JPH1077633A - Greening method for cut slope face - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a greening work method capable of shortening construction period and reducing man-hours and protecting a cut slope face and executing greening work definitely. SOLUTION: This greening work method forms a cut slope face 41 by excavating a natural ground 40 and plants a grass 31 and a tree 32 in the cut slope face 41, thereby greening the cut slope face 41. A sheet-shaped greening device 1 provided with the grass 31 or the tree 32 so as to protect and green the cut slope face 41 is mounted on the cut slope face 41. Mud 46 is injected and filled up in a cavity 45 between the greening device 1 and the cut slope face 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revegetation method for a cut slope, and more particularly, to an open tunnel, a tunnel wellhead,
The present invention relates to a greening method for a civil engineering work slope such as underpeening and a construction slope such as root cutting.

[0002]

2. Description of the Related Art Construction methods for cut slopes are based on geology, weathering degree,
Although it depends on conditions such as the construction period, generally the ground is first excavated to a predetermined height to form a slope, then a wire mesh is attached to this slope, and mortar is further sprayed to apply lining. Form. Next, a plurality of holes are made in the ground from above the lining, and a reinforcing bar-shaped member is inserted, and the periphery of the bar-shaped member is reinforced with grout or the like. By repeating such a process, the cutting work was advanced from above the ground to below.

[0003] After the cut slope is formed, plants or trees are planted by a greening method. Conventionally, when planting herbs, relatively thin layers such as a seed spraying method in which seeds are mixed with fertilizer and water and sprayed on the lining, or a customer soil spraying method in which soil is added and sprayed. Was the mainstream. Also, soil, seeds, fertilizer,
A method of spraying a thick layer base material in which a material in which water, additives, and the like are mixed is sprayed on the lining with air has also been performed.

On the other hand, when planting a woody plant, the thickness of the layer necessary for root survival increases, so that the above-mentioned thick-layer base material spraying method or a method of spraying fiber-mixed earth and sand as a base is used. In the past, the seed spraying method and the soil spraying method were used.

[0005]

However, in the conventional cutting slope revegetation method, after the cut slope is stabilized with a reinforcing material such as wire mesh, mortar spraying and grout, planting of a herb or a tree is performed. Therefore, there is a problem that the number of steps increases and the construction period becomes longer. In addition, when planting a herb or the like, there is another problem that the number of man-hours is further increased because a scaffold must be provided on the slope again.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and it is possible to shorten the construction period and reduce the number of man-hours, and furthermore, it is possible to surely protect the cut slope and greenery. An object of the present invention is to provide a greening method for soil slopes.

[0007]

SUMMARY OF THE INVENTION The present invention is a greening method for a cut slope, and is constituted as follows in order to solve the above-mentioned technical problem. That is, the present invention relates to a greening method in which a ground slope is excavated to form a cut slope, and planting a herb or a tree on the cut slope to green the slope. A plate-shaped greening device for protecting and greening the surface is attached to the cut slope, and mud is injected into a cavity between the greening device and the cut slope. The mud may include locally generated soil generated by excavation of the cut slope, and an additive capable of setting a predetermined strength and a predetermined hardening time.

[0008] The revegetation method of the cut slope according to the present invention comprises fixing a revegetation device to the cut slope and injecting mud into a cavity between the revegetation device and the cut slope. Since it is not necessary to finish the soil slope flat, the construction is simplified, and the greening device and the cut slope are completely adhered to each other, so that the cut slope can be reliably protected and greened.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a cut slope revegetation method according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a view for explaining a greening method for a cut slope according to the present invention. In the greening method of the cut slope, first, the ground 40 is excavated to form the cut slope 41. The bar-shaped members 42 are inserted into the cut slope 41 at a predetermined pitch for reinforcement. In addition, flat greening devices 1 to be described later are laid on the cut slope 41 side by side with almost no gap,
This greening device 1 is attached and fixed to the rod-shaped member 42.

In this case, the cut slope 41 is divided into a plurality of steps vertically, and the formation of the cut slope and the laying and fixing of the greening apparatus 1 are repeated from the upper step to finally obtain the overall cut slope. The formation of the surface 41 and the laying and fixing of the planting apparatus 1 can be completed.

