JP2001131984A - Vegetation base material for greening of slope face, and slope face greening construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide vegetation base material for greening of a slope face, and a slope face greening construction method using the vegetation base material in which water retentivity is maintained favorable till arborous seedlings are sufficiently grown, in which application of pressure of weeds on the arborous seedlings is prevented during the while, and in which the ground of the whole installation range of the base material becomes an elongation range for the roots of the arborous. SOLUTION: This vegetation base material comprises a weeding mat 2 stretched on a slope face N, and a vegetation bag 4 installed on a slope frame 3 on the wooding mat surface side, the vegetation bag 4 comprises a water-proof sheet 9 comprising two vegetable fiber sheets 6, 7 jointed with each other by polyethylene oxide 8, a planting opening 13 for an arborous seedling 12 is formed in this vegetation bag 4, vegetation base material 5 is filled, the weeding mat 2 is formed of such material that root of the arborous can pass, and as the vegetation bag 4 is installed on the slope frame 3, the weeding mat 2 is formed in such sizes as to overhang above the vegetation bag 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vegetation base material for slope revegetation used for revegetation of a slope surrounded by a slope, and a method of revegetation of a slope using the vegetation base material.

[0002]

2. Description of the Related Art Generally, a grid-like method frame is constructed on a slope surface of a hillside or a slope surface formed along with a road construction by a soil cleat method, a free frame method, or the like. For example, tree seedlings raised in a plastic pot (shrubs such as cedars, tovera, sharinbai, rat rodent, and seedlings of vines such as ivy and hedera) are selected on the cut slope. In the following, these are referred to as Kimoto seedlings.) To green the slope.

[0003] As a vegetation base material used for greening the slope, there is a vegetation base material disclosed in Japanese Patent No. 2789460. The vegetation base material includes a net-like portion having a net-like pocket for planting seedlings, The bag is formed by filling a vegetation base material into a bag formed of a waterproof sheet-like portion connected to the lower end thereof. According to the vegetation base material having such a configuration, seedlings are planted in a net-like pocket. Thus, the slope can be satisfactorily greened by a small work of setting the slope on the slope.

[0004] That is, according to the vegetation base material having the above structure, the planting posture of the seedlings is stabilized, and the presence of the net-like portion allows the roots to elongate on the slope to be satisfactorily extended. Since the sheet portion maintains the water retention effect, a good planting base is formed on the slope, whereby the greening of the slope is easily and satisfactorily achieved.

[0005]

However, in the vegetation base material having the above-described structure, the extension area of the roots of the tree to the slope ground is limited to the net-like portion at the upper part of the bag body. If the net-like part expands unnaturally, or if this net-like part is widened, the water retention area by the waterproof sheet part becomes narrow, which is the most important until the tree seedling grows sufficiently. A problem arises in terms of water retention.

[0006] In addition, when weed species fly into the net-like portion on the upper part of the bag or the vegetation base layer sprayed on the slope, and when the weeds infest here, if the woody seedlings have sufficiently grown by then, Although there is no problem, between young seedlings, the woody seedlings suffer from poor growth due to the pressure of weeds, and there is still room for improvement in this respect.

[0007] The present invention is based on the point that it takes a considerable growth period before the roots of the tree grow on the slope ground. The purpose of this study was to focus on the fact that the book absorbs sufficient moisture from the ground, so that even if the water retention of the vegetation base material is reduced, this does not pose a problem. Until the plants grow sufficiently, water retention is maintained well, and during this time, weeds are prevented from pressure on the tree seedlings. It is an object of the present invention to provide a vegetation base material for slope revegetation to be an area and a slope revegetation method using the vegetation base material.

[0008]

The technical means adopted by the present invention to achieve the above object are as follows. That is, the vegetation base material for slope greening according to the present invention is composed of a weedproof mat stretched on the slope and a vegetation bag installed on a lawn frame on the surface side of the weedproof mat. 2. A planting sheet comprising a waterproof sheet made by joining two vegetable fiber sheets with polyethylene oxide, and a reinforcing net made of chemical fiber. An opening for planting a tree seedling is formed in the vegetation bag. While filling the wood, the grass-proof mat is made of a material that can pass through the roots of the tree, and the grass-protection mat is overhanging the vegetation bag with the vegetation bag installed on the legal frame. It is characterized in that it is formed in (1).

The above-mentioned polyethylene oxide is a polymer flocculant which is once dissolved in water to form a sizing agent, and the two vegetable fiber sheets are stuffed together to form a waterproof joint. For example, there is Coagulant A (trade name) manufactured by Meisei Chemical Industry Co., Ltd.

