JPS6238482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a place for ball games, an outdoor sports field, a stadium, and particularly a ground court such as a tennis court and a construction method thereof.

[Technical background of the invention and its problems] Tennis courts, generally referred to as clay courts, are relatively elastic, so the impact on the players is alleviated and there is less excessive strain on the players.
Therefore, there is less fatigue, and there is also less risk of breakdown, making it easier to play.

However, in the summer, for example, the court often dries and hardens extremely, and in such cases, the court becomes extremely hard, impairing the effectiveness of the clay court's original function, and making it difficult for players to use. This poses a number of problems, such as making players more prone to fatigue, increasing the risk of breakdowns, and raising dust, which tends to impede play. One of the reasons for this is that traditional clay courts are constructed with rainwater drainage in mind so that players can play as much as possible after rain. The above problem becomes especially apparent during the summer months.

Therefore, in such cases, conventional methods have been used to moisten the coat surface by sprinkling water on the coat surface each time. However, according to this method,
It is not easy to keep the court surface evenly moist to the point that it does not interfere with play, and even if it gets wet, it dries in a short time in the summer, so play often has to be stopped, which is a drawback. have.

[Purpose of the invention]

The present invention was made in view of these points,
Salt water is stored in the lower layer of the ground coat, and the stored salt water is drawn up to the surface layer using capillary action by geothermal heat due to the temperature increase in the surface layer of the ground coat. By keeping the surrounding area moist as appropriate to prevent the ground coat from drying out and hardening excessively in the summer, etc., it also prevents dust from flying up, and in the winter, it prevents the formation of frost columns.
The purpose is to facilitate the maintenance, maintenance, and management of courts.

[Summary of the invention]

The present invention consists of a reservoir layer formed by laying blocks to a predetermined thickness and capable of storing salt water, and a block having a smaller diameter than the above-mentioned blocks spread to a predetermined thickness on top of this reservoir layer. It is equipped with an earth retaining layer formed and a surface layer formed by pouring sand grains through an intermediate layer formed to allow water to pass through the upper part of the earth retaining layer. It is characterized by moistening the surface layer portion or its vicinity.

In addition, the present invention lays a water-stop sheet between the U-shaped grooves in which a water-permeable portion is formed in the upper part of the inner wall, and also lays blocks of crushed stone or the like to a predetermined thickness on the water-stop sheet to prevent salt water from flowing. A reservoir layer that can hold water is created, and on top of this reservoir layer, aggregates such as gravel with a smaller diameter than the above-mentioned aggregates are spread to a predetermined thickness to create an earth retention layer. A layer with adhesive strength is formed on top of this layer to create a water-permeable intermediate layer, and a relatively thin layer of sand grain soil is poured on top of this intermediate layer to create a surface layer. The present invention is characterized in that a supply section for supplying salt water to the reservoir layer is created, and salt water at a predetermined concentration is always stored in the reservoir layer.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below as an example of a tennis court as an example of a ground court shown in the accompanying drawings.

In addition, although the following example is a case where one tennis court is constructed, the same applies to the case where a plurality of tennis courts are constructed side by side. In this specification, one side of the tennis court refers to a playing safety zone surrounded by a baseline and a sideline, and a dead zone surrounding this safety zone.

FIG. 1 is a plan view of a tennis court after implementing the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. 3 is a vertical cross-sectional view of FIG. 1.

In each of the above figures, 1 is a fence foundation buried at a predetermined depth around one side of the tennis court, and a foundation material 2 such as crushed stone is placed inside the fence foundation 1 to a predetermined width and depth. At the same time, a U-shaped groove 6 having a water-permeable portion 5 is installed and fixed on the foundation material 2 through a stabilizing material 3 such as soil, in contact with the inside of the fence foundation 1 at the upper part of the inner wall 4.
The water guide portions 7 of the U-shaped grooves 6 connected in the front, rear, left, and right directions are connected in series and watertightly, and a water supply and drainage mechanism (not shown) as a supply portion is provided at one or several locations. ing.

Next, a waterproof sheet 9 made of synthetic resin or the like that is difficult to break and has a predetermined thickness is laid on the leveled stable layer 8 between the lower ends of the inner walls 4 of the series of U-shaped grooves 6. The peripheral edge 10 of the water stop sheet 9 is raised along the wall surface of the inner wall 4 of each U-shaped groove 6 in a watertight manner. Next, water-permeable pipes 11 made of a large number of water-permeable bodies are arranged on this water-stop sheet 9 at predetermined intervals in the length direction of the tennis court, and openings 12 at both ends of each water-permeable pipe 11 are provided.
is inserted into the inner wall 4 of the corresponding U-shaped groove 6 to form a communicating opening in the water guide section 7, and the openings 1 at both ends
A stopcock 13 is detachably attached to 2. Further, on this water stop sheet 9, pumice or crushed stone 14 of a predetermined size as a lump is laid down to a predetermined thickness, and the permeable pipe 11 is buried using the crushed stone 14. This creates a reservoir layer 16 that can watertightly store the salt water 15.

