JP7288471B2 - Revetment and its formation method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bank protection and a method for forming the same, and more particularly to a bank protection and a method for forming the same, which enable algae to grow easily and efficiently on a bank protection built with a concrete structure.

As an eco-friendly bank protection structure, a bank protection structure has been adopted in which a wall surface facing a water area of a concrete structure that constitutes the bank protection has a convex portion that serves as a habitat for aquatic organisms such as fish and shellfish (see, for example, Patent Document 1). ). In order to create an environment where aquatic organisms can easily grow, it is preferable to grow algae such as wakame seaweed and kelp on the walls of the concrete structure, which serve as a habitat and hiding place for aquatic organisms and a feed supply function. However, in many cases, there is no natural algae habitat near the water area where the revetment is constructed, or the natural algae habitat is not within the distance where the spores with high growth activity can be expected to reach. It is difficult to grow algae naturally on the walls of the body.

Japanese Patent Application Laid-Open No. 2001-207429

SUMMARY OF THE INVENTION An object of the present invention is to provide a bank protection and a method for forming the bank protection, which enable algae to grow easily and efficiently on a bank protection constructed with a concrete structure.

In order to achieve the above object, the seawall of the present invention is a seawall constructed with a concrete structure, wherein a string-like body in which algae or algae spores are planted is submerged in a water area facing the concrete structure. spores released from algae attached to the concrete structure and planted in the filaments, or spores planted in the filaments germinate and grow A panel member provided with a connecting member capable of connecting the string-like body to a plate-like portion and a convex portion is provided on the wall surface of the concrete structure. The string-like body is fixed to the concrete structure by connecting the string-like body to the connecting member.
Another revetment of the present invention is a revetment constructed with a concrete structure,
A string in which algae or algae spores are inoculated is attached to the concrete structure and planted in the string so as to be movable in the water of the body of water facing the concrete structure. spores released from the algae in the spores, or spores released from the algae that have germinated and grown from the spores planted in the string-like body, are adhered to the wall surface of the concrete structure, Position display means for displaying the position of the body on the water is attached to the concrete structure, and the position display means has a lighting part or a reflector, and the lighting part or the reflector is always in the water area. It is characterized in that it is fixed at a predetermined height above the water surface.

The method for forming a seawall of the present invention is a method for forming a seawall constructed with a concrete structure, wherein a string-like body planted with algae or algae spores is moved in the water of a water area facing the concrete structure. Spores released from algae attached to said concrete structure in a possible state and planted in said filaments, or spores planted in said filamentous bodies are released from germinated and grown algae. When the spores are attached to the wall surface of the concrete structure, on land, a panel member is formed in which a connection member capable of connecting the string-like body to the plate-like portion and a projection are provided, and the panel member is attached to the plate-like portion. The string-like body is attached to the concrete structure by fixing it to the wall surface and connecting the string-like body to the connecting member.
The method for forming a seawall of the present invention is a method for forming a seawall constructed with a concrete structure, wherein a string-like body planted with algae or algae spores is moved in the water of a water area facing the concrete structure. Spores released from algae attached to said concrete structure in a possible state and planted in said filaments, or spores planted in said filamentous bodies are released from germinated and grown algae. When the spores are attached to the wall surface of the concrete structure, position display means for displaying the position of the string-like body on the water is attached to the concrete structure, and the position display means is provided with a lighting part or a reflector. and the lighting unit or the reflector is always fixed at a predetermined height above the water surface of the water area.

