JP2002088740A - Channel revetment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a channel revetment for providing a channel close to the natural environment. SOLUTION: An approximately U-shaped revetment 1 constituted of side wall sections 2 and 2 consisting of two net-like plates 21 and 21 opposite arranged through a regular interval and the bottom section 3 consisting of ribs 31, 31, etc., bridging between the lower ends of the side wall sections 2 and 2 is placed in a ditch 60 formed in the ground, at the same time, a space between the net-like plates 21 and 21 of the side wall sections 2 and 2 is filled with stones 22, 22, etc., to form the channel 50. Aquatic plants can root in a gap between the stones 22 and 22 filling in the side wall sections 2 and 2, at the same time, water creatures live in the gap, water flowing in the channel can be purified through natural purification operation by the plants and creatures and, at the same time, the channel close to the natural view can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revetment for a waterway which forms a waterway itself or prevents erosion of a side wall or a bottom face of a waterway formed in a groove shape, and more particularly to a plant revetment. Seawall with a habitable environment for water and creatures.

[0002]

2. Description of the Related Art Seawalls that are connected to current rivers, agricultural waterways, waterways in parks, lakes and marshes, ponds, artificial ponds, fountain ponds, reservoirs, etc. (in the present specification, these are collectively referred to as "waterways"). In most cases, the quay is hardened with concrete, and it is the mainstream.

As an example, a method of revetment of a relatively small water channel will be described. For example, a concrete revetment 10 having a substantially U-shaped cross section is formed in a groove 60 formed by excavating the ground. Are arranged to form a water channel 50 ', and the concrete revetment 10 prevents the flowing water flowing in the water channel 50' from eroding the side walls and the bottom of the water channel 50 '(see FIG. 5). .

[0004]

In the water channel 50 'formed by embedding the concrete revetment 10 as described above, both the side wall and the bottom are formed by concrete walls. Although an excellent waterway 50 'is obtained in that the water flows at a constant flow rate without interruption, aquatic plants are rooted on the side wall and the bottom, or serve as a habitat for aquatic organisms such as fish, insects, shrimp, and crab. There are no such irregularities or gaps, and it can be used only for the purpose of flowing water.

[0005] The aquatic plants bred in the waterway serve as a filter medium for removing suspended suspended matter in the flowing water by the roots developed in the water, and the roots of the aquatic plants developed in the water include a rhizosphere. Microorganisms proliferate and produce the aforementioned suspended suspensions, organic matter, nitrogen,
Helps break down nutrients such as phosphorus. for that reason,
Propagation of such aquatic plants has helped to prevent eutrophication of waterways.

[0006] The waterways in which aquatic plants have bred are shrimp,
Crustaceans such as crabs and crayfish, larvae of goats and fireflies, and other insects, shellfish such as crabs, fish, and other aquatic organisms that feed on them are abundant and have abundant places to live or hide. The breeding is easily carried out, and therefore, it is expected that such aquatic organisms can purify the water quality by predation of, for example, carcasses of animals and food wastes that have flowed into waterways together with domestic wastewater.

[0007] The environment in which such aquatic plants breed and fly such as fireflies and dragonflies that have emerged from aquatic organisms,
It gives people peace and security, and is also beautiful as a landscape.

In order to form such an environment in which aquatic plants and aquatic organisms can grow in rivers, waterways, etc., stones are sealed in baskets or nets formed by metal wires or the like, and baskets filled with the stones. Or, a method of forming a revetment wall or a riverbed by stacking nets has also been proposed, but in this method, it is necessary to form a waterway bottom and side walls separately by stacking the above-described baskets or nets, and it is complicated. However, relatively large-scale civil engineering work is required. In addition, this method is not suitable for application to relatively small-scale waterways, and it is desired to form waterways in which aquatic plants and aquatic organisms can easily grow.

The present invention has been made to solve the above-mentioned drawbacks in the prior art, and is provided in a groove formed on the ground instead of a conventional concrete seawall called a "U-shaped groove". By providing a waterway revetment that can provide a waterway having an environment in which aquatic plants and aquatic organisms can easily grow, a waterway that can purify water with good landscape and natural purification ability The purpose is to provide.

[0010]

In order to achieve the above-mentioned object, a water channel revetment according to the present invention comprises two side walls 2, 2 opposed to each other with a predetermined space therebetween, and It has a substantially upward U-shape or U-shape consisting of a bottom portion 3 connecting the lower ends thereof, and is preferably disposed in a groove 60 formed in the soil, and forms a waterway itself or is formed in a groove shape. The side walls 2 also have two net-like plates, each of which is opposed to each other with a predetermined space therebetween, and also functions as a channel revetment capable of preventing erosion of the provided channel. A large number of stones 22 are formed between the two mesh plates 21, 21 so as to be able to be stored and held, and the mesh plates 21 of the side wall portions 2, 2 located at least on the both side walls 61, 61 side of the groove 60 are attached to the two side walls 61. , 61, and the bottom 3 is
It comprises a rib 31 connecting the side walls 2 and 2, and preferably the rib 31 directly contacts the soil on the bottom surface 62 of the groove 60 (claim 1).

