JPH0757955B2 - Revegetation method on embankment with reinforced structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a greening method for an embankment having a reinforced structure, and particularly to a nearly vertical slope of, for example, 2 to 3 minutes. It is related to the greening method.

[Prior Art] There are various construction methods for embankments, but a soil retaining wall is provided along the slope to prevent it from collapsing when the slope becomes steep. As the earth retaining wall, there are a gravity type, an inverted T type, a retaining wall type, etc., but all of them required a large-scale foundation, and required a lot of labor and materials.

In order to reduce the labor and materials required for the above foundation work,
The applicant of the present invention has proposed a method of constructing an embankment board having a reinforcing structure as shown in FIG. In the figure, a plurality of stubs (2) (2) ... Are embedded in the embankment board (1) at intervals above and below. The retainer (2) is composed of an anchor rod (3) and anchor plates (4) (4) which are orthogonal to the anchor rod (3), and one end (3a) of the anchor rod (3) is a slope (5) of the embankment plate (1). ) From the outside. The slope (5) is covered with a sheet (6), the lower part (6a) of the sheet (6) is arranged between the ground (G) and the embankment (1), and the upper part (6b). ) Is buried in the embankment board (1) near the top of the embankment board (1). One end portion (3a) of the anchor rod (3) projects into the intermediate portion (6c) of the seat (6), and a horizontally extending pipe member (7) is passed through the one end portion (3a) to tighten the nut. It is connected. Further, a wall body (8) is formed along the sheet (6).

In addition, the greening method on the embankment is selected based on the difference in the geology and the slope of the slope, and the seed spraying method, the soil spraying method, the thick base material spraying method, etc. are known.

[Problems to be Solved by the Invention] In the above-mentioned conventional greening method, the slope of the slope of the embankment is limited, and generally the maximum value of the slope is about 60 degrees. Therefore, on the steep slope as shown in FIG. 7, there is no stable greening method with a high risk of collapse.

Therefore, a technical problem that should be solved in order to green the steep slope in the embankment having a reinforcing structure arises, and the present invention aims to solve this problem.

[Means for Solving the Problem] The present invention has been proposed in order to achieve the above-mentioned object, and a plurality of sills are embedded in the embankment at intervals in the upper and lower sides to form a slope of the embankment. In the embankment board having a reinforcing structure formed by connecting the intermediate portion of the sheet to one end of the retainer, and lath wire mesh is stretched on the surface of the sheet, and the surface of the lath wire mesh is In the embankment board having a reinforced structure, a continuous soil fiber-mixed soil is sprayed to form a soil layer covering the gap between the lath wire net and the sheet or the surface of the lath wire net. The present invention is intended to provide a greening method for a landfill and a greening method for an embankment board having a reinforcing structure in which pacers are provided at appropriate intervals between a lath wire net and a sheet.

[Operation] In the present invention, the lath wire net is stretched on the surface of the sheet covering the slope, and the soil containing the continuous long fibers is sprayed. The sprayed soil enters the gap between the lath wire net and the sheet and also adheres to the surface of the lath wire net, and is mixed with the soil in a state where continuous long fibers are entangled in the space and lath wire net. . Therefore, even if the slope is steep, it is possible to form a soil layer having a very large binding force, and greening is possible even on a substantially vertical slope.

Further, by providing the spacer between the lath wire net and the sheet, the lath wire net does not adhere to the sheet, and a predetermined gap can be secured.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 5 of the attached drawings. For the sake of explanation, technical matters that are publicly known in the related art will be described at the same time, and the same reference numerals will be used for the configurations corresponding to the conventional examples. In FIG. 1, the embankment board (1) has a plurality of copies (2) spaced apart from each other vertically.
(2) ... are buried, the slope (5) of the embankment (1) is covered with a sheet (6), and the intermediate portion (6c) of the sheet (6) constitutes a reserve (2). It is connected to one end (3a) of the anchor rod (3). This embankment board (1) is constructed by the conventional method shown in FIG.
A lath wire mesh (10) is stretched on the surface of the sheet (6) and is connected to one end (3a) of the anchor rod. A soil layer (11) is provided in the gap between the lath wire mesh (10) and the sheet (6).

