JP2002206205A - Outdoor skiing ground and its forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor skiing ground on which the melting of snow is suppressed largely even under a plus temperature, snow having excellent sliding properties and superior quality can be maintained and the quickening of the time when a slope can be opened surely and an increase in customer collection by an enhancement in the quality of snow can be expected. SOLUTION: In the outdoor skiing ground, which has a backing layer formed by fixing in a heat exchangeable manner with a ground surface on the ground surface and a snow layer composed of natural snow and/or artificial snow laid on the backing layer and in which the melting of the snow layer is suppressed, the backing layer is formed by mutually adjoining and laying a large number of water-permeable packages in which a high water-absorbing polymer is introduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor ski resort and a method for forming the same.

[0002]

2. Description of the Related Art In recent years, due to warm winters, the natural snowfall season has been delayed year by year, and the number of cases in which snow does not fall by the winter holiday season when customers can be expected to increase most is increasing. Outdoor ski resorts are unable to accept reservations during the time when snow can be reliably secured and the slope can be opened, so the impact on the business is extremely large.

[0003] For this reason, many outdoor ski resorts employ artificial snowfall machines, and the number of places where artificial snowfall is used until natural snowfall is increased. Artificial snowfall machines are roughly classified into two types: a snow gun type or a fan type and an ice crusher (ICS). At first, relatively inexpensive snowgun type and fan type were the mainstream, but since snowmaking requires an environmental temperature of -3 to -5 ° C or less, the effectiveness is significant under recent circumstances. Has declined.

[0004] On the other hand, ICS is capable of snowmaking even at a plus temperature, and its use is increasing in recent years. However, ICS is a very expensive facility and requires a large amount of power for snowmaking. Therefore, when the amount of snowmelt is large, a large number of machines are required including replenishment, the cost is extremely high, and the time when snowmaking is possible is actually restricted. In addition, if the powder snow is made into a powdery snow with good snow quality, the amount of snowmelt increases, so that substantially only coarse ice particles can be formed, and there is a problem that the gliding property is unsatisfactory.

[0005] Conventionally, as an artificial snow or snow-like substance that does not melt, a highly oil-absorbing polymer containing a wax-like substance has been proposed (Japanese Patent No. 860783). (Japanese Patent Laid-Open No. 8-1)
No. 34438), none of them are inferior in sliding properties, the former has a stain due to wax adhesion, and the latter has a problem of safety when falling down, and there is no practical level.

FIG. 5 is an explanatory view schematically showing a cross section of a conventional slope at an outdoor ski resort. As shown in FIG. 5, a conventional outdoor ski resort 1 has a snow layer 3 made of natural snow and / or artificial snow directly on the ground 2. Factors affecting the melting of snow in the snow layer 3 include Q1 (heat conduction from air), Q1
3 (radiation) and Q3 (heat conduction from the ground). However, actually, snow melting by Q1 is small, and Q2
In order to prevent this, a sheet is put on the snow layer 3 to prevent this.

[0007] Among them, the melting of snow by Q3 is the largest. To prevent this, a cooling tool is installed on the ground 2 under the snow layer 3, or a lawn or the like is planted on the ground 2 to conduct geothermal heat. The amount of snowmelt is reduced by a certain amount. However, the method of installing the cooling tool is costly, is substantially indoor rather than outdoor, and there is no way to make it applicable to outdoor having a large area and low cooling efficiency. The method of planting a lawn or the like on the ground still has a large amount of snowmelt and is insufficient. Therefore, many outdoor ski resorts are struggling with such measures.

