JPS6138024A - Formation of artificial greens-planting ground for cut slope - Google Patents

Abstract

PURPOSE:To prevent the erosion of surface soil layer as well as protect the fine roots of plants by a method in which base materials formed by packing dry peat moss into net cylinders of fine mesh and closing them are laid on a slope, and surface soil layer is formed on the base materials. CONSTITUTION:Dry peat moss 2 is packed into net cylinders of fine mesh to form closed bags of a thickness of several cm as base elements 3. The base elements 3 are laid on a cut slope 4, e.g., rockbed, etc., and fixed with anchor pins 7 to form the base ground layer 5. A rough-mesh net 9 is fixed with anchor pins 8, a rope 12 is laid on them, and solid fertilizer 10, soil, and seeds 11 of turf, etc., are sprayed onto them to form a surface oil layer 6. Since the base elements 3 are soft, they can closely adhered to the undulatory surface of the slope 4. Also, since spring water and rain water on the slope 4 can pass through the base elements 3 of water-permeable peat moss and freely flow down, the erosion of the surface soil layer 6 can be prevented and the fine roots of plants can be protected because of being entangled with peat moss 2.

Description

[Detailed Description of the Invention] (Object of the Invention) The present invention relates to a means for protecting a slope formed by cutting a rock or semi-rock by planting vegetation on the slope. It is possible to create artificial ground for vegetation even on slopes, and at the same time, the created artificial ground can be firmly established on the slope, and moreover, it is possible to create a method that can economically construct such artificial ground. Its purpose is to provide.

For slopes created by cutting or excavating the ground, it is generally necessary to take some kind of protection measures to prevent rocks from falling or earth and sand from being washed away due to collapse of the slope. The vegetation method of planting grass and other vegetation on slopes is one such protection method, and is particularly recommended from the standpoint of environmental greening.

However, if the cut slope is bedrock or semi-rock, there is insufficient soil necessary for vegetation, and construction is particularly difficult if the slope is steep. Figures 2 to 6 illustrate known vegetation construction methods for such soilless slopes (including cases where there is a small amount of soil).

(a) Law (glue) frame construction method A method of constructing a concrete frame, aluminum frame, etc. on the slope.
1 and add soil between the frames to create the vegetation area A2, but the construction cost is high and, like concrete, when it is constructed on site, the construction period is unavoidably long.

(b) Heavy-duty spraying method A wire mesh b1 is stretched on the slope, the wire mesh B1 is fixed with an anchor bin b2, and additional soil is sprayed, but since the wire mesh does not fit well with the slope, the soil is washed away by rainwater. Very easy to wash away.

(C) a! ! Raw sandbag construction method Sandbags C1 filled with soil containing seeds such as turfgrass and fertilizer in jute bags etc. are piled up one after another from the bottom of the slope, and are placed in anchor bin C.
Method 2 fixes sandbags in place, but since it involves transporting heavy sandbags to a high place, it is the least efficient method and is difficult to perform except in a very limited area of the slope.

(d) Carpentry method, trench method Holes d1 and contour grooves (not shown) are drilled here and there on the slope, and additional soil d2 is poured into these holes and grooves, but it is difficult to plant grass etc. densely, and it is hard. It takes time to dig through the bedrock, and if the holes and trenches are shallow, they can easily be washed away by rainwater.

(In the improved construction method of e> step method (b), the wire mesh e1 is stretched slightly above the slope, and then ridges of soil C2 are applied in contour lines, but the soil is completely lifted from the slope q) This has the disadvantage that the soil is less likely to settle and more soil is washed away.

The known vegetation construction methods for soilless slopes have been briefly described above, but with the exception of the vegetation sandbag construction method (C), the soil layer does not adapt well to the slope surface, so turfgrass etc. cannot grow and spread their roots. Even after the soil is in a stable condition, the soil layer itself is likely to be washed away along with the plants by strong rainwater.

The inventor has experimented with all known methods for constructing vegetation on soilless slopes, keenly aware of their shortcomings, and has attempted to make drastic improvements.

(Structure of the Invention) This invention will be explained below with reference to FIGS. 1, 3 to 5. 3 is a basic element used in the method of this invention, in which dried peat moss 2 is placed in a fine mesh tube 1. Fill and close;
It is several centimeters thick. According to the examples shown in Figs. 3 to 5, the dimensions of the basic element 3 are as shown in Fig. 3, and it can usually be stored or transported in a roll-like packaging as shown in Fig. N5. can. To keep the thickness even, it is a good idea to fasten the front and back fabrics at certain points on the mesh tube.

According to the method of this invention, referring to FIG. 1, a ground base layer 5 is formed by laying and fixing the above-described basic bodies 3 in parallel to the cutting slope 4, and the ground base layer 5 thus formed is A soil layer 6 is formed on top of the soil layer 5.

