JPH101925A - Revetment wall made of stone-charged cage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an control effect of water by juxtaposing stone-charged cages on the riverside in a state where its corner is turned and projected toward the center of river, and superimposing them vertically in a plurality of steps. SOLUTION: Stone-charged cages 2A are juxtaposed at the side of a river 3 in a manner that its axial line 5 is oblique with respect to the water stream with each corner part 6 being directed toward the center of the river 3, and they are superimposed in a plurality of steps upward and downward with the consequence that a revetment wall is formed. Next, the cages 2A on the upper steps is moved rearward in the axial line 5 direction of the cages 2A on the lower steps for making an inclination on the revetment wall 1A. Then, the revetment wall 1A performs a water control effect because the serrated unevenness of the wall surface changes the direction of a water stream to relieve the flow speed. The water stream 4 hits against the corner parts 6 to be in turbulence to take in and stir up air, resulting in obtaining an excellent purifying effect. Furthermore, recess parts 7 at the downstream side of the corner parts 6 form bay parts to be a living area or refuge for water plants and fish because of a small speed of flow. Thus, the construction can be done readily, besides, a protection effect of erosion in the river and natural view thereof can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a river revetment wall formed by a stone basket.

[0002]

2. Description of the Related Art Conventionally, the main focus of river construction has been on how to smoothly and quickly lead water to the sea and drain the water in order to minimize damage caused by flooding and flooding caused by rainfall. For this reason, efforts have been made to construct smooth revetments on both banks of the river by constructing embankments with concrete, blocks, etc. so that there are few curved or uneven parts that hinder the flow of water. Recently, however, the idea of preserving and creating abundant nature in harmony with human life has been developed, and a multi-natural river construction method based on this has been introduced. Considering the favorable growth environment of living creatures, it has come to be put into the preservation or creation of a beautiful natural landscape. Specifically, avoiding excessively short-circuiting the curved part of the river, setting a standard cross section for the river width, and avoiding a uniform river width.
Based on sufficient consideration of the hydraulic characteristics and the conditions of the hinterland, the direction was chosen to select a construction method that takes into consideration the conservation and creation of a favorable growth environment for living creatures and natural scenery. And as a thing suitable for such a multi-natural river construction method,
Stone baskets such as baskets are gradually being reviewed. This stone basket is superior in flexibility, water permeability and cushioning, and uses natural stone, so it is possible to secure a good growth environment for living things and at the same time, beautiful natural scenery Has the advantage that it can be maintained or created. However, in the conventional river construction method using a stone basket, since a plurality of stone baskets are smoothly arranged in a straight line or in a curved line along the river, the water control effect of relaxing the flow velocity of water is poor, Therefore, there is a problem that the effect of preventing erosion of the revetment and the effect of forming a gentle flow area that becomes a living area or an evacuation area for living things are lower than expected. Moreover, unlike natural dikes, revetments are monotonous, and it was not sufficient in terms of conservation and creation of natural scenery.

[0003]

SUMMARY OF THE INVENTION It is a main object of the present invention to use a stone basket to form a river embankment that excels in water control and natural scenery. Another object of the present invention is to form a strong revetment wall in which a stone basket does not move or fall off due to a water flow.

[0004]

According to the present invention, in order to solve the above-mentioned problems, a plurality of stone baskets each having at least one corner are formed so that each corner projects toward the center of a river. In this manner, a river revetment wall made of stone-filled baskets, which is juxtaposed along the river and stacked in a plurality of stages vertically, is provided.
Further, according to the present invention, by arranging a plurality of stone squirrel cages each having a rectangular parallelepiped shape with respect to the water flow,
Provided is a river shore wall made of stone squirrel cage, which is arranged in parallel along the river with its corners projecting toward the center of the river and is vertically stacked.