According to the present invention, by intentionally attaching algae or algae spore-inoculated strands to a concrete structure, the spores released from the algae planted in the strands, or the strands, The spores released from the algae that have germinated and grown from the planted spores are allowed to adhere to the walls of the concrete structure. As a result, it is possible to easily and efficiently form a state in which algae grow thickly on the wall surface of the concrete structure.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which illustrates the bank protection of embodiment which concerns on this invention in perspective. It is explanatory drawing which illustrates the bank protection of FIG. 1 by the side view. It is explanatory drawing which illustrates the bank protection of another embodiment which concerns on this invention in perspective. It is explanatory drawing which illustrates the bank protection of another embodiment which concerns on this invention in perspective. It is explanatory drawing which illustrates the bank protection of FIG. 4 by the side view. It is explanatory drawing which illustrates the bank protection of FIG. 4 by front view. It is explanatory drawing which illustrates the bank protection of another embodiment which concerns on this invention in perspective. It is explanatory drawing which illustrates the bank protection of FIG. 7 by the side view. It is explanatory drawing which illustrates the bank protection of FIG. 7 by front view.

Hereinafter, a seawall and a method for forming the same according to the present invention will be described based on embodiments shown in the drawings.

As illustrated in FIGS. 1 and 2, the bank protection 1 of the present invention is formed in water areas such as the sea, lakes, and rivers. In the drawings of the present application, the X direction indicates the depth direction of the bank protection 1, the Y direction indicates the width direction of the bank protection 1, and the Z direction indicates the vertical direction.

The seawall 1 is constructed with a concrete structure 2 installed on the bottom B of the water. The concrete structure 2 is composed of, for example, a caisson or an existing seawall. The shape and structure of the concrete structure 2 are not particularly limited. In this embodiment, the wall surface 4 of the concrete structure 2 facing the water area is a vertical surface, but the wall surface 4 may be an inclined surface or have an uneven shape.

The seawall 1 is attached to the concrete structure 2 in a state in which the algae 11 or the spores (zoospores) 12 of the algae 11 are planted and the string-like bodies 10 can float in the water of the water area facing the concrete structure 2. installed. As exemplified in FIG. 2, this bank protection 1 is composed of spores 12 released from algae 11 planted in a string-like body 10 attached to a concrete structure 2, or spores planted in the string-like body 10. A major feature is that the spores 12 released from the algae 11 that have germinated and grown adhere to the wall surface 4 of the concrete structure 2 .

As the string-like body 10, for example, a rope or the like used for cultivating algae 11 is used. Examples of the algae 11 include seaweeds such as wakame seaweed and kelp, and freshwater algae. In this embodiment, as an algae 11, seaweed that has germinated and grown on the string-like body 10 is planted.

When the algae 11 that have germinated and grown are planted on the string-like body 10, for example, a method of sandwiching the root portion of the algae 11 between the twists of the string-like body 10, or a method of using threads or the like to attach the string-like body A string 10 planted with algae 11 can be formed by a method of binding algae 11 to 10 . When the spores 12 are planted on the string-like body 10, for example, the seedling thread with the spores 12 is sandwiched between the strands of the string-like body 10, or the seedling thread with the spores 12 is wound around the string-like body 10. The method can form strands 10 seeded with spores 12 . Algae 11 or spores 12 may be planted at regular intervals in the longitudinal direction of string-like body 10 .

In this embodiment, on the wall surface 4 of the concrete structure 2 facing the water area, a pair of connecting members 13 capable of connecting the string-like body 10 are fixed apart from each other in the lateral direction Y. A string-like body 10 is bridged between 13 . The connecting member 13 can be composed of, for example, a metal fitting provided with a hook at the tip of an anchor bolt. A root portion of an anchor bolt constituting a connecting member 13 is driven into the wall surface 4, and the end of the string-like body 10 is detachably connected to the hook of the connecting member 13 arranged on the water area side.

The shape of the connecting member 13 and the fixing method to the wall surface 4 are not limited to this embodiment as long as the connecting member 13 can be connected to the string-like body 10, and various other structures are possible. For example, the connecting member 13 can be embedded in the wall surface 4 in advance when the concrete structure 2 is manufactured, or the connecting member 13 can be fixed to the wall surface 4 with an adhesive or the like. The connecting member 13 can be arranged not only in the area of the wall surface 4 located underwater, but also in the area of the wall surface 4 located above the water. The connecting member 13 can also be arranged at a position other than the wall surface 4, such as the upper surface 3 of the concrete structure 2, for example.

