JPH1018265A - Stone packed cage revetment wall for river - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve water control effects by setting stone packed cages with stones packed inside in row left and right along the river, dislocating fore-and-aft a front position of the stone packed cages at a portion of the revetment wall lying adjacent to a water stream in a form of a plurality of steps superimposed vertically for placing unevenness on the wall face. SOLUTION: The position of a front face 5 of stone packed cages 2 is dislocated fore-and-aft and a revetment wall 1A is arranged in juxtaposed relation for forming recess portions 6 and projection portions 7 on the wall face. At that time, the uneven portions 6, 7 lying adjacent to a stream of water create a good water control effects such as a deviation of the water flowing direction and a relaxation of a stream of water. In addition, the water stream 4 hits against the projection portions 7 to thereby be in turbulence and also take in and stirring air so that good purifying effects can be obtained. In particular, the water stream 4 hitting against the wall face 7 retains rapid flow and a part thereof comes into an inner portion of the stone packed cages 2 and passes therethrough, thus a relaxation of the flow speed results in decelerating effects. As such, the wall face recess portions 6 lead to be a living area or refuge area for a waterplant and fish, thereby ensuring an excellent environment of a living thing, and performing an effect of nature conservation.

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 rainfall, such as rising water and flooding. For this reason, efforts have been made to build a bank along both sides of the river with concrete, blocks, etc., so as to provide a smooth seawall with few curved and uneven portions that hinder water flow. However, recently, the idea of the preservation and creation of 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 good growth environment of living creatures, it has been placed on preserving or creating beautiful natural scenery. Specifically, avoiding excessively short-circuiting of the curved section of the river, setting the standard cross section for the river width, and avoiding uniform river width,
Based on sufficient consideration of the hydraulic characteristics and the conditions of the hinterland, it was decided to select a construction method that considers the good growth environment of living things and the preservation and creation of natural scenery. And as 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 can 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 a conventional river construction method using stone baskets, a revetment wall formed by arranging a plurality of stone baskets side by side and stacking them along a river is a neat arrangement of the stone baskets. It has a substantially flat wall surface when viewed as a whole, and as a result, there is a water control effect that reduces the flow velocity of water, and the flow velocity that is a survival area or evacuation area for fish and other organisms is moderate. The effect of forming a relatively wide slow-flow depression is lower than expected, especially since only a small gap is formed between stuffed stones, and it is sufficiently wide and safe for a large fish or a growing fish. It was difficult to secure the recess. Also,
Unlike a natural embankment, the revetment was monotonous and was not sufficient in terms of preserving and creating a natural landscape.

[0004]

SUMMARY OF THE INVENTION It is a main object of the present invention to provide a river made of stone-filled baskets which has an excellent water control effect for reducing the flow velocity of water and a natural protection effect for providing a favorable growth environment for living things. To provide revetments. An object of the present invention is to enhance the natural scenery of the revetment wall by changing the wall surface of the revetment wall.

[0005]

According to the present invention, there is provided, in accordance with the present invention, a plurality of stone baskets having stuffed stones therein arranged side by side along a river and a plurality of vertically stacked baskets. Pile, and on the front side of the wall facing the river at least one
By displacing the front surface of some stone stuffing baskets relatively forward and backward with respect to one step, there is provided a river protection wall made of stone stuffing baskets, characterized in that the wall surface is formed unevenly. Further, according to the present invention, a plurality of stone-filled baskets with stuffed stones inside are arranged side by side along the river, and a plurality of stacked vertically.
A stone having a wall surface formed in an uneven shape by installing a part of a stone basket in at least one step at an interval between adjacent ones on a front side of a wall facing a river. A revetment for rivers made of baskets will be provided.

