JPH10317382A - Slope greening method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a greening slope having no dropping of soil dressing, excellent durability, and good growth of plants by fixing a spiral earth retaining mat member to the slope with anchor members, and spraying the soil kneaded with plant seeds, fertilizer, and an erosion preventing agent to a rolled soil dressing face to form a plant growing layer. SOLUTION: Spiral members are arranged in parallel on the slope 9 of teppeiseki stone blocks 10 forming a concrete block revetment to form a soil retaining mat member 11, and the soil retaining mat member 11 is fixed to the slope 9 by anchor members 12. The soil containing at least one of waste soil and sludge and kneaded with a consolidating agent is dressed until the soil retaining mat member 11 is covered, and shaping and rolling is applied by the back face of a backhoe to form a soil dressing layer 13. The soil kneaded with plant seeds, fertilizer, and an erosion preventing agent is sprayed to the soil dressing layer 13 face to form a plant growing layer 14. Soil grains are loosely connected, and the soil dressing layer 13 can be formed while the soil is kept neutral.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope greening method for greening slopes such as existing concrete block seawalls and bedrock.

[0002]

2. Description of the Related Art In recent years, greening works for growing plants on slopes have been carried out in various places in order to improve the scenery of existing concrete block seawalls and rocks. When greening concrete block revetments, etc., it is necessary to form a soil layer for plant growth on the slope, but since the slope is hard, measures are taken to prevent the soil layer from sliding down even after a long period of time. Need to be taken.

For this reason, various types of slope greening methods have been developed. Conventional slope greening methods include, for example, a method of filling the soil with notches or recesses on the slope, a method of spraying asphalt emulsion after applying a mixture of soil and cement on the slope, There is a construction method of laying a net-like flat body or a frame body on a slope to prevent slipping.

However, in the case of the method of filling the soil by providing a notch or a recess on the slope, it is difficult to implement the method because a very large amount of labor is required for the construction work. Also, in the case of the method of spraying asphalt emulsion after applying a mixture of soil and cement on the slope, rainwater infiltrates between the soil and cement mixed layer and the slope, causing the soil and cement layer to separate and collapse. Cheap. In addition, the soil becomes alkaline due to the action of cement, and the growth of plants is hindered because the soil becomes too hard.

[0005] Therefore, recently, a construction method has been adopted in which a net-like flat body, a net-like mat body or a frame body having a certain thickness is laid on the slope to prevent slippage of the soil.

[0006]

In the case of the method of laying a net-like flat body on a slope, it is necessary to cover the slope with a net-like flat body after holding the soil on the slope and hold it. ,
The construction work is very complicated. In addition, since the net-like flat body is held at a position away from the slope to prevent the soil from sliding down, there is nothing holding the soil at the boundary between the slope and the soil layer. When the surface has irregularities, rainwater permeates the soil layer during rainfall and collects in the depressions, and the soil is easily scoured.

Further, after a lapse of time after the completion of the construction, the net-shaped flat body tends to gradually move in the direction of gravity, and finally comes into close contact with the slope, so that the effect is significantly reduced. Can't prevent slippage of land.

[0008] As described above, the net-like flat body used in the conventional method has a limited ability to fix the soil, so that a greening slope suitable for plant growth cannot be maintained for a long time. .

Therefore, a method has been developed in which a net-like mat body having a certain thickness is laid on the slope and the soil is laid on the net-like mat body. If the surface has irregularities, it cannot be laid so as to be in close contact with the irregular surface. For this reason, a gap is generated between the net-like mat body and the slope concave portion, and when rainfall occurs, rainwater permeates the soil layer and collects in the slope concave portion, and the soil soil is easily scoured.

In the case of a construction method in which a frame is laid on a slope to prevent the soil from sliding down, there is no fixing of the soil to the slope in one section of the frame. The adhesion between the soil and the soil layer is insufficient, and the soil is likely to slide down after construction.

As described above, in the conventional slope revegetation method, since the adhesion between the soil layer and the slope is insufficient, the soil is slid down, scoured by permeated rainwater, and In fact, the intended purpose of greening the slope has not been achieved because the soil has been transformed into a state unsuitable for plant growth.