After laying and fixing a predetermined number of greening devices 1 on the entire cut slope 41 in this manner, the mud 46 is injected into the cavity 45 between the greening device 1 and the cut slope 41. Fill. Although the size and shape of the cavity 45 differ depending on the nature of the ground 40 and the method of excavating the cut slope 41,
It occurs irregularly when the cut slope 41 is excavated.

On the other hand, the greening device 1 is laid for protection and greening of the cut slope 41. If the cavity 45 between the greening device 1 and the cut slope 41 is left as it is, The protection of the cut slope 41 becomes uncertain, and the roots of the herbs 31 and the trees 32 provided in the greening apparatus 1 may not survive. Therefore, the mud 46 is injected and filled into the cavity 45.

The mud 46 must have the property of being able to completely fill the cavity 45 having an irregular size, shape and distribution, and must be capable of meeting required qualities such as good workability and economy. Therefore, since the mixing ratio of soil and water differs depending on the properties of the soil generated at each site, it is preferable to use the test after controlling the properties by performing test kneading. The concrete characteristics of the mud are as follows: breathing rate 1% or less, slump flow 60cm or more, P float flow 1
It is desirable to satisfy an evaluation criterion such as 5 seconds or less.

In the case of injecting the mud 46 having such properties, firstly, water is allowed to pass through the outer periphery of the greening apparatus 1 fixed to the cut slope 41, for example, a rag, but a leak preventer that does not allow soil particles to pass. Means (not shown) are applied. Next, a locally generated soil 47, such as, for example, kuroboku, loam, or silt generated when the cut slope 41 is excavated, is sifted through a sieve 48 to a predetermined size such as a boulder or a plant root in the locally generated soil 47. The solid obstacle 49 described above is removed. The soil particles 50 generated in this manner are transferred to, for example, the belt conveyor 5.
At 1, it is supplied to the stirring tank 52.

On the other hand, the stirring tank 52 is provided with water 54 in a water tank 53.
And an additive 60 that can set a predetermined hardness, that is, a hardness at which the roots of the herb 31 and the wood 32 can enter, and a predetermined hardening time, for example, a hardening time of 1 to 2 to 3 days. Supplied. The additive 60 has a curing time of 1 to 2 to 3 days as described above, and has a strength enough to allow roots of the herb 31 and the tree 32 to enter (generally, ku = 1 to 2 k).
g / cm ² ). In consideration of convenience of handling, influence on plants, economic efficiency, and the like, a high molecular organic agent is inappropriate, and inorganic materials such as gypsum, cement, and lime are preferable. The mixing ratio of the additive 60 also needs to be controlled by test mixing as in the case of the mud characteristic control.

The soil particles 50, the additives 60 and the water 54 supplied to the stirring tank 52 are mixed with a stirring screw 55 in the stirring tank 52.
To generate mud 46. This mud 46
Through a gap 59 of an appropriate size provided between the upper edge of all the greening devices 1 at the uppermost stage and the cut slope 41 via the mud pump 57 and the pipe 58, all the greening devices 1 The cavity 45 is injected and filled. The greening device 1
A suitable pipe (not shown) leading to the cavity 45 in the middle of
It is also possible to inject the mud 46 into the cavity 45 using this.

The mud 46 filled in the cavity 45 leaks its moisture through the waste around the greening device 1.
The soil particles 50 and the additive 60 remain in the cavity 45 without leaking. The cut slope 41 and the greening device 1 are completely adhered to each other by the residual components, the cut slope 41 is pressed and protected by the greening device 1, and the herb 31 and the wood 32 of the greening device 1 are protected. The roots surely take root on the cut slope 41, and the cut slope 41 is greened.

The greening apparatus 1 used in this greening method is for holding and protecting the cut slope 41 and greening as described above. For example, as shown in FIG. A rectangular frame member 11 and a mesh member 12 attached to the bottom surface of the frame member 11 are provided. The frame member 11 is filled with a plant base 30 containing soil, fertilizer, and the like, and a herb 31 and a tree 32 are planted on the plant base 30. The roots of the herb 31 and the wood 32 are the mesh member 1
2, the herb 31 and the wood 32 are held.