[0010] According to the vegetation base material having the above structure, a vegetation protection mat is stretched on the slope, and a vegetation bag is placed on a lawn frame on the front side of the vegetation prevention mat. The foundation is formed on the legal framework, and after the installation of this vegetation bag,
Alternatively, before installing the vegetation bag, the tree seedlings are planted on the vegetation base material through the seedling planting opening in advance to green the slope, and the vegetation bag has a waterproof property as a whole. Thus, drying of the vegetation base material filled in the vegetation bag is prevented.

The fact that the vegetation bag has waterproofness means that it is difficult for the vegetation bag to grow on the surface of the vegetation bag. There is no room for weeds to infiltrate around the tree seedlings because they are covered with the weed-proof mats. And grow well.

On the other hand, the vegetation bag has a triple strong structure composed of two vegetable fiber sheets and a reinforcing net,
It is excellent in handling and can improve workability.

[0013] The vegetable fiber sheet eventually corrodes and assimilates with the vegetation base material, and the polyethylene oxide for bonding collapses and loses its shape. Because the roots of the tree are sufficiently rooted in the planting base, the planting base is effectively prevented from collapsing or losing.

[0014] Corrosion of the vegetable fiber sheet means that the entire area where the vegetation bag is installed becomes an area where the roots of the woody roots extend to the ground. Since the roots of the tree are allowed to pass through, the roots of the tree are rooted on the slope ground in a natural manner without any bias. Although damaged, Kimoto is able to grow well with sufficient absorption of moisture from the slope ground.

[0015] Preferably, the waterproof sheet is made of a material that allows the germination of herbaceous seeds, and the inner surface of the vegetation bag (preferably the seeds of grass seeds of short grass) is supported. Item 2), which makes it difficult to grow flying weed species on the surface of the vegetation bag, but the herbaceous seeds germinate and grow from inside the vegetation bag, and the roots of the herbaceous plant retain the planting base. In addition, collapse and runoff of the planting base when the vegetable fiber sheet is corroded can be more effectively prevented, and the scenery can be improved.

It is also preferable to make the weed control mat water-retentive (claim 3), whereby the loss of water retention due to corrosion of the vegetable fiber sheet can be compensated for. By wrapping the reinforcing band around the bag (claim 4), the vegetation bag can be made stronger, and furthermore, a net-shaped seedling planting pocket is continuously provided inside the vegetation bag in connection with the seedling planting opening. Then (claim 5),
Because the movement of the root of the seedling is suppressed by the pocket,
The planting posture of the seedlings can be stabilized.

The slope greening method according to the present invention is described in claim 1.
The method is performed using the vegetation base material described in any one of (1) to (5), wherein a weedproof mat of the vegetation base material is stretched on a slope, and at least a lower side of the weedproof mat and a slope It is characterized by the fact that humus is filled in between, and the vegetation bag is placed on the lawn on the surface side of the weed prevention mat.

The tree seedling is planted on a vegetation base material in advance through a seedling planting opening of a vegetation bag, or after the vegetation bag is placed on a legal frame, the plant is planted on the vegetation base material. ,
These planted tree seedlings grow well on a planting base that maintains a good water retention effect without receiving pressure from weeds, and eventually the roots of the tree are evenly distributed on the slopes. The tree will grow well with sufficient absorption of moisture from the ground.

In the mulch layer filled between the weed control mat and the slope, nitrogen-fixing bacteria grow and become nitrogen fertilizer indispensable for the growth of the tree seedlings, thereby reducing fertilization costs. In this case, the mulch may be disposed between the weed prevention mat and the vegetation bag, but the installation work of the vegetation bag becomes complicated, or the mulch is filled in the vegetation bag. Although it is also preferable, the vegetation bag becomes larger and heavier and the handling becomes worse, so the mulch is filled between the weed control mat and the slope, Accordingly, a small amount of mulch may be mixed with the vegetation base.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an initial state of greening of the slope N by the vegetation base material 1. The vegetation base material 1 includes a weedproof mat 2 stretched on the slope N and the front side of the weedproof mat 2. And a vegetation bag 4 installed on the legal frame 3 of the above.

The above-mentioned vegetation bag 4 is entirely waterproof and is filled with a vegetation base material 5 for forming a planting base, and is constructed as follows. That is, as shown in FIG. 3, two vegetable fiber sheets 6 and 7 are joined by polyethylene oxide 8 to produce a waterproof sheet 9, and the inside of the waterproof sheet 9 is made of chemical fiber. Are arranged to form a bag 11 having a rectangular parallelepiped shape as a whole.

An opening 13 for planting a tree seedling 12 is formed in the upper surface 11a and the outer surface 11b of the bag 11, and a net-like shape is formed on the inner side of the bag 11 in connection with the planting opening 13. The seedling planting pockets 14 are continuously provided, a reinforcing band 15 is wound around both sides of the planting opening 13, and the inside of the bag body 11 is filled with the vegetation base material 5 through, for example, a zippered opening (not shown). I have.

In this embodiment, a jute cloth and a thin cotton sheet are selected as the two vegetable fiber sheets 6 and 7, for example, the sheets 6 and 7 having the jute cloth on the outside.
The herbaceous seed is allowed to germinate in the joined state. Before filling the bag 11 with the vegetation base material 5, the inside of the bag 11 is coated with a water-soluble material such as polyvinyl alcohol. And herb seeds (preferably, seeds of grass seeds).

Further, as the reinforcing net 10, a corrosion-resistant net made of polyethylene, polypropylene or the like having a mesh size of 2 to 3 mm × 2 to 3 mm is selected. Is selected to form a tube.

On the other hand, the weed control mat 2 is made of a material that allows the roots of the tree to pass when the tree seedling 12 grows, and is made of, for example, a nonwoven fabric or felt. The surface exposed to the water presents a dry state, making it difficult to germinate and grow the herbaceous seeds. The surface contacting with the vegetation bag 4 and the humus soil described below has water retention, and the vegetation bag 4 3, it is formed in a size protruding above the vegetation bag 4.

The vegetation base material 5 filled in the bag 11 is basically composed of a growth base, a land conditioner, an organic fertilizer and the like. For example, peat moss, coconut fiber, kanuma soil, zeolite, charcoal powder,
It is suitably selected from fertilizers and the like, and preferably contains humus. Further, it is also preferable to appropriately mix granular styrofoam as a lightweight growth material having an effective action for plant growth.

A method of greening the slope N with the vegetation base material 1 having the above configuration will be described. First, as shown in FIGS. 1 and 2, a grid-like method frame 3 is constructed on a slope N by a soil cleat method, a free frame method, or the like.

The scale of the normal frame 3 is set according to the degree of inclination of the slope N. In this embodiment, the height H and the width W of the normal frame 3 are each 300 mm, and the grid of the normal frame 3 is used. Is 1700 mm (H1) x 1700 mm (W
Assuming that 1) and three vegetation bags 4 are installed on the vertical frame 3 in the cross beam direction, the vegetation bags 4 are 350 mm high (H2) × 500 mm wide (W2) × thick. 1
It is manufactured to 70 mm (T).

Next, the grass-proof mat 2 is stretched on the slope N surrounded by the legal frame 3 in a lattice shape. The two grass-proof mats 2 are bent toward the legal frame 3 side. And the overhang dimension L of the vegetation bag 4 is 60
0 mm, leaving the upper method surface N of the grass-proof mat 2 as bare ground, 850 mm wide × about 1120 m long
m, and the upper half of the grass-proof mat 2 is fixed to the anchors 16, 16 at a pitch P of, for example, 500 mm.
To fix to the ground.

Then, the lower part of the weed control mat 2, specifically, between the installation area of the vegetation bag 4 and the slope N, so as to exhibit a triangular shape in a longitudinal side view, that is, the slope of the slope N. The humus (preferably mixed with a highly active nitrogen-fixing bacterium) 17 is filled to alleviate the corners, and the vegetation bag 4 is placed facing the filling area of the humus 17,
At this time, if necessary, a filling 18 such as humus is provided in a triangular space formed on the lower side of the vegetation bag 4, or the vegetation bag 4 is deformed so as to crush the triangular space. The vegetation bag 4 is fixed to the ground by the anchor 19.

Next, for example, a standard vinyl pot 20
The tree seedling 12 raised by the above method is taken out of the pot 20 and the tree seedling 12 is planted in the seedling planting pocket 14 of the vegetation bag 4. Is selected, it is planted in the seedling planting pocket 14 on the upper surface 11a of the vegetation bag 4, and when a vine plant such as hederas or ivy is selected, it is placed on the outer surface 11b of the vegetation bag 4. It is planted in the seedling planting pocket 14.

Further, if necessary, as a seedling to be planted in the seedling planting pocket 14 of the upper surface portion 11a, a middle or high tree seedling such as rowan, arakashi, yamamomiji, and bayberry is selected, and the seedling to be planted in the seedling planting pocket 14 of the outer surface portion 11b. As a method, shrub seedlings such as shrubs, cedars, and tovera may be selected.
Planting No. 2 is completed by simply inserting the seedling with floor soil taken out of the plastic pot 2 into the pocket 14 as it is, and the woody seedling 12 planted in the pocket 14 is moved by the pocket soil. Since the plant 14 is suppressed, the planting posture of the tree seedling 12 becomes stable.

The tree seedling 1 in the seedling planting pocket 14
Planting 2 is not limited to after the installation of the vegetation bag 4, but before the installation of the vegetation bag 4
4 and the vegetation bag 4 may be placed on the legal frame 3. These plantings may be used in combination, for example, for a vine plant seedling, it may be changed after the vegetation bag 4 is placed. It is possible.

