JP2000266434A - Slope structure for snow play facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a snow layer from melting entirely by blowing cold dry air supplied to a cold dry air supply pipe from a cold dry air delivery opening through a snow mat into a snow layer deposited on the snow mat. SOLUTION: Dry air from an air supply source is supplied through a cold dry air supply pipe 8 to a header pipe 9. The dry air is ejected from each cold dry air delivery opening 9A through a bottom board 10 and a snow mat 11 into a snow layer 14. Consequently, a part of the snow layer 14 melts to form a vent communicating with the surface thereof. Subsequently, low temperature air is supplied from the air supply source to the cold dry air supply pipe 8. A part of the low temperature air is ejected into the snow layer 14 from the surface thereof through the vent and the remaining low temperature air permeates into the snow layer 14 from the vent. Since the low temperature air ejected to the outside of the snow layer 14 from the surface thereof through the vent has a density higher than that of the atmosphere, it flows as a laminar flow along the surface of the snow layer 14 while cooling it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope structure for a snow play facility such as an indoor ski area, an outdoor ski area, and a snowboard area.
In particular, by efficiently cooling the entire snow layer, it is possible to reliably prevent snow melting and compact the snow layer.
The present invention relates to a slope structure for a snow play facility.

[0002]

2. Description of the Related Art Conventionally, as a method for preventing snow melting in a snow play facility such as a ski resort, there is one disclosed in Japanese Patent Application Laid-Open No. 1-293887. Hereinafter, this snow melting prevention method is referred to as Conventional Technique 1. In the prior art 1, a refrigerant is circulated in a cooling pipe buried in a base to prevent melting of a snow layer on the base.

Another method using a refrigerant pipe is disclosed in Japanese Patent Application Laid-Open No. 3-28405. Hereinafter, this method is referred to as Conventional Technique 2.

In prior art 2, an evaporating portion of a heat pipe is buried immediately below the surface of a base, and a condensing portion of the heat pipe is arranged on the ground portion. And transports the resulting heat to the condensing section to prevent the snow layer on the base from melting.

[0005] Japanese Patent Application Laid-Open No. 3-166404 discloses a method in which a heat insulating sheet or material is laid on the bottom of a snow layer or in a base to prevent the snow layer from melting on the base. Hereinafter, this method is referred to as Conventional Technique 3.

In prior art 3, a permeable heat insulating material is laid on a base, and the upper surface of the permeable heat insulating material is covered with a nonwoven fabric made of synthetic fiber to prevent the snow layer on the base from melting.

Another method is disclosed in Japanese Patent Laid-Open No. 3-180604.
Is disclosed in Japanese Unexamined Patent Publication No. Hereinafter, this method is referred to as Conventional Technology 4.

The prior art 4 is to lay a snow support sheet having a foamed resin heat insulating layer formed on the back surface of a planar fiber base material on a base to prevent melting of the snow layer on the base. is there.

As another method, Japanese Patent Application Laid-Open No. 2-240304
Is disclosed in Japanese Unexamined Patent Publication No. Hereinafter, this method is referred to as Conventional Technique 5.

In prior art 5, a grid-like framework is formed on a base, and a heat insulating member is accommodated in the framework to prevent melting of a snow layer on the base.

Further, as another method, Japanese Patent Application Laid-Open No. 3-939
There is one disclosed in Japanese Patent Publication No. 05-2005. Hereinafter, this method is referred to as Conventional Technique 6.

In prior art 6, a heat insulating layer is formed on a base via a waterproof coating, a holding plate is laid on the heat insulating layer via a waterproof coating, and a drain groove is formed on the holding plate to form a drainage groove on the base. This prevents the snow layer from melting.

In a ski resort, when the outside air temperature is 0 ° C. or less, the heat of intrusion from the surface of the snow layer is relatively small. It is possible to prevent the layers from melting.

However, if the outside temperature of the ski resort is 0 ° C.
When the temperature exceeds the threshold, the amount of heat entering from the snow layer surface increases, and the melting of the snow layer near the snow layer surface is further promoted. Therefore, it is necessary to prevent this.