According to the revetment wall of the present invention having the above-mentioned structure, the wall surface of the stone-filled basket is made uneven by installing the stone-filled baskets with the corners of the stone-filled basket protruding toward the center of the river. Due to the formation, near the riverbank, the water flow direction is changed or the water flow is reduced due to the unevenness of the wall surface, so that a superior water control effect is obtained and the erosion prevention effect of the revetment is enhanced Not only is a good growth environment for the organisms secured, such as the downstream side of the projecting corners becoming a living area for the organisms or a gentle stream as an evacuation zone. Further, by forming the wall surface of the revetment wall in a concavo-convex shape, it is possible to obtain a landscape that is close to nature and cannot be obtained from a smooth linear or curved monotonous wall surface. Moreover, a very simple means of protruding the corners of the stone basket toward the center of the river makes it possible to reliably form a revetment wall with uneven walls, and the shape of the uneven surface is Various settings can be made by adjusting the direction of the basket, the mutual position, and the like.

According to a specific configuration aspect of the present invention, the stone stuffed baskets in at least a part of the stacked tiers of stone stuffed baskets are positioned forward and backward so that the stone stuffed baskets located higher are located rearward. Are arranged so as to be offset from each other. In the present invention, preferably, each of the cuboid-shaped stone baskets is disposed so that the axis is inclined downstream from a direction perpendicular to the water flow. As a result, when the water stream collides with the side face upstream of the corner portion of the stone basket, the pressing force by the water stream acts on this side face, but the component force acts in the axial direction of the stone basket,
The stone basket will be pushed in the axial direction, that is, in the depth direction of the revetment wall. For this reason, the stone basket is strongly pressed against the river bank to maintain a stable state, and does not move or fall off due to the water current.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 3 show a first embodiment of the present invention. The wall 1A is formed by a rectangular-shaped stone basket 2A having a rectangular parallelepiped shape. The stone-filled cage 2A is formed by a wire mesh material such as a diamond-shaped wire mesh or a welded wire mesh, and natural stones are filled therein.
By disposing the axis 5 obliquely with respect to the river 3, the corner 6 protrudes toward the center of the river 3.
Are arranged side by side on the left and right, and a plurality of stacked vertically. Thereby, the wall surface of the revetment wall 1A is formed as a substantially saw-toothed uneven surface.

As can be seen from FIG. 2, each of the above-mentioned stone baskets 2A is arranged with the axis 5 inclined downward from a direction perpendicular to the water flow 4, and the upper and lower stone baskets 2A are , The upper one is located right above the lower one, and in some or all of the upper ones, the upper stone filling basket 2A
Is arranged so as to be retracted from the lower stone stuffed basket 2A toward the rear side in the direction of the axis 5 by a required distance, whereby the revetment wall 1A is provided with a necessary inclination. The above-mentioned stone baskets 2A may be connected to each other vertically and horizontally adjacent to each other by appropriate means. The sawtooth shape of the wall surface can be made substantially uniform or non-uniform as the whole revetment wall 1A by adjusting the axial position of the adjacent stone basket 2A.

The revetment wall 1A having the above-described structure is formed by projecting the corners 6 of the respective stone-filled baskets 2A toward the center of the river 3 so that the wall surface has a substantially saw-toothed uneven surface. In the vicinity of the riverbank, the above unevenness changes the direction of the flow of water and reduces the flow velocity, so that an excellent water control effect can be obtained. At the same time, the water flow 4 collides with the corner 6 to become turbulent. By taking in air and stirring, excellent purifying action can be obtained. In particular, the concave portion 7 on the downstream side of the protruding corner portion 6 forms a bay though it is small, and since the flow velocity is small in that portion, it becomes a survival area or an evacuation area for water plants, small fish, etc. Safe growth environment is ensured. Moreover, since the flow velocity is mitigated by the water control, the effect of preventing erosion on the revetment will be enhanced.

Moreover, since the stone basket 2A is arranged with its axis 5 inclined toward the downstream side of the direction perpendicular to the water stream 4, the water stream 4 collides with the side surface upstream of the protruding corner portion 6. Then, a pressing force by the water flow 4 acts on this side surface, and the component force acts in the direction of the axis 5 of the stone basket 2A.
For this reason, the stuffed basket 2A is pressed in the direction of the axis line 5, that is, in the depth direction of the revetment wall 1A. No dripping or falling off. Furthermore, revetment wall 1A
By forming the wall surface of the surface as uneven, it is possible to obtain a landscape rich in changes close to nature, which cannot be obtained from a smooth linear or curved monotonous wall surface.