In the above-mentioned water channel revetment 1, it is preferable that the side walls 2, 2 and the bottom 3 are made of cast iron (claim 2).

Further, the bottom portion 3 is provided with the side wall portions 2 and 2.
Ribs 31, 31,...
It is preferable that the reinforcing ribs 32 be formed by reinforcing ribs 32; 33, 33,.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a channel revetment 1 of the present embodiment is shown.
Has a wire mesh shape made of cast iron, and is formed of side walls 2 and 2 forming side surfaces of the water channel 50 and a bottom portion 3 forming a bottom surface.

The reason why the water channel revetment 1 of the present invention is made of cast iron is that iron and minerals contained in the cast iron are effective for the growth of living organisms and plants, and that the vegetation can be recovered at an early stage. Is resilient in material, and therefore is effective as a revetment for the channel 50 because the channel revetment 1 itself is strong.
When the stone is filled inside, it has sufficient resistance to the weight of the stone.

At least the side wall portions 2 of the waterway revetment 1
2, two wire mesh plates 21 as shown in FIG.
The wire mesh plate 2
A large number of stones 22, 22,... Are formed between 1 and 21 so as to form a space that can serve as a nursery for aquatic plants and the like and as a nest for aquatic insects and other aquatic organisms.

The lower ends of the side walls 2, 2 are connected by ribs 31, 31,... Made of a reinforcing steel or the like formed of cast iron in order to maintain a predetermined distance between the side walls 2, 2. The bottom 3 of the revetment 1 is formed by the ribs 31, 31,.

In this embodiment, the side walls 2, 2
In addition to the above-mentioned ribs 31, 31,... Connecting the spaces, reinforcing ribs 32 crossing the ribs 31, 31,. About 3
Reinforcing ribs 33 crossing at an angle of about 0 ° C.
To increase the contact area between the soil forming the bottom surface 62 of the groove 60 and the bottom 3 of the waterway revetment 1, and to increase the contact area between the soil 3 and the bottom 3 of the waterway revetment 1 by flowing water in the waterway 50.
Erosion of the soil that forms

In the sea channel revetment 1 according to the present embodiment shown in FIG. 1, the bottom 3 of the water channel revetment 1 is formed by a grid or mesh formed by the combination of the ribs 31, 32 and 33 as described above. However, it is also possible to arrange a mesh plate on the bottom portion 3 so as to oppose in the vertical direction so that a stone can be filled between the mesh plates.

Two mesh plates 21 and 2 forming side walls 2 and 2
1 is a stone 22 filled in the space between the mesh plates 21 and 21;
Are formed to such a degree that they do not fall through the mesh, and in the present embodiment, the bones are further obliquely arranged between the lattice-like aggregates provided in the vertical and horizontal directions. Materials are provided to form the shape shown in FIG.

In the waterway revetment 1 formed as described above, a groove 60 having a width and depth in which the waterway revetment 1 can be arranged is excavated, for example, by excavating the ground, and the present invention is formed in the groove 60. The revetment for waterway 1 is located.

The waterway revetment 1 is disposed directly in the groove 60 where the soil is exposed, and no concrete or the like is cast between the waterway revetment 1 and the groove 60 excavated on the ground.

The revetment for a waterway of the present invention can be used not only when the waterway 50 is formed by cutting a groove 60 in the ground, but also in a river or a waterway where the revetment by concrete is not performed. 1 may be disposed to protect the seawall, and the concrete seawall already buried in the waterway, the so-called "U-shaped groove" may be removed, and the concrete seawall according to the present invention may be used instead of the concrete seawall. The revetment 1 may be arranged and formed, and the construction method is not limited to the above-described method as long as the revetment 1 for a waterway of the present invention can be arranged on the ground in a form in direct contact with the soil.

Thus, the waterway revetment 1 of the present invention is provided.
Is disposed in a groove 60 formed in the ground, the soil forming the side walls 61 of the groove 60, the side wall portion 2 of the channel revetment 1
2 is in direct contact with the soil forming the bottom surface 62 of the groove 60, while the bottom 3 of the channel revetment 1 is in direct contact with the soil.
Is placed within.

The water channels 50 are formed by packing stones 22, 22,... Of appropriate size and quantity into the side walls 2, 2 of the water channel revetment 1 arranged in the groove 60 in this way. . The stones 22, 22, ... are not limited to the case where the revetment 1 filled with the stones 22, 22, ... is not limited to the case in which the stones 22, 22, ... are filled after the disposition of the revetment 1 of the present invention. It may be arranged in the groove 60, and the operation procedure is not limited to the above-described one.