Therefore, the present inventors first spray the powder of the superabsorbent polymer on the ground 2 in the slope area using a blower, a powder pump, a truck with a moving drive, and the like, and spray an appropriate amount of water thereon. Thereby, the underlayer 4 is formed, and artificial snow (artificial snow or artificial ice by an artificial snowfall machine such as ICS, fan type, snow gun type, etc.) and / or
Alternatively, a method of laying natural snow to form a snow layer 3 has been proposed (Japanese Patent Application No. 2000-281504). According to this method, even if the snow layer 3 such as artificial snow or natural snow melts due to an increase in daytime temperature or the like, the base layer 4 formed using the superabsorbent polymer absorbs the water. For example, the snow quality of the snow layer 3 is favorably maintained due to, for example, the solid snow becoming tight snow. But blowers, powder pumps,
When the powder of the superabsorbent polymer is sprayed on the ground 2 in the slope area using a carriage with a driving drive for movement, the powder of the superabsorbent polymer is scattered, thereby lowering the efficiency and causing a problem that the powder cannot be uniformly sprayed. In addition, there is a risk that the powder of the superabsorbent polymer may flow out after a large amount of rainfall or after the snowmelt in the early spring. Was.

[0009]

Therefore, the first aspect of the present invention
The purpose of this outdoor ski resort is to solve the conventional problems, significantly suppress the melting of snow even under positive temperatures, and secure and maintain good-sliding, high-quality snow. It can be expected to increase the number of customers by early opening of reliable opening time and improvement of snow quality, and it can save resources and energy for snowmaking, reduce costs by reducing the amount of work, and spray equipment. The underlayer can be easily formed evenly without the need for a layer, and there is no problem of the underlayer flowing out even after heavy rainfall or snow melting in early spring, and the underlayer can be easily collected and reused during the off season. It is to provide an outdoor skiing area equipped with: A second object of the present invention is to provide a forming method capable of easily forming such an outdoor ski resort.

[0010]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to solve the above-mentioned problems, and as a result, a water-permeable package containing a superabsorbent polymer has been placed adjacent to each other on the ground. It was found that the melting of the snow layer can be easily and significantly suppressed by fixing the ground layer formed by laying many layers and providing a snow layer made of natural snow or artificial snow on this ground layer. The invention has been completed.

[0011] That is, the outdoor ski resort according to the first aspect of the present invention comprises an underlayer formed on the ground so as to be able to exchange heat with the ground, and natural snow and / or laying on the underlayer. An outdoor ski resort comprising a snow layer made of artificial snow and suppressing melting of the snow layer, wherein the underlayer comprises a plurality of water-permeable packages containing a superabsorbent polymer therein adjacent to each other. It is characterized by being laid and formed.

[0012] The outdoor ski resort according to claim 2 of the present invention,
The outdoor ski resort according to claim 1, wherein the superabsorbent polymer is a superabsorbent polymer that maintains independent particles even in a water-retained state.

[0013] The outdoor ski resort according to claim 3 of the present invention,
The outdoor ski resort according to claim 1 or 2, wherein the superabsorbent polymer after water absorption is frozen.

The outdoor ski resort according to claim 4 of the present invention,
The outdoor ski resort according to any one of claims 1 to 3, wherein the water-permeable package has a strength enough to withstand handling and has a degree such that the superabsorbent polymer contained therein does not leak to the outside. It is characterized by being formed of at least one material selected from a woven fabric, a nonwoven fabric, a net, a porous sheet and the like having an opening.

[0015] The outdoor ski resort according to claim 5 of the present invention,
The outdoor ski resort according to claim 1, wherein the water-permeable package is a bag-like material.

[0016] According to a sixth aspect of the present invention, there is provided an outdoor ski resort.
The outdoor ski resort according to any one of claims 1 to 5, wherein the water-permeable packages are fixed to each other by an auxiliary tool, or fixed to the ground by an auxiliary tool, or by an auxiliary tool. It is characterized by being fixed to each other and fixed to the ground by an auxiliary tool.

