JPH08260469A - Protection method for side slope - Google Patents

Abstract

PURPOSE: To make asphalt wastes disposable with effective utilization provided therefor by a method wherein the asphalt wastes are processed with adjustment in particle sizes applied, and a base material is formed therefrom with a soil improvement agent, a sticking agent, a fertilizer and seeds mixed, and a thick layered base material is formed with the base material sprayed in a specified thickness on a side slope. CONSTITUTION: Asphalt wastes are processed with adjustment in particle sizes applied, and a base material is formed therefrom with a soil improvement agent, a sticking agent, a fertilizer and seeds mixed. With the base material sprayed on a side slope, a thick layered base material M is formed, and a stabilized vegetation base is made up therefrom with the seeds becoming germinant. Thereby, the asphalt wastes become disposable, being utilized as a principal component of a vegetation base for protection and plant-growing for the side slope.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope protection method capable of protecting slopes by greening and effectively utilizing asphalt waste materials which are difficult to treat as industrial waste.

[0002]

2. Description of the Related Art Since asphalt is widely used as a road paving material, a large amount of waste material is generated.

Waste asphalt is usually transported to a landfill site and used as landfill soil.

[0004]

According to the prior art, since the asphalt waste material is generally in the form of a large plate or a lump, the transportation efficiency is extremely poor when it is carried into a predetermined landfill point, and it is used as landfill soil. However, there is a problem that voids are easily generated in the ground and the obtained ground strength is poor, and it is not always the best treatment method.

Therefore, in view of the above problems of the prior art, an object of the present invention is to use the waste asphalt waste material effectively as a base material for protecting the greenery of the slope, thereby treating the slope. To provide a protection method.

[0006]

[Means for Solving the Problems] The structure of the present invention for achieving the above object is to adjust the particle size of asphalt waste materials, mix soil improving materials, adhesive materials, fertilizers, and seeds to form a base material, The gist is to form a thick layer base material by spraying to a predetermined thickness.

It should be noted that the slope may be lathed prior to spraying the base material.

As the fertilizer, a fast-acting fertilizer and a slow-acting fertilizer may be used in combination.

[0009]

According to the structure of the invention, the waste asphalt material is formed into a base material which is easily sprayed through the nozzle gun by adjusting the particle size to an appropriate particle size or less and mixing it with the soil improving material, the adhesive material and the like. You can Then, if a base material is sprayed on the slope to form a thick layer base material, the thick layer base material becomes a stable vegetation base by germination of seeds. The asphalt waste at this time has a grain size of 10 mm.
Below, it is more preferable to adjust the particle size to 5 mm or less.

Generally, the asphalt waste material generated from the asphalt pavement contains impurities such as gravel, sand and soil adhering to the lower surface of the asphalt mixture, in addition to the asphalt mixture forming the surface layer and base layer of the pavement. The latter is the one that comes off from the upper part of the roadbed together with the pavement by removing the pavement. Therefore, the asphalt waste material referred to here includes both the former asphalt mixture and the latter impurities adhering thereto, and in the case of mechanically separating the two, only the former or only the latter may be used. Alternatively, it may be a mixture of both. The asphalt mixture containing impurities or having the impurities removed can be crushed to adjust the particle size, and the impurities can be adjusted by sieving to remove particles having an excessive particle size. That is,
The particle size adjustment mentioned here includes a necessary crushing step.

The asphalt waste material whose particle size has been adjusted in this manner may be mixed with an appropriate amount of sand as an extender.

As the soil conditioner, compost compost prepared by sufficiently fermenting and aging organic matter such as bark, peat moss, livestock manure, and sewage sludge can be used. The mixing ratio of asphalt waste materials and soil improvement materials is 5 by volume.
It is preferably 0:50, but may be about 70:30 at maximum. However, with 100% asphalt waste material, it is difficult to form a good vegetation base because there is no organic matter.

As the adhesive material, a suitable amount of a vegetable starch-based paste material is used, and when the base material is sprayed on the slope, the thick base material is prevented from collapsing or eroded by rainwater. The adhesive may be cement-based or resin-based, but plant starch-based ones are more preferable in order to realize good permanent vegetation at an early stage. Cement-based and resin-based adhesives
This is because the fertilizing effect of promoting the germination and growth of the plant cannot be expected at all, whereas the plant starch-based adhesive has a great fertilizing effect over a long period of time.

The fertilizer is necessary in order to maintain the vegetation after the germination of the seed, and the advanced chemical fertilizer having an appropriate active ingredient ratio can be used.

