JPH02252803A - Freeze proofing method for ground surface and green for freeze proofing golf course - Google Patents

Abstract

PURPOSE:To prevent freezing of a ground surface by providing a gravel layer below the ground surface, burying a collecting and draining pipe and an exhaust pipe having exhaust holes in or below the gravel layer, draining water from the collecting and draining pipe, and ventilating air having a given temperature or more from the exhaust pipe. CONSTITUTION:The surface layer 4 of a green in a golf course is formed with a mixed sand layer 10 and a sand layer 11. A gravel layer 3 and a base 2 are provided below the layer 11, and a collecting and draining pipe 1 is provided with the base tilted. And rainwater falling on the green or water melted and oozing out therefrom is drained from the collecting and draining pipe. And an exhaust pipe 5 having many exhaust holes is buried in the gravel layer 3, air having 0 deg.C or more temperature is sent out from the exhaust pipe with blowing and heating means, and is discharged in the gravel layer from the exhaust holes. This enables efficient drainage, freezing of a ground surface to be prevented, and growing of turf to be promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for preventing freezing of a ground surface, and more particularly to a method of preventing freezing of a ground surface suitable for sports facilities, and a golf course green using the method.

(Prior Art) Freezing of the ground surface in winter not only impedes traffic and walking, but also has a significant impact on sports, especially when playing competitions.

For example, in places where cushioning properties are required, such as golf course greens, when the ground surface freezes, the soil loses its elasticity, causing what would normally be on-green to become green.
Not only can this become overkill, cutting the fun in half, but it is also having a negative impact on the growth of the grass.

(Problem to be Solved by the Invention) Therefore, in order to prevent such freezing of the ground surface, the present inventors previously proposed a device that blows warm air from underground to the ground surface. While further researching this device, the present inventors discovered that if a gravel layer is provided below the ground surface to prevent freezing, and warm air is flowed to the ground surface while filling the gravel layer, The inventors have discovered that the antifreeze effect can be further improved, and have arrived at the present invention.

Therefore, the first object of the present invention is to provide a ground surface that can efficiently prevent freezing of the ground surface, efficiently drain melt water, and have a positive effect on the growth of plants. The purpose of this invention is to provide a method for preventing freezing.

The second object of the present invention is to prevent freezing even in winter;
The objective is to provide golf course greens that can be enjoyed for four seasons.

(Means for Solving the Problems) The above-mentioned aspects of the present invention are such that a gravel layer is provided under the surface layer of the permeable ground surface, and a collection and drainage pipe and a large number of drainage pipes are provided in and/or under the gravel layer. Freezing of the ground surface, characterized by burying an exhaust pipe having an exhaust hole, and blowing air adjusted to a temperature of 0°C or higher through the exhaust pipe, thereby filling the gravel layer with the air and causing the air to flow out to the ground. Prevention method, and exhaust gas in a golf course green having a surface layer consisting of a mixed sand layer and a sand layer, with a gravel layer below the surface layer, a collection/drainage pipe, and a number of exhaust holes in the gravel layer and/or under the gravel layer. This was achieved by a golf course green characterized by having a tube.

Hereinafter, the present invention will be explained in detail based on examples.

FIG. 1 is a sectional view of a golf course green to which the ground surface freezing prevention method of the present invention is applied.

In FIG. 1, reference numeral (1) is a collection and drainage pipe placed on a base (2). Rainwater falling on the green and melt water are quickly drained away through this collection and drainage pipe (1).

The collection and drainage pipe (1) may be installed either in the gravel layer and/or under the gravel layer (described later), but it is preferable to install it on the base under the gravel layer as shown in the figure. To facilitate the drainage of water, the base (2) should be connected to the collection and drainage pipe (1).
) is preferable.

Further, the collection and drainage pipe can be appropriately selected from known pipes.

The code (3) is a gravel layer provided on the collection and drainage pipe (1). It is preferable to provide the gravel layer (3) over the entire surface of the green, since this allows the entire green to be uniformly heated.

The code (4) is an air permeable surface layer provided on the gravel layer (3). The surface layer of a golf course green is usually
It consists of a double layer with a mixed sand layer (lO) suitable for growing grass as the top layer and a sand layer (11) below.

Reference numeral (5) is an exhaust pipe having a large number of exhaust holes buried in the gravel layer (3). The exhaust pipe (5) can be provided at an appropriate location in and/or under the gravel layer. The air adjusted to 0°C or higher is blown to the exhaust pipe (1) from a blowing means and a heating means (not shown), and then the air is blown to the exhaust pipe (5).
It is released into the gravel layer from the exhaust hole.

(Function) With the above configuration, the air adjusted to 0°C or higher by the blowing means and heating means is sent to the exhaust pipe and exhausted into the gravel layer through the many exhaust holes drilled around the exhaust pipe. is filled with warm air. The warm air that fills the gravel layer is released to the ground surface while warming the gravel layer, preventing the ground surface from freezing.

The antifreeze method of the present invention is effective not only for preventing freezing, but also for preventing already frozen ground surfaces and snow accumulation. Melting water is quickly drained through collection and drainage pipes, so there is no accumulation of water on the ground surface. There is no abnormal softening of the ground surface.

As described above, the present invention uses warm air as a means of preventing freezing, and also provides a gravel layer over the entire surface layer, so it is possible to stably fill the underground voids with warm air. Since it is possible to uniformly warm the targeted gravel layer below the ground surface, it is possible to prevent the ground surface from freezing even if the warm air is blown intermittently, and this has a positive effect on plant growth.

Furthermore, since the collection and drainage pipes are provided in and/or under the gravel layer, drainage from the ground surface is quick, and the time required to dry the ground surface can be shortened.

Although the present invention has been described above using the case of a golf course green as an example, the present invention is not limited thereto, and can also be applied to sidewalks, tennis courts, -a stadiums, etc.

(Effects) As detailed above, according to the present invention, since the gravel layer with a large heat capacity is warmed, compared to the conventional method that normally requires continuous air blowing, air can be blown as needed. The gravel layer, which has good thermal efficiency, also plays the role of forming a buffer space when blowing air, so it does not place an excessive load on the blowing means.

In particular, when the method of the present invention is applied to golf course greens, there is no need to provide a winter green, and one green can be used throughout the seasons.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a golf course green using the ground surface freezing prevention method of the present invention. l...Collection and drainage pipe 2...Base 3...Gravel layer 4...Surface layer 5...Exhaust pipe 10...Mixed sand layer

Claims (1)

[Scope of Claims] 1) A gravel layer is provided below the surface layer of a permeable ground surface, and a collection/drainage pipe and an exhaust pipe having a large number of exhaust holes are buried in the gravel layer and/or under the gravel layer, A method for preventing freezing of a ground surface, comprising blowing air adjusted to a temperature of 0° C. or higher through the exhaust pipe, thereby filling the gravel layer with the air and allowing the air to flow out to the ground. 2) In a golf course green having a surface layer consisting of a mixed sand layer and a sand layer, a gravel layer is provided below the surface layer, and a collection/drainage pipe and an exhaust pipe with a large number of exhaust holes are provided in and/or under the gravel layer. A golf course green characterized by having: