JPH0252050B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a greening method for hard rock slopes, and is suitable for use in waste lands where the soil of the ground is extremely hard and roots of trees and ivy cannot be expected to take root. To save the labor of spraying work and to save slope spraying materials by forming a sprayed layer of mortar or concrete suitable for planting and only around the planting area.

[Conventional technology]

Generally speaking, among this type of conventional construction methods, the slope greening construction method is known as Utility Model Registration No. 1592242 (Utility Model Publication No. 1592242 (Utility Model Publication No. 59-30061), provided by the inventor or applicant of the present application, as shown in Figure 2). It is being

The above-mentioned invention provides for easy excavation of slopes.
A soil bag for planting 4 is housed in a pocket having an approximately inverted triangular vertical section formed between a soil bag holding frame 1 made of bent and formed rigid wood net material and a slope surface 2. The slope surface excluding the top surface is covered with lath 7 and sprayed with mortar or concrete 8.

[Problem that the invention seeks to solve]

However, in the above-mentioned method, spraying is applied to the entire slope where the ground surface is relatively soft, so spraying is applied to areas other than the planting areas on the slope where there is no risk of collapse due to the hard rock geology. Doing so is time consuming and costly.

In addition, the wire mesh stretched on the slope is
Approximately half of the thickness of the sprayed layer 8 is separated from the slope through the spraying layer 2, so if spraying is not performed,
The effect of installing wire mesh on slopes is halved. However, if the wire mesh is separated from the slope, it may cause fine rock particles generated from the slope to fall due to wind and rain.

[Means for solving problems]

Therefore, in order to solve the problems of the conventional devices and achieve the object of the invention, the present invention provides a greening method for hard rock slopes in which a net is closely stretched along the surface of the ground. Place the soil bag in the area where you want to plant the net, hold it with the holding frame, fix the soil bag together with the holding frame to the slope using anchor pins, and then remove the soil. After leaving an opening for planting on the top of the bag and spraying mortar or concrete around the soil bag to form a sprayed layer, open the soil bag to match the position of the planting opening on the top of the bag. The project involves planting trees in soil bags.

[Effect]

Hereinafter, the operation or construction procedure based on the construction method of the present invention will be explained.

First, in preparation for construction, the slope is surveyed, a development map is created, and the locations for installing the soil bags are determined. The slope will also be cleaned as necessary.

Then, based on the design documents, markings are made on the slope where the soil bags will be installed.

Next, the netting is stretched over the entire slope, and the netting is made to conform to the unevenness of the slope using pegs as appropriate.

On the other hand, prepare a soil bag to mix and stir soil with fertilizer and soil conditioner in a vacant lot near the construction site, and then place the soil bag on top of the net on the slope according to the markings. At the same time, the soil bag is fixed to the slope from above the net body by placing the soil bag over the holding frame so as to hold it, and passing an anchor pin through the holding frame and driving it into the ground.

Further, a drainage pipe is arranged at the lower part of the holding frame, and its base end is joined to the soil bag.

Next, a mold member for forming a planting hole is placed on the top surface of the soil bag, and then mortar or concrete is sprayed around the soil bag. When the sprayed layer by the sprayer has hardened, the mold member is removed and trees and ivy are planted in the soil bag opening located at the planting opening of the sprayed layer.

〔Example〕

Examples of the present invention will be described below.

1 is a net stretched closely along the slope A of hard rock geology, and may be made of wire mesh, synthetic resin mesh, or any other suitable material. Also, when constructing the net body with wire mesh, it is possible to use thin linear bodies and meshes of appropriate size in order to easily fit on slopes, specifically, 1 mm in diameter.
The size of the mesh is set to a tortoise shell with a side of about 26 mm. In addition, if the net body is made of synthetic resin,
The size of the mesh can be arbitrary as long as it is set to a thickness that will not easily wear off when stretched.

In addition, it is important to drive pegs 11 into areas where the net body separates from the slope due to severe rock irregularities, etc. so that it will fit in with the slope.