FIG. 2 is an enlarged view of the connecting portion, the anchor rod (3).
A female screw portion is engraved at one end portion (3a) of the sheet, and a tube member (7) extending in the horizontal direction penetrates the one end portion (3a) to press the intermediate portion (6c) of the seat, and the outside thereof. A lath wire mesh (10) is stretched over and tightened with a nut (12). The lath wire mesh (1
A washer (13) having a U-shape in side view is interposed between the nut (0) and the nut (12), and a binding wire (14) inserted through the space (13a) of the washer (13) is connected to the lath wire mesh (10). The lath wire gauze (10) is reinforced by fixing it to the. Sheet (6)
The soil layer (11) provided in the gap between the lath wire mesh (10) and the surface portion is formed by the following method.

Fig. 3 shows a spraying device for continuous soil mixed with continuous fiber. The transporting device (16) for the soil is loaded on the platform of the truck (15) equipped with a crane, and the tip of the boom (17) of the crane is loaded. An injection device (18) accommodating a bobbin containing continuous long fibers is attached to the section. Water is added to seed soil and fertilizer-blended seeds, and the mixture is stirred and kneaded in a tank (19), and the slurry-like soil and aggregates are pressure-fed to the injection device (18). The jetting device (18) is provided with a jetting nozzle (20), and the sent-in soil and the aggregate are mixed and jetted. At that time, the continuous filaments of the bobbin are drawn into the injection nozzle (20), mixed into the soil and injected. When the continuous long fiber-mixed soil is sprayed onto the lath wire mesh (10) of the embankment (1) by the spraying device thus formed, the boom (17) of the crane is expanded / contracted and jetted. The device (18) is made to match the spraying height, and the spray nozzle (20) is swung vertically and horizontally so as to spray the soil with an appropriate spray angle. Therefore,
The sprayed soil enters inside the lath wire mesh (10),
The continuous long fibers are entwined with the soil and the lath wire net (10) and mixed, and further cover the surface of the lath wire net (10) to form an extremely strong binding soil layer (11). It

Here, spacers (21) (21) ... May be provided at appropriate intervals between the lath wire mesh (10) and the sheet (6). As shown in FIG. 4, the spacer (21) is composed of a base (22) (22) formed by bending a metal piece and a standing portion (23), and a notch (24) is formed in the standing portion (23). ) Is provided to lock the lath wire mesh (10). Therefore, the lath wire mesh (10) does not adhere to the sheet (6), and the thickness of the soil layer (11) can be secured with a predetermined gap. Further, as shown in FIG. 5, a tubular spacer (25c) is welded to the upper end portion (25b) of the bent reinforcing bar (25a), and the L-shaped reinforcing bar (25d) can be freely inserted into the spacer (25c). The spacer (25) with the anchor may be formed. In FIG. 2, the spacer (25) with the anchor is used. After the pipe member (7) is fastened with nuts and the lath wire net (10) is stretched, the mesh of the lath wire net (10) is used. Then, the bent rebar (25a) is placed. After that, the spacer (25c) of the bent rebar (25a) is connected to the L-shaped rebar (25
If you insert d) and insert it into the inner surface of the lath wire mesh (10),
The lath wire mesh (10) does not adhere to the sheet (6) and a predetermined gap can be secured. Furthermore, anchors (26) (26) ... Are placed in places from the surface of the lath wire mesh (10).

Thus, the lath wire mesh (10), the sheet (6), and the embankment board (1) can be integrated, and the sheet (6) can be used when spraying the soil.
Will not vibrate, and the adhesion to the soil will be good. From the results of various experiments, regarding the fixation of the lath wire mesh (10) and the sheet (6), the spacer (25) with anchor and the anchor (25) had a total length of about 500 mm, and the slope (1) of the embankment (1) 5) It was effective to drive about 26 anchors per 1 m ² .

