JPH10147923A - Fish bank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the inhabitation environment of aquatic life requiring no large-scale work by burying recessed moldings inhabitable for fishes on the face of slope, the toe of slope, and the top of slope of a revetment, and using the recesses as a fish bank. SOLUTION: This revetment is constructed with riprap mounds 1a, 1b in upper and lower stages, and tubular bodies 4 are buried on the face of slope of the riprap mound 1a on the lower stage and on the toe of slope of the riprap mound 1b on the upper stage as recessed moldings inhabitable for fishes to form an artificial fish bank. For the installation of the tubular bodies 4 on the face of slope of the revetment, the tubular bodies 4 are hoisted and arranged at the installation positions on the riprap mound 1 after the riprap mound 1 is executed to the height of the installation positions of the tubular bodies 4 in the stage of revetment creation, openings 4b are opened on the face of slope, toe of slope, and top of slope of the riprap mound 1, and the tubular bodies 4 are covered with ripraps and cover stones 2 to create the revetment. Stones with coarse surfaces are spread in the tubular bodies 4, and stones are arranged after the tubular bodies 4 are installed on the revetment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing reef provided on a seawall facing the open sea.

[0002]

2. Description of the Related Art As a large-scale revetment facing the open sea, there is a rubble revetment, in which a rubble mound 1 is constructed on a sand layer and a covering stone 2 is laid on this surface as shown in FIG. As shown in the figure, the rubble mound 1 is constructed in two upper and lower stages, the lower rubble mound 1a is formed in a trapezoidal shape, and the upper rubble mound 1b is formed in a mountain shape. Is further provided with a wave-dissipating block (commonly known as tetrapot) 3.

[0003]

In such a rubble revetment, the slope is flat and there is almost no shading.
There is no stagnation, so fish, especially small fish, small fish, shrimp, and crabs, are difficult to approach and are not a suitable place for these organisms to live.

Further, in places where the wave-dissipating function such as the wave-dissipating block 3 exists, it is difficult for fish to inhabit due to eddies, bubbles, turbulence and the like generated by the wave-dissipating function.

[0005] An object of the present invention is to solve the disadvantages of the above-mentioned conventional example, and to enable the inhabitation of fish and the like even on the rubble revetment having the above-mentioned structure, and to provide a habitat environment for aquatic organisms. Extensive construction involves providing unnecessary fishing reefs.

[0006]

In order to achieve the above object, the present invention embeds a recess forming body on which a fish or the like can inhabit on a slope of a revetment, a tip or a shoulder, and artificially forms the recess. The reef shall be a reef, and the recessed body shall be a tubular body with one end closed, and the other open end shall be open to the slope of the revetment and the tip or shoulder, where the cylindrical space Or the recess forming body is a flat, substantially wedge-shaped frame formed with an opening at the tip, and the opening is located on the slope of the slope of the revetment to form a substantially wedge-shaped depression on the slope. It is intended to form.

According to the first aspect of the present invention, a recess forming body capable of inhabiting fish and the like is buried on the slope of the revetment, the forehead and the shoulder, and the recess is formed as an artificial reef. In addition, fishing reefs can be formed on the slopes of the revetment, which are flat and have no shade, allowing fish to inhabit and improve the environment. And the formation of the reef is simple because only the recessed body is buried.

According to the second aspect of the present invention, in addition to the above-mentioned functions, a tubular body as a recess forming body is buried in the revetment, and the opening end thereof is formed on the slope, the tip and the shoulder. If this is done, the internal space of the tubular body becomes a shaded area and a stagnation area not affected by the water current, and a fishing reef can be formed here.

According to the third aspect of the present invention, in addition to the above-described operation, a flat, substantially wedge-shaped frame-like body having a recess-forming body formed with an opening at the tip is buried in the revetment, and is substantially formed on the slope. By forming a wedge-shaped depression, this depression becomes a shade portion and a stagnation portion which is not affected by the water flow, and a fishing reef can be formed here.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of a fishing reef of the present invention, and FIG. 2 is a cross-sectional view of the same, and the entire configuration of the revetment has already been described with reference to FIG.