A seventh aspect of the present invention is to lay a large number of water-permeable packages containing a superabsorbent polymer on the ground adjacent to each other so as to be heat-exchangeable, and then spray water. Water is supplied from the outside to the inside of the water-permeable package to make the superabsorbent polymer absorb water to form an underlayer, and then natural snow and / or artificial snow is laid on the underlayer. And forming a snow layer.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view schematically showing a cross section of a slope of an outdoor ski resort according to the present invention. FIG. 2 is an explanatory diagram illustrating a partially permeable cross section of a water-permeable package containing a superabsorbent polymer. As shown in FIG. 1, an outdoor ski resort 1A of the present invention comprises a plurality of water-permeable packages 42 each having a superabsorbent polymer 41 inside the ground 2 laid adjacent to each other on the ground 2. There is an underlayer 4 fixed and fixed to allow heat exchange, and a snow layer 3 made of natural snow and / or artificial snow is formed on the underlayer 4.

As shown in FIG. 2, a highly water-absorbing polymer 41 is placed inside the water-permeable package 42, and the water-permeable package 42 is opened, broken or broken. The superabsorbent polymer 41 is tightly packaged so that it does not spill, stick out, or be released outside from the main body. A large number of the water-permeable packages 42 are laid on the ground 2 adjacent to each other and fixed so as to be able to exchange heat with the ground 2 and fixed to form the base layer 4, so that the superabsorbent polymer 41 is sprayed. A device or the like is not required, and a uniform underlayer 4 can be easily formed. In addition, even after a large amount of rainfall or snowmelt in early spring, the superabsorbent polymer 41 put in the water-permeable package 42 of the underlayer 4 flows out. And the maintenance of the underlayer 4 is easy. In the off season, the water-permeable package 42 can be collected and reused easily.

An underlayer 4 fixed so as to be heat-exchangeable with the ground 2 can store cold heat at night, and the underlayer 4 provided with cold heat can be used when the air temperature rises during the day.
The melting of the snow layer 3 can be suppressed as much as the heat caused by (heat conduction from air) and Q2 (radiation) is absorbed.

Since the melting of the snow layer 3 is greatly affected by the geothermal energy Q3, the underlayer 4 having a large heat storage capacity and a high heat insulating property has a large effect and can reduce the amount of snow melting. Therefore, even under a plus temperature, the melting of snow can be greatly suppressed, and good-sliding, high-quality snow can be secured and maintained. In addition, it is possible to save resources and energy related to snowmaking, and to reduce costs by reducing the amount of work.

The superabsorbent polymer 41 used as a material for forming the underlayer 4 absorbs a large amount of water having a high heat storage amount and maintains a water retaining state without disappearing like snow even when the temperature rises. If a large number of water-permeable packages 42 containing a superabsorbent polymer 41 are fixed on the ground 2 and laid in large numbers, the base layer 4 can be retained during the season, and the effect is maintained.

The superabsorbent polymer 41 absorbs a large amount of water, has a large ability to store cold heat at night, and has a heat insulating property, so that it has a great effect of preventing snow melting when the temperature rises in the daytime.
Further, the superabsorbent polymer 41 placed inside the water-permeable package 42 keeps a water-retaining state even when the temperature rises. Can be maintained continuously.

Highly water-absorbing polymer 41 which has absorbed a large amount of water
The base layer 4 composed of the water-permeable package 42 in which
If it is completely frozen at night, the effect of storing cold heat is greater. The thickness of the underlayer 4 is not particularly limited, but may be, for example, about 4 to 5 cm or more.

The superabsorbent polymer used in the present invention includes starch-based, cellulose-based or synthetic resins such as polymers such as acrylamide, acrylic acid, acrylate, methacrylate, styrene and vinyl ether, copolymers and terpolymers. System.

Some superabsorbent polymers are water-soluble and become glue-like or flake-like, crushed or granular when water is absorbed, and any of these can be used in the present invention. .

The superabsorbent polymer having a flake shape includes:
Specifically, an aqueous solution of a monomer containing acrylic acid and an ammonium salt or an alkali metal salt of acrylic acid is added to an aqueous solution of 0.1.
1-10% by weight of a polyvalent organometallic ion crosslinking agent is added to form an aqueous solution, which is then polymerized and dried, and a moderately crosslinked superabsorbent polymer obtained by drying, or an ammonium salt or an alkali metal salt of acrylic acid and acrylic acid. Moderately crosslinked superabsorbent polymer obtained by post-crosslinking a copolymer of the above with 0.1 to 10% by weight of a polyvalent organometallic ion crosslinking agent.