According to the above-mentioned greening method, since the entire vegetation bag 4 has waterproofness, drying of the vegetation base material 5 filled in the vegetation bag 4 is effectively prevented, and Since the weed control mat 2 has water retention, the mulch 1
Drying of 7 is also effectively prevented, and a good planting base that maintains a high water retention effect is formed on the slope N.

Since the vegetation bag 4 has waterproof properties, it is difficult for the vegetation bag 4 to grow on the surface of the vegetation bag 4. Therefore, the tree seedling 12 grows well on the planting base having a high water retention effect without receiving pressure from weeds.

On the other hand, the herb seed a carried on the inner surface of the vegetation bag 4 grows by germinating through the waterproof sheet 9, and the herb roots hold the planting base. The vegetable fiber sheets 6 and 7 eventually corrode, and the polyethylene oxide 8 for bonding collapses and loses its appearance. However, as described above, the herbaceous roots hold the planting base, and The reinforcing net 10 made of steel remains, and during this time, the woody seedlings 12 grow, and the roots of the woody tree are sufficiently rooted on the ground of the slope N through the planting base and the weedproofing mat 2. Tensioning effectively prevents collapse and runoff of the planting base.

In the packed layer of the mulch 17 between the weed control mat 2 and the slope N, nitrogen-fixing bacteria grow and become nitrogen fertilizers indispensable for the growth of the tree seedling 12. As a whole, according to the above-mentioned slope greening method, as shown in FIG. 4, the planting base is greened early by the herbaceous seeds a, and the greening of the slope N is realized by the subsequent growth of shrubs, Further, the vegetation bag 4 and the sill frame 3 are covered by the growth of the vine plants, and the entire greening of the slope N is realized at an early stage.

The above-described setting of numerical values such as the size of the slope N and the shapes and dimensions of the vegetation bag 4 and the weed control mat 2 is merely an example, and the present invention is not limited to this. Instead, for example, a large vegetation bag 4 is formed, and two of the vegetation bags 4 are installed on the vertical frame 3 in the cross beam direction. 2 may be stretched so as not to leave bare ground.

Further, it is not essential that the herbaceous seeds a be supported on the inner surface of the vegetation bag 4 and that the pockets 14 are continuously provided in the seedling opening 13. It goes without saying that it is possible.

[0040]

As described above, according to the present invention,
Until the tree seedlings grow sufficiently, water retention is maintained well, and during this time, pressure on the tree seedlings by weeds is prevented. The present invention provides a vegetation base material which is very suitable for the revegetation of a slope, which is a root elongation area, and a revegetation method for a slope using the vegetation base material.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a greening method of a slope using a vegetation base material.

FIG. 2 is a front view of a slope showing an initial state of greening by a vegetation base material.

FIG. 3 is a perspective view of a vegetation bag with a part taken out and shown in an enlarged sectional view.

FIG. 4 is a perspective view of a slope showing a greening situation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vegetation base material, 2 ... Weed prevention mat, 3 ... Legal frame, 4 ... Vegetation bag, 5 ... Vegetation base material, 6, 7 ... Vegetable fiber sheet, 8 ...
Polyethylene oxide, 9: waterproof sheet, 10: reinforcement net, 13: seedling planting opening, 14: seedling planting pocket, 15: reinforcing band, 17: humus, a: herbaceous seed, N: slope.

Claims (6)

[Claims] 1. A weed-proofing mat stretched on a slope and a vegetation bag installed on a lawn on the surface of the weed-proofing mat. A sheet having a waterproof property bonded by an oxide, and a reinforcing net made of chemical fiber. An opening for planting a tree seedling is formed in the vegetation bag, and a vegetation base material is filled. Is made of a material that allows the roots of the tree to pass through, and in a state where the vegetation bag is installed on the lawn frame, the grass-proof mat is formed so as to protrude above the vegetation bag. Vegetation base material for slope greening. 2. The vegetation for slope revegetation according to claim 1, wherein the waterproof sheet is made of a material that allows the seeds to pass through the herbaceous seeds, and the herbaceous seeds are supported on the inner surface of the vegetation bag. Base material. 3. The vegetation base material for slope greening according to claim 1, wherein the weed control mat has water retention. 4. The vegetation base material for slope greening according to claim 1, wherein a reinforcing band is wound around the vegetation bag. 5. The vegetation base for slope revegetation according to claim 1, wherein a net-like seedling planting pocket is continuously provided inside the vegetation bag in connection with the seedling planting opening. Wood. 6. A vegetation base material according to any one of claims 1 to 5, wherein a weed-proof mat is stretched on a slope, and at least a lower side of the weed-proof mat and a slope. A vegetation bag is filled in between the mulch soil and the vegetation bag is placed on a lawn on the surface side of the weed control mat.