Reference numeral 2 refers to a soil bag that is placed on the area where the net is to be planted.The material is a relatively thin sandbag 21 filled with soil 20, and the sandbag is covered with a thick layer of chemical products or vegetable crude fiber. Store in a bag made of sediment prevention material with a diameter of 10 mm or more. The storage capacity of the soil bag is set to 3.0 to 4.0 m ³ . In addition, the soil 20 shall be a high-quality black landscaping loam containing no impurities, and if high-quality loam cannot be obtained, the soil shall be carefully improved before filling. In this case, the opening 22 of the soil bag shall be located at the top.

The above-mentioned soil bags are set at a rate of one for every 2.5 to 3.0 ^m2 , and therefore around 40 bags ^per 100 m2.

3 is a holding frame for holding the soil bag 2 and fixing it to the slope A from above the net body 1, and is made of expanded metal and has wings 31, 31 bent on both the left and right sides, and is approximately triangular in vertical section. Molded into a pocket type,
The anchor pin 10 is inserted into the wing piece and driven into the ground, and the hook part ₁₀₁ is hooked to the wing piece 31 and fixed to the slope A together with the earth body 2.

Reference numeral 4 indicates a drainage pipe which is hooked to the lower part of the holding frame 3 and whose base end abuts against the soil bag 2.

Reference numeral 5 denotes a circular or square mold member for forming a planting opening placed on the top surface of the soil bag, the height h of which is higher than the set thickness of the sprayed layer, and the mold member is formed into an inverted conical shape.

Reference numeral 6 denotes a sprayed layer of mortar or concrete that is solidified only around the soil bag 2 and the holding frame 3 by spraying, and its thickness t is set to about 10 mm. 7 indicates a shrub or ivy to be planted in the opening 22 of the soil bag 2 through the planting opening 8 provided in the sprayed layer 6, and the suitable shrub is Japanese clover, and the suitable ivy is Natuzota. , it is desirable to plant both of the above together.

〔Effect of the invention〕

Since the present invention has the above configuration, the soil bag can be fixed to the slope from above the net body via the holding frame and anchor pins. Therefore, the installation is quick and there is no need to cut the net body in order to pass the soil bag through, so there is an effect of saving time and effort.

Further, a sprayed layer of mortar or concrete for fixing the soil bag and the holding frame is constructed only around the soil bag and the holding frame, leaving the planting opening provided on the top surface of the soil bag, It will not blow on any other slope. Therefore, it is less time consuming and more efficient than spraying the entire surface of the ground, and the labor costs and mortar or concrete spraying materials required for spraying work can be saved, leading to significant cost reductions.

Furthermore, as the slope other than the planting area is covered with netting, fallen leaves accumulate on the netting surface, which eventually becomes humus, and seeds scattered from the outside land on the humus layer and grow. As the years go by, the greening becomes deeper. In addition, the ivy planted through the planting opening of the sprayed layer and the opening at the top of the soil bag will surely spread through the net.
It can definitely flourish.

Furthermore, the netting stretched on the slope 2 other than the planting area is made of its own material and is made to fit into the ground through pegs, etc., so that it comes into close contact with the slope. Like netting, it can reliably prevent rock particles from collapsing and falling rocks, making it a new and useful greening method specifically for this type of hard rock slope.

[Brief explanation of drawings]

The drawings show an example of the greening structure on a hard rock slope according to the construction method of the present invention, in which Fig. 1 is a vertical cross-sectional view of the slope, Fig. 2 is a vertical cross-sectional view of a part of Fig. 1 enlarged, and Fig. 3 is a vertical cross-sectional view of the slope. 4 is a perspective view of a soil bag and a holding frame portion, and FIG. 4 is a longitudinal sectional view of a soil bag installation device according to a conventional construction method. 1... Net type. 2...A bag of dirt. 3...Holding frame. 4... Water drain pipe. 5...Mold member for forming a planting opening. 6...Mortar or concrete sprayed layer.
7...Shrubs, trees and ivy.

Claims (1)

[Claims] 1. Stretch a net closely along the surface of the ground, place a soil bag on the area of the net where planting is to be done, and hold it with a holding frame;
The soil bag is fixed to the slope together with the holding frame via anchor pins, and mortar or concrete is sprayed around the soil bag leaving an opening for planting on the top surface of the soil bag to create a spray layer. A method for greening hard rock slopes, which is characterized in that after forming a soil bag, plants are planted inside the soil bag through an opening in the soil bag that is aligned with the position of the planting opening on the top surface of the soil bag.