On the other hand, if the sheet (6) is explained, the material of the sheet (6) should not be particularly limited, but from the experimental results of solar irradiation, polyester is the most durable,
Next, polyethylene, nylon and the like can be mentioned. The black color is more durable than the white color, and the sheet (6)
The holes of the plants vegetated in the soil layer (11) can be expanded by using a pit to open a large number of holes on the surface of the plant, or by using a woven fabric with a large number of holes. It is formed to promote.

Further, FIG. 6 shows a rectangular plate piece (2
7) is used, and a bag-like sheet (28) extending in the lateral direction is fixed to the intermediate portion (6c) of the sheet. Even in this structure, if continuous continuous fiber-containing material is sprayed as in the case of the embodiment shown in FIG. 2, the lath wire net (10)
A soil layer (11) is formed in the gap between the sheet (6) and the surface of the lath wire mesh (10).

Thus, since one embodiment of the present invention relates to the above configuration, even if the slope (5) of the embankment board (1) has a steep slope, the continuous long fiber-mixed soil is sprayed onto the customer. A soil layer (11) can be formed, and plants can be vegetated for greening.
Further, since the embankment (1) is firmly supported by the restraint (2) and the sheet (6), there is no restriction on the soil quality of the embankment (1), and viscous soil with small particles can be used. Therefore, since the specific surface area of the particles is large and the water retaining effect is good, and since the cohesive soil has a charge of, many nutrients such as fertilizers are ions, so that the fertilizing power becomes extremely high. Also, if ivy is planted on the lower part of the slope (5) of the embankment board (1), the ivy will form lath wire mesh (10) and soil layer (11).
It grows along the ground and grows roots in the soil layer (11) for greening.

Further, when there is rainfall on the top of the embankment (1), rainwater permeates the soil layer (11) through the sheet (6) because the sheet (6) has water permeability. Further, since the embankment (1) itself has water retention property, an effective greening base can be obtained unlike the case where the soil is sprayed on the bedrock.

Incidentally, the present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[Effects of the Invention] As described in detail in the above-mentioned one embodiment of the present invention, a lath wire mesh is stretched on the surface of a sheet, and a continuous soil mixed with continuous fibers is sprayed to form a soil layer. The sprayed soil enters the gap between the lath wire net and the sheet, and the continuous long fibers are entangled in the gap and the lath wire net to form a highly soilable soil layer. Therefore, even if the slope is steep and almost vertical, the greening on the slope is possible and there is no risk of collapse.

Further, when the spacer is provided between the lath wire net and the sheet, the lath wire net does not adhere to the sheet, and the thickness of the soil layer can be secured with a predetermined interval. In addition, since the sheet does not vibrate when the soil is sprayed, the soil adherence is good.

[Brief description of drawings]

1 to 5 show one embodiment of the present invention. FIG. 1 is a longitudinal sectional view showing a state in which a soil layer is formed on an embankment plate having a reinforcing structure, and FIG. 2 is a sheet. FIG. 3 is a side view of the spraying device, FIG. 4 is a perspective view of the spacer, FIG. 5 is a front view of the spacer with an anchor, and FIG. 6 is a second view. It is a principal part enlarged view which is a modification of a figure. FIG. 7 shows a conventional example and is a vertical cross-sectional view of an embankment board having a reinforcing structure. (1) …… Milled ground board, (2) …… Reserve (3a) …… One end of anchor rod (5) …… Slope, (6) …… Seat (6c) …… Seat middle part (10)… … Russ wire mesh, (11) …… Customer soil layer (21) (25) …… Spacer

Claims (2)

[Claims] 1. Formed by embedding a plurality of sills in the embankment at a distance from each other, covering the slope of the embankment with a sheet, and connecting the middle part of the sheet to one end of the sill. In the embankment board having a reinforced structure, a lath wire net is stretched on the surface of the sheet, and continuous long fiber-containing mixed soil is sprayed on the surface of the lath wire net to form a gap or lath between the lath wire net and the sheet. A greening method for embankment with a reinforcing structure characterized by forming a soil layer covering the surface of the wire mesh. 2. A greening method for a land embankment having a reinforcing structure according to claim 1, wherein spacers are provided between the lath wire mesh and the sheet at appropriate intervals.