JPH0127202B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for renovating a paved surface of a playground,
In particular, it is possible to repair an existing playground with a non-permeable hard pavement surface to a permeable elastic pavement surface at a low cost and in a short period of time.

In recent years, a material made by adding an adhesive to a mixture of granular rubber and fiber rubber, bonding them together and solidifying them has been developed as a paving material for sports fields such as tennis courts and track and field stadiums. It is widely used as a molded elastic paving material,
When renovating an existing playground that has not been constructed with permeable elastic pavement to a permeable elastic pavement surface, the existing asphalt concrete or concrete paving material must be dug up and removed, and then crushed stone added to the roadbed. The construction method used is to level the ground by shaking it out, lay water-permeable asphalt concrete on top of it, and then spread water-permeable elastic paving material and compact it.

However, this method of excavating and renovating the entire surface of an existing playground not only prolongs the construction period and requires a large number of man-hours, but also increases material costs and reduces the amount of waste of excavated paving material. There is a drawback that the overall cost is high, such as an increase in

This invention was made to eliminate the above-mentioned drawbacks, and an object of the invention is to provide a method for renovating the paved surface of an existing playground to a water-permeable elastic paved surface in a short time and at low cost. There is a particular thing.

That is, the present invention, as shown in the embodiments and drawings described later,
2 and 23 are excavated at appropriate intervals to provide a plurality of culverts 25 whose bottoms are deeper than the roadbed surface 20a, and fill the culverts 25 with permeable asphalt concrete or single-grained crushed stone 30 to pave the existing pavement. A paved surface of a playground, characterized in that after making the surface almost flush with the surface of the existing paved surface, a permeable asphalt concrete 31 is laid over the entire surface of the existing paved surface, and a permeable elastic paving material is further laid on top of the asphalt concrete 31 to form a surface layer 32. Regarding the repair method.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which an existing tennis court was renovated by the method of the present invention. In the figure, reference numeral 10 is a tennis court, 11 is a court line, 12 is a net, 13 is a fence, and 14 is a drain. 15 indicates a water collection basin. As shown in FIG. 2, the paved surface of the tennis court 10 before renovation consists of a non-permeable base asphalt concrete 21 and a surface asphalt concrete 22 constructed on a roadbed 20. It is covered with a coat surface material 23 and paved.

Paving materials 21, 22 of the above tennis court 10,
23 are excavated parallel to the length direction at predetermined intervals in the width direction to provide a plurality of branch culverts 25 whose bottoms are deeper than the surface 20a of the road bed 20 (FIG. 3).

Next, the paving materials 21, 22, 23 and the roadbed 20 are excavated from approximately the center of the branch culvert 25 at the left end of the tennis court 10 in a direction that intersects each branch culvert 25, so that the tip of the paving material 21, 22, 23 and the roadbed 20 are located at the tennis court 10. A main culvert 26 is provided that reaches the water collection basin 15 at the right corner (Figure 4).

The main culvert 26 is excavated so as to slope downward toward the water collection basin 15, and the slopes of the branch culverts 25 are set to slope downward toward the intersection with the main culvert 26.

As shown in FIG. 4, the main culvert 26 has
After burying a permeable pipe 27 with a large number of small holes on its circumferential surface, crushed stone 28 is introduced up to the roadbed surface 20a.

Next, permeable asphalt concrete or single-grained crushed stone 30 is filled onto the crushed stones 28 of the branch culvert 25 and the main culvert 26, respectively, so that they are on the same level as the existing paved surface or slightly higher than the existing paved surface. Figures 3 and 4).

Finally, water-permeable asphalt concrete 31 is laid over the entire surface of the existing paved surface, and a water-permeable elastic paving material is laid thereon as the surface layer 32.

The water-permeable elastic paving material is made of granular rubber of an appropriate particle size, or a mixture of granular rubber and fiber rubber of an appropriate shape and length in an appropriate ratio, and a liquid curable rubber-based or synthetic resin-based material. Using a material to which an appropriate amount of adhesive has been added, this material is spread over the entire surface of the water-permeable asphalt concrete layer 31, and then the surface is rolled to make it smooth. When the adhesive hardens in this state, the viscous rubber or granular rubber and fibrous rubber are combined and solidified in an irregularly entangled state, forming a porous surface layer.