Examples of the superabsorbent polymer having a crushed or granular form include a method in which the above superabsorbent polymer is pulverized and processed into a predetermined particle shape, and a method in which the superabsorbent polymer is polymerized or condensed from a raw material compound of the above superabsorbent polymer. Examples include a method of forming a polymer compound in the form of a spherical or granular polyacrylate obtained by reverse-phase suspension polymerization in an organic solvent, a vinyl alcohol-acrylate copolymer or isobutylene. Even if water is absorbed such as a superabsorbent polymer (for example, an average particle size of about 0.005 to 5 mm) obtained by a method of saponifying a copolymer with maleic anhydride, the particles maintain non-tacky properties with each other. Things can be mentioned.

The superabsorbent polymer which can be used in the present invention may be any known superabsorbent polymer as described above, and the shape (granular, flake, amorphous, etc.) and particle size of the superabsorbent polymer Or the state when frozen (snowy ~ icy ~
The properties such as plate shape) are not particularly limited. However, the superabsorbent polymer, in which the particles are non-adhesive to each other in a water-retained state and can maintain independent particles, contains a large amount of air between the particles. Further, in order to reduce the amount of the superabsorbent polymer used from the viewpoint of economy, a superabsorbent polymer having a water absorption capacity of 50 times or more can be preferably used.

For example, in a place where there are many cases of freezing at night, a highly water-absorbing polymer having an ice-like shape having a higher heat storage capacity is provided. It is desirable to select a superabsorbent polymer that is more suitable for local environmental conditions, such as a superabsorbent polymer that easily contains a lot of air.

Specific examples of the ice-like superabsorbent polymer having a high heat storage capacity include, for example, a water absorption capacity of 200 times or more,
And the bulk density is high, for example, while the ordinary superabsorbent polymer has a bulk density of about 0.5 to 0.7,
One having a bulk density of 0.9 can be mentioned. When a superabsorbent polymer having a high water-absorbing ability and bulk density absorbs water and freezes, the frozen particles are interconnected to form a hard ice that is integrated as a whole.

The water-permeable package 42 shown in FIG. 2 is water-permeable and does not release the superabsorbent polymer 41 put inside by opening or opening the bag, and is easy to handle. It is necessary to have a strength that does not break the bag when handling or laying on the ground 2. The water-permeable package 42 is preferably light in weight because it is easy to handle, and low-cost because it is used in large quantities. Specific examples of such a water-permeable package 42 include a woven fabric, a nonwoven fabric, a net, and the like, which have strength enough to withstand handling and have openings so that the superabsorbent polymer 41 put inside does not leak outside. Examples thereof include sandbags, nonwoven fabric bags, porous sheet bags, mesh bags, net bags, bales, mucilions, etc., which are formed of at least one material selected from porous sheets and the like.

The material of the water-permeable package 42 may be plastic such as polyolefin or polyester, metal such as steel, or natural fiber such as hemp, jute, straw or cotton, and is not particularly limited. Since it has strength and is inexpensive, it can be preferably used.

The superabsorbent polymer 41 placed in the water-permeable package 42 does not scatter or flow when laying, using, or collecting. The use of the water-permeable package 42 containing the superabsorbent polymer 41 allows the base layer 4 that can be maintained uniformly and stably to be formed efficiently and easily. The aqueous package 42 can be easily collected and reused.

The superabsorbent polymer used in the present invention is used for agricultural purposes as a soil conditioner, and its safety has been confirmed in various tests. Therefore, there is no problem in safety. It is an environmentally friendly material that does not accumulate due to photodegradation or biodegradation.

However, the water-absorbent polymer 4 having the superabsorbent polymer
If the superabsorbent polymer is used without being placed in the room, it takes a certain period of time for the superabsorbent polymer to decompose off-season, such as after the thaw, May degrade the appearance and the effect on the environment may not be negligible. However, as in the present invention, the superabsorbent polymer 41 is contained in the water-permeable package 42.
The problem can be avoided by using the.

