 around the recess 2. Geothermal heat is prevented by the retaining wall 4 made of heat insulating material, and solar heat is reflected by the aluminum foil mat 5, so that snow can be efficiently stored.
[0009]
In addition, a drain pipe 7 for draining snow-melted water is provided at the bottom 6 of the concave portion 2. In the recess 2, a first heat insulating material layer 8, a first snow layer 9 formed on the first heat insulating material layer 8, and a second heat insulating layer 9 formed on the first snow layer 9 A material layer 10, a second snow layer 11 formed on the second heat insulating material layer 10, a third heat insulating material layer 12 formed on the second snow material layer 11, and a third heat insulating material It comprises a third snow layer 13 formed on the layer 12 and a fourth snow layer 14 formed on the third snow layer 13. The height at which the third heat insulating material layer 12 and the third snow layer 13 overlap is about 2 m, and the fourth snow layer 14 is about 3 m. The first heat insulating material layer 8, the second heat insulating material layer 10, and the third heat insulating material layer 12 are all sawdust, hollow glass beads, shirasu balloon, perlite, silica powder, glass wool, silica-alumina powder, urethane foam. It is composed of one or more of resin powder and styrene foam powder. The first snow layer 9 and the second snow layer 11 carry and stack the snow or another place of snow, and the third snow layer 13 is a snow layer formed by normal snow and the fourth snow layer. The layer 14 can use snow removed from the road. As described above, since the first to third heat insulating material layers 8, 10 and 12 are formed below and above the first snow layer 9 and above the second snow layer 11, the first to third snow layers are formed. The layers 9, 11 and 13 can be completely thermally shielded from the outside. Further, the third snow layer 13 can be thermally shielded from the outside by the fourth snow layer 14. Furthermore, the heat insulating powder can be easily sprayed on a ski area having a large area with a powder sprayer. In this case, one or more cryogens of sodium chloride, zinc chloride, ammonium chloride, potassium chloride, calcium chloride, sodium nitrate, and sodium sulfate may be mixed into the heat insulating material layer. When the cryogen is used, the snow partially melts into water and the cryogen dissolves therein. At this time, the temperature gradually decreases due to the heat of melting of snow and the heat of melting of the cryogen (both endothermic). However, when the temperature reaches the eutectic point, the melting stops, and the temperature is kept constant, so that snow can be stored efficiently.
[0010]
FIG. 2 shows another embodiment of the present invention. As shown in FIG. 2, the same heat insulating material layer as described above is formed on the bottom 6 of the recess 2 having a length of about 50 m formed on the ground 1 and on the side wall 3 formed at an angle of about 30 degrees with respect to the bottom 6. 15, a first snow layer 9 and a second snow layer 11 are formed on the heat insulating material layer 15, and a third heat insulating layer is further formed on the first snow layer 9 and the second snow layer 11. The material layers 12 may be formed alternately. In this case, the height from the first heat insulating material layer 8 to the third heat insulating material layer 12 is about 3 m, and the height of the third snow layer 13 and the fourth snow layer 14 is about 2 m, respectively. 3 m.
[0011]
【Example】
[Example 1]
Sprinkled about 3 mm square sawdust powder to a thickness of about 1 cm with a powder sprayer on snow of about 50 cm to about 1 m thick that snowed on ski slopes where the minimum daytime temperature was around -1 ° C during April. did. Also, sawdust powder of about 3 mm square was sprinkled to a thickness of about 1 cm on the snow of about 20 cm of snowfall using a powder sprayer. At this ski resort, from late June to early July, skiers could fully enjoy skiing safely on sherbet-like snow with a thickness of about 30 cm to about 50 cm.
[0012]
[Comparative example]
In a ski resort equipped with the snow preservation structure of the ski resort shown in Example 1, in a place where sawdust powder is not sprayed, from late June to early July, the snow cover was about 5 cm to about 10 cm, so shrubs, stones, etc. I couldn't ski because of exposure and danger.
[0013]
[Example 2]
At the ski resort, from late June to early July, snow is stored up to the first snow layer 9 and the second snow layer 11 by the snow storage structure of the ski resort shown in FIG. Because of this, I was able to fully enjoy skiing safely on sherbet-like snow.
[0014]
[Example 3]
A preservative material was manufactured by mixing 60 parts of about 3 mm square sawdust, 20 parts of Shirasu balloon, 5 parts of sodium chloride, and 15 parts of sodium sulfate in total of 100 parts. The powder of each of the above-mentioned materials was sufficiently mixed with a Henschel mixer to produce a preservative.
[0015]
In a ski resort where the daytime minimum temperature is around -1 ° C. during April, the snow cover of the snow storage structure of the ski resort shown in FIG. The powder of the preservative material was sprayed on snow having a thickness of 40 cm to about 70 cm with a powder sprayer to a thickness of about 5 cm. In addition, the powder of the preservative was sprayed with a powder sprayer to a thickness of about 5 cm on snow that had about 15 cm of snowfall.
From late June to early July, the ski resort was able to fully enjoy skiing safely on sherbet-like snow with a thickness of about 20 cm to about 40 cm.
[0016]
【The invention's effect】
According to the present invention, preservation materials can be easily sprayed even on snow at a ski area having a large area, and snow can be efficiently stored. Therefore, it is possible to fully enjoy skiing safely from late June to early July. it can.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating an embodiment of a snow storage structure for a ski resort according to the present invention. FIG. 2 is a cross-sectional view illustrating another embodiment of a snow storage structure for a ski resort according to the present invention.
1. ground, 2. concave part, 3. side wall, 4. retaining wall, 5. aluminum foil mat, 6. bottom, 7. drain pipe, 8. first heat insulating material layer, 9 ..First snow layer, 10. second heat insulation layer, 11 second snow layer, 12 third heat insulation layer, 13 third snow layer, 14th. 4 snow layers,

Claims (5)

Sodium chloride, zinc chloride, ammonium chloride One or more cryogens of potassium chloride, calcium chloride, sodium nitrate, and sodium sulfate are mixed, a heat insulating material layer is formed on a snow layer, and the snow layer is thermally shielded from the outside. Preservation structure of snow at ski resort. A retaining wall made of a heat insulating material disposed opposite to a side wall of the concave portion formed on the ground, an aluminum foil mat disposed on the ground around the concave portion and reflecting heat, and water formed at the bottom of the concave portion and having melted snow. The structure for preserving snow at a ski resort according to claim 1, further comprising a drain pipe for draining water. A heat insulating material layer was formed on the bottom of the concave portion formed on the ground and a side wall formed to be inclined with respect to the bottom, a snow layer was formed on the heat insulating layer, and a heat insulating material layer was further formed on the snow layer. The snowfall storage structure for a ski resort according to claim 1. The snow storage structure of a ski resort according to any one of claims 1 to 3, wherein a snow layer and a heat insulating material layer are alternately formed. A second snow layer is formed on the heat insulating material layer formed on the snow layer, a third snow layer is provided on the second snow layer, and the third snow layer is formed by snow removed from the road. The snow-covering structure of a ski resort according to any one of claims 1 to 4, wherein a fourth snow layer is formed thereon.

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