JPS5854214B2 - Ryotsukanotamenonorimenkohou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slope construction method for forming a slope suitable for greening by spraying a material such as fiber fill cement onto the slope.

Originally, slopes formed by civil engineering methods have soil that is not suitable for plant growth, and even if plants can be introduced and grown, the surface of the mountain or additional soil will be too thin before the plants take root. They are often destroyed by weathering, runoff, slipping, etc.

Slope stabilization construction methods that have been conventionally used for such slopes include stone paving, block paving, concrete frame work, block frame work, and concrete or mortar spraying.

All of these basic construction methods create conditions that are difficult for the plants introduced for greening to grow.

For the growth of green plants, soil stability, light, temperature, ventilation, water retention, nutrients, etc. must be appropriate.

Recently, a technique is known in which organic fibers such as sand and peat moss as a soil admixture are mixed into Portland cement to form fiber fill cement.

By using such fiber fill cement, it is possible to simultaneously protect slopes and grow plants.

Therefore, by using fiber fill cement, slopes can be suitably protected.

However, if fiber soil cement is simply sprayed on the slope, the wind and rain will substantially evenly infiltrate all surfaces, and the moisture evaporation due to solar heat will occur evenly on all surfaces, so the seeds will not grow. The drawback was that plants that had germinated after a long time could wither and die due to being washed away by wind and rain, or depending on the terrain or direction.

Therefore, it is an object of the present invention to provide a slope construction method for greening that combines the basic soil conditions necessary for the growth of green plants and prevents weathering.

According to this invention, sand and organic fibers as soil admixtures are mixed into Portland cement to create a fiberfill cement spraying material, and the fiberfill cement spraying material is sprayed onto the slope. In a slope construction method for forming a slope suitable for greening, the sprayed material is made into an uneven shape, and the concave portions and convex portions are each formed into a step-like waveform extending approximately horizontally.

The spraying method is superior in that the ground and sprayed mortar can completely adhere to each other.

In addition, fiber fill cement can satisfy both the growth of plants and the protection of slopes, making it extremely suitable as a spraying method for greening.

Therefore, in this invention, fiber fill cement means fiber fill cement and its equivalents that can grow plants and protect slopes.

A step-like waveform is formed in which the concave portions and convex portions extend almost horizontally (thus, the surface area of the sprayed material increases, and the moisture retention ability of the concave portions and convex portions can be expected to increase, thus improving ventilation and light reception. This improves the conditions, promotes seed germination, and facilitates the invasion of local plants, which has a remarkable effect on promoting greening.

The present invention will be described in detail with reference to the embodiments shown below. The cut or fill slope 1 shown in FIG.
- When spraying soil cement 2, spray surface 3
The cross section shown in FIG. 1 forms a waveform.

As is clear from the front view of FIG. 2, this waveform is such that each of the concave portions and convex portions extends substantially horizontally to form a step-like shape.

That is, the thickness of the fiber fill cement is not uniform, and the spraying is performed so that the thick part 4 and the thin part 5 extend in a contour line.

When implementing this invention, fiber fill cement serves both as a base for plant growth and as protection for slopes, and its standard composition is sand or sandy soil as the main component, with the addition of cement, fibers, greening base materials, etc. Since it is a mixture of seeds such as grasses, wildflowers, and trees depending on the purpose, the following is a preferred example of the blend.

Sand or sandy soil ioo~20okg/B (1,00
C) ~2,000 kg/rn') Admixture material
10~20kg/B (100~200kg/m8) Cement 1~3.
5 ky/B (10~35kg/m3) Seed 250~300 f? /B(2,5
~ 3kg/? ? Z3) As described above, according to the present invention, the spraying surface of the spraying material has the recesses,
Since the convex portions are each formed into a step-like waveform extending substantially horizontally, excellent effects can be achieved as described below.

(1) With regard to moisture, which is essential for plant growth, the expansion of the surface area of the greening base and its concave and convex portions allows rainwater to be retained more easily than on conventional smooth surfaces, thus solving the problem of rainwater retention on slopes.

(2) Grass growth on slopes The steeper the slope, the weaker the root growth and the thinner the root layer.
This wavy and stepped spraying can be called a kind of contour cultivation, making it easier for plants to grow and flourish.

(3) Regarding the invasion of local plants, if there are concave and convex portions in the greening base, it will naturally be easier to retain incoming seeds, and the degree of colonization in the slope will be extremely high.

This is also relevant to permanent greening through plant succession.

(4) Also, this wavy/step-like modeling effect is remarkable in preventing erosion caused by rainwater.

In other words, rainwater seeping into the slope is guided to the convex part by the concave part, and the flow velocity of surface water is moderated by the concave part and the convex part.
This is effective from a forest management perspective.

(5) Fiberfill cement stabilizes the soil due to its adhesion and provides appropriate light, temperature, ventilation, water retention, and nutrients, so it can simultaneously support plant growth and protect slopes.
In addition, slopes can be suitably protected from the standpoint of disaster prevention.

In carrying out the present invention, it is also possible to plant plant seedlings here and there on the slope and apply the construction method of the present invention to the remaining part of the slope.

[Brief explanation of the drawing]

FIG. 1 is a sectional view taken along the line II in FIG. 2 of a slope surface after spraying using the slope construction method of the present invention, and FIG. 2 is an orthogonal view of the slope surface. 1... Slope surface, 2... Fiber fill cement, 3... Shot surface, 4... Thick part, 5... Thin part. .

Claims (1)

[Claims] 1 Mix sand and organic fibers as soil admixtures into Portland cement to make a fiber fill cement spray, and then spray the fiber soil cement onto the slope to create a slope suitable for greening. In the slope construction method, the sprayed material is made into an uneven shape, and the recesses,
A slope construction method for greening that is characterized by forming a step-like waveform in which each convex part extends almost horizontally.