JPH1037199A - Greening work method for face of slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To establish a greening work method for a face of slope with which it is practicable to prevent the vegetation material sprayed to the slope from slipping off even in case the applicable slope has a mortar or concrete covered surface or a rockbed, supply of water to the vegetation material from the natural ground, and generate good rooting of the plant to the natural ground. SOLUTION: A number of holes 3 are formedin a slope 2 at a certain spacing, and a lattice frame 10 with mortar or concrete 9 swollen over is formed on the slope 2, and a weir 14 with a net member 13 is furnished in the lattice frame 10. A vegetation material 16 is sprayed to the inside of the frame 10 in such a condition as checked by the weir 14. If necessary, a netting 4 is set as stretching over the slope 2 before formation of the frame 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope revegetation method which is suitable for spraying mortar or concrete to which existing mortar / concrete is sprayed, or for slopes where plants such as bedrock are difficult to grow. It is about.

[0002]

2. Description of the Related Art A method of spraying mortar (or concrete) on a slope is a technique that has been practiced more than ten years ago for the purpose of preventing weathering and erosion of a slope made of soft rock or medium hard rock. .

[0003] However, when the mortar spraying surface was constructed more than 10 years ago, the mortar spraying surface became aging, causing hair cracks on the entire surface of the mortar spraying surface and partially peeling the surface. The situation has also been confirmed. Also, since the mortar spraying slope is prominent from a distance and the surrounding area is rich in natural vegetation,
There is no harmony with the surrounding landscape, giving a sense of discomfort.

[0004] For these reasons, various slope greening methods have been proposed in order to green the existing mortar spraying slope. One of them is a method of greening slopes using so-called thick soil to spray vegetation material obtained by mixing and mixing plant seeds with sandy soil, soil amendment, cement, fertilizer, etc., using a shotgun or the like. It has been known.

[0005]

However, in such a greening method, in addition to the poor adhesion of the vegetation material to the mortar spraying slope, invasion of the roots of the grown plants into the ground is required. It is impeded by the mortar spraying method, so that the vegetation material, which is the growth floor, and the ground are placed under marginal conditions, and furthermore, the supply of moisture from the ground to the vegetation material can be expected. There is a problem that the vegetation material is dried in a mat shape because it is not available, and it is easy to slide down due to pore water pressure such as rainfall.Because the roots of the plant can not enter the ground, lack of nutrients and moisture There has been a problem that plants are liable to grow poorly.

[0006] These problems are not limited to the mortar spraying slope, but can be easily understood even if the concrete spraying slope is used or the mortar spraying slope is replaced with rock. It is clear that this also occurs when the slope is rock.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a method of forming a grid frame on a slope by a mortar or concrete swelling body, and in addition to easily forming roots of plants. In order to make it possible to infiltrate the ground and to supply moisture to the vegetation material from the ground, it is necessary to prevent drying and slipping of the vegetation material, and to supply nutrients and water to the plants. It provides a greening method for the slope that has been made possible.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the slope greening method according to the present invention, a large number of holes opening in the slope are formed in the slope at appropriate intervals, while the mortar or concrete is inclined in the slope direction. A grid frame swelled at appropriate intervals in the contour direction, and a weir body in which a mesh member having a large number of holes is erected in the grid frame in the contour direction and almost perpendicular to the slope. And then spraying vegetation material into the grid frame.

In forming the lattice frame, a reinforcing bar is bridged at a position where the inside of the frame of the lattice frame is almost equally divided in the inclination direction of the slope, and the upper end side of the dam body is placed on the bridge bar. It is desirable to fix. Further, prior to forming the lattice frame, it is preferable that a net is stretched over the entire surface of the slope to be greened, and the lower end side of the dam is fixed to the net.

According to the revegetation method of such a slope, the sliding of the vegetation material is prevented by the lattice frame, and the flow movement of the vegetation material in the lattice frame is effectively prevented by the dam body. In addition, since the blocking body is formed of a net-like member, rainwater does not pool more than necessary at the upper portion of the blocking body.