On the other hand, a large amount of waste excavation, sludge, etc. are generated with the execution of river construction and river management. However, since there are few places where these waste excavation, sludge, etc. can be disposed, a great deal of labor is required for the treatment. Spending. For this reason, there are demands for means and uses that can effectively utilize these waste excavated materials, sludge, and the like.

The first problem to be solved by the present invention is to provide a slope revegetation method that can form a revegetation slope that does not slide down on the soil and is excellent in durability and that can grow plants well. Is to provide. A second problem to be solved by the present invention is to provide a slope greening method capable of effectively utilizing waste excavation, sludge, and the like.

[0014]

In order to solve the above-mentioned problems, a slope greening method according to the present invention comprises laying a soil retaining mat member formed by arranging spiral members in parallel on the slope, and providing the soil retaining mat member. After fixing the soil to the slope with the anchor member and performing the soil until the retaining mat member is covered,
Furthermore, the present invention is characterized in that a soil in which a plant seed, a fertilizer, and an erosion inhibitor are kneaded is sprayed on a surface of a guest soil to form a plant growth layer.

In the slope revegetation method of the present invention, a retaining mat member is laid on a slope such as a revetment of an existing concrete block and fixed to the slope with an anchor member. After the soil is covered until the retaining mat member is covered, compaction is performed. In addition, since the retaining mat member is formed by arranging spiral members in parallel, even if the slope has irregularities, it can be deformed along the slope and securely fixed to the slope.

The retaining mat member is formed of a helical member and has a predetermined thickness.
By performing the soil removal until the soil retaining mat member is covered, the soil soil layer near the slope is integrated with the soil retaining mat member, and is securely fixed to the slope. After fixing the retaining mat member to the slope, the greening slope can be formed by laying the soil, so that the construction work is also easy.

Furthermore, the retaining mat member does not move in the direction of the slope unlike the conventional net-shaped flat body even after the completion of the construction, even after a lapse of time. Can be maintained for a long time.

Next, by spraying the soil kneaded with plant seeds, fertilizer, and erosion inhibitor onto the soil layer,
Form a plant growth layer. Since the plant growth layer contains plant seeds and fertilizer, the plants grow after a lapse of a predetermined period after the completion of the construction, and a greening slope with excellent aesthetic appearance is formed. Further, since the plant growth layer contains an erosion inhibitor, it is not eroded by rainwater or the like, and the soil does not slide down.

Further, the slope greening method according to the present invention is characterized in that the guest soil is obtained by kneading a binder containing at least one of waste excavated soil and sludge. A large amount of waste excavation, sludge, etc. are generated during river construction and river management, but these can be used as guest soil by kneading a binder. Since the binder is kneaded into the soil, the soil layer is solidified to an appropriate hardness, and the water permeability can be made appropriate. As a result, waste excavation, sludge, and the like generated in large quantities due to river construction and the like can be effectively used.

Here, in the slope revegetation method of the present invention, an agent containing fly ash as a consolidating agent and having a soil particle connecting function while maintaining the soil neutral can be used. Fly ash is obtained by collecting fine ash particles contained in exhaust gas from a pulverized coal combustion boiler such as a thermal power plant with a Cottrell dust collector.
By kneading such a consolidating agent into waste excavation, sludge, and the like, soil particles can be gently connected to each other while maintaining the soil neutral regardless of an organic substance or an inorganic substance.

Accordingly, the odor and various organic substances contained in the soil are sealed so as not to be re-eluted, and no environmental pollution is caused even if the soil is used by using waste excavated or sludge. . In addition, since this binding agent does not alter the soil and can maintain the soil neutral, it does not hinder the growth of plants. In this case, by adjusting the amount of the binder used, it is possible to form a soil layer having appropriate hardness and water permeability. In addition, as a consolidating agent, for example, “Soft Farm (trade name)” sold by Earth Care Co., Ltd. or the like can be suitably used.

In the slope greening method of the present invention,
As the erosion inhibitor, a sprayable agent containing fly ash, which has water permeability and water retention after hardening, can be used. By using such an erosion inhibitor, spraying can be performed, improving work efficiency. After hardening, the vegetation layer can be prevented from being eroded by rainwater, etc. Properties can be further improved.