The frame member 11 is made of, for example, L as shown in FIG.
A rectangular outer frame 14 formed of a shape steel is provided.
Reinforcement plate members 15, 15 are attached in a V-shape at the center of. The outer frame 14 is configured such that one side of the L-shaped steel is located on the bottom side and serves as an inner flange portion, and the other side is located on the outside and serves as a peripheral wall. The outer frame 14 is formed so as to have a predetermined strength, and is further subjected to rust prevention processing.
As the material of the outer frame 14, besides this, stainless steel or resin can be used.

The above-mentioned mesh member 12 is disposed over the entire bottom side of the outer frame 14, and the periphery of the mesh member 12 is fixed to one side of the L-shaped steel, for example, a screw 16, that is, the flange portion of the outer frame 14. Have been. A mounting plate 17 of an appropriate size is provided at the center of the left and right edges and the lower edge of the outer frame 14, and the mounting plate 17 is provided with a round hole 18. When the greening apparatus 1 is fixed to the cut slope 41, a rod-shaped member 42 inserted into the cut slope 41 as shown in FIG.
In this case, the round hole 18 of the mounting plate 17 may be fitted into the rod member 42, and the nut 43 may be fastened to the rod-shaped member 42 from above the mounting plate 17.

As described above, according to the cutting slope revegetation method, the plate-shaped revegetation apparatus 1 (FIG. 2) is laid on the cut slope 41 (FIG. 1) over the entire surface, and the rod-shaped member 42 is formed. Since only the mud 46 is injected into the cavity 45 between the greening device 1 and the cut slope 41, a wire mesh is attached to the cut slope to form a concrete lining, as in the prior art. Compared with the case of greening on top of that, it is possible to reduce the man-hours and the construction period, and because the greening apparatus 1 and the cut slope 41 are in close contact with each other via the soil particles 50 of the mud 46 and the additive 60, the cutting is performed. The protection and greening of the soil slope 41 can be reliably performed. Also,
Since the mud 46 can be generated only with the locally generated soil 47, the water 54 and the additive 60 such as inexpensive industrial gypsum or lime,
Easy to obtain and economical.

In the embodiment described above, the mud pump 5
7, the case where the mud 46 is injected at once into the cavity 45 between all the greening devices 1 and the cut slope 41 has been described. For example, one to several greening devices 1 are laid and When the mud 46 is injected every time it is fixed,
If the amount of used is small, for example, a bucket (not shown)
By mixing and stirring the soil particles 50, the additive 60, and the water 54 into the like, mud 46 is generated, and the mud 46 can be directly injected into the cavity 45 from a bucket. In this case,
Equipment for generating the mud 46 is not required.

[0024]

As described above, according to the cutting slope revegetation method of the present invention, the flat revegetation device is fixed to the cut slope, and the space between the revegetation device and the cut slope is removed. Since only mud is injected into the cavities, it is possible to significantly reduce the number of steps and the construction period as compared with the related art, and also to surely protect and green the cut slope. Further, since mud is easily available and can be produced using only inexpensive materials, it is economically excellent.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a greening method for a cut slope according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Greening apparatus 31 Herbaceous plant 32 Kimoto 40 Ground mountain 41 Cut slope 45 Hollow 46 Mud 47 Locally generated soil 60 Additive

Claims (2)

[Claims] 1. A greening method in which a ground slope is excavated to form a cut slope, and a herb or a tree is planted on the cut slope to revegetate the slope. Attach a plate-shaped revegetation device provided with the herb or the wood to protect and revegetate on the cut slope, and inject and fill mud into the cavity between the revegetation device and the cut slope. A greening method for cut slopes, characterized by the following: 2. The method according to claim 1, wherein the mud includes locally generated soil generated by excavation of the cut slope and an additive capable of setting a predetermined strength and a predetermined hardening time. 2. The greening method for a cut slope described in 1.