According to the revetment wall having the above structure, on the front side of the wall facing the river, the front of some of the stone baskets is shifted in the front-rear direction, or an interval is provided between some of the stone baskets. Thereby, since the wall surface is formed in irregularities, near the riverbank, the superior water control effect is obtained by changing the direction of water flow or relaxing the water flow due to the unevenness of the wall surface, Not only is the erosion prevention effect of the revetment enhanced, but also a good growth environment for living things is ensured, such as the depressions serving as slow-flowing parts that serve as living areas or evacuation areas. In particular, the water flow that collides with the convexity of the wall surface does not bounce back in the main flow direction while maintaining the fast flow, but partially penetrates and passes through the inside of the stone stuffing basket, during which the flow velocity is sufficient. Since the flow of the mitigated and bounced water is also dispersed by the unevenness of the surface of the stone basket, a deceleration effect works and the flow velocity is alleviated, and a very superior water control effect can be obtained. This effect can not be obtained at all from the provision of irregularities on the concrete revetment wall.

[0007] Further, by forming the wall surface of the revetment wall with irregularities, 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. Furthermore, irregularities can be easily and reliably formed on the wall of the revetment wall by a very simple means of shifting the position of the front surface of some stone baskets in the front-rear direction or providing a gap between some stone baskets. The shape of the unevenness can be set to various types by considering how many positions the stone basket is shifted, how much the position is shifted, and the like.

According to one preferred embodiment of the present invention, the plurality of recesses are connected to each other by a flow path inside the wall. According to a specific configuration aspect of the present invention, at least a part of the wall surface is inclined by positioning the front surface of the upper stone basket in a position retracted from the front surface of the lower stone basket.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment 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 revetment wall 1A is configured so that the wall surface is inclined rearward by the square stone basket 2. The stone-filled basket 2 is formed in a rectangular parallelepiped shape by a net-shaped material such as a rhombus wire mesh, a welded wire mesh, or reinforced plastic, and is filled with stones such as natural stones. Are arranged side by side in the left and right direction along the river 3 in a state where they are directed substantially at right angles to the water flow 4, and are stacked vertically in a plurality of stages. And the revetment wall 1A
A concave portion 6 and a convex portion 7 are formed on the front wall surface facing the river by shifting the position of the front surface 5 of the stone stuffing basket 2 in each step relatively forward and backward by a required distance.

[0010] Each of the above-mentioned stone stuffing baskets 2 is arranged so that the upper one is located directly above the lower one, and in each row, the front of the upper stone stuffing basket 2 is the lower one. Is disposed so as to be retracted by a required distance from the front surface in the axial direction with respect to the front surface of the revetment wall, whereby the revetment wall 1A is provided with a necessary inclination. The optimum range of the distance L for shifting the front face 5 of the stone basket 2 back and forth varies depending on the situation of the place where the revetment wall is installed, the size of the stone basket 2 and the like, but is usually 10 to 10.
Preferably about 100 cm, more preferably 30 to 50
cm. However, it is not limited to these dimensions. In each of the stone baskets 2, vertically and horizontally adjacent ones can be connected to each other by appropriate means.

The revetment wall 1A having the above structure is a stone basin 2
Since the concave portion 6 and the convex portion 7 are formed on the wall surface by shifting the position of the front surface 5 in front and rear, the direction of the water flow is changed by the unevenness on the wall surface portion in contact with the water flow. The water flow 4 is alleviated and the excellent water control effect is obtained, and the water flow 4 collides with the convex portion 7 to be turbulent, and the air is taken in and agitated, so that the excellent purification is achieved. An effect is also obtained. In particular, the projections 7 on the wall surface
The water flow 4 that has collided with is not rebounded in the main flow direction while maintaining the fast flow, but partially penetrates and passes through the inside of the stone basket 2, during which the flow velocity is sufficiently relaxed,
The bounced water flow 4 is also dispersed due to the unevenness of the surface of the stone basket 2 itself, so that the deceleration effect works and the flow velocity is reduced, so that a very superior water control effect can be obtained. This effect can not be obtained at all from the provision of irregularities on the concrete revetment wall.