The spores 12 released from the planted algae 11 or the spores 12 released from the algae 11 grown by germination of the planted spores 12 are attached to the wall surface 4 of the concrete structure 2 . bridge within reach. It is preferable that the string-like body 10 is stretched with a certain degree of slack. By providing slack in the string-like body 10, the string-like body 10 becomes easy to move in water, and the algae 11 planted on the string-like body 10 (hereinafter, also includes algae 11 grown by germination of spores 12). The spores 12 released from the wall surface 4 are likely to adhere to a wide range. In addition, by providing slack in the string-like body 10 to make it easy to move in water, the water suspended matter accumulates on the leaves of the algae 11 and the water suspended matter accumulates on the leaves. Inhibition can be prevented. Therefore, it is advantageous for promoting the germination of spores 12 planted on the filamentous body 10, the growth of algae 11, the release of spores 12 by algae 11, and the like.

Moreover, it is preferable that the string-like body 10 be arranged in a range where the portion where the algae 11 or the spores 12 are planted (hereinafter referred to as the planted portion) does not come into contact with the wall surface 4 even when floating in water. Specifically, the planted portion of the string-like body 10 may be arranged in a range where the distance L in the depth direction X from the wall surface 4 is, for example, 0.5 m or more and 2.0 m or less.

The string 10 is placed at a height such that the planted portion is always submerged in water. That is, the planted portion of the string-like body 10 is arranged at a position lower than the water surface position WL at low tide of the water area. Furthermore, it is preferable that the planting portion of the string-like body 10 be placed at a water depth that allows sufficient sunlight to allow photosynthesis of the planted algae 11 . However, if the algae 11 dry out, they may grow poorly or die, so it is preferable to arrange the planted portion of the string-shaped body 10 at a water depth that does not allow the algae 11 planted in the string-shaped body 10 to dry out. . Specifically, the planting portion of the string-like body 10 may be arranged in a range where the depth D from the water surface position WL at low tide of the water area is, for example, 30 cm or more and 250 cm or less. The arrangement of the string-like bodies 10 and the connecting members 13, the length of the string-like bodies 10, the number of installed strings, and the like can be appropriately determined according to the shape of the concrete structure 2, the width of the wall surface 4, and the like. For example, it is also possible to arrange a plurality of string-like bodies 10 that extend in the horizontal direction Y and are bridged over at intervals in the vertical direction Z.

Next, an example of the work procedure for forming the bank protection 1 will be described.

A string-like body 10 planted with algae 11 or spores 12 is attached to a concrete structure 2 installed on the bottom B of water. The string-like body 10 is stretched with some degree of slack so that the planted part can float in the water of the water area. In this embodiment, a pair of connecting members 13 are fixed to the wall surface 4 of the concrete structure 2 so as to be spaced apart in the lateral direction Y, and the string-like body 10 is stretched between the pair of connecting members 13 .

The work of fixing the connecting member 13 to the wall surface 4 and the work of connecting the string-like body 10 to the connecting member 13 are performed by divers. Alternatively, the above-described work can also be performed on a scaffold that is installed on the concrete structure 2 and extends into the water. For example, before the concrete structure 2 is installed on the bottom B of the water, the connection member 13 can be fixed to the wall surface 4 on land in advance.

The process by which algae 11 grow on the wall surface 4 by the completed revetment 1 is as follows.

When the algae 11 release the spores 12, a large amount of spores 12 are released into the water from the algae 11 (including the algae 11 grown by germination of the spores 12) planted in the filamentous body 10. - 特許庁Since the string-like body 10 is attached to the concrete structure 2 so as to be movable in water, the spores of the algae 11 floating in the water together with the string-like body 10 are directed toward the wall surface 4 and various other directions. 12 is widely released. Then, the spores 12 released from the algae 11 planted on the string-like body 10 adhere to the wall surface 4 of the concrete structure 2 and the bottom B of the water. When the spores 12 adhering to the wall surface 4 germinate and grow, algae 11 grow over a wide area of the wall surface 4 .

