JPH1171760A - Revetment greening method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a revetment greening method capable of restoring the growing environment of animals and plants as well as natural landscape and expecting the creation of the living environment of aquatic animals and the purification of water. SOLUTION: In a greening method of revetment such as rivers, lakes and marshes, a double structural bag body 2 formed of an inside bag and a reinforcing outside bag is filled with at least one kind of plant seeds 3, stalks and leaves 4 and roots 5 and a mixture of plant growing soil 6 and stone 7, and a mesh of the inside bag is so set that the outflow of the plant seeds 3 or the plant growing soil 6 is prevented and that the germination and growing of plants can be made. A mesh of the outside bag is so set that the stone 7 can be held to smoothly grow the plants, and revetment greening material A having the bag body 2 filled with the mixture is placed in a recessed storing section 1a for revetment materials.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revetment revegetation method for vegetation revetment on rivers, lakes and marshes, and other shores of regulating ponds (for example, slopes of embankments or low water level of rivers). It is about.

[0002]

2. Description of the Related Art For revetment of rivers, lakes and marshes, a method of arranging revetments such as large concrete blocks and stone-filled futon cages obliquely or on a shore is widely used.

[0003]

However, in the above-mentioned revetment using concrete blocks or stone-filled futon cages,
The surface of the blocks and crushed stones is exposed, and the appearance is poor in view. In addition, the growth environment and natural scenery of flora and fauna originally possessed by rivers, lakes and marshes are impaired.

According to the present invention, a revetment revegetation material is stably accommodated in a revetment material such as a concrete block or a futon cage having a concave accommodating portion, and the revetment is actively greened by vegetation. The purpose of the present invention is to provide a seawall revegetation method that can restore the landscape, create a habitat for aquatic animals and plants, and purify the water quality.

[0005]

The technical means taken by the present invention to solve the above-mentioned problems are as follows. That is, a revetment method for revetments such as rivers and lakes is claimed in claim 1.
In the invention described in the above, the bag of a double structure by the inner bag and the outer bag for reinforcement, at least one of plant seeds and foliage and root stock, and a soil for plant growth, filled with a mixture of stone, the said The size of the inner bag is set to a size that prevents the outflow of plant seeds and soil for plant growth and allows the plant to grow and grow, and the size of the outer bag can hold the stone. The revetment greening material, which is set to a size that does not hinder the growth of plants and is filled with the mixture in the bag, is disposed in the concave storage portion of the revetment material.

The revetment revegetation material may be formed in a mat shape so as to be accommodated in the concave accommodation portion of the revetment material, or may be configured in a columnar shape so as to be arranged in the concave accommodation portion of the revetment material. .

According to the revetment revetment method, since the revetment revegetation material is heavy by filling the bag with soil for plant growth and stones, the revetment revegetation material is not flushed with water, and is not concave. At least one kind of plant seeds, etc., which are stably placed in the storage area and filled with revetment revegetation material, will eventually germinate and root, and due to the growth of these plants, revetment with concrete blocks, futon cages, etc. will be revegetated. Is done.

In the revetment revetment, if there is a concern that the revetment greening material may be displaced or run off due to a relatively steep flow at the time of rising water, the revetment may be reclaimed. What is necessary is just to cover this revetment revegetation material with a net for preventing runoff so as to cover the revegetation material, and to hold the net on the revetment material.

[0009] In addition, at the time of rising water in a rapid river, cobbles and sand are vigorously washed away by a sudden flow of water, and there is a concern that the bags collide with each other and break the bag. In addition to the soil for plant growth and even the stones that are sucked out, destroying the vegetation base,
Preferably, as described in claim 3, the revetment revegetation material is covered with a mat of corrosive fiber which does not hinder the growth of plants, so as to cover the revetment revegetation material. This is to cover the net and hold the net on the revetment material to protect the bag of revetment greening material from cobbles, sand, and the like that are rushed away.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a revetment greening method using a concrete block 1 as a revetment material.

