JP4195360B2 - Fish nest futon bowl and its installation method - Google Patents

Description

  The present invention relates to an improvement of a fish nest Futon basin that forms a cave as a refuge or protection breeding place for fish, particularly large fish, in the front of the revetment or in a flowing water area.

  Conventionally, as a type of revetment or negotiating method, a Futon dredging method has been carried out in which a Futon bran filled with chestnut stone is laminated inside a rectangular parallelepiped wire mesh or bamboo fence. Unlike concrete retaining walls, futon masonry has clearance between chestnut stones, so it has excellent water permeability, deformability, and erosion resistance, and is a residence or hideout for small aquatic animals such as small fish and shrimp. It can be said to be an environmentally friendly method because it is easy. However, because the gap is small, it should not be a residence or a hideout for large fish (10 cm or more in length) such as salmon, salmon, haya, and adult salmon. Will be washed away. Moreover, since there is a lack of spawning place, there is a problem that the next generation is difficult to grow. In particular, when appreciating fish such as Nishikigoi are released and fed as part of local wake-ups, it is a painful issue for the parties that must be replenished every flood.

  From this point of view, several techniques for forming a space for large fish to enter Futon Pass have been proposed. For example, a combination of stone-filled futon reeds filled with clogging stones inside and hollow futon reeds not filled with clogged stones and hybrid futon reeds with stone-filled parts and space inside are combined to form a fishway in the river. Revetment retaining frame (Japanese Patent Laid-Open No. 11-36263), box made up of a thing (Japanese Patent Laid-Open No. 5-339920), a saddle-shaped earth retaining frame main body, a passage frame, and filling stones filled therebetween There is a mesh structure (Japanese Patent Laid-Open No. 11-140846) in which a cylindrical mesh mesh is incorporated in the interior of a mesh mesh mesh body and a space between them is filled with crushed stone or natural stone.

Japanese Patent Laid-Open No. 5-339920 JP-A-11-36263 JP-A-11-140846

  Among these prior arts, the invention described in JP-A-5-339920 forms a large space for making a fishway and is not related to the present invention. On the other hand, the inventions described in JP-A-11-36263 and JP-A-11-140846 are similar to the present invention in that a frame for a passage is formed inside a bowl-shaped or box-shaped frame (net) body. (Cylindrical net cage) is filled, and the space between them is filled with medium cobble stones (spars and natural stones), and the passage frame and the cylindrical net cage portion are used for fish evacuation and protection It is what.

  Among them, in Japanese Patent Application Laid-Open No. 11-36263, in the case of a tube body or a net body (passage frame body) with a part of the periphery open, it is used with the opening side facing down, that is, at the bottom of the frame body. Disclosed for use in position. However, when such a retaining frame is installed on a root or a riverbed, there is a drawback that the passage provided at the corner is filled with mud and does not become a place for fish retreat or protection and cultivation.

  On the other hand, in the same publication, in the case of a tube body or a tubular net body whose entire periphery is closed, there is no description of the position where the frame body is incorporated into the frame body and how to pack the filling stone. Similarly, in the case of Japanese Patent Application Laid-Open No. 11-140846, there is no description of the position where the cylindrical mesh cage is incorporated into the mesh cage body, how to pack the medium packing stone, etc. (in the figure, it is incorporated at the bottom). But). However, in the case of tubular / cylindrical pipes and nets, it is difficult to pack the packing stones, especially from the bottom, and if the packing is bad, the balance will be lost and the overall balance will deteriorate. There is a risk of damaging the net. In the case of a tubular body, the water flow is stagnant and the growth of fish is bad. Moreover, when it is incorporated in the lowermost portion as shown in the figure, there is a drawback that the passage is buried with mud and does not become a place for fish evacuation or protection and cultivation. Therefore, as far as the present inventors know, a Futon bag incorporating such a pipe body or net body inside is not used.

