JPH10331106A - Roadbed for seeding and planting concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate an environment favorable for growth of plants, for a roadbed on which seeding and planting concrete is placed. SOLUTION: An upper layer roadbed 10 on which greened concrete 20 is placed, is configured with crushed stones 12 having larger diameters and a good quality soil 14 equipped with a water retaining property to fill the voids between adjoining rubbles 12. The crushed stones 12 support the greened concrete 20 and transmit the load applied to the concrete 20 to the lower layer roadbed 16 of the pavement through protection blocks 24, while the good quality soil 14 permits the upper layer roadbed 10 to store water of such a quantity as necessary for growth of plant. If a sodding 28 is inplanted in the concrete 20, the root of the sodding 28 having reached the upper layer roadbed 10 can absorb the water from the soil 14, so that an environment favorable for growth of the plant can be established.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roadbed for greening concrete for greening the road surface of a roadway.

[0002]

2. Description of the Related Art As shown in FIG. 3, an upper subgrade 32 of an asphalt pavement or a concrete pavement plays a role of a surface layer 34 cast with an asphalt mixture or concrete.
Is transmitted to the lower subgrade 36 and the subgrade 38.

In order for the upper roadbed 32 not to impair the load transmitting function, it is required that the upper roadbed 32 has good drainage properties, and crusher ores and crushed crushed stones are used as the roadbed material. Here, the particle size-adjusted crushed stone is obtained by adding other materials to a single-grained crushed stone and crusher orchid so as to have a predetermined particle size and a water content, and adjusting the water content to mix.

[0004] However, as shown in FIG. 4, when greening concrete 20 (continuously hardened body) is laid on the upper subbase 32 and the lawn 21 is planted, drainage of the upper subbase 32 is performed. Greening concrete 20
The roots of the lawn 21 extending in the voids cannot absorb moisture from the upper subgrade 32, and cannot be said to be a favorable environment in which plants grow.

[0005]

SUMMARY OF THE INVENTION In view of the above facts, it is an object of the present invention to make a roadbed on which green concrete is placed a favorable environment in which plants grow.

[0006]

According to the first aspect of the present invention, the roadbed on which the continuous gap hardening body is laid or cast is formed in a gap formed by a large-diameter hard body and an adjacent hard body. And a water-retaining material filled with water retention.

The large-diameter hard body has a function of supporting the continuous void-hardened body and transmitting the load acting on the continuous void-hardened body to the lower layer of the pavement. The water required for plant growth is stored.

[0008] Therefore, for example, when lawn is planted on the continuous void hardened body, the root of the lawn that has reached the roadbed can absorb moisture from the water retaining body, so that a favorable environment for plant growth is provided.

[0009]

1 and 2 show an upper subgrade 10 as a form of a subgrade for greening concrete according to the present invention.

The upper subgrade 10 has a large-diameter crushed stone 12 as a hard body, and a high-quality soil 14 (a water-retaining body) that is filled with the crushed stone 12 after the crushed stone 12 is spread and compacted, and then filled in the void formed by the crushed stone 12. Water-retentive and small-sized soil particles). Note that the large-diameter crushed stone 12 has a supporting strength as a roadbed material, and, when spread, is inevitably large enough to retain water required by the plant between adjacent crushed stones. Refers to the size that forms a void, usually 10 mm to 1
Although a particle size of 00 mm is conceivable, a range of 30 mm to 50 mm is preferred.

Further, the upper subbase 10 is supported by a lower subbase 16 which is spread and crushed with crushed crushed stone, and the lower subbase 16 has a predetermined supporting strength by leveling the ground. It is built on a subgrade 18.

On the other hand, greening concrete 20 is laid on the upper subgrade 10 as a continuous void hardened body.
The greening concrete 20 is a hardened material in which the surfaces of the aggregates 22 are bonded with low-alkali cement, and continuous voids are formed between the aggregates 22. These voids are filled with fibrous organic materials such as peat moss, wood chips, straw, berg compost, and shoro as a water retention material.