FIG. 5 shows a cross section of the paved surface at a location where the branch culvert 25 and the main culvert 26 are not provided.

The thickness of the permeable asphalt concrete layer 31 to be laid over the entire surface of the existing pavement is preferably 30 to 50 mm, and the permeable elastic paving material for the surface layer 32 is preferably 8 mm thick.

In the tennis court renovated as described above, rainwater that falls on the paved surface during rainfall permeates through the permeable asphalt concrete layer 31 from the surface layer 32 of the permeable elastic paving material, enters the branch culvert 25, and enters the branch culvert 25. Rainwater that has permeated into the permeable asphalt concrete or single-grained crushed stone layer 30 flows toward the main culvert 26 due to its slope, and the main culvert 26
The rainwater that sinks between the crushed stones 28 and enters the permeable pipe 27 and flows along the slope of the permeable pipe 27 is collected in the water collection basin 15.
After that, it will be discharged outside.

Furthermore, the rainwater that has flowed into the branch culvert 25 and the main culvert 26 flows into the main culvert because the bottom surfaces of the branch culvert 25 and the main culvert 26 are in contact with the roadbed surface 20a or are located deeper than the roadbed surface 20a. A considerable amount naturally permeates into the roadbed 20 by the time it enters the permeable pipes 27 of 26.

In this way, rainwater that falls on the renovated pavement permeates through the pavement, preventing the formation of puddles and eliminating the need for maintenance after the rain has cleared, allowing the court to be used as an all-weather tennis court that is easy to maintain. becomes possible.

Furthermore, since the surface layer 32 of the tennis court renovated by the method of the present invention is paved with a water-permeable elastic paving material, it not only has good permeability of rainwater but also provides a comfortable feel to the feet of the players. The ball is flexible, causes less fatigue and injury, and the ball bounces well, allowing it to be used under optimal conditions.

In the above embodiment, the branch culvert and the main culvert are excavated, but if the existing tennis court site is built on a roadbed with good permeability, the branch culvert and the main culvert are not necessarily connected. No need to dig,
The main culvert can be omitted and only the branch culverts need to be excavated, allowing rainwater flowing into the branch culverts to directly infiltrate into the roadbed. Therefore, in this case, there is no need to bury a permeable pipe in the branch culvert, and there is no need to create a slope.

As explained above, the present invention involves partially excavating the paving material of an existing playground to a depth below the roadbed surface to provide a plurality of culverts, and filling the culverts with permeable asphalt concrete or single-grained crushed stone. , A permeable asphalt concrete is laid over the entire surface of the existing pavement, and a permeable elastic paving material is laid on top of it to form the surface layer. Therefore, according to the present invention, there is no need to dig up paving material over the entire surface of the existing playground, which significantly shortens the construction period, reduces man-hours and material costs, and reduces the amount of waste of existing paving material. Since the amount is small, it is possible to retrofit to a water-permeable elastic pavement surface at a low cost.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a tennis court renovated by the method of the present invention, FIG. 2 is a partial sectional view of the existing tennis court, and FIG. 3 is an enlarged sectional view taken along line A-A in FIG. 1. 4 is an enlarged sectional view taken along the line B--B in FIG. 1, and FIG. 5 is an enlarged sectional view taken along the line CC in FIG. 1. In the figure, 10 is a tennis court, 20 is the roadbed of the tennis court, 20a is the roadbed surface, 21, 22, 23 are existing paving materials, 25 is a culvert, 30 is a permeable asphalt concrete or single-grain crushed stone layer in the culvert,
31 is a water-permeable asphalt concrete layer on the existing pavement surface, and 32 is a surface layer of the water-permeable elastic pavement material.

Claims (1)

[Claims] 1 Excavate the paving material of the existing playground at appropriate intervals, install multiple culverts with the bottom deeper than the roadbed surface, and fill the culverts with permeable asphalt concrete or single-grained crushed stone to cover the existing paved surface. A method for renovating a paved surface of a playground, which is characterized by laying water-permeable asphalt concrete on the entire surface of the existing paved surface, and then laying a water-permeable elastic paving material on top of it to form a surface layer.