  Therefore, as a result of diligent research, the present inventors have come up with the idea that the cylindrical or elliptical cylinder body incorporated in the Futon basin is supported by a stone product having an arcuate surface to complete the present invention. is there. As a result, the cage body is stable and does not break. Further, the cage body can be positioned inside the futon basin, preferably around the center in the vertical direction without contacting the bottom surface of the futon basin, and the above-mentioned problem of blockage due to mud is also avoided. Here, a stone product having an arc surface is a plate-like body having a concave arc, a fan-shaped side, or an inner side, such as a remaining end material obtained by hollowing out a cylindrical body from a flat stone material in stone processing or a split piece thereof. The plate-like body itself that is hollowed out in a cylindrical shape.

  Moreover, stone products having a concave arc surface are produced in a considerably large amount as industrial waste, so if such an effective use can be made, it is two birds with one stone. In other words, many stone products such as lanterns and tombstones are actively produced in the production areas of visiting stones, granite stones and other domestic stones. There are enormous amounts of dust, failure, and bad stone. At present, all of these must be disposed of as industrial waste, and a large burden is placed on the stone processing company, such as securing a disposal site and labor for transportation.

  There are quite a few of these scraps and failures that have a concave arc surface. This is to cut out a lantern firebag, small lantern or other figurine with a diameter of about 10 to 40 cm from a flat stone with a cylindrical cutter, depending on the size of the flat stone. Cylindrical stone can be easily obtained. Therefore, there is an advantage that the processing cost is lower than the machining from the column material. And the remainder becomes an end material having a concave arc surface, but this end material is quite high in volume, and the volume of waste increases accordingly. By carrying out the present invention, the amount of stone scraps having concave arcuate surfaces is reduced. In addition, stone edge materials that do not have a concave arc surface can be filled in the remaining space inside Futon as a filling stone material, which reduces industrial waste and eliminates the need to procure crushed stones. Cost reduction.

  If there are not enough stone edges with concave arcuate surfaces, they can be made actively. In the case of visiting stones, a large amount of rough stones are produced that cannot be made into products due to soil mixing or rough eyes. If these are used, it will be an effective use of the rough stones that are left or discarded.

  Note that the cage body can be surrounded not only by the lower surface but also by the stone end material having a concave arc surface around the entire periphery thereof. Further, a plate-like body whose inner side is hollowed out into a cylindrical shape can be fitted and supported in the cage body. As a result, the stability of the cage body increases in the Futon basin, and the concealability of the cage body increases, giving the fish a sense of security. In addition, since the basket body is stabilized, operations such as subsequent packing of stone products can be performed quickly and reliably. Furthermore, since the basket body is supported by the stone product from the lower side, as a result, it is located inside the futon wall bottom surface. And the dimension which inserts and supports a plate-shaped stone material etc. under the concave circular arc surface stone end material can be adjusted, and it can also fix to the up-down direction center part or its vicinity position of a futon ridge. In this way, a well-balanced fish nest Futon salmon can be obtained. However, even if the lower surface of the cage body is supported by a stone product having a concave arc surface, it is not necessary to support the lower surface over the entire surface, and it is sufficient if it is supported at an appropriate interval. Then, a triangular stone product or the like may be inserted in a place where there is no concave arc surface stone product. In addition, since the cage body is built in a high position such as the center of Futon Pass, even if it is installed in the mud sediment area or riverbed, mud mud entry is suppressed inside the cage body that will be a cave and will not be blocked. . Of course, the fish nest Futon basin of the present invention can naturally be used not only on mud, but also on places where mud does not enter, such as on abandoned stones or root consolidation blocks.

  By the way, in the case of Futon reeds used for revetment and stubbornness, from the viewpoint of ensuring quality and safety, using a wire mesh that has been meshed to about 13 cm x 20 cm using a 4 mmφ hot-dip galvanized iron wire, It is decided to make it 0.6m, width (depth) 1.2m, length 2m or more (Ministry of Land, Infrastructure, Transport and Tourism standard). Standard products are said to last 10 years or more. Each side of Futon is made up of edged wire mesh reinforced with 8mmφ hot-dip galvanized reinforcing bars. By assembling each of them, the assembly of the Futon bag is completed. Assembly is performed at the installation site. Therefore, dam the river and assemble it where it is immersed in water.