In this greening method, at least one of a plant seed 3, a foliage 4 and a root stock 5 and a plant growing soil 6 are formed in a bag 2 having a double structure comprising an inner bag 2A and an outer bag 2B for reinforcement. ,
The mixture with the stone 7 is filled to form a columnar revetment revegetation material A, and the revetment revegetation material A is arranged in the concave accommodating portion 1 a of the concrete block 1.

Then, the upper part of the revetment greening material A is covered with a mat 8 of corrosive fiber which does not hinder the growth of plants,
A net 9 for preventing spillage is put on the upper part of the mat 8 and a net holding anchor 10 for pressing the net 9 is cast on the concrete block 1 to use the soil 6 for plant growth as a medium. , Plant seed 3 and foliage 4
The root stock 5 is sprouted, rooted and grown, and the revetment of the concrete block 1 is greened by vegetation.

When placing the holding anchor 10, for example, an anchor hole is formed at a predetermined position of the concave receiving portion 1a of the concrete block 1, and this anchor hole is
A nut 11 which is expanded by a wedge accompanying the driving is driven in, and a holding anchor 10 is screwed to the nut 11, and after the holding anchor 10 is screwed, the revetment revegetation material A is placed in the concave receiving portion 1a. In addition, if necessary, crushed stones, gravel, locally generated soil 12 and the like are buried in the gaps in the concave accommodating portion 1a, and then the mat 8 and the net 9 are covered, and the nut 14 is held via the metal plate 13. It is convenient in terms of procedure to screw on the anchor 10 and hold down the net 9.

The diameter and the length of the revetment revegetation material A are arbitrarily set, but according to the size of the concave receiving portion 1a of the concrete block 1, for example, the concave receiving portion 1a is 100 cm ×
If it is 100 cm, its diameter should be 20-30 cm
If the length is set to 50 cm or 100 cm, the revetment revegetation material A can completely fill the concave accommodating portion 1a without any gap, which is preferable in terms of construction.

Further, if the columnar revetment greening material A is arranged in the inclination direction of the revetment, the revetment revegetation material A functions as a drainage channel, so that drainage during rainfall is quickly performed. The revetment revegetation material A may be arranged along the water surface, and the revetment revegetation material A may be configured in a mat shape so that the revetment revegetation material A is accommodated in the concave accommodating portion 1a of the concrete block 1.

The inner bag 2A is made of a fiber such as polyester or acrylic, and its purpose is to prevent the outflow of the plant seeds 3 and the soil 6 for plant growth and to enable the plants to grow and germinate. The size is set, for example, to 1 mm to 2 mm, and the reinforcing outer bag 2B is formed by forming a plastic net into a cylindrical shape. Is set so as not to hinder the growth of the plant, for example, 10 mm to 20 mm.

Examples of the plant seeds 3 include herbaceous seeds such as Kentucky 31 fescue, bermudagrass, and reed canary grass, and woody seeds such as weasel hagi. , Weasel, willow and the like are used.

In this embodiment, three types of plant seeds 3, foliage 4 and root stock 5 are filled, but any one or two types may be filled and the inner bag may be filled. The mixture of the mixture to be filled into 2A is determined by the installation location, river water level,
Although it is arbitrarily adjusted depending on weather conditions and the like, from the viewpoint of protection of the local vegetation, it is preferable to fill the root stock 5 of the local vegetation.

The soil 6 for plant growth includes bark compost,
Artificial soil such as peat moss, horticultural soil using incinerated ash as a raw material, soil generated on site, and the like, and a mixture of these and a water purification material such as fertilizer or activated carbon are arbitrarily selected and used. The stone 7 to be filled in the inner bag 2A of the revetment greening material A has a particle size of 50 mm or more.
Although crushed stone of about 70 mm is used, it may be gravel or a mixture of these.