Since an aqueous solution obtained by dissolving a water-soluble superabsorbent polymer in water also has a high heat storage capacity, the combined material obtained by absorbing, holding, and supporting this aqueous solution in a cotton-like or sponge-like material is passed through the water-permeable package 42. It can also be used to form the underlayer 4.

Next, a method of forming the underlayer 4 using the water-permeable package 42 containing the superabsorbent polymer 41 will be described. As shown in FIG. 3, a large number of water-permeable packages 42 each having a superabsorbent polymer 41 therein are laid on the ground 2 so as to be adjacent to each other.
And fixed to each other with an auxiliary tool 44 for fixing between the water-permeable packings 42 so as to be heat-exchangeable with the ground 2. Then, water is supplied from the outside to the inside of the water-permeable packing body 42 by, for example, spraying water to make the superabsorbent polymer 41 absorb water, thereby forming the underlayer 4.

Instead of spraying water, a water-permeable package 42 in which a superabsorbent polymer 41 previously absorbed with an appropriate amount of water having a water absorbing ability or less can be used.
In this case, the weight of the water-permeable package 42 is increased accordingly.

The effect of suppressing snow melting increases as the thickness of the underlayer 4 increases, but it is sufficient if the thickness is about 4 to 5 cm in terms of cost performance.

Then, natural snow and / or artificial snow (artificial snow or artificial ice by an artificial snowfall machine of ICS, fan type, snow gun type, etc.) is laid on the underlayer 4 to form the snow layer 3. . Even if the snow layer 3 such as artificial snow or natural snow melts due to an increase in daytime temperature in this way, the superabsorbent polymer 41 in the underlayer 4 absorbs the water, and, for example, solid snow The snow quality of the snow layer 3 is favorably maintained due to, for example, tight snow.

Next, the maintenance of the underlayer 4 will be described. Since the superabsorbent polymer 41 is placed inside the water-permeable packing body 42, a large amount of water is generated due to rainfall, for example. 41 does not flow out, and the underlayer 4 is maintained. In particular, when the underlayer 4 is turned into a deep snow layer by contact with the snow layer 3 for a certain period of time, the underlayer 4 becomes very stable.

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the appended claims. For example,
In the above-described embodiment, an example is shown in which a large number of water-permeable packaging bodies 42 each containing a superabsorbent polymer 41 as shown in FIG. 2 are used and laid adjacent to each other, but the water-permeable packaging bodies 42 It is also possible to use two or more pre-connected in the vertical and / or horizontal direction. FIG. 4 is an explanatory view illustrating an example in which a plurality of water-permeable packaging bodies 42 are connected in advance in the vertical direction. A plurality of the water-permeable packages 42 connected in advance in the vertical direction can be produced, for example, as follows. First, prepare a vertically long bag about 1 m wide,
5 is welded, a superabsorbent polymer 41 (not shown) is put into the inside, and then welded again at a position 46 at 1 m in the vertical direction to form a water-permeable package 42-1. Next, after a superabsorbent polymer 41 (not shown) is further inserted into the inside,
Is welded again at the position 47 to form the water-permeable package 42-2. Similarly, welding is performed at the positions 48, 49,... To form the water-permeable packing bodies 42-3, 42-4,. If a plurality of such water-permeable packing bodies 42 connected in advance in the vertical direction are rolled, for example, and rolled and laid on the ground, a wide area can be easily laid.

[0044]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples. (Example 1) Superabsorbent polymer (trade name: BL-10)
0, manufactured by Osaka Organic Chemical Industry Co., Ltd., 50 times the water absorption capacity) Commercially available sandbags (jute sandbags: 60c)
mx 30 cm, 10-15 liters of water absorption per bag, or sandbag made of PP non-woven fabric: 40 cm x 40 c
m, the amount of water absorbed per bag is 8 liters), and the sandbag is laid on the floor 2 in the insulated room to form a base layer 4 having a thickness of 2 cm. Was laid to form a snow layer 3 having a thickness of 10 cm, and a simulated slope having a sectional configuration as shown in FIG. 1 was produced. And the whole at 0 ° C for 5
After cooling for 5 hours, the floor surface was maintained at 5 ° C and the room temperature was maintained at 10 ° C. After 10 hours, the thickness of the snow layer 3 was measured to evaluate the amount of snowmelt. Snow layer 3
Was reduced by 0.5 cm.