Seeds are introduced as alien vegetation immediately after construction, and an appropriate species that matches the weather conditions and land conditions of the construction site is selected. Further, it is preferable to use a plurality of kinds of seeds in a mixture from the viewpoints of the speed of initial growth, the size of plant height, the presence or absence of nitrogen-fixing ability, and deep root or shallow root. In addition, in general, the seeds used here need only be able to maintain vegetation for several years until the native species invade and grow.

A stable thick layer base material can be formed by spraying the base material with a predetermined thickness on the slope using a nozzle gun of a mortar spraying machine. At this time, by introducing a small amount of water into the nozzle gun,
It is possible to effectively improve the overall bonding strength of the adhesive material and the adhesive strength to the slope. Generally, the spraying thickness of the thick layer base material may be about 2 to 10 cm, and an optimum value is set depending on the geology of the rock forming the slope, soil hardness, gradient and the like. Further, the thick layer base material may be formed to have a uniform thickness parallel to the slope, or may be formed in a step shape having a ridge-like undulation on the surface along a contour line of the slope.

By lathing the slope prior to spraying the base material, the stability of the thick layer base material can be further improved. As the lath, for example, zinc-drawn iron wire 14
Use a wire lath of about 50 x 50 mm, and fix it on the slope with anchor pins and auxiliary anchor pins of appropriate size. When the thickness of the thick layer base material is about 5 cm or more, the lath is preferably placed in the middle of the thick layer base material.

As the fertilizer, by using a fast-acting fertilizer and a slow-acting fertilizer in combination, it is possible to effectively realize early vegetation rooting and its continuous growth. A general advanced chemical fertilizer can be used as the fast-acting fertilizer, and a coating fertilizer can be used as the slow-acting fertilizer. The coated fertilizer is a slow-acting fertilizer coated with a poorly water-soluble coating such as a polyolefin resin or a phenol resin.

[0019]

As described above, according to the present invention, crushed asphalt waste material, soil improving material, adhesive material,
Unlike other natural materials, asphalt waste materials retain metal components and fungal species harmful to plants and animals by mixing fertilizer and seeds and spraying on the slope to form a thick base material. There is little fear, and it has an excellent effect that it can be effectively utilized and treated as a main constituent material of the vegetation base for protection of slope greening.

[0020]

[Embodiment 1] Fig. 1 shows the entire process of a slope protection method.
The construction cross section is shown in FIG.

As the asphalt waste material, road pavement waste material containing impurities such as gravel, sand and soil was used, and the particle size was adjusted by crushing it to a particle size of 5 mm or less and an apparent specific gravity of about 1.5. The soil conditioner is
Mix and use ripe bark compost and peat moss,
The asphalt waste material was mixed at a volume ratio of 50:50, and an appropriate amount of an adhesive, fertilizer, and seed was added and mixed to obtain a base material. The mixing machine used was a hopper with a vibrator. As the fertilizer, a fast-acting fertilizer and a slow-acting fertilizer were used in combination, and the seeds were Kentucky 31 fescue, creeping red fescue, orchardgrass, mugwort and medhagi mixed seeds.

After removing foreign matter and cleaning the slope N, a lath L is stretched through the anchor pin P1 and the auxiliary anchor pin P2, and a base material prepared in advance is sprayed to the thick layer base material M.
Was formed. A thick layer base material M having a thickness of t = 5 (cm) or more could be produced by using the base material in an amount of 200 liter / m ² .

The construction was carried out in the middle of October, and the 7th, 21st,
On the 49th day, the height of each germinated plant is about 4 to 5 mm and about 7 respectively.
10 to 10 cm, about 10 to 15 cm, and a uniform germination record of 20 to 30 germinations per 10 × 10 cm ² was obtained. Also,
No erosion due to rainwater was observed.

[0024]

[Embodiment 2] In the previous embodiment, the thick layer base material M was formed in a stepwise manner with the maximum thickness t1 = 10 (cm) and the minimum thickness t2 = 2 (cm) (Fig. 3).

Compared to the previous example, the germinated state was such that the thick layer base material M
It was even better in the concave portions.

[Brief description of drawings]

[Figure 1] Overall process diagram

[Fig. 2] Construction sectional view (1)

[Fig. 3] Construction sectional view (2)

[Explanation of symbols]

 N ... Slope M ... Thick layer base material L ... Lass

Claims (3)

[Claims] 1. A thick layer base material is formed by adjusting a particle size of asphalt waste material, mixing a soil improving material, an adhesive material, a fertilizer, and a seed to form a base material and spraying the base material to a predetermined thickness. Slope protection method. 2. The method for protecting a slope according to claim 1, wherein the slope is lathed prior to spraying the base material. 3. The slope protection method according to claim 1 or 2, wherein the fertilizer is a combination of a fast-acting fertilizer and a slow-acting fertilizer.