JP2829493B2 - River revetment structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seawall structure made of steel sheet pile or concrete, which can provide a place suitable for resting, evacuating, or nesting fish and vegetation, etc. is there.

[0002]

2. Description of the Related Art As a bank protection structure for a river, a structure constructed of steel sheet pile or concrete is known. These revetment structures generally have a slightly uneven wall surface, but are generally flat. For this reason, there is little in the water near the revetment or near the shore, where there is almost no pool that plays an important role as a rest area for fish or as an evacuation site during floods, and a barrier that plays a barrier role. It is unsuitable for vegetation and vegetation has been lost.

[0003] It is important to have a place where fish and the like inhabit and vegetation have a gentle flow velocity, such as a current or a deep pool. Due to the loss of such places, rivers simply function as channels for water, and the natural environment is impaired.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a vegetation where reeds and other reeds can be obtained by forming places where the flow velocity has changed, such as rivers and flutes, on a seawall made of steel sheet piles or the like. It is an object of the present invention to provide a seawall structure that can improve the environment by the above and create an environment suitable for the inhabitation of living organisms such as fish.

[0005]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. The structure of claim 1 is constituted by a steel sheet pile 1 or the like. A vegetation box C provided with a vegetation mat 6 is provided at the lower end on the inner side of the enclosing plate 2 formed by bending into an L-shape on the river-side wall surface of the provided revetment wall A. is there.

According to a second aspect of the present invention, in the structure of the first aspect, an extension baffle plate 16 is provided at a lower end of the vegetation box C so as to extend in a direction crossing the water flow. It is.

[0007] The structure of claim 3 is characterized in that, in the structure of claim 1, an extension enclosing plate 17 formed in the same manner as the enclosing plate 2 is provided at the lower end of the vegetation box C. is there.

[0008]

According to the present invention, the vegetation box C protrudes from the revetment wall and the vegetation mat 6 is provided inside the vegetation box C. Therefore, in the vegetation box C and on the downstream side thereof, the region X with the reduced flow velocity is provided.
Is created, providing a suitable place for resting fish and evacuation during floods. Also, by planting the plant 10 on the vegetation mat 6, the spawning of fish and the like, the attachment of bacteria and the like, and the breeding of the vegetation mat 6 progress, the breeding of organisms, the improvement of the natural environment, and the purification of rivers are achieved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view illustrating a revetment structure formed by connecting steel sheet piles in succession, FIG.
Is a river.

The revetment wall A is formed by connecting a large number of commonly used U-shaped steel sheet piles 1 with joints provided at both ends thereof, and connecting the lower part thereof to the ground. It is erected. Although not shown, the revetment wall A can be reinforced by connecting a steel material extending in the longitudinal direction of the revetment wall A, or an anchor material can be provided on the ground side, as is conventionally known.

Of the many steel sheet piles 1, 1 constituting the revetment wall B, the required steel sheet pile 1 traveling on the river B side uses the table surface portion 3 on which the business trip has been made, and uses the underwater or water edge. A vegetation box C is provided at each location. The required number of the vegetation boxes C is provided at appropriate intervals in the length direction and the vertical direction of the revetment wall B.

[0012] The vegetation box C is composed of the base 1a of the steel sheet pile 1.
From a baffle plate 3 protruding in a direction crossing the water flow and a shielding plate 4 extending from the end thereof in a direction along the water flow. A vegetation in which a vegetation soil 7 is wrapped with a coarse sponge 8, for example, is fixed on a support plate 5 formed of a substantially square frame plate or a perforated plate (grating, mesh plate, expanded metal, or the like). It has a structure with a mat 6 attached. The vegetation box C is attached by fixing the outer edge of the baffle plate portion 3 to the steel sheet pile 1 by welding or the like. As shown in FIG. 1, plants 10 such as reeds and reeds are planted on the vegetation mat 6 as appropriate.

By mounting the vegetation box C, a gentle flow zone X having a flow velocity lower than the flow velocity of the river is created in the vegetation box C and on the downstream side thereof. According to the experiment, when the flow velocity V _{1 of} the river is 145 cm / s, the size of the baffle plate 3 is 50 cm.
When fitted with a vegetation box C which is an angular, downstream of the vegetation box C is observed that the length L of the loose basin X of the flow velocity V ₂ of about one-half of the flow velocity V ₁ is ranging from about 250cm It has been found that a gentle flow zone X corresponding to the conventional stagnation and edge is created in a considerably wide range.

If the revetment is made of a series of U-shaped steel sheet piles 1 as shown in FIG.
Since the recess x is formed by the steel sheet pile 1 connected to the steel sheet pile 1 on which the baffle 4 is protruded, the gentle flow area X has a deeper portion, so that a larger area can be formed.

