JP2001348874A - Vegetation base for protecting face of slope and work execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the erosion and outflow of soil and seeds caused by rainwater and form the ideal environment or the growth of plants with respect to air temperature and humidity of a face of a slope to create excellent soil for the growth of plants as a result of nourishing micro organisms and fungi by gradual decay. SOLUTION: A vegetation base body 1 is composed of a wire gauze 2 and a plurality of thinning blocks 3, 3, etc., arranged at appropriate spaces on an upper face 2A of the wire gauze 2 and fixed by driving U-shaped nails from the lower face side. A plurality of vegetation base bodies 1 manufactured in a factory are conveyed to a construction site, lined up on the face of slope and fixed by anchors. Soil is filled between the thinning blocks 3, 3, etc., uniformly to the height of the thinning blocks 3 on the vegetation base body 1 to form a vegetation soil layer 5. The vegetation soil layer 5 is formed of a mixture of soil, fertilizer, a sticker, and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for protecting a slope formed by civil engineering work, and more particularly to a slope protection vegetation base having excellent soil and vegetation fixation properties and a method of constructing the same.

[0002]

2. Description of the Related Art Conventionally, as a slope protection technique, there are known a method of spraying turf seeds on a slope, a method of laying a vegetation mat or a sheet on the slope, and a method of laying a turf mat.

[0003]

Among the above-mentioned prior arts, the method of spraying grass seeds on the slope has a drawback that the slope is not stable until the grass seeds grow and settle. Also, the construction method of laying vegetation mats (sheets) and turf mats takes days to settle on the slope, and during this time, the slope may be eroded by rainwater.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and can prevent erosion and runoff of soil and seeds due to rainwater, and a wooden block exerts a function of mitigating temperature and humidity on a slope. Therefore, it is suitable for the growth of vegetation, and the gradually decaying wooden blocks provide nutrients for microorganisms and fungi, so that the soil can promote the growth of vegetation. It is an object of the present invention to provide a vegetation base for slope protection that can be planned and a method for constructing the same.

[0005]

According to a first aspect of the present invention, which is configured to solve the above-described problems, a planar substrate and an appropriate gap are provided on the planar substrate. A vegetation base is composed of a plurality of standing and fixed wooden blocks, and a soil is filled between the wooden blocks of the vegetation base to form a vegetation soil layer on the planar base material. It consists of mixing or sowing seeds or transplanting plants.

[0006] The planar substrate may be formed of a metal net or a decomposable net.

The wooden block may be a column-shaped thinning material block formed by cutting the thinning material into rings.

[0008] Further, according to a fourth aspect of the present invention, a vegetation base according to the first aspect is fixed to a slope, and soil is filled between the wooden blocks of the vegetation base to fill the soil. To form a vegetation soil layer, mix or sow seeds in the vegetation soil layer, or transplant plants.

The vegetation base can be easily fixed to the slope by anchoring the vegetation base to the slope with an anchor, and the vegetation base can be securely fixed to the slope even against erosion of rainwater. can do.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the figure, reference numeral 1 denotes a vegetation substrate.
2 is a wire mesh as a planar substrate constituting the vegetation substrate 1,
The wire mesh 2 is made of a relatively fine wire mesh,
mm and 900 mm square. .. Indicate a plurality of thinned material blocks erected on the upper surface 2A of the wire mesh 2, and each of the thinned material blocks 3
Is formed by cutting a thinned wood having a diameter of about 90 to 110 mm into a round shape to a length of about 60 mm and forming a columnar shape.

A plurality of thinning material blocks 3, 3,... Having the above-mentioned shape are arranged on the wire mesh 2 at appropriate intervals, and a U-shaped nail 4 is cut from the lower surface 2B of the wire mesh 2. Block 3
Is fixed to the wire mesh 2 by driving it into the lower surface 3A (see FIG. 2). In the present embodiment, since the thinned wood block 3 is used for forming the vegetation soil layer 5 described later, it is preferable to form the thinned wood block 3 using a low-priced thinned wood such as a small diameter tree or a non-standard deformed tree. .

The number of the thinning material blocks 3 arranged on the wire mesh 2 may be determined so that the total area of the thinning material blocks 3 with respect to the area of the wire mesh 2 is about 60%. This is because when the number of the thinned wood blocks 3 is too large, the gaps between the adjacent thinned wood blocks 3 and 3 cannot be obtained, so that the soil necessary for growing the vegetation cannot be filled and the vegetation cannot be filled. Because they cannot take root. On the other hand, when the number of the thinned wood blocks 3 is small, the gap between the thinned wood blocks 3 is too large, so that the soil forming the vegetation soil layer 5 is likely to be eroded by rainwater and flow out. It is.

Reference numeral 5 denotes a vegetation soil layer formed by filling the gaps between the thinned wood blocks 3, 3,... With soil to a height substantially equal to the upper surface 3B of the thinned wood block 3. The vegetation soil layer 5 is made of soil containing soil, fertilizer, and adhesive. By sowing plant seeds 6, 6,... On the vegetation soil layer 5 and growing them, the plants are bred and the slope is greened.