In the above embodiment, the stone stuffing basket 2A is arranged to be inclined to the downstream side from the direction perpendicular to the water flow 4. However, in places where the pressing effect by the water flow 4 is not particularly required, the upstream is used. It may be arranged to be inclined to the side. The angle at which the stone basket is tilted to the upstream side or the downstream side does not have to be 45 degrees, and may be more or less than that. Further, the upper and lower stone stuffing baskets 2A are arranged so that the upper ones are located directly above the lower ones.
A can also be disposed so as to straddle two adjacent stone-filled baskets 2A.

FIG. 4 shows a second embodiment of the present invention.
In this embodiment, an irregular hexagonal stone packing basket 2B in which the short side of a rectangle is projected outward in a chevron shape.
Is used to form the revetment wall 1B. In this case, each stone stuffing basket 2B is disposed so that the axis is oriented substantially perpendicular to the water flow 4, and the upper stone stuffing basket 2B is straddled over two adjacent stone stuffing baskets 2B in the lower stage. It is arranged to be placed. Of course, in this second embodiment as well, each stone basket 2B is
As in the first embodiment, it can be installed to be inclined upstream or downstream with respect to the water flow 4, or the upper stone basket can be placed directly above the lower stone basket.

The shape of the stone squirrel cage that can be used in the present invention is not limited to that shown in each of the above embodiments, and stones having any other square shape such as a square or a triangle in plan view can be used. Packing can be used. In short, it is sufficient if the stone basket has at least one corner.
In addition, the stone basket in each of the above embodiments is formed using a metal net made of a metal material, but may be formed using a net made of a nonmetal material such as reinforced plastic. Of course, it can also be formed using a coated wire in which a metal wire is covered with plastic. Further, it is not always necessary to form a revetment wall using the same shape and the same standard stone-filled basket, and it is also possible to mix different-shaped or different-standard stone-filled baskets.

[0014]

As described above, according to the present invention, a plurality of stone baskets having at least one corner are arranged side by side along the river with the corners protruding toward the center of the river. By constructing and stacking multiple steps vertically, it is possible to form a river revetment wall that excels in water control effect and natural landscape, and thereby enhances the erosion prevention effect of the revetment. At the same time, a favorable growth environment for living things can be ensured. In addition, by arranging each of the cuboid-shaped stone stuffing baskets with the axis inclined to the downstream side from the direction perpendicular to the water flow, the stone stuffing baskets are stably installed by effectively utilizing the pressing force of the water flow. can do.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a river bank for protection according to the present invention.

FIG. 2 is an enlarged plan view of a main part showing the revetment wall of FIG. 1 for several steps.

FIG. 3 is an enlarged front view of a main part of FIG.

FIG. 4 is a plan view of a main part at the same position as FIG. 2, showing a second embodiment of the river bank for protection according to the present invention.

[Explanation of symbols]

 1A, 1B Revetment wall 2A, 2B Stone basket 3 River 4 Water flow 5 Axis 6 Corner 7 Recess

Claims (4)

[Claims] 1. A plurality of stone-filled baskets having at least one corner portion are juxtaposed along the river with the corner portions protruding toward the center of the river, and a plurality of stacked vertically. A revetment for rivers made of stone baskets, which is characterized by the following. 2. A plurality of rectangular parallelepiped stone baskets are arranged obliquely to a water flow, and are juxtaposed along the river with their corners protruding toward the center of the river. In addition, it is a river bank made of stone squirrel cage, which is characterized by being piled up in multiple layers vertically. 3. The revetment wall according to claim 1,
In at least some of the upper and lower stages, the stone stuffing baskets are arranged so as to be shifted back and forth such that the upper one is located rearward. 4. The revetment wall according to claim 2, wherein each of the stone baskets is arranged with its axis inclined toward the downstream side from the direction perpendicular to the water flow.