On the green concrete 20, there is placed a protective block 24 formed in a lattice shape from plastic, rubber or the like. This protection block 24
Has a strength not to be crushed by the wheel load of the tire T. Further, soil such as compost is filled in the lattice frame of the protection block 24 so as not to rise from the upper surface of the protection block 24, and a soil conditioner such as perlite is mixed. In the soil 26, upholstered grass 28 is planted as an example of a vegetation material.

Next, the function of the upper subbase 10 according to this embodiment will be described. First, the subgrade 18 is shaped, and the lower subgrade 16 is constructed on the subgrade 18. Next, the large-diameter crushed stones 12 are spread and leveled on the lower subgrade 16, and the high-quality soil 14 is dispersed in the voids formed between the crushed stones 12 while spraying the high-quality soil 14.
Filling.

After the construction of the upper subbase 10, the greening concrete 20 is laid. Note that the greening concrete 20 may be cast in place at a construction site instead of being precast. The greening concrete 20 and the crushed stone 12 enter each other by being cast in place, and the load is dispersed.

Next, the protective block 24 is placed on the green concrete 20, the soil 26 is sprayed, and the upholstery 28 is planted. The roots of the upholstery grass 28 extend through the soil 26,
It takes root in the water retention material filled in the voids of the greening concrete 20. Then, the roots of the upholstery grass 28 extend further down to the high quality soil 14 filled between the crushed stones 12. This high quality soil 1
4 stores water, so that roots can be grown.

Further, even if the tire T of the vehicle passes over the protection block 24, the soil 26 on which the roots of the upholstery grass 28 are rooted.
Is not compacted, so root growth is not inhibited. Further, the load transmitted to the upper subbase 10 through the protection block 24 and the green concrete 20 is transmitted to the lower subbase 16 by the crushed stones 12,
The function as a pavement is maintained.

In the present embodiment, crushed stone is used as the hard body, but natural gravel may be used, or slag or other slag may be used as long as it has a certain strength. Also,
The method of constructing the upper subbase is not limited to the method described in the present embodiment.

Further, the voids formed between the crushed stones 12 were filled with the high quality soil 14, but peat moss, wood chips,
Straw, berg compost or the like may be used.

[0020]

According to the present invention, the roadbed on which greening concrete is placed can be made a favorable environment for growing plants.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pavement using a roadbed for greening concrete of the present invention.

FIG. 2 is a cross-sectional view of a pavement using the roadbed for greening concrete of the present invention.

FIG. 3 is a sectional view showing a general asphalt pavement.

FIG. 4 is a cross-sectional view showing a state where greening concrete is laid on a conventional roadbed.

[Explanation of symbols]

 Reference Signs List 10 Upper roadbed (roadbed) 12 Crushed stone (hard body) 14 High quality soil (water retaining body) 20 Greening concrete (continuous void hardened body)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshio Yonezawa 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside the Technical Research Institute, Takenaka Corporation (72) Inventor Kunio Yanagihashi 1-5-1, Otsuka, Inzai City, Chiba Prefecture Takenaka Corporation Technical Research Institute, Inc. (72) Inventor Toshiaki Yamada 8-2-1, Ginza, Chuo-ku, Tokyo (72) Inventor Norihiko Adachi 8-2-1, Ginza, Chuo-ku, Tokyo, Japan No. Takenaka Civil Engineering Co., Ltd. (72) Inventor Shinichiro Ando 8-21-1, Ginza, Chuo-ku, Tokyo, Japan (72) Inventor Mitsui Taniguchi 590-1, Takao, Tsuyama-shi, Okayama Japan In-company (72) Inventor Daisuke Toyohara 590-1 Takao, Tsuyama-shi, Okayama Pref.

Claims (1)

[Claims] 1. A roadbed for greening concrete on which a continuous void hardened body is laid or cast, wherein the load acting on the continuous void hardened body and acting on the continuous void hardened body is applied to a lower layer of a pavement. A roadbed for greening concrete, comprising: a large-diameter hard body to be transmitted; and a water-retaining body filled with voids formed by the adjacent hard bodies and having water retention.