  The fish nest futon bowl of the present invention also conforms to this size and structure. Next, a description will be given of the basket body to be incorporated in the fish nest Futon bowl. As the cage body, a spiral reinforcing bar in which a reinforcing bar with a diameter of 8 mmφ or more is bent spirally, a cage reinforcing bar in which several reinforcing bars are welded around the spiral reinforcing bar, or a plurality of ring-shaped reinforcing bars instead of a spiral For example, a cage rebar in which several rebars are welded, or a mesh rod with several rebars welded around a thin ring-shaped steel plate and covered with a metal mesh. From the viewpoint of ease of processing and strength, a cage reinforcing bar using a helical reinforcing bar is preferable. The shape is preferably cylindrical due to pressure resistance, but may be a somewhat flat elliptical cylinder.

  The diameter of the cage is about 15 to 35 cm. If it is smaller than 15 cm, large fish cannot enter and exit, and if it is larger than 35 cm, the height of the Futon salmon is 40-60 cm. Absent. More preferably, it is about 20-30 cm. The length of the cage body is such that both ends thereof are in contact with both side surfaces and front and rear surfaces of the futon bowl.

  Incorporation of the basket body inside the Futon bag is performed as follows. First, the edged metal mesh of each surface is connected in a developed form, a cage body is arranged on the bottom metal mesh, and the lower surface thereof is supported by the stone product having the concave arc surface. If the height of the cage body from the bottom wire mesh is 10 to 20 cm, preferably about 12.5 to 15 cm, the cage body is almost in the thickness (up and down) direction depending on the thickness of the Futon ridge and the diameter of the basket body. Come to the center. At this time, a space for filling a stone product of about 10 to 20 cm is formed above the cage body. The basket body is incorporated in either the width direction or the length direction of the futon bowl. The number of baskets to be incorporated can be about 1 to 2 in the length direction, and about 1 to 2 per 1 m of Futon basket length in the width direction.

  Next, the metal mesh with the edges on both sides and front and rear sides is assembled in a box shape, and the remaining space inside the Futon ridge is filled with a packing material such as a stone end material. In this case, if the upper surface or upper side surface of the cage body is wrapped with a concave arc surface stone end material or a triangular stone end material, the degree of concealment inside the cage body increases. As the stuffing stone material, when the stone edge material is used, the surface is rough, so that moss and aquatic plants are prone to flourish. This tendency is particularly strong in the case of visiting stones. Also, stone scrap is expensive to dispose of and saves money. However, the crushing stone material is not limited to this, and chestnut stone can also be used. Finally, the fishnet Futon bream is completed by connecting the wire mesh with the top edge respectively.

  The both ends of the cage body are connected and fixed to a wire mesh before and after the filling of the filling material into the remaining space. In the case of an opening, a part of the cut wire mesh may be used for this connection. In general, the futon bowl is assembled at the installation site, but in the case of the fish nest futon bowl of the present invention with both ends open, it can be moved by inserting an iron bar etc. into the cage body and lifting it up, It can be done by moving to the installation place after assembling on a good riverbank. If only one end is open, this method cannot be taken. In addition, a stone product is stuffed and closed on the end portion side that is not opened.

Next, the installation method of the fish nest futon bowl of this invention is demonstrated. Futon Pass is recognized as a river structure element such as revetment and Negoshi. In that case, a weight of about 1.8 tons per 1 m ³ is required. It is based on the knowledge that lighter than this cannot endure the water flow during floods. However, in the case of the fish nest Futon salmon of the present invention, since the inside of the cage body is empty, it becomes only about 1.5 tons. Therefore, it cannot be used for river structures at present.

  Therefore, apart from revetment blocks, futon ridges, snake cages, or gange futon ridges, which are river structures, there is no other way but to install them in the sedimentation area or flowing water area (river bottom) on or before the root consolidation. . Or, if allowed, it can be considered to make a deepened Futon ridge in two steps and install it underneath. Therefore, the configuration of the present invention in which mud does not enter the cage body is important. If the fish nest is to be used as a place of inhabited fish, it will always be installed where the cage body will be submerged. In the place where the basket body is submerged. The installation is performed so that the opening of the cage body faces a direction (preferably orthogonal) intersecting the flow of water. In other words, when the basket body is incorporated in the length direction of the Futon pass, the longer side of the Futon pass is installed toward the center of the river, and when the cage body is installed in the width (depth) direction of the Futon pass, the length of the Futon pass is short. Install towards the center of the river.