An anchor bin 7 or the like may be used to fix the basic body 3 to the slope. In order to securely fix a large number of the basic bodies 3 arranged side by side, for example, a nylon net, etc.
It is preferable to cover these basic bodies 3 with a coarse mesh 9 made of corrosion-resistant synthetic fiber and fix this coarse mesh 9 with anchor bins 8. Furthermore, by stretching nylon ropes 12 vertically and horizontally from the top of the coarse mesh 9 at intervals of 1 to 2 m,
The ground base layer 5 is more firmly fixed to the cutting slope 4.

In order to form the soil layer 6 on the ground base layer 5, normal embankment can be performed, but seeds 11 such as turf grass mixed in the soil together with an appropriate solid fertilizer 10 can be sprayed with water. At that time, it is desirable to form the soil layer 6 so that the thickness of the completed soil layer 6 is approximately 3 cm on average.

Now, the method of this invention is as described above, and the vegetated bed after construction consists of the ground base layer 5 laid and fixed on the slope and the soil layer 6 formed on this. As described above, the ground base layer 5 is formed of a large number of basic bodies 3 made by filling a fine mesh tube 1 with dry peat moss 2 and making it into a closed bag several centimeters thick. The soil layer 6 formed on the ground base layer 5 is extremely lightweight and is extremely easy to transport manually and to lay and fix on a slope.
Compared to the known construction methods mentioned above, the construction period is significantly shorter and the construction requires less manpower. The main materials of the basic body 3 that form this ground base layer 5 are a fine mesh tube and peat moss, and the former is currently produced in large quantities as a mesh tube for packaging fruits, etc. In that case, such mesh tubes are made of nylon or polyethylene, which are water resistant, weather resistant, and corrosion resistant, so they can maintain their shape for a long time even in the soil.

In addition, peat moss is in almost inexhaustible supply mainly in Hokkaido, and currently it is left alone without any major use other than being used for breeding indoor ornamental plants, so this invention opens the door to the utilization of dormant resources. It also has meaning.

Peat moss is not only flexible and has excellent water retention properties, but also
It has high water permeability and air permeability, is resistant to frost heave, and contains several tens of percent humus, so it has a soil improvement effect, and also has the function of entwining and protecting grass roots and promoting their growth.

Therefore, when the basic body 3 consisting of a closed mesh tube filled with peat moss is laid on a slope, since the basic body 3 is flexible, it will adapt to the unevenness of the ground and adhere tightly even if the slope is quite rough. do. Because of the excellent water permeability of peat moss, the often encountered spring water seepage from the slope and the flow of rainwater on the slope freely pass through the base body 3, so it can be used as the upper layer of the ground base layer 5. Erosion of flowing water into the formed soil layer 6 remains minimal. If the vegetated plant grows and its fine roots grow,
The fine roots are protected by being entangled in peat moss, and the water retention properties of peat moss ensure that the fine roots are supplied with plenty of water, and the good aeration provides a sufficient supply of oxygen. They have more opportunities to reach the crevices of the soil and become established, and in this way the plants themselves contribute to the establishment of the soil layer into the bedrock.

(Effects of the Invention) That is, according to the present invention, it becomes extremely easy to create a vegetation base on a slope by cutting rock, etc.
Less labor is required during construction, and the construction period is shorter. Furthermore, since the base of the vegetation base is mainly peat moss, the resources required for cultivation and transportation costs are small. Furthermore, due to the excellent water permeability of the ground base layer 5, erosion of the soil layer by spring water and rainwater is prevented. Furthermore, the water retention, air permeability, and fertilizing properties of the soil substratum 5 promote the growth of vegetation, and as a result, fine roots penetrate into rock cracks, etc.
The establishment of the soil layer by the plants themselves is promoted. Thus, according to the present invention, a vegetative base with a high fixation property can be created very economically on a cutting slope such as a bedrock, thereby greatly contributing to the protection of the slope and the greening of the environment.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an example of a vegetation base created by the present invention, with the main parts cut out, Fig. 2 is an explanatory diagram of a known base for a soilless slope, and Fig. 3 is a basic basic body. A perspective view, FIG. 4 is a partially sectional side view, and FIG. 5 is a view of the package. 1 is a mesh tube, 2 is a dried peat moss, 3 is a basic body, 4 is a cutting slope, 5 is a ground base layer, 6 is a soil layer, 7, 8 wire mesh, b
is an anchor bottle, C1 is a sandbag, C2 is an anchor pin,
dl is a hole, d2 is soil, el is a wire mesh, and C2 is a ridge. Patent applicant Gen Shiba Co., Ltd. Figure 1

Claims (1)

[Claims] Fill a fine mesh tube 1 with dry peat moss 2 to a thickness of several cm.
A ground base layer 5 is formed by laying and fixing the basic body 3 formed in a closed bag on the cutting slope 4,
A method for creating an artificial vegetation base for a cutting slope, characterized by forming a soil layer 6 on top of the slope.