The slow basin X formed by the vegetation box C
Is a habitat for fish, etc., a place of rest, or an evacuation site in the event of a flood. Moreover, the planted plant grows well in the gentle basin, and the root of the plant also extends below the vegetation mat 6. Small fish and other organisms lay eggs on the leaves and stems of the plant, and the growth is promoted by maintaining a moderately reduced flow rate. In addition, bacteria and the like adhere to and propagate on the roots of the plant, thereby purifying the river, thereby helping to improve the water quality of the river. In addition, just below the vegetation box C, the roots of the plant protrude. Since a gentle basin is formed, the effect as a fish nest is promoted.

The attachment of the vegetation box C to the steel sheet pile 1 is as follows.
As shown in FIG. 4, angle members 11, 11 are previously formed on the steel sheet pile 1 to form engaging grooves 12, and the vegetation box C has the base end of the baffle plate 3. A plate 13 for engagement may be provided on the boss, and the plate 13 may be inserted into the engagement groove 8 and attached. In this case, the lower end of the engagement groove 8 needs to be closed. When the revetment wall A is made of concrete, as shown in FIG. 5, a wide mounting plate 14 is provided at the base end of the baffle plate 3, and is fixed by the anchor bolts 15, 15 through the mounting plate 14. Is good.

FIG. 6 shows another embodiment of the present invention. In this embodiment, the baffle plate 3 of the vegetation box C is used.
An extension baffle plate 16 extending downward is provided at the lower end position. In this way, a gentle basin is created below the vegetation box C, and the vegetation box C
The habitat below will be better.

FIG. 7 shows still another embodiment of the present invention. In this embodiment, the vegetation box C
On the lower side, an extended enclosing plate 17 formed similarly to the enclosing plate 2
Is hanging and attached. In this configuration, the same thing as the vegetation box C is formed below the vegetation mat 6, and a gentle flow area similar to that provided with the vegetation box C is created. Is obtained.

[0019]

As described above, according to the structure of the first aspect, the vegetation box is protruded from the revetment wall, so that the flow velocity in the vegetation box and on the downstream side thereof is moderated over a considerable range. , A gentle basin corresponding to stagnation and abyss is created locally, and the habitat of fish, etc., a place of refuge at the time of a break or a flood are secured, and vegetation promotes the breeding of living things, improving the natural environment and improving the river. Purification can be achieved.

Further, according to the revetment structure of the second aspect, in addition to the above effects, a gentle flow area is formed below the vegetation box, and the area where creatures grow is expanded.

Further, according to the revetment structure of the third aspect, it is possible to secure a larger breeding environment for the creature than that of the second aspect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view showing the main part.

FIG. 3 is a sectional view taken along the line II in FIG. 2;

FIG. 4 is a perspective view showing another attachment example of the vegetation box.

FIG. 5 is a perspective view showing still another attachment example.

FIG. 6 is a perspective view showing another embodiment of the present invention.

FIG. 7 is a perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

 A Revetment wall B River C Vegetation box 1 Steel sheet pile 2 Enclosure board 3 Disturbing plate part 4 Shielding plate part 5 Support plate 6 Vegetation mat 7 Vegetation soil 8 Sponge 10 Plant 15 Mounting plate 16 Extension disturbing plate 17 Extended distributing plate

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000002118 Sumitomo Metal Industries, Ltd. 4-33, Kitahama, Chuo-ku, Osaka-shi, Osaka (73) Patent holder 000004123 Nippon Kokan Co., Ltd. 1-Chome, Marunouchi, Chiyoda-ku, Tokyo 1-2-2 (72) Inventor: Shoichi Torizaki 1-6-4, Taito, Taito-ku, Tokyo Inside the Civil Engineering Research Center (72) Inventor: Masaki Shinohara 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Kawasaki Steel Tokyo Incorporated (72) Inventor Kenji Noboru 4 Takatani Shinmachi, Ichikawa-shi, Chiba Prefecture Inside Kubota Ichikawa Plant (72) Inventor Yutaka Sakata 2-6-1 Otemachi, Chiyoda-ku, Tokyo Nippon Steel Corporation In-company (72) Inventor Hisao Iida 4-5-33 Kitahama, Chuo-ku, Osaka City Inside Sumitomo Metal Industries, Ltd. (72) Inventor Masahiko Katsutani Sento Tokyo 1-2-1 Marunouchi, Ta-ku Nippon Kokan Co., Ltd. (56) References JP-A-3-286011 (JP, A) JP-A 8-81936 (JP, A) JP-A-4-22510 (JP, A) U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E02B 3/12 E02B 3/06

Claims (3)

(57) [Claims] 1. A vegetation box having a vegetation mat provided at an inner lower end of an L-shaped bend formed on a river-side wall of a revetment wall erected by a steel sheet pile or the like. River revetment structure characterized by the following. 2. The river bank protection structure according to claim 1, wherein an extension baffle plate is provided at a lower end of the vegetation box so as to extend in a direction crossing the water flow. 3. The revetment structure of a river according to claim 1, wherein an extension surrounding plate formed in the same manner as the surrounding plate is attached to a lower end of the vegetation box.