Next, small gravel 17 such as volcanic gravel in the form of lumps smaller in diameter than the pumice or crushed stone 14 is spread over the upper part of the reservoir layer 16 to a predetermined thickness to create an earth retention layer 18 that controls capillary action.

Next, a loam layer 19 is created by pouring earth and sand, such as loam soil, to a predetermined thickness, which controls capillary action, on the earth retaining layer 18, and at the same time, the upper layer of this loam layer 19 is filled with Arakida soil, etc. An anchoring layer 2 is formed by pouring relatively adhesive soil to a predetermined thickness.
0, and the loam layer 19 and fixing layer 20 form an intermediate layer 21 through which water can pass and which controls capillary action. Further, the fixing layer 20 of the intermediate layer 21
A relatively thin layer of sand grains, soil, or a mixture of these 22 of sand grains or soil of a predetermined grain size is placed on top of the surface layer 23.
Create.

Therefore, when creating this surface layer 23, salt or bittern can be mixed with soil or sand grains by pouring and rolling, or by sprinkling salt water or bittern after creating the surface layer 23. Through chemical action, it decomposes clay, etc. that are stuck in the gaps between soil particles, loosens the soil, and transforms the soil into a soil that is easier to compact. Therefore, by rolling out this surface layer 23 with a rolling pressure roller or the like, the soil particles become closely interlocked with each other, increasing the density of the soil, and making it possible to stabilize the surface layer 23. Further, a measuring section 25 for measuring the concentration of salt water 15 in the reservoir layer 16 is formed at a predetermined position on the surface layer 23, for example, near a pole 24 on which a net g is stretched over the court, which will be described later.

Next, a baseline a and a sideline b are formed in the center of the surface layer 23 to define a safety zone c for double play, and a safety zone d and a service line e for single play are defined inside this safety zone c. define. A dead zone f including a playing area is formed around the safety zone c for double spray. This creates a tennis court as a ground court. In the figure, 26 is a fence provided on the fence foundation 1, and 27 is a lid removably placed on each of the U-shaped grooves 6.

In such a configuration, for example, in the summer when rainfall is low and the temperature is high, when the tennis court is in a state where it is easy to dry and harden and become a hard court, one end or both ends of each water permeable pipe 11 Remove the stopper 13, open the opening 12, and open the series of U
When salt water 15 adjusted to a predetermined concentration is supplied to the water supply and drainage mechanism part formed in a part of the groove 6, this salt water 15 flows from a series of water guide parts 7 into each water permeable pipe 11 opened thereto. The salt water 15 that has flowed into each of the permeable pipes 11 further flows out from the inside of the permeable pipes 11 to the outside, and collects pumice and crushed stones 1.
Infiltrate 4. When a predetermined amount of salt water 15 is stored in the storage layer 16, the salt water 15 permeates into the water guide part 7 from the water permeable part 5 formed at the upper part of the inner wall 4 of the U-shaped groove 6, and is lost. Ru. Then, a stopcock 13 is fitted into the opening 12 of each opened water permeable pipe 11. Therefore, the salt water 1 that has flowed into the reservoir 16
5 is stored in a predetermined amount by the water stop sheet 9 and the inner wall 4 of the U-shaped groove 6. In addition, by appropriately storing a predetermined amount of salt water 15 in the water guide section 7, the reservoir layer 1
As the salt water 15 in the tank 6 is digested as described later, the salt water 15 is sequentially supplied into the reservoir 16, so that the salt water 15 can be stored in the reservoir 16 at all times. .

In the above case, since the earth retention layer 18 is formed above the water permeable part 5 formed on the inner wall 4 of the U-shaped groove 6, an excessive amount of salt water 15 is introduced from the storage layer 16 through the water permeable part 5. When water permeates into the portion 7, the earth retaining layer 18 is not washed away and damaged by the salt water 15.

In such a state, the surface layer parts, that is, the surface layer 23 and the fixing layer 2, are damaged by the heat of the sun under the scorching sun.
When a portion such as 0 is heated to a predetermined temperature, the water in the surface layer 23 and anchoring layer 20 is evaporated, but the salt water 15 in the reservoir layer 16 is automatically removed by the capillary action of the loam layer 19 due to the geothermal heat. The moisture is evaporated from the surface layer 20, and the salt remains in the surface layer without evaporating. Therefore, while it is strongly heated by solar heat, the loam Layer 19 as well as other parts such as surface layer 23 or fixing layer 20 are moistened to an appropriate moist state that does not interfere with the plate and does not dry completely, and this state is maintained, so that it does not interfere with play as a whole. This prevents the material from drying and hardening to the extent that it causes caking.

In addition, when salt remains in the surface layer, the chemical action of the salt breaks down the clay that is interwoven between the soil particles, and the gaps between the particles disappear, making the soil in the surface layer well compacted. It became like this,
Therefore, by applying a roller, the surface layer can be easily stabilized, and since salt tends to attract moisture, it maintains an appropriate amount of moisture and the surface of the surface layer 23 is covered with fine salt crystals and a thin layer of soil. A film is formed to prevent drying.

Also, in periods other than summer when the tennis court is not particularly dry and hardened, for example in winter, the surface layer remains, preventing frost from forming, and small amounts of snow can easily melt and accumulate. Therefore, maintenance in early spring becomes easy.

Next, the rainwater is transferred to the surface layer 23 and the fixed layer 2.
0, the water passes through the loam layer 19 and the earth retention layer 18 and enters the reservoir layer 16, and then flows out from the water permeable portion 5 into the water guide portion 7.

Also, depending on the amount of rainfall, by removing the stopcock 13 of each water permeable pipe 11, rainwater flows out through each water permeable pipe 11 from its opening 12 into the water guide section 7.

In the above embodiments, each water permeable pipe is arranged in the vertical direction, but the water permeable pipes are not limited to this, but may be arranged in the horizontal direction, or vertically and horizontally. Although we have explained the case where the permeable pipes are arranged on the same plane, the permeable pipes may be arranged in different vertical positions.In any case, each permeable pipe is By placing it on the water sheet,
Salt water will not seep into the surface along each of the permeable pipes.

Further, in the above embodiments, the explanation has been given by taking a tennis court as an example, but the present invention is not limited to this, and can be applied to various grounds such as an outdoor sports field or a stadium.

〔Effect of the invention〕

According to the present invention, a reservoir layer in which salt water remains is formed by laying the lumps in the lower part of the ground coat, and the surface layer is added to the upper part of this reservoir layer through an earth retaining layer that controls capillary action and an intermediate layer. Once formed, the geothermal heat generated by the temperature increase in the surface layer automatically pulls up the salt water in the reservoir, and the water evaporates from the surface layer, and the salt remains in the surface layer, thus increasing the surface layer. The ground court or the surrounding area is automatically moistened to an appropriate moisture state, which reliably prevents the ground court from drying out and hardening excessively, and reduces the possibility of dust and dust flying up, which prevents players from getting in their eyes and throat. There is no risk of damaging the soil, and since the salt remains in the surface layer, the chemical action of the salt compacts the soil well, making it possible to easily stabilize the surface layer by rolling it, giving the soil elasticity. It is easy to use in the winter because it is difficult to form uneven surfaces, gives good bounce to the ball, and does not easily form frost pillars in the winter, and it is possible to maintain the ground conditioning in good condition at all times. It is extremely suitable for the preparation, maintenance, and management of grounds. In addition, the reservoir layer has a permeable part formed in the upper part of the inner wall.
By laying a water-stop sheet between the grooves and laying blocks on top of this water-stop sheet to a predetermined thickness, a reservoir layer for storing salt water can be easily created, and this water-stop sheet and The U-shaped groove makes it possible to maintain the supplied salt water at a predetermined water level, and also to reliably prevent its leakage and prepare for wetting the surface layer portion or layers in its vicinity. Therefore, in the case of a tennis court, for example, the effectiveness of the clay court's original functions can be ensured as a whole, and player fatigue is reduced as would be the case with an extremely hard court. Furthermore, it is possible to provide a court that is easy to play on and has little risk of breakdown.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Figure 1 is a plan view of a tennis court, Figure 2 is a cross-sectional view of the same, and
FIG. 3 is a longitudinal sectional view of FIG. 1. 4...Inner wall, 5...Water permeable part, 6...U-shaped groove, 9...Water stop sheet, 14...Lump, 15...Salt water, 16...Reservoir layer, 17...Lump, 18...Earth retention layer, 19...Intermediate layer ,
22...Sand grains, 23...Surface layer.

Claims (1)

[Scope of Claims] 1. A reservoir layer formed to be able to store salt water by laying lumps to a predetermined thickness, and on top of this reservoir layer, lumps with a smaller diameter than the above-mentioned lumps are arranged to a predetermined thickness. It is equipped with an earth retention layer formed by filling the soil, and a surface layer formed by pouring sand grains through an intermediate layer formed to allow water to pass through the upper part of the earth retention layer. A ground coat characterized by moistening the surface layer or its vicinity using geothermal heat. 2. A water stop sheet is laid between the U-shaped grooves that form a permeable part on the upper part of the inner wall, and blocks such as crushed stones are spread over this water stop sheet to a predetermined thickness to create a reservoir layer that can store salt water. A soil retention layer is created by laying aggregates such as gravel with a smaller diameter than the above-mentioned aggregates to a predetermined thickness on top of this reservoir layer, and earth and sand are placed on top of this earth retention layer to a predetermined thickness. At the same time, a layer with adhesive strength is formed on top of the concrete to create an intermediate layer through which water can pass, and a relatively thin layer of sand grain soil is poured on top of this intermediate layer to create a surface layer. A construction method for a ground court, characterized in that a supply section for supplying salt water to the layer is created, and salt water at a predetermined concentration is always stored in the storage layer.