(Comparative Example 1) A heat insulating sheet (air cap) is laid on the floor 2 in the heat insulating room used in Example 1, and artificial snow is laid thereon to form a snow layer 3 having a thickness of 10 cm. Was formed. Then, as in Example 1, the whole was
After cooling for 5 hours, the floor surface was maintained at 5 ° C and the room temperature was maintained at 10 ° C. After 10 hours, the thickness of the snow layer 3 was measured to evaluate the amount of snowmelt. Snow layer 3
Was reduced by 3 cm.

(Comparative Example 2) Artificial snow was laid directly on the floor 2 in the heat-insulated room used in Example 1 to form a snow layer 3 having a thickness of 10 cm. I made a mock slope. Then, as in Example 1, the whole was cooled at 0 ° C. for 5 hours, then kept at 5 ° C. on the floor and 10 ° C. in the room, and 10 hours later, the thickness of the snow layer 3 was measured to evaluate the amount of snow melting. The thickness of the snow layer 3 was reduced by 5 cm.

[0047]

According to the first aspect of the present invention, there is provided an outdoor ski resort comprising: an underlayer formed on the ground so as to be able to exchange heat with the ground; and natural snow and / or laying on the underlayer. An outdoor ski resort comprising a snow layer made of artificial snow and suppressing melting of the snow layer, wherein the underlayer comprises a plurality of water-permeable packages containing a superabsorbent polymer therein adjacent to each other. Since it is laid and formed, a uniform underlayer can be easily formed without the necessity of a device for spraying the superabsorbent polymer, and the superabsorbent polymer of the underlayer can be easily formed even after a large amount of rainfall or snow melting in early spring. There is no remarkable effect that there is no problem of outflow of water, the underlayer is easily maintained, and the water-permeable package can be collected and easily reused during the off season. In addition, the outdoor ski resort according to the first aspect of the present invention can significantly suppress the melting of snow even under a plus temperature, and can secure and maintain good-sliding and high-quality snow. Remarkable effects such as the ability to increase the number of customers by early opening of reliable opening times and improvement of snow quality, as well as saving resources and energy for snowmaking and reducing the amount of work required To play. The outdoor ski resort according to the first aspect of the present invention can suppress the melting of snow and secure and maintain high-quality snow with good gliding properties. Since the period can be shortened, the amount of work can be reduced, resources can be saved, and energy can be saved. In addition to using ICS, it is possible to produce snow at low temperatures at night using a snow gun type or fan type artificial snowfall machine, suppress the melting of snow in the daytime, and secure and maintain high quality snow with good gliding properties. Thus, the time when the slope can be reliably opened can be shortened.

The outdoor ski resort according to claim 2 of the present invention,
Since the material forming the underlayer is a highly water-absorbing polymer that maintains independent particles even in a water-retained state, it contains a large amount of air between the particles and has a remarkable heat insulating property and a high snow melting prevention effect. Effect.

The outdoor ski resort according to claim 3 of the present invention,
Since the superabsorbent polymer is frozen, the effect of storing cold heat is great and the heat insulation is also high, so it is necessary to suppress the melting of snow more and secure and maintain good-sliding, high-quality snow. This has a remarkable effect that enables the following.

The outdoor ski resort according to claim 4 of the present invention,
The water-permeable package has strength enough to withstand handling, and at least one selected from a woven fabric, a nonwoven fabric, a net, a porous sheet, and the like having openings so large that the superabsorbent polymer contained therein does not leak outside. Since it is formed of one material, it is easy to handle, and the superabsorbent polymer put inside by opening or breaking the bag is not released to the outside, and when laying on the ground, etc. Since it has the strength not to break the bag, there is a remarkable effect that the underlayer can be easily formed.