The recess 6 on the wall forms a bay, albeit small, and the flow velocity is small at that portion, so that a favorable growth environment for living organisms such as a living area or an evacuation area for aquatic plants and fish is secured. It also has a superior nature protection effect. In addition, since the flow velocity is reduced by the diversion, the erosion prevention effect of the revetment will be enhanced. Furthermore, by forming the wall surface of the revetment wall 1A with irregularities, it is possible to obtain a landscape full of natural changes that cannot be obtained from a smooth straight or curved monotonous wall surface. In addition, the revetment wall is generally set to a height that can cope with the largest possible increase in water, so that the upper part of the wall does not come into contact with running water in normal times, so Not only can be suitably used as a place for green vegetation, but also the shade of the concavity serves as a suitable place for growing moss plants, which leads to promotion of river greening and conservation of natural scenery.

In the above embodiment, the position of the front surface of the stone basket in each step is shifted forward and backward every other one, but it may be shifted every two or more pieces, or in this way, one piece Or without shifting the position regularly every two or more,
The position can be shifted at random every appropriate number in accordance with the location, and the distance L for shifting the position can be made different depending on the location. In addition, the positions of the stone baskets may not necessarily be shifted for all the steps, but may be shifted for only some of the steps.

[0014] In short, at least one of the steps located at a height in contact with the water flow, the front position of a part of the stone basket placed side by side in the step is relatively adjusted. What is necessary is just to shift back and forth, and the required unevenness is formed on the wall surface. Further, the stone baskets having the same dimensions are not necessarily installed at different positions in front and rear, and as in the revetment wall 1B of the second embodiment shown in FIG.
At a position where the concave portion 6 is formed, a short stone stuffing basket 2a shorter than the other stone stuffing basket 2 by the depth L of the concave portion 6 may be installed. In this case, each stone basket 2, 2 in that stage
The positions on the back of “a” are aligned.

FIG. 5 shows a third embodiment of the present invention.
In the revetment wall 1C of the third embodiment, at least a part of the recesses 6 is substantially recessed by retreating the front surface 5 of the stone basket 2 to the rear of the front surface 5 of the upper stone basket 2. It is formed in a shape that is depressed from the wall surface.

FIG. 6 and FIG. 7 show a fourth embodiment of the present invention. The revetment wall 1D of the fourth embodiment is such that the revetment wall of the first to third embodiments has the wall surface inclined backward. In contrast, part or all of the front wall is formed substantially vertically,
The recess 6 is formed by retreating at least a part of the front surface 5 of the stone basket 2 in one or more rows or steps from a wall surface at a portion in contact with the water flow.
In this case, portions other than the concave portions 6 are relatively convex portions 7.

The recesses 6 may be arranged regularly or irregularly, and the depth may vary depending on the location. Also, regarding the form of the concave portion 6, only one stone stuffing basket 2 is retracted to be a small concave portion 6a, or a plurality of stone stuffing baskets 2 vertically or horizontally adjacent are retracted to form a large concave portion. 6b. Furthermore, on the back side of the revetment wall 1D, the positions behind the stone baskets 2 may or may not be aligned as illustrated. The operation and effect of the fourth embodiment are substantially the same as those of the first embodiment, but each recess 6 is not stepped like the recess 6 of the first embodiment, but falls off the wall surface. Since it is shaped like a dented hole, it has a better effect as a survival area or evacuation area for fish and the like.

FIG. 8 shows a fifth embodiment of the present invention.
In the revetment wall 1E of the fifth embodiment, a plurality of recesses 6 and 6 are mutually connected by a flow path 8 provided inside the revetment wall. As a result, the survival area or evacuation area for fish and the like is expanded, and a better growth environment is secured. FIG. 9 shows a sixth embodiment of the revetment wall according to the present invention.
Contrary to the fourth embodiment, at least a part of the front surface 5 of the stone basket 2 in one or more rows or steps is projected from the wall surface at least on the wall part in contact with the water flow.
The projection 7 is formed. In this case, portions other than the convex portions 7 become the concave portions 6 relatively. In particular, the concave portion 6 formed in the shaded portion on the downstream side of the convex portion 7 is the most suitable place as a survival area or an evacuation area for fish and the like.