As the mat 8 made of corrosive fiber which does not hinder the growth of the plant, a coconut leaf knitted to about 10 mm to 20 mm is used. As the net 9 for preventing runoff, a wire mesh or expanded metal is used. For example, 50m
Those having a size of m to 100 mm are used.

According to the above-mentioned revetment revegetation method, the revetment revegetation material A is stably arranged in the concave receiving portion 1a of the concrete block 1 by the weight of the plant growing soil 6 and the stone 7 filled in the bag body 2. In addition, the upper part of the revetment revegetation material A is covered with a mat 8, and furthermore, a net 9 for preventing runoff is put on the upper part of the mat 8, and the net 9 is pressed down by a holding anchor 10. Therefore, for example, even if the revetment of a rapid river is targeted, and even if the water is increased and the revetment greening material A is flooded, the plant seeds 3 filled in the inner bag 2A and the revetment of the revetment greening material A are lost. And soil for plant growth 6
Is suitably prevented.

That is, in addition to the heavy weight of the revetment revegetation material A, the revetment revegetation material A is held down by the net 9, so that the revetment revegetation material A is reliably prevented from flowing out. Since the revetment revegetation material A is covered with the mat 8 and the revetment revegetation material A and thus the inner bag 2A are isolated from the water basin, there is no danger that the cobbled stones and gravel rushed against the inner bag 2A. Therefore, since the inner bag 2A is not damaged, the suction of the plant seeds 3 and the like and the soil 6 for plant growth is suitably prevented, and the vegetation base of the mixture filled in the inner bag 2A is securely held. Will be.

When a predetermined period has elapsed after the revetment revegetation material A has been placed, as shown in FIG. 4, the plant seeds 3, the foliage 4 and the root stock 5 filled in the bag body 2 And water from lakes and marshes, rainwater, etc.
Absorbs the nutrients contained in the soil, and germinates and roots using the plant growing soil 6 as a culture medium. With the growth of these plants, the revetment is greened by the concrete block 1, and the growth environment and the natural landscape of animals and plants Will be recovered.

The greening of the waterfront provides an optimal habitat for aquatic animals and also serves as a habitat for useful microorganisms involved in water purification, contributing to the direct purification of rivers and the like.

If the mixture to be filled in the inner bag 2A of the revetment revegetation material A is mixed with a soil aggregating agent such as polyethylene oxide or polyacrylamide, or a superabsorbent polymer such as acrylamide, etc. It is preferable because the water retention of the revetment greening material A itself can be enhanced.

In the above-described embodiment, the concrete block 1 is used as a seawall, but the present invention can be suitably carried out by using a futon cage for packing seawall by packing crushed stones or the like.

That is, as shown in FIG. 5, a shore protection futon cage 21 originally provided with a concave storage portion 21a for packing crushed stones or the like is laid on the slope of the shore as shown in FIG. As shown in FIG. 7, when the crushed stones 22 are stored in the concave storage portion 21a of the overlapping portion as necessary, and By arranging the revetment greening material A in the concave accommodating portion 21a, the revetment can be actively greened by vegetation.

At this time, if there is a concern that the revetment greening material A may be lost due to the relatively steep flow at the time of water increase, the revetment greening material A may be covered with a net for preventing the revetment greening material A so as to cover the revetment greening material A. 9, the net 9 may be fastened to the futon cage 21 by a line 23 or the like.

Alternatively, when the water is increased in a rapid river, cobblestones and sand vigorously collide with the revetment greening material A, and the revetment greening material A
If it is feared that the bag body of the above will be torn, cover the revetment revegetation material A with a mat 8 of corrosive fiber which does not hinder the growth of the plant before putting the net 9 on the revetment, and revet the cobblestone and sand. What is necessary is just to protect the greening material A.

In a place where a torrent flows in a rapid river when the water increases,
Since there is a concern that the futon cage 21 containing the revetment revegetation material A may be washed away, it is preferable to use a concrete block as the shore protection material. However, if the futon cage 21 is fixed to the ground by an anchor, it may be a torrent part. Is also feasible.