An outdoor ski resort according to claim 5 of the present invention is
Since the water-permeable package is a bag-like material, it has a remarkable effect that it is easier to handle and that the underlayer can be easily formed.

The outdoor ski resort according to claim 6 of the present invention,
Whether the water-permeable package is fixed to each other by an auxiliary tool, or fixed to the ground by an auxiliary tool,
Alternatively, since the base layer is fixed to each other by the auxiliary tool and fixed to the ground by the auxiliary tool, there is a remarkable effect that the underlayer can be fixed and fixed on the ground by the auxiliary tool to be firmly formed.

The outdoor ski resort of the present invention can be easily formed by the method of forming an outdoor ski resort according to the present invention.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing a cross section of a slope of an outdoor ski resort according to the present invention.

FIG. 2 is an explanatory diagram illustrating a partially permeable cross section of a water-permeable packaging bag containing a superabsorbent polymer.

FIG. 3 is an explanatory view schematically showing a cross section of a slope of another outdoor ski resort of the present invention.

FIG. 4 is an explanatory diagram illustrating an example in which a plurality of water-permeable packages are connected in advance in a vertical direction.

FIG. 5 is an explanatory view schematically showing a cross section of a conventional slope of an outdoor ski resort.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A, 1B Outdoor ski area 2 Ground 3 Snow layer 4 Underlayer 41 Superabsorbent polymer 42 Water-permeable packaging bag 43, 44 Auxiliary tool

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kazuo Takekawa 18-3, Koamicho, Nihonbashi, Chuo-ku, Tokyo Inside Osaka Organic Chemical Industry Co., Ltd. (Tokyo Branch) (72) Hiroaki Umezu Nihonbashi Kodenma, Chuo-ku, Tokyo 16-8 Machi-no-uchi (72) Inventor Yuichi Niibori 16-8 Nihonbashi Kodenma-cho, Chuo-ku, Tokyo 1672-inventor Hiroshi Matsunaga 16-8 Nihonbashi Kodenma-cho, Chuo-ku, Tokyo, Japan F term (reference) 2D051 AB04 AD00 AG11 DA01 DB01 DC09 EA02 EA05

Claims (7)

[Claims] An underlayer formed on a ground so as to be capable of exchanging heat with the ground, and a snow layer laid on the underlayer and made of natural snow and / or artificial snow. An outdoor ski resort in which melting is suppressed, wherein the underlayer is formed by laying a large number of water-permeable packages containing a superabsorbent polymer therein adjacent to each other. Ski resort. 2. The outdoor ski resort according to claim 1, wherein the superabsorbent polymer is a superabsorbent polymer that maintains independent particles even in a water-retained state. 3. The outdoor ski resort according to claim 1, wherein the superabsorbent polymer after water absorption is frozen. 4. The water-permeable package has strength enough to withstand handling and has a highly water-absorbing polymer contained therein.
Woven, non-woven,
The outdoor skiing area according to any one of claims 1 to 3, wherein the outdoor skiing area is formed of at least one material selected from a net, a porous sheet, and the like. 5. The outdoor ski resort according to claim 4, wherein the water-permeable package is a bag. 6. The water-permeable package is fixed to each other by an auxiliary tool, fixed to the ground by an auxiliary tool, or fixed to each other by an auxiliary tool and fixed to the ground by an auxiliary tool. The outdoor ski resort according to any one of claims 1 to 5, wherein 7. A large number of water-permeable packages containing a superabsorbent polymer are placed adjacent to each other on the ground so as to be heat-exchangeable, laid in large numbers, and then water-permeable by a method such as water sprinkling. Water is supplied from the outside to the inside of the package so that the superabsorbent polymer absorbs water to form a base layer. Then, natural snow and / or artificial snow is laid on the base layer to form a snow layer. A method for forming an outdoor ski resort, comprising: