JPS5855293B2 - How to form a thick vegetation base - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vegetation construction method that prevents the vegetation base material from slipping down and prevents the sprayed vegetation base material from flowing away due to rainfall when the vegetation base material is sprayed in a thick layer onto a slope. It is something.

Conventionally, on slopes where it is difficult for plants to grow due to hard soil (including soft rock), harmful soil, or high pH, seeds and planting soil can be used as a new vegetation base on the slope. A vegetation construction method has been adopted in which chemical fertilizers, organic fibers, compost, etc. are appropriately mixed and sprayed to a thickness of 1 to 2 cm.

However, a vegetation base with a thickness of 1 to 2 cm is not sufficient for the growth of plants, and they often die within a short period of time.

Therefore, it was considered to thicken the vegetation base layer, but even if the vegetation base layer is hardened, if the thickness exceeds 2 cm, the vegetation base material will slip, and it will not be able to adhere to the slope, resulting in a slope that is more than 10% steep. However, it was difficult even with a thickness of 1c.

Also, when it rains, the rainwater flows down the slope and becomes a large amount of running water, causing gall erosion on the surface of the vegetation base material that is sprayed onto it, and eventually the vegetation base material is washed away, resulting in a series of old repairs.

The present invention uses perforated pipes that are lightweight, easily adapt to the unevenness of the slope, and can remove rainwater that causes the runoff of vegetation base material.Thick layers of vegetation can be created by arranging multiple rows of perforated pipes in approximately contour lines on the slope. The aim is to form a base layer.

Examples of the present invention will be described below.

The perforated pipe 2 used in the present invention is preferably a pipe in which one or several rows of holes 5 are provided in the longitudinal direction of the pipe so that at least half of the circumference of the pipe is internally impermeable, and the diameter is 3 to 10.
PVC pipes, polyethylene pipes, and corrugated pipes with a diameter of 1.5 cm are preferable, and the thickness of the pipe should be 1 to 3 cm so that it can easily conform to the unevenness of the slope.

The diameter of the pipe varies depending on the thickness of the vegetation substrate to be sprayed, but if the vegetation substrate is 3 cm thick, the diameter should be 4 to 4 cm.
When forming a vegetation base with a 5cm pipe and a 6cm thickness, use a pipe with a diameter of 7 to 8cm so that running water can easily flow into the hole in the pipe, and when installing the pipe, it should be installed on the slope below the pipe. Select pipes that are semi-impermeable to prevent spills.

Next, a method of installing the above-mentioned pipes on a slope will be explained.

Figures 1 and 2 show pipes placed on slope 1 with anchor pins at intervals of 1 to 3 m in approximately contour lines with a slight inclination to the left or right.
This shows a method in which the pipe is installed using an anchoring device such as a U-shaped nail, and the end of the pipe is placed outside the slope where the vegetation is to be constructed, in a place where the vegetation is thick.

FIG. 3 shows a method in which when the slope has a long extension, the slope is inclined left and right from the center line of the slope extension in the same manner as described above.

In addition, if a drainage ditch is provided in the vertical direction of the slope, the pipe should be arranged so that it flows into the drainage ditch, and the end of the pipe should look into the drainage ditch.

When installing the pipe, the pipe is arranged so that the hole faces the mountain side and the impermeable part contacts the slope.

Incidentally, in order to prevent earth and sand from flowing into the pipe hole, as shown in FIG. 4, water-permeable mats such as sand mats or palm mats may be wrapped around the pipe with a wire 7 or the like.

Once the above work is completed, mix the seeds, mountain soil, organic fibers, compost, and chemical fertilizer soil conditioners on the entire surface of the slope, excluding the pipe section, and spread it evenly over the entire surface of the slope to a thickness of 3 to 6 cm. to form a vegetation base 4.

In this case, there are two methods: one method is to mix and spray the above-mentioned vegetation base materials with a power sprayer to form a vegetation base, and the other is to carry the mixed vegetation base materials up to a slope with bricks, cableways, etc. and throw them there to form a vegetation base. There is.

In addition, on the mountain, organic matter alone or in a mixture is carried up by brick cableways, etc., and in some cases, it is mixed with fertilizer and
There is also a method of forming a vegetation base with a thickness of 6cff:J and then spraying seeds over the entire surface.

If a film-forming agent such as asphalt emulsion or vinyl acetate emulsion is spread on the vegetation base formed as described above, or if a polyethylene net or the like is stretched, the earth and sand blocking effect will be further enhanced.

The above is an embodiment of the present invention, and since the present invention provides a perforated pipe with a semi-impermeable semi-interior that is lightweight and easily adapts to the unevenness of the slope, it is possible to use a thick layer of vegetation base material. A stable and thick vegetation base can be formed without causing any slippage even when the soil is added.

In addition, the flow of water from rainfall is allowed to flow into perforated pipes, which are semi-impermeable, and are arranged in a contour line with a slight inclination to the left and right, and are installed in contact with an impermeable slope. The water will flow through the pipe to the end of the pipe without flowing onto the lower slope of the hole pipe, and will be dispersed to areas with thick vegetation on the left and right sides of the slope where the vegetation work is to be constructed. Alternatively, as described above, the water can be allowed to flow down into the vertical drainage ditch through the end of a perforated pipe extending into the vertical drainage ditch.

In this way, rainfall does not flow down the slope in large quantities, so the vegetation base material is not washed away and the vegetation can grow without any problems.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the perforated pipes arranged in a substantially contoured manner so as to be inclined to the right toward the slope. Fig. 2 is a front view showing the perforated pipes arranged in approximately contour lines so as to be inclined to the left toward the slope. FIG. 3 is a front view showing the perforated pipes arranged in approximately contour lines from the center of the slope extension to the left and right. FIG. 4 is a partially cutaway perspective cross-sectional view of a place where a perforated pipe is placed and a vegetation base material is introduced. FIG. 5 shows a method for installing a perforated pipe whose inside is at least half impervious to water on a slope, and is a perspective view of the pipe with the pipe partially cut away. In Figure 6, 1 is a slope, 2 is a perforated pipe, 3 is an anchor pin, 4 is a vegetation base, 5 is a hole, 6 is a permeable mat, and 7 is a wire.

Claims (1)

[Claims] 1. A perforated pipe with a flexible slope and an impermeable half of the perforated pipe is laid out in approximately contour lines with a slight inclination to the left and right so that the impermeable part is in contact with the slope. A method for forming a thick vegetation base, which is characterized by applying clay base materials such as seeds, soil, and fertilizer to an even thickness over the entire slope surface, excluding the perforated pipe area.