[0015]

However, in order to prevent the melting of the snow layer in a ski resort where the room temperature or the outside air temperature exceeds 0 ° C., when the above-mentioned prior arts 1 and 2 are applied, the following problems are caused. Problem.

[0016] Only the periphery of the cooling pipe is locally cooled, and the snow layer has a large number of voids inside, so that the snow layer is rich in heat insulation. Therefore, the cooling efficiency of the snow layer which is somewhat distant from the cooling pipe is low. That is, although snow melting around the cooling pipe can be prevented,
The effect of preventing snow melting on the surface layer of the snow layer into which sensible heat and radiant heat enter is low.

On the other hand, when the above-mentioned prior arts 3, 4, 5, and 6 are applied, there are the following problems.

When a heat insulating sheet or a heat insulating material is laid on the bottom of a snow layer or in a base, heat infiltration from the ground can be cut off to some extent, but heat from the snow layer surface cannot be cut off. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a slope structure for a snow play facility in which the entire snow layer is efficiently cooled, thereby reliably preventing the entire snow layer from melting and compacting the snow layer. It is in.

[0020]

According to the first aspect of the present invention,
A base including a deck plate and a concrete slab layer provided on the deck plate, a heat insulating layer provided on the base, a holding concrete layer provided on the heat insulating layer, and on the heat insulating layer and A spacer provided in a space in the holding concrete layer, a drainage groove formed between the holding concrete layers, a cold-dry air supply pipe disposed in the drainage groove, and a cold-dry air supply pipe. Connected, laid on the holding concrete layer, a header pipe provided with a plurality of spaced-apart cold and dry air discharge holes, a permeable board provided on the header pipe, and the slab It consists of a snow mat provided above,
The heat insulation layer is covered by a moisture-proof layer and a waterproof layer,
The cooling and drying air supplied to the cooling and drying air supply pipe is characterized in that the cooling and drying air is blown into the snow layer deposited on the snow mat through the floor and the snow mat from the cooling and drying air discharge hole. It is.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a slope structure for a snow play facility according to the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing a slope structure for a snow play facility of the present invention, FIG. 2 is a schematic plan view showing a pipe in the slope structure of the present invention, and FIG. FIG. 1 is a schematic vertical sectional view of a formed slope structure of the present invention.

1 to 3, reference numeral 1 denotes a base made up of a deck plate 2 and a concrete slab layer 3 provided on the deck plate 2. Reference numeral 4 denotes a heat insulating layer provided on the base 1. The heat insulation layer 4 is made of expanded polystyrene or the like, and is a moisture-proof layer 1 made of aluminum foil or the like.
2 and a waterproof layer 13 made of a resin sheet or the like. Reference numeral 5 denotes a pressing concrete layer provided on the heat insulating layer 4 for fixing the heat insulating layer 4 on the base 1. Reference numeral 6 denotes a spacer provided on the heat insulating layer 4 and in the space in the holding concrete layer 5. The material of the spacer 6 is not particularly limited, but if the same material as the heat insulating layer 4 is used, a heat insulating effect can be obtained and the thickness of the heat insulating layer 4 can be reduced.

Reference numeral 7 denotes a drain groove formed between the holding concrete layers 5. The drain groove 7 is provided with a drain port (not shown) so that snowmelt water is drained to the outside. Reference numeral 8 denotes a cool / dry air supply pipe arranged in the drain groove 7. The cool / dry air supply pipe 8 is supplied with cool / dry air from an air supply source described later.

Reference numeral 9 denotes a header pipe connected to the cold and dry air supply pipe 8 and laid on the concrete layer 5 over the entire base 1. In the upper part of the header tube 9, a plurality of cold / dry air discharge holes 9A are provided at intervals. Reference numeral 10 denotes a ventilation board provided on the header tube 9. The base plate 10 is made of a punching metal, an expanded metal, or the like. Reference numeral 11 denotes a snow mat provided on the floor plate 10. The snow mat 11 is a conventionally well-known mat having excellent breathability and made of a resin brush formed in a lattice shape.