The erosion inhibitor has water permeability and water retention and does not deteriorate the soil of the plant growth layer, so that it does not adversely affect the growth of the plant. As the erosion inhibitor, for example, "Soft Stick (trade name)" which is a soil revegetation stabilizing and aggregating agent sold by Earth Care Co., Ltd. can be suitably used. This erosion inhibitor is a sprayable agent having a fast curing property,
Excellent permeability and water retention.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a cross-sectional structure of a greening slope according to an embodiment, and FIG. 2 is a perspective view showing a retaining mat member.

The present embodiment is an example in which a revegetation slope is formed on an existing concrete block revetment using waste excavation, sludge, and the like generated during river construction and river management.

First, waste excavation and sludge carried into the construction site were buried in a ridge shape, and a predetermined amount of “Soft Farm 10 (trade name)” sold by Earth Care Co., Ltd., which was a consolidating agent, was sprayed. After that, knead well using a backhoe or the like.

On the other hand, as shown in FIG. 1, a slope 9 of an iron slab block 10 forming a concrete block revetment.
On top of this, a retaining mat member 11 is laid, and an anchor material 12 is provided.
Is fixed to the slope 9. Then, as described above, after the soil is kneaded using the soil kneaded with the binding agent until the retaining mat member 11 is covered, shaping and compaction are performed on the back surface of the backhoe.

In this case, the retaining mat member 11 is the same as that shown in FIG.
As shown in the figure, since the spiral members 8 are formed side by side, even if the slope 9 has irregularities, it can be deformed along the unevenness, and can be securely fixed to the slope 9 without gaps. Can be.

Further, since the retaining mat member 11 used in this embodiment has a thickness of about 70 mm, the soil near the slope 9 is obtained by performing the soil removal until the retaining mat member 11 is covered. The guest soil layer is integrated with the retaining mat member 11 and is securely fixed to the slope 9.
In this embodiment, the thickness of the guest soil layer 13 is 170 mm.
However, the soil layer 13 was extremely firmly fixed to the slope 9.

Further, the retaining mat member 11 does not move in the direction of the slope 9 unlike the conventional net-shaped flat body even after the completion of the construction, even after a lapse of time. Can be prevented for a long period of time.

As described above, in the slope revegetation method of the present embodiment, the soil layer 13 is formed by using a material obtained by kneading a consolidating agent into waste excavated soil and sludge-containing soil. The soil particles could be gently connected while maintaining the property, and the soil layer 13 was solidified to an appropriate hardness and the water permeation state became good. In addition, this makes it possible to effectively use waste excavation, sludge, and the like generated in large quantities due to river construction and the like.

In the slope revegetation method of this embodiment, as described above, "Soft Farm 10" sold by Earth Care Co., Ltd. was used as a consolidating agent. By kneading this consolidation agent, waste excavations, odors and various organic substances contained in sludge are sealed and do not elute again. Greening work will not adversely affect the surrounding environment.

Further, by adjusting the amount of the binder used, the soil layer 13 having an appropriate hardness and water permeability can be formed. Since the binder does not alter the soil, As will be described later, the growth of the plant 15 in the guest soil layer 13 is not hindered.

Next, plant seeds,
The plant growth layer 14 is formed by spraying soil mixed with a fertilizer and an erosion inhibitor. In the plant growth layer 14,
Since plant seeds and fertilizers are included, after the completion of construction, watering is performed, and after a predetermined period elapses, the plant 15 grows and a greening slope excellent in aesthetic appearance is formed.

The roots of the plants 15 growing in the plant growth layer 14 gradually grow downward in the soil layer 13 and become intricately entangled with the retaining mat member 11. As the plant 15 grows, the effect of preventing the soil layer 13 from slipping down is strengthened, and a greening slope having excellent durability is formed.