In the first embodiment of the present invention, on a revetment in which rubble mounds 1a and 1b are constructed in two upper and lower steps, fish and the like are placed on the slope of the lower rubble mound 1a and the tip of the upper rubble mound 1b. As a recess forming body that can inhabit
The tubular body 4 is buried, and the tubular body 4 is used as an artificial reef.

The tubular body 4 is a commercially available steel pipe, corrugated pipe, prestressed concrete pipe, or the like as shown in FIGS.
It is composed of a cylindrical body such as a RC (reinforced concrete) tube or a box culvert type rectangular cylindrical body as shown in FIG. 5, one end of which is closed with a lid 4a made of concrete or the like.
The other end is an opening 4b.

As shown in FIG. 3 and FIG. 5, two or three concrete-type large-diameter concrete-type ones are connected in the longitudinal direction. In this case, the cylindrical body uses a socket 5 as a connecting member, which is wrapped with a steel plate 6 to reinforce it, a lifting hand 7 is provided at the upper part for lifting during transportation or installation, and a lowering prevention fitting 8 is provided at the lower part.
Was provided.

In the case of a rectangular tube, as shown in FIG. 5, they are joined by a joint steel plate 9 as a connecting member, and a plurality of hanging hands 7 are provided at an appropriate interval on the upper part.

In the case of the cylindrical body 4 having a large diameter, the cylindrical body 4 is used alone. In this case, as shown in FIG. 4, a steel plate band 10 is wound around the band 10 and a hanging hand 7 and a fall prevention metal fitting 8 are attached thereto. However, when a steel pipe is used, the steel plate band 10 is omitted, and the suspender 7 and the fall prevention fitting 8 are directly welded and attached.

In order to install these tubular bodies 4 on the slopes of the revetment, the rubble mound 1 is constructed up to the height of the installation position of the tubular bodies 4 at the stage of forming the revetment. The cylindrical body 4 is hung by using the hanger 7 and disposed at the installation location of the rubble mound 1. In this case, the opening 4
The b side is opened at the tip or shoulder of the slope of the rubble mound 1, and the rubble is covered with a rubble, a covering stone 2 or the like to form a seawall.

Before the installation on the revetment, the inside of the cylindrical body 4 should be covered with stones as rough as possible on land or by spraying coarse sand with a synthetic resin such as epoxy. Or, place stones on the seawall after setting them up to create an environment where living things can easily live.

In this way, the tubular body 4 is buried in a state where the opening 4b faces the slope of the seawall, the tip and the shoulder, and the internal space becomes an artificial reef.

FIG. 6 to FIG. 9 show a second embodiment, in which a substantially wedge-shaped frame-like body 11 is buried as a recess forming body in which fish and the like can inhabit at the shoulder position of the lower rubble mound 1a. The planar substantially wedge-shaped frame 11 is used as an artificial reef.

As shown in FIGS. 8 and 9, the frame-like body 11 having a substantially planar wedge shape is formed with a narrow opening 11a by cutting off the tip of the wedge shape, and the space becomes wider in a divergent manner as it goes deeper into the interior.
11b is formed into a substantially C-shaped substantially wedge-shaped frame and is made of reinforced concrete or prestressed concrete.

As a method of installing such a flat frame-like frame 11 on the slope of the revetment slope, when the frame 11 is relatively small, the rubble mound 1 of reinforced concrete or prestressed concrete on land is used. It is made into a block that conforms to the shape of the shoulder. In this case, the opening 11a
This part is chamfered so that the tip on the side of the corner matches the angle of inclination of the sloping mound of the rubble mound.

In this way, when the rubble mound 1 is constructed to the height of the installation position of the frame 11 at the stage of forming the revetment, the substantially wedge-shaped frame 11 manufactured in advance on land is set at the installation location. In this case, the side of the opening 11a is opened to the shoulder of the slope of the rubble mound 1, and the surrounding area is covered with rubble, covering stone 2 or the like so as not to cover the upper part of the space 11b to form a seawall.