That is, it is needless to say that the sliding of the vegetation material can be prevented by making the grid frame made of mortar or concrete small. However, this requires a high construction cost for the grid frame and also causes rainwater to be unnecessarily consumed. Will accumulate on the surface. In this regard, in the present invention, the barrier is formed by a net-like member without making the lattice frame smaller than necessary so as to be suitable in terms of cost and water retention.

[0012] Further, by forming a large number of holes that open on the slope, the moisture can be supplied to the vegetation material from the ground, and drying of the vegetation material is prevented. Furthermore, since the roots of the plants take root in the ground through the above holes,
Supplementation of nutrients and hydration of plants will be carried out favorably, and the vegetation material and the ground will be integrated to grow plants, so that the slope will be sprayed with mortar or concrete. Even if there is a slope, or even if it is a slope of a bedrock where plant growth is difficult, the slope is preferably greened.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A slope revegetation method according to an embodiment of the present invention for a sprayed slope 2 of a mortar 1 will be described below with reference to the drawings. As shown in FIGS. 1 and 2, first,
An existing mortar spraying slope 2 has a diameter of about 10 mm to 40 mm and a depth of 100 mm to
A large number of holes 3 of about 250 mm are formed, for example, at intervals of about 300 mm. Although the depth of the hole 3 is usually set to the above range since the thickness of the existing mortar spraying layer is 70 mm to 100 mm, for example, a part of the existing mortar spraying slope 2 is used. If it is found that the ground is relatively soft (many cracks and the like) by trial digging or the like, the hole depth is increased within the above range, or the ground is relatively hard ( If it is found that there are few cracks, etc.), the depth can be set to an appropriate value such as reducing the depth of the hole within the above range.

Next, for example, the mesh size is 50 mm × 50 mm.
A net 4 such as a rhombus wire mesh is stretched over the entire surface of the slope 2 to be greened, and the net 4 is fixed by anchor bolts 5 that penetrate the mortar spraying slope 2 and reach the ground. . The above holes 3 may be formed in parallel with the stretching of the mesh body 4 or may be formed after the stretching of the mesh body 4.

Next, as shown in FIG. 3, the mesh member 4 is provided at an interval of, for example, 1300 mm in the inclination direction of the slope 2 and at an interval of, for example, 950 mm in the contour direction.
Reinforcing bars 6 are arranged in a lattice shape on the upper side, and, for example, crossing portions of the reinforcing bars 6 are bound and fixed to main anchor bolts 7 that penetrate the mortar spraying slope 2 and reach the ground. Reinforcing bars 8 are also arranged in a grid pattern above the reinforcing bars 6 (for example, 100 mm on the slope 2), and the reinforcing bars 8 are also bound and fixed to the main anchor bolts 7.

Then, as shown in FIG. 4, these rebars 6 and 8 are embedded so as to have a radius of, for example, 175 m.
Mortar or concrete 9 is sprayed to form a lattice frame 10 so as to form a semicircular bulge of about m.
At this time, before the mortar or concrete 9 is sprayed, the reinforcing steel 11 is placed at a position where the inside of the lattice frame 10 is divided into approximately two equal parts in the inclination direction of the slope 2, for example, at an interval of 80 mm from the slope 2. (See FIG. 3).

In order to prevent the mesh 4 in the grid frame from being filled with the spray mortar or concrete 9, preferably, a curing sheet 12 is spread on a portion corresponding to the grid frame as necessary. The reinforcing bar 11 is fixed by bridging an anchor bolt which penetrates the mortar spraying slope 2 and reaches the ground, and binds or secures the anchor bolt with a height of 80 mm from the slope 2. Thus, the reinforcing bar 11 is bent in a bow shape, and the bent portion is bound and fixed to the upper reinforcing bar 8.

When the grid frame 10 is formed by mortar or concrete 9 in this way, as shown in FIG. 5, the curing sheet 12 spread as necessary is removed. Then, as shown in FIGS. 6 and 7, the mesh member 13 having a large number of holes and having a height of about 80 mm is erected in the lattice frame in the contour direction and almost perpendicular to the slope 2. As described above, the upper end side and the lower end side of the mesh member 13 are bridged and fixed to the reinforcing bar 11 and the mesh member 4, and the inside of the lattice frame 10 is divided into approximately two equal parts in the inclination direction of the slope 2. The dam body 14 is formed.

As the mesh member 13, for example, an expanded metal, a perforated punched metal, a plain woven wire mesh, a crimped wire mesh, and the like can be appropriately selected. In this embodiment, a crimped wire mesh having a mesh size of about 20 mm × 40 mm is used. And the mesh member 13
As shown in FIG. 10, two blocking members 14 are formed so as to divide the inside of the lattice frame into approximately three equal parts in the inclination direction of the slope 2. In the case where the interval in the slope direction of the grid frame 10 is widened, a plurality of blocking bodies 14 may be formed so as to divide the inside of the grid frame more equally.

In forming the dam body 14, the long net-like member 1 is made to cross the left and right frame portions of the lattice frame 10 before spraying the mortar or concrete 9 described above.
Alternatively, the mortar or concrete 9 may be sprayed so as to embed a mesh portion crossing the frame portion of the mesh member 13 by stretching the mesh member 3. That is, the dam body 14 may be formed before or after the formation of the lattice frame 10 made of the mortar or concrete 9.

In addition, if necessary, in the vicinity of the mesh member 13,
An anchor bolt 15 that penetrates the mortar spraying slope 2 and reaches the ground may be provided, and the mesh member 13 may be bound and fixed to the bolt 15 to prevent the mesh member 13 from falling down.
Alternatively, if the anchor bolt 15 for preventing falling is provided, the above-described bridging reinforcing bar 11 may be omitted.

Thus, after forming the grid frame 10 made of mortar or concrete 9 and the dam body 14 made of the mesh member 13, the grid is embedded so as to embed the dam body 14 by a wet spraying method or a dry spraying method. The vegetation material 16 is sprayed into the frame 10 at a thickness of, for example, 100 mm (see FIG. 8).

As the vegetation material 16, a material obtained by adding plant seeds to a vegetation base material such as a fertilizer, a growth base material, a water retention material, and a glue material is selected. Specifically, in this example,
Vegetation material per 1 m ³ of blowing in 100mm thickness 1
No. 6 of tall fescue, all of which are plant seeds
0g, creeping 40g and Bermuda 30g
In addition to 10 g of mugwort, 160 g of medhagi, 50 g of yamahagi and 200 g of weasel, soil factor S, which is a base material for plant seed growth and vegetation (Nippon Vegetation Co., Ltd. It is a product name of 770 liters of fertilizer, water retention material, soil improvement material, glue material for preventing runoff, etc.) and 1230 liters of peat moss, which are used locally. It is to be noted that this is merely an example and is not limited to the above material ratio.

When the vegetation material 16 is sprayed by a wet spraying method, the vegetation material 16 containing plant seeds and water are kneaded in a mixer, for example, and the mixture is discharged from a nozzle of a mortar spraying machine by an air pressure. It is sprayed into the frame 10.

When the vegetation material 16 is sprayed by the dry spraying method, for example, the applicant of the present invention uses the method of June 1, 1991.
A “method of spraying a sprayed base material in a greening method” (Japanese Patent Application No. 3-157568), which was filed as a patent application on a date, can be employed. That is, a mixture of a plant seed and a vegetation base material is used as a spray base material by a spraying device disclosed in the prior application, and the blown material is supplied to a spray nozzle by a blower. Then, water is introduced into the grid frame 10, and the spray substrate and water are used as a vegetation material.

According to the above-described slope greening method, the vegetation material 16 sprayed into the lattice frame 10 is held by the lattice frame 10 made of mortar or concrete 9, so that the vegetation material 16 is effectively slid down. Is prevented. In addition, since there is a blocking body 14 in the grid frame 10 that partitions the inside of the grid frame 10 almost evenly in the inclination direction of the slope 2, the number of the blocking bodies 14 is large. The flow of the vegetation material 16 in the lattice frame 10 is effectively prevented without accumulating extra rainwater in the upper portion of the dam body 14 because the mesh member 13 has the holes.