When forming the water channel 50, the side wall portions 2,
For example, seeds and seedlings of aquatic plants may be planted in the voids formed between the stones 22 put into the area 2, and in this case, the area where the water channel 50 is formed In addition, desired plants suitable for growing in the environment can be intentionally bred, and vegetation can be recovered earlier.

In the water channel 50 constructed as described above, when water is introduced into the water channel 50, the water is
0 flows from the upstream to the downstream.
The water flowing in the inside is also introduced into the gap formed between the stones 22 filled in the side wall portions 2 and 2.

The water channel 50 thus formed is formed by the water channel 50 by the side walls 2 and 2 and the bottom 3 of the water channel revetment 1.
The water flowing in the inside is protected without erosion of the earth and sand, and the water flowing in the waterway 50 is protected by
2 flows through the gaps formed between the stones 22 filled in the stones 2, the gaps function as nurseries for the aquatic plants, and the stones 22 and the stones 22 on which the roots of the aquatic plants are spread
The inside of the crevice serves as a breeding bed for rhizosphere microorganisms, crustaceans such as shrimp, crabs and crayfish, insects such as larvae of goats and fireflies, shellfish such as crabs and other aquatic organisms.

The waterway 50 thus formed by using the waterway revetment 1 of the present invention is almost completely covered with plants in about half a year, and a waterside landscape close to a natural environment is created. In addition, by the restoration of vegetation on the quay portion of the waterway 50, the roots of the plants are stretched between the stones 22, 22 of the side wall portions 2, 2, thereby providing a strong seawall which is less likely to be eroded.

The waterway 50 in which the plants have propagated in this way is
In the summer, the shade is formed by the vegetation bred in the summer, there is no sharp rise in the water temperature, and the water temperature is constant,
The environment becomes suitable for the inhabitation of living things, and the corrosion of water due to excessive rise in water temperature hardly occurs.

Further, since the soil is exposed on the floor surface of the water channel 50, plants can grow not only on the side surface but also on the bottom surface of the water channel, and aquatic organisms can be propagated.

[0032]

According to the structure of the present invention described above, the waterway revetment of the present invention is formed in a substantially U-shape in which the side wall and the bottom are connected and integrally formed. The relatively simple work of placing the pits in the grooves formed on the ground can prevent the erosion of the waterway by running water, effectively protect the seawall, and fill the gap between the mesh plates on the side walls. As a result, a waterway having an environment in which aquatic plants and aquatic organisms can grow can be provided.

A waterway provided with an environment in which aquatic plants and aquatic organisms can grow as described above can purify flowing water flowing through the waterway by a natural purifying action, and provide a beautiful natural scenery that gives people peace of mind and security. It is provided.

In addition, in the revetment for a waterway of the present invention, which is made of cast iron, it has a favorable effect on aquatic plants and aquatic organisms, and the vegetation and the like after construction can be recovered at an early stage. . In addition, cast iron seawalls have sufficient strength to be used as seawalls.

Further, in a waterway revetment provided with a rib connecting the side wall portions and a reinforcing rib intersecting at an angle to the rib, the waterway revetment has a bottom portion. While the strength is improved, the contact area between the bottom of the channel revetment and the bottom of the groove is increased, and erosion of the bottom by running water can be suitably prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of an essential part of a waterway formed by a waterway revetment of the present invention.

FIG. 2 is a plan view of a channel revetment.

FIG. 3 is a front view of a channel revetment.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view of a main part of a conventional water channel using a concrete revetment.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 (for waterway) Seawall 2 Sidewall (seawall) 21 Reticulated plate 22 Stone 3 Bottom (seawall) 31 Rib 32, 33 Reinforcing rib 10 'Concrete seawall (conventional example) 50, 50' Waterway 60 Groove 61 Side wall (Of the groove) 62 Bottom (of the groove)

Claims (3)

[Claims] 1. A substantially upward U-shaped or U-shaped configuration comprising two side walls opposed to each other with a predetermined distance therebetween and a bottom connecting the lower ends of the side walls. A large number of stones are formed between two mesh plates, each of which is opposed to each other with a predetermined space therebetween, and are formed so as to be able to store and hold a large number of stones. And the bottom portion is formed of a rib connecting the side wall portions, and the rib is preferably in direct contact with the soil on the bottom surface of the groove. 2. The revetment for a waterway according to claim 1, wherein the side wall and the bottom are formed of cast iron. 3. The waterway according to claim 1, wherein the bottom comprises a rib bridged between the side walls and a reinforcing rib intersecting at an angle with the rib. Seawall.