As a result, the frame 11 is buried at the slope of the slope of the rubble mound 1, and the opening 11a and the space 11b are opened in the water, thereby forming an artificial fishing reef. And the space 11b is the opening 11
Because it is formed wider from the part a to the back,
The inside is hardly affected by waves and water currents, and it becomes a place where fish, shrimp, crabs, etc. approach, as well as stagnation and shading.

As a method of installing the substantially frame-shaped frame 11 having a substantially flat wedge shape on the slope of the revetment slope, when the frame 11 is relatively large, the weight increases, so that the construction is performed on site. First, as shown in FIG. 9, a steel wedge-shaped steel frame 12 is assembled on land.
This is covered with a side wall 13 and a bottom plate 14 made of cloth, a wooden board, a steel plate, or the like. If not, lay it down without stuffing and stuff it on site.

At the stage of revetment construction, rubble mound 1
Was constructed up to the height of the installation position of the frame 11,
It is sunk at the installation position, and concrete is poured into the basket frame 12 at the site. As a method of placing concrete, a pipe is inserted into a discarded stone packed in a basket frame 12 in a basket frame 12, and concrete is poured using this pipe. There is a method of pouring directly into the inside.

In this way, a wedge-shaped concrete block is formed in the basket frame 12 in which the stuffed stones 15 are solidified with concrete, and then the surrounding area is discarded so as not to cover the upper part of the space 11b. And revetment to create a seawall.

[0027]

As described above, the fishing reef of the present invention enables the inhabitation of fish and the like even on a rubble-walled revetment having a large scale, a flat slope, almost no shading, and no stagnation. In addition, it is possible to prepare a habitat for aquatic organisms, and for that purpose, large-scale construction is unnecessary and can be easily artificially formed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a fishing reef of the present invention.

FIG. 2 is a cross-sectional view showing a first embodiment of the fishing reef of the present invention.

FIG. 3 is a perspective view showing a first example of a tubular body that is a main part of the first embodiment of the fishing reef of the present invention.

FIG. 4 is a perspective view showing a second example of the tubular body which is a main part of the first embodiment of the fishing reef of the present invention.

FIG. 5 is a perspective view showing a third example of a tubular body that is a main part of the first embodiment of the fishing reef of the present invention.

FIG. 6 is a perspective view showing a second embodiment of the fishing reef of the present invention.

FIG. 7 is a cross-sectional view showing a second embodiment of the fishing reef of the present invention.

FIG. 8 is a perspective view showing a first example of a frame-shaped body that is a main part of a second embodiment of the fishing reef of the present invention.

FIG. 9 is a perspective view showing a second example of the frame-shaped body which is a main part of the second embodiment of the fishing reef of the present invention.

[Explanation of symbols]

 1, 1a, 1b ... rubble mound 2 ... covering stone 3 ... wave-dissipating block 4 ... cylindrical body 4a ... lid 4b ... opening 5 ... socket 6 ... steel plate 7 ... hanging hand 8 ... fall prevention fitting 9 ... joint steel plate 10 ... steel plate Band 11 ... Frame 11a ... Opening 11b ... Space 12 ... Basket frame 13 ... Side wall 14 ... Bottom plate 15 ... Stone packing

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeru Hirashima Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo

Claims (3)

[Claims] 1. A fishing reef characterized by embedding a recess forming body capable of inhabiting fish and the like on a slope of a revetment, a forehead and a shoulder, and making the recess an artificial reef. 2. The recess forming body is a tubular body having one end closed, and the other open end is opened at a slope of a revetment, a slope or a slope, and a cylindrical space is formed therein. The reef according to claim 1, 3. The recess forming body is a flat, substantially wedge-shaped frame having a front end formed in an opening, and the opening is positioned on a slope of a slope of the revetment to form a substantially wedge-shaped depression in the slope. The reef according to claim 1.