Next, a construction method according to the present embodiment will be described. First, an appropriate number of thinned wood blocks 3, 3,... Are erected and fixed on a wire mesh 2 formed by cutting into a desired size at a factory to form a vegetation substrate 1. For this, the thinning material blocks 3 are arranged downward at appropriate intervals on a flat surface such as a factory floor, and the wire mesh 2 is put thereon, and the U-shaped nails 4 are driven into each of the thinning material blocks 3. Is formed. The vegetation base 1 in which the thinned wood blocks 3, 3,... Are integrated in this way is conveyed to the site and arranged on a slope, and an anchor is driven into the slope from above the wire mesh 2 of each vegetation base 1. Laying by doing.

The space between the thinning material blocks 3, 3 laid as described above is filled with soil to form a vegetation soil layer 5 having substantially the same height as the thinning material blocks 3. Then, by sowing plant seeds on the vegetation soil layer 5, construction of the slope protection vegetation base is completed.

According to this embodiment, since the slope is covered with the slope protection vegetation base, it is possible to prevent the slope where the soil is not sufficiently fixed from being eroded by rainwater. Also, since the vegetation soil layer 5 constituting the vegetation base for slope protection is held by a large number of thinned wood blocks 3, 3,.
It is possible to prevent soil and seeds from being eroded by rainwater and flowing out. In addition, since the thinned wood block 3 has water retention, it exhibits a function of mitigating changes in temperature and humidity on the slope, so that conditions suitable for growing plants can be maintained. Furthermore, since the thinned wood block 3 gradually becomes rotten and becomes a nutrient for microorganisms and fungi, the soil is formed in a nutrient-rich state, so that the growth of vegetation can be promoted.

Further, since the vegetation substrate 1 is fixed to the slope by an anchor, the laying operation is easy, and the wire mesh 2 used as the planar substrate is flexible and can adhere to the slope. Thus, the vegetation substrate 1 can effectively protect the slope against erosion by rainwater.

Further, by using the thinned wood block 3, the thinned wood can be effectively used. In particular, since the thinning material block 3 can use a low-priced thinning material having no use such as a small-diameter tree or a deformed nonstandard tree, it can be utilized and can be used with other slope protection means. The construction cost can be reduced in comparison.

In the present embodiment, the wire mesh 2 is used as the sheet-like base material. However, for example, a woven fabric or a net made of corrosive fibers may be used.

In the present embodiment, the seeds 6 of the vegetation are sowed in the vegetation soil layer 5. However, the seeds may be mixed in the soil in advance, or the vegetation seedlings may be seeded in the vegetation soil layer 5. It may be transplanted.

[0021]

The present invention has the following advantages because it is constructed as described above. (1) To prevent vegetation soil from being eroded by rainwater and flowing out at an early stage when the roots of the vegetation are not sufficient because the vegetation soil is maintained by filling between a number of wooden blocks. Can be. (2) During the growth of the vegetation, the wooden block functions to mitigate changes in the temperature and dryness of the slope, so that the vegetation growth environment can be favorably maintained. (3) In the latter stage when the plants grow and cover the slope, the decay of the wooden blocks progresses, and the supply of nutrients to the plants by fungi and microorganisms in the soil and the improvement of the soil are promoted. A favorable condition can be formed for breeding. (4) The vegetation base can be manufactured in a factory, and it is only necessary to lay it at the site, so that the workability is excellent and the construction period can be shortened. (5) Since the slope is covered with the planar substrate and the many wooden blocks, the slope itself can be prevented from being eroded by rainwater. (6) By using a thinned wood block as a wooden block, thinned wood can be effectively used. Moreover, since the wooden block only needs to be able to hold the vegetation soil, the thinning material block can be made of a low-priced thinning material whose use is limited, such as a small diameter tree or a deformed nonstandard tree. Such thinned wood can be further utilized. (7) By fixing the vegetation base to the slope with the anchor, the fixing operation of the vegetation base can be easily performed, and the vegetation base can be securely fixed to the slope even against erosion of rainwater. it can.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of a vegetation substrate according to an embodiment of the present invention.

FIG. 2 is a partial explanatory view showing a configuration in which a thinned wood block is erected and fixed to a wire mesh from below.

FIG. 3 is an explanatory view showing the constructed slope protection vegetation base with a part cut away.

[Explanation of symbols]

 Reference Signs List 1 vegetation base 2 wire mesh (planar substrate) 3 thinned wood block (wooden block) 5 vegetated soil layer 6 seed

Claims (5)

[Claims] 1. A vegetation base comprising a planar base material and a plurality of wooden blocks fixed on the planar base material with an appropriate gap therebetween, and cultivating soil between the plurality of wooden blocks. A vegetation soil layer is formed on the planar substrate by filling, and seeds are mixed or sown on the vegetation soil layer, or vegetation is transplanted with vegetation to provide a vegetation base for slope protection. 2. The vegetation base for slope protection according to claim 1, wherein the planar substrate is a wire net or a degradable net. 3. The vegetation base for slope protection according to claim 1, wherein the wooden block is a pillar-shaped thinning material block formed by cutting a thinning material into a circle. 4. A vegetated soil layer formed on a planar substrate by fixing the vegetation substrate according to claim 1 on a slope and filling soil between wooden blocks of the vegetation substrate. A method of constructing a vegetation base for slope protection, in which seeds are mixed or sown, or plants are transplanted. 5. The method according to claim 4, wherein the vegetation base is fixed to a slope by an anchor.