[0031]

According to the first aspect of the present invention, the inner bag reinforced by the outer bag is filled with a mixture of plant seed, at least one of the foliage and the root stock, soil for plant growth, and stone. Since the revetment greening material is used, the revetment revegetation material will be stably placed in the recessed storage section of the revetment material, due to the weight of the stone serving as the filler aggregate and the soil for plant growth,
Even in places where there is water flow, the revetment greening material can be securely fixed by its own weight.

According to the second aspect of the present invention, the revetment revetment is covered with a net for preventing runoff so as to cover the revetment revegetation material, and the net is retained on the revetment material. Even so, the revetment greening material is reliably prevented from being displaced or washed away.

According to the third aspect of the present invention, the revetment greening material is covered with a mat of corrosive fiber which does not hinder the growth of the plant, and the revetment greening material and thus the inner bag are isolated from the water basin. Even if the boulders or gravel are washed away by the sudden flow of water in the river, there is no danger that these boulders will collide with the inner bag.Therefore, the inner bag will not be damaged. Suction of the soil for plant growth and the like is appropriately prevented, and the vegetation base of the mixture filled in the inner bag is securely held.

In any of the above inventions, at least one kind of plant seeds, foliage, root stock, etc. contained in the revetment revegetation material after a predetermined period elapses, contains water and nutrients contained in the soil for plant growth. By absorbing and the like, the plant growth soil is used as a medium to pass through and root, and the growth of these plants achieves greening of the revetment, thereby restoring the growth environment and natural landscape of animals and plants.

The greening of the waterfront provides an optimal habitat for aquatic animals and also serves as a habitat for useful microorganisms involved in water purification, contributing to direct purification of rivers and the like.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a revetment greening method using a concrete block.

FIG. 2 is an exploded perspective view of a base material for revetment greening arranged in a concave accommodating portion of a concrete block.

FIG. 3 is a cross-sectional view of a concrete block revetment on which a revetment greening base material is arranged.

FIG. 4 is an explanatory diagram showing a greening state of a seawall by vegetation.

FIG. 5 is an explanatory diagram of a greening method using a futon cage according to another embodiment.

FIG. 6 is an explanatory view of a seawall using a futon cage on which a seawall greening base is arranged.

FIG. 7 is a sectional view of a revetment in which futon cages are arranged stepwise.

[Explanation of symbols]

1 ... concrete block (seawall material), 1a, 21a ...
Recessed accommodation part, 2A ... inner bag, 2B ... outer bag, 3 ... plant seed,
4 foliage, 5 root stock, 6 plant growth soil, 7 stone
8: mat of corrosive fiber, 9: net for preventing runoff, 1
0 ... holding anchor, 21 ... Futonkago (seawall material), A ...
Seawall greening material.

Claims (3)

[Claims] 1. A revetment method for revetment of a river or a lake, comprising a bag having a double structure comprising an inner bag and an outer bag for reinforcement, at least one of a plant seed, a foliage and a root stock, and a plant growing plant. Soil, filled with a mixture of stones, the inner bag is set to a size that prevents outflow of plant seeds and soil for plant growth and enables the plant to grow and sprout, Is set to a size that can hold the stone and does not hinder the growth of the plant, and fills the bag with the revetment greening material, which is filled with the mixture, in the concave storage portion of the revetment material. A revetment revegetation method characterized by placement. 2. The revetment revegetation according to claim 1, wherein the revetment revegetation material is covered with a net for preventing runoff so as to cover the revetment revegetation material, and the net is held by the revetment material. Construction method. 3. The revetment revegetation material is covered with a mat of corrosive fiber which does not hinder the growth of the plant, so as to cover the revetment revegetation material, the mat is covered with a net for preventing runoff, and
The revetment greening method according to claim 1, wherein the net is held by a revetment material.