Further, since a large number of holes 3 opened in the slope 2 are formed in the slope 2, water can be supplied from the ground to the vegetation material 16 through the holes 3, and therefore, the vegetation material 16 is dried. Is prevented. Furthermore, as shown in FIG. 9, it is possible for the roots of the plants to enter the ground and to be laid, so that the plants contained in the vegetation material 16 sprayed on the slope 2 can be provided. Means that, in addition to the nutrient supply from the vegetation material 16, nutrient supply and water supply from the ground are performed.
Since the plant grows together with the ground 6, the greening of the slope 2 is suitably performed even if the slope 2 is a mortar sprayed slope.

If a gap is found between the mortar spraying slope 2 and the ground when the hole 3 is formed in the slope 2, the soil is appropriately injected so as to fill the gap. And other countermeasures. Needless to say, the slope greening method according to the present invention can be widely applied to concrete 8 spraying slopes other than mortar spraying slope 2 and slopes where plant growth is difficult, such as bedrock.

Further, in the embodiment, the mesh 4 is stretched on the mortar spraying slope 2; however, the provision of the mesh 4 is not an essential condition. Therefore, when the net 4 is not provided, the net member 13 for forming the dam 14
It is sufficient to take measures such as fixing the lower end side of the base to the anchor bolt 15. Further, mortar or concrete 9 is sprayed so as to embed the reinforcing bars 6 and 8 to form the lattice frame 10, but a wire mesh form is arranged on both sides of the bulging body so as to surround the bulging body forming area. Then, a grid frame 10 is formed by means of a spraying method frame in which mortar or concrete 9 is sprayed into the wire mesh frame, and a dam body 14 is formed in the frame.
May be taken.

[0030]

As described above, according to the slope revegetation method according to the present invention, slipping of the vegetation material sprayed on the slope is surely prevented, and at the same time, the vegetation material from the ground is removed from the ground. The hydration ensures that the vegetation material is prevented from drying.

Further, the roots of the plants are rooted on the ground, the vegetation material is integrated with the ground, and moisture and nutrients are supplied to the plants from the ground, so that the plants can be surely grown. Even if it is a mortar or concrete sprayed slope or a slope where plant growth is difficult such as a bedrock, this slope can be beautifully finished in appearance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the construction status of slope greening.

FIG. 2 is a cross-sectional view showing a state in which holes are formed and a net is stretched.

FIG. 3 is a cross-sectional view showing a reinforcing bar arrangement state of a reinforcing bar for forming a lattice frame.

FIG. 4 is a cross-sectional view showing a state in which a lattice frame is made of mortar or concrete.

FIG. 5 is an explanatory view of removing a curing sheet.

FIG. 6 is a cross-sectional view showing a state in which a dam body is formed in the lattice frame.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

FIG. 8 is a sectional view showing a sprayed state of a vegetation material.

FIG. 9 is an explanatory diagram showing a growth state of a plant seed.

FIG. 10 is a cross-sectional view of another embodiment in which two dams are formed in a lattice frame.

[Explanation of symbols]

2 ... Slope, 3 ... Hole, 4 ... Reticulated body, 9 ... Mortar or concrete, 10 ... Lattice frame, 11 ... Reinforcing bar, 13 ...
Reticulated member, 14: dam, 16: vegetation material.

Claims (3)

[Claims] 1. A method in which a large number of holes opening on a slope are formed on the slope at appropriate intervals, while mortar or concrete is bulged at appropriate intervals in the slope direction and contour direction of the slope. Forming a grid frame and a dam body in which a mesh member having a large number of holes is erected in the grid frame in the contour direction and substantially perpendicular to the slope, and thereafter, vegetation is formed in the grid frame. A greening method for slopes characterized by spraying materials. 2. When forming the lattice frame, a reinforcing bar is bridged at a position where the inside of the frame of the lattice frame is almost evenly divided in the inclination direction of the slope, and the upper end of the dam body is placed on the bridge bar. The method according to claim 1, wherein the side is fixed. 3. The method according to claim 1, further comprising, prior to forming the lattice frame, extending a net over the entire surface of the slope to be greened, and fixing a lower end of the dam to the net. 2. The method of greening the slope described in 2.