Numeral 14 denotes a snow layer deposited on the snow mat 11, and numeral 15 supplies dry air (from over 0 ° to + 30 ° C.) and low-temperature air (from 0 ° to −30 ° C.) to the cold / dry air supply pipe 8. Air supply source for Reference numeral 16 denotes a vent formed in the snow layer 14 by the dry air from the cool dry air discharge hole 9A.

According to the slope structure of the present invention configured as described above, snow melting in a snow play facility such as an indoor artificial ski resort is prevented as follows.

First, dry air is supplied from the air supply source 15 to the header pipe 9 from the cold dry air supply pipe 8. The dry air blows out from each of the cool dry air discharge holes 9A through the floor plate 10 and the snow mat 11 and into the snow layer 14. As a result, as shown in FIG. 3, a part of the snow layer 14 is melted, and a ventilation hole 16 communicating with the snow layer 14 surface is formed in the snow layer 14. When the ventilation holes 16 are formed in the snow layer 14 in this manner, low-temperature air is supplied from the air supply source 15 to the cold and dry air supply pipe 8.

A part of the low-temperature air supplied in this way is blown out of the snow layer 14 from the surface of the snow layer 14 through the ventilation hole 16, and the remaining low-temperature air flows through the ventilation hole 16 from the snow layer 14.
Penetrates inside. The low-temperature air ejected from the surface of the snow layer 14 to the outside of the snow layer 14 through the ventilation holes 16 has a higher density than the atmosphere, and flows in a layered manner along the surface of the snow layer 14, whereby the snow layer surface Is cooled. On the other hand, the low-temperature air permeated into the snow layer 14 from the ventilation holes 16
Is frozen, which increases the hardness and shear strength of the snow layer 14. Thus, even when the inclination angle of the base 1 is large, the avalanche phenomenon hardly occurs.

Since the header tube 9 is laid over the entire base 1, the ventilation holes 16 are formed in the snow layer 14 in a mesh form. Therefore, the low-temperature air penetrates the entire snow element 14, so that the entire low-temperature snow layer is uniformly cooled in combination with the effect of the low-temperature air jetted out of the snow layer 14.

As described above, in addition to switching between dry air and low-temperature air and supplying the air to the cold / dry air supply pipe 8,
Only cold and dry air may be continuously supplied.

[0032]

As described above, according to the present invention, the low-temperature air directly penetrates into the snow layer,
Compared to the prior arts 1 and 2 of laying the refrigerant pipe on the base and the prior arts 3, 4, 5 and 6 of laying the heat insulating sheet or material on the base, the entire snow layer can be cooled more efficiently. In addition, there is provided a useful effect that the melting of the entire snow layer can be reliably prevented and the snow layer can be compacted.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a slope structure for a snow play facility according to the present invention.

FIG. 2 is a schematic plan view showing a pipe in the slope structure of the present invention.

FIG. 3 is a schematic longitudinal sectional view of a slope structure of the present invention in which a ventilation hole is formed in a snow layer.

[Explanation of symbols]

 1: Base 2: Deck plate 3: Concrete slab layer 4: Insulation layer 5: Pressing concrete 6: Spacer 7: Drainage groove 8: Cold and dry air supply pipe 9: Header pipe 9A: Cold and dry air discharge hole 10: Floor plate 11: Snow mat 12: Moisture proof layer 13: Waterproof layer 14: Snow layer 15: Air supply source 16: Vent

Claims (1)

[Claims] A base comprising a deck plate and a concrete slab layer provided on the deck plate;
A heat insulating layer provided on the base, a holding concrete layer provided on the heat insulating layer, a spacer provided on the heat insulating layer and in a space in the holding concrete layer, and A drain ditch formed in the
A plurality of cold-dry air supply pipes arranged in the drainage groove, and a plurality of spaced-apart cool-dry air discharge holes connected to the cool-dry air supply pipe and laid on the holding concrete layer, provided at intervals; Header pipe, a ventilation board provided on the header pipe, and a snow mat provided on the board, the heat insulating layer is covered with a moisture-proof layer and a waterproof layer, and the cold-drying is performed. The cold and dry air supplied to the air supply pipe is blown into the snow layer deposited on the snow mat from the cold and dry air discharge hole through the sole plate and the snow mat, for a snow play facility. Slope structure.