Further, since the plant growth layer 14 contains an erosion inhibitor, it is not eroded by rainwater or the like, and the soil does not slip down. In the slope revegetation method of the present embodiment, "Soft Stick (trade name)" sold by Earth Care Co., Ltd. was used as an erosion inhibitor. Since this erosion preventive material is a spray-setting, fast-curing agent, the work can be performed efficiently, and after curing, it has good water permeability and water retention, so that an excellent erosion preventing effect is obtained. Was done. In addition, the erosion inhibitor does not alter the soil of the plant growth layer 14 or the like, and thus does not adversely affect the growth of the plant 15.

The present embodiment is an example of slope revegetation work on a concrete revetment. However, the slope revegetation method of the present invention is not limited to this embodiment. This technology can be widely used in the field of greening works on slopes.

[0038]

According to the present invention, the following effects can be obtained.

(1) A soil retaining mat member formed by arranging helical members in parallel is laid on a slope, fixed with an anchor member, and soil is applied until the soil retaining mat member is covered. Furthermore, by spraying soil mixed with plant seeds, fertilizers, and erosion inhibitors on the soil layer to form a plant growth layer, the soil does not slide down and has excellent durability.
Plant growth can also form good greening slopes.

(2) After fixing the retaining mat member on the slope, the greening slope can be formed only by laying the soil, so that the construction work is easy.

(3) Since a retaining mat member formed by arranging spiral members in parallel is used, it can be securely fixed even if the slope has irregularities. Because it is in an integrated state, it is securely fixed to the slope.

(4) Since the retaining mat member does not move in the direction of the slope after the construction is completed, the effect of preventing the soil from falling down can be maintained for a long time. In addition, the root of the plant is entangled with the retaining mat member, thereby also having an effect of preventing slippage of the soil.

(5) Since a plant growth layer is formed by spraying soil mixed with plant seeds, fertilizer, and an erosion inhibitor, erosion of the plant growth layer does not occur due to rainwater and slippage of the soil does not occur. .

(6) By using a soil obtained by kneading a binding agent into soil containing at least one of waste excavated soil and sludge, the soil is solidified to an appropriate hardness and has an appropriate hydraulic conductivity. The soil layer can be formed,
Odor and various organic substances contained in the sludge are sealed and do not elute again, so that no environmental pollution occurs. Therefore, a large amount of waste excavation, sludge, and the like generated during river construction and the like can be effectively used.

(7) As a solidifying agent to be kneaded with waste excavated soil, sludge, etc., it contains fly ash, and is used in a soil having a soil particle linking function while maintaining the soil neutral. Since the odor and various organic substances can be securely sealed to prevent re-elution, the effect of preventing environmental pollution is improved. In addition, the caking agent keeps the soil neutral and does not alter the soil, so that it does not hinder plant growth.

(8) A sprayable agent containing fly ash as an erosion inhibitor, which has water permeability after curing,
By using a material having water retention, construction can be performed efficiently, and an excellent erosion prevention effect can be obtained.
In addition, since it does not alter the soil, it does not adversely affect plant growth.

[Brief description of the drawings]

FIG. 1 is a diagram showing a cross-sectional structure of a greening slope according to an embodiment.

FIG. 2 is a perspective view showing a retaining mat member.

[Explanation of symbols]

 Reference Signs List 8 spiral member 9 slope 10 iron flat stone block 11 retaining mat member 12 anchor member 13 guest soil layer 14 plant growth layer 15 plant

Claims (4)

[Claims] 1. A soil retaining mat member formed by arranging spiral members in parallel is laid on a slope, and the soil retaining mat member is fixed to the slope with an anchor member until the soil retaining mat member is covered. After performing the soil, applying compaction, and further, spraying soil kneaded with plant seeds, fertilizers, and erosion inhibitors on the surface of the soil to form a plant growth layer, characterized by greening a slope. Construction method. 2. The slope revegetation method according to claim 1, wherein the soil is obtained by kneading a binder into soil containing at least one of waste excavation and sludge. 3. The slope greening method according to claim 2, wherein the consolidating agent is a chemical containing fly ash and having a function of connecting soil particles while maintaining the soil in neutral. 4. The method according to claim 1, wherein the erosion inhibitor is a sprayable agent containing fly ash and has water permeability and water retention after curing.