  As described above in detail, the fish nest Futon shark according to the present invention is incorporated into a cylindrical or elliptical cylindrical cage body so as to penetrate the Futon shark in the horizontal or vertical direction, and a concave arc is formed from the lower surface of the cage body. It is supported by a stone product having a surface, and a filling space such as a stone material is filled in the remaining space inside the Futon ridge.

Therefore, in addition to the effect that the present invention provides a large cave which is installed in a revetment, in front of root consolidation or in a flowing water area, and serves as a large fish dwelling place or evacuation site, the present invention has a unique excellent effect as described below.
(1) Since the basket body incorporated in the Futon ridge is supported by a stone product having a concave arc surface on the lower side, the cage body is stable and does not break. Therefore, it is possible to assemble the fish nest Futon bowl quickly and surely. Moreover, since the cage body is supported at a position higher than the bottom surface of the futon wall, it is not blocked by mud.
(2) By enveloping at least the upper surface and upper side of the entire circumference of the cage body with a concave arcuate stone product or a triangular stone product, the degree of concealment inside the cage body is increased and the fish is given a sense of security.
(3) The use of stone mills makes the moss and aquatic plants prosperous because the surface is rough. This tendency is particularly strong in the case of visiting stones.
(4) Stone end materials, including stone products having a concave arc surface, are industrial wastes, and it is extremely useful in industry to effectively use them as clogging materials for futon sardines.
(5) By actively manufacturing a stone product having a concave arc surface from a defective raw stone, it is possible to effectively use the raw stone that is left or discarded.
(6) Since industrial waste is used, there is an advantage that it can be obtained at a very low cost.

  Inside the rectangular parallelepiped futon trough, a cage rebar penetrating in the length direction is arranged, and the cage rebar is supported by a stone article having a concave arc surface on the lower side, and the both ends of the cage rebar are opened and large fish Use as an entrance.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an example of a fish nest futon bowl of the present invention. This fish nest futon rod 1 has a cylindrical cage reinforcing bar 3 inside a rectangular parallelepiped futon rod 2 composed of a metal mesh with edges 2a, left side 2b, right side 2c, front surface 2d, rear surface 2e and upper surface 2f. Are arranged, and stone products 4 are packed around them. The lower side surface of the basket reinforcing bar 3 on the front side is mainly supported by a stone end material 4a having a concave arc surface and a triangular stone end material 4b. Further, a flat stone edge 4c and a square stone edge 4d are placed below the stone edges 4a and 4b in order to increase the height of the cage rebar 3. The other cage rebar 3 is supported by fitting a plate-like body 4e whose inner portion is hollowed into a cylindrical shape at the end portion. The fish nest futon bowl 1 has a length of 2 m, a width (depth) of 1.2 m, a height of 60 cm, and a diameter of the cage rebar 3 of 25 cm. Further, the size of the upper and lower stone product layers of the cage rebar 3 is 17.5 cm each.

  The method of making the fish nest futon bowl 1 is as follows. First, the metal mesh with rims connected in advance is developed, and the height of the flat reinforcing bar 4c on the bottom metal mesh 2a is set with the flat stone edge 4c. The cage rebar 3 is arranged and the lower surface thereof is supported by a stone end material 4a having a concave arc surface and a triangular stone end material 4b. Next, the side metal meshes 2b and 2c and the front and rear metal meshes 2d and 2e are connected in a box shape, and fit into the remaining residual space of the cage rebar 3 inside the futon cage 2 and filled with various shapes of stone ends. In this case, a concave arc face stone end material 4a and a triangular stone end material 4b are arranged as much as possible on the upper surface and upper side surface of the cage reinforcing bar 3.

  Next, the upper surface metal mesh 2f is connected to the both side surface metal meshes 2b and 2c and the front and rear surface metal meshes 2d and 2e. Finally, the galvanized iron wires 5 at both side metal meshes 2b and 2c where the both ends 3a and 3b of the cage rebar 3 are in contact are cut out and connected and fixed to the cage rebar 3 although illustration is omitted. This completes the fish nest Futon salmon 1 having two openings 6 at both ends. The fish nest futon bowl 1 can be lifted by inserting an iron bar into the cage rebar 3 and moved to a predetermined location. When the opening 6 is only one end, the opposite side is filled with a stone product and closed.

  FIG. 2 is a perspective view showing an example of the cage rebar 3. The cage reinforcing bar 3 is obtained by welding four reinforcing bars 32 having the same thickness around a helical reinforcing bar 31 obtained by bending a reinforcing bar having a thickness of 8 mmφ. The distance between the spirals is about 13 cm. In addition, the cage rebar 3 was subjected to a zinc soaking treatment.

  FIG. 3 shows an example of a construction diagram of the fish nest Futon shark 1. The fish nest Futon ridge 1 is installed not in the part of the revetment block 11 and the concrete root consolidation 12 which are the river structures 10, but in front of the root consolidation 12, with the length direction facing the river flow. On the upper stage of the fish nest futon bowl 1, a conventional futon bowl 13 is placed as a presser. Since the water surface WL is above the fish nest Futon Pass 1, the cave (Uro) 7 made of the cage rebar 3 is always open to the water, and serves as a habitat for large fish, an evacuation place, and a breeding place. Similarly, the fish nest Futon shark 1 installed on the riverbed 14 is also a habitat for large fishes, an evacuation place, and a breeding place.

  FIG. 4 shows another example in which the fish nest Futon basin 1 is installed in the river accumulation region 15, FIG. 4 (a) is a plan view, and FIG. 4 (b) is an XX in FIG. 4 (a). It is line sectional drawing. Also in this case, since the fish nest Futon shark 1 is located below the water surface WL, the cave (Uro) 7 is always open to the water, and becomes a habit of large fish, an evacuation place, and a breeding place.

  FIG. 5 shows an example in which the fish nest Futon salmon 1 is installed on the root block 16. In this case, the fish nest Futon ridge 1 is located between the high water area WL1 and the low water area WL2, so that it is always on the water surface and sinks below the water surface during a flood. Therefore, the cave 8 in this case functions as an evacuation site for large fish.

It is a perspective view which shows an example of this invention fish nest Futon carp. Example 1 It is a perspective view which shows an example of a cage reinforcement. Example 1 It is a river cross section which shows an example of the construction drawing of this invention fish nest Futon pass. (Example 2) The other example of the construction drawing of this invention fish nest Futon bowl is shown, (a) is a top view, (b) is the XX sectional view taken on the line in (a). (Example 3) It is a river cross section which shows the further different example of the construction drawing of this invention fish nest Futon pass. Example 4

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fish nest Futon reed 2 Futon reed 3 Basket rebar 31 Spiral rebar 32 Reinforcing bar 4a Recessed arc faced stone end material 7 Cave 8 Cave 10 River structure 13 Conventional Futon cicada

Claims (5)

Inside the futon cage incorporates a cylindrical or elliptical cylindrical basket body so as to penetrate the futon cage in the horizontal or vertical direction, the basket body, end material having at least a portion of the recessed circular surface of the lower surface A fish nest that is supported by stone products consisting of plate-like bodies such as slabs and split pieces, and uncut plate-like bodies, and the remaining space inside the Futon Pass is filled with stone-filled stone materials. Futon Pass.   The fish nest Futon sardine according to claim 1, wherein the cage body is supported at a substantially central portion in the vertical direction of the Futon sardine.   3. The fish nest Futon shark according to claim 1 or 2, wherein an opening is formed by incising a part of the wire mesh of the Futon shark that contacts at least one end of the cage body.   The one end portion that is not an opening portion is formed by closing or closing a wire mesh portion and filling a clogging material such as a stone end material into the inside of the portion and closing it. Or the fish nest Futon bowl of Claim 3. In order to create a cave at a location that does not invade the river structure and is in contact with water at all times or at the time of high water laying, at least a part of the lower surface inside the Futon Pass, scraps and split pieces having an arc surface, etc. A fish nest in which a cylindrical or elliptical cylindrical cage body is incorporated in a state of being supported by a stone article made of a plate-like body or a hollowed-out plate-like body, and one end or both ends of the cage body is filled with a filling stone material in the remaining space A method for installing a fish nest Futon sardine, characterized in that the Futon sardine is installed with the opening crossing the direction of flow in front of the root or in a flowing water area.

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