The protrusions 7 may be arranged regularly or irregularly, and the amount of protrusion may vary depending on the location. In addition, as for the form of the convex portion 7, a small-sized convex portion may be formed by projecting only one stone-filled basket 2, or a large-scaled projecting process may be performed by projecting a plurality of stone-filled baskets 2 adjacent vertically or horizontally. It can also be a convex part. The operation and effect of the sixth embodiment are substantially the same as those of the first embodiment, and therefore, will not be described repeatedly.

In each of the above embodiments, the concave and convex portions are formed on the wall surface by shifting the front position of some of the stone baskets back and forth, but at least one of the wall portions in contact with the water flow. With respect to the above steps, a space may be formed in a part by installing a part of a stone basket at a required interval between adjacent stone baskets. In this case, the space portion becomes a concave portion, and the other portions become relatively convex portions. Further, in each embodiment, the upper and lower stone stuffing baskets are stacked so that the upper one is located directly above the lower one, but the upper one is located adjacent to the lower one. It is also possible to stack them so as to straddle one another, and these two forms of stacking may be mixed.

Furthermore, although the illustrated embodiment uses a square stone basket, other shapes, such as a cylindrical stone basket, may be used. Furthermore, it is not always necessary to form a revetment wall using the same shape, the same size, and the same standard of stone basin, and it is natural that the stone basin of different shape, different size, and different standard can be mixed. It is.

[0022]

As described above, according to the present invention, water can be provided by extremely simple means such as shifting the position of the front surface of some stone baskets in the front-rear direction or providing an interval between some stone baskets. To obtain a multi-functional stone-walled quay wall that excels in the water flow effect that alleviates the flow velocity of water, the natural protection effect that provides a good growth environment for organisms such as fish and plants, and also excels in the natural scenery. be able to.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a first embodiment of a river revetment wall according to the present invention.

FIG. 2 is an enlarged perspective view of a main part of FIG.

FIG. 3 is an enlarged plan view of a main portion showing the revetment wall of FIG. 1 for several steps.

FIG. 4 is a plan view of a main portion of one stage showing a second embodiment of a river bank according to the present invention.

FIG. 5 is a side sectional view showing a third embodiment of a river revetment wall according to the present invention.

FIG. 6 is a side sectional view showing a fourth embodiment of a river revetment wall according to the present invention.

FIG. 7 is an enlarged perspective view of a main part of FIG. 6;

FIG. 8 is a plan view of a main part of one step showing a fifth embodiment of a river bank according to the present invention.

FIG. 9 is a perspective view of a relevant part showing a sixth embodiment of a river bank according to the present invention.

[Explanation of symbols]

 1A, 1B, 1C, 1D, 1E, 1F Revetment wall 2, 2a Stone-filled basket 3 River 4 Water flow 5 Front 6, 6a, 6b Concave part 7 Convex part 8 Flow path

Claims (4)

[Claims] 1. A plurality of stone stuffing baskets with stuffed stones inside are arranged side by side along a river and a plurality of tiers are stacked vertically, and at least one step is provided on the front side of a wall facing the river. (1) An embankment wall for a river made of stone-filled baskets, characterized in that the front wall of some of the stone-filled baskets is relatively shifted back and forth to form uneven wall surfaces. 2. A plurality of stone stuffing baskets having stuffed stones therein are arranged side by side along the river and a plurality of tiers are stacked one above the other, and at least one step is provided on the front side of the wall facing the river. (1) An embankment for rivers made of stone baskets, characterized in that the walls are formed unevenly by installing some stone baskets at intervals between adjacent stone baskets. 3. The revetment wall according to claim 1 or 2,
A plurality of recesses connected to each other by a flow path inside a wall. 4. The revetment wall according to claim 1, wherein at least a part of the wall surface is inclined by retreating the front surface of the upper-stage stone basket from the front surface of the lower-stage stone basket. What is being done.