As described above, according to the present invention, by attaching the string-like body 10 intentionally planted with algae 11 or spores 12 to the concrete structure 2, the spores 12 of the algae 11 can be effectively spread to the wall surface 4 of the concrete structure 2. can be adhered As a result, the wall surface 4 of the concrete structure 2 can be easily and efficiently formed with algae 11 growing thereon. Algae 11, which serve as a dwelling place, a hiding place, a nursery place, and a spawning place for aquatic organisms, grow thickly on the wall surface 4, so that the seawall 1 is formed in which aquatic organisms can easily gather and aquatic organisms can easily grow.

Furthermore, the algae 11 planted on the string-like body 10 also function as a hiding place for aquatic organisms and a feeding ground for microorganisms and small leafy organisms (e.g., amphipods and croakers). easier to gather. In addition, the algae 11 planted on the string-like body 10 also function as a canopy to block the sunlight shining on the wall surface 4, and a shade area with relatively low water temperature is also formed near the wall surface 4. - 特許庁Furthermore, since the algae 11 planted on the string-like body 10 and the algae 11 grown on the wall surface 4 of the concrete structure 2 form a three-dimensional structure, the seawall 1 is very easy for aquatic organisms to grow. Become.

Further, when the algae 11 grow on the wall surface 4 of the concrete structure 2, the algae 11 grown on the wall surface 4 release spores 12, which adhere to the wall surface 4. - 特許庁By repeating the above-described cycle, the state in which the algae 11 grow on the wall surface 4 of the concrete structure 2 continues for many years without much effort.

For example, as a method of growing the algae 11 on the wall surface 4, a diver can directly plant the algae 11 on the wall surface 4, but planting the algae 11 over a wide area requires a lot of time and effort, and the construction period is long. . In contrast, in the present invention, the work of planting the algae 11 and the spores 12 on the string-like body 10 can be performed on land, and only the work of attaching the string-like body 10 to the concrete structure 2 can be performed in the water area at the site. . Since the spores 12 released from the algae 11 planted on the filamentous body 10 spread over a wide range in water, the spores 12 can efficiently adhere to a wide range of the wall surface 4 .

In addition to simply supplying algae 11 to the seawall 1, a cord-like body 10 in which algae 11 or spores 12 are planted is installed to allow the growth and thickening of the seawall 1 until the spores 12 are supplied. As a result, in the growth process of the algae 11 planted on the string-like body 10, the algae themselves function to provide habitats and hiding places for aquatic organisms in the vicinity of the bank protection 1, and to supply feed, and supply spores 12. The effect of the growth of algae 11 on the revetment 1 to be formed later becomes more reliable.

In addition, seaweed dies in a one-year cycle, and kelp dies in a two-year cycle, and the amount of spores 12 released by algae 11 and the germination rate of spores 12 are affected by the climate. Therefore, it is conceivable that the algae 11 thriving on the wall surface 4 may temporarily decrease in some years. , new spores 12 can adhere to the wall surface 4 . Therefore, it is very advantageous to reduce the labor and cost required to maintain the state in which the algae 11 are grown on the wall surface 4 for many years.

As in this embodiment, a pair of connecting members 13 capable of connecting the string-like body 10 to the concrete structure 2 are spaced apart in the lateral direction Y and fixed, and the string-like body 10 is hung between the pair of connecting members 13 . This is advantageous for efficiently attaching the spores 12 over a wide area of the wall surface 4 . Also, even when the algae 11 planted on the string-like body 10 dies, the string-like body 10 can be removed from the connecting member 13 and attached to the connecting member 13 to attach a new string-like body 10 to the wall surface 4. It becomes possible to attach new spores 12 .

Another embodiment of the seawall 1 of the present invention is illustrated in FIG.

In this embodiment, as the concrete structure 2, a caisson (so-called slit caisson) having a slit 5 (cavity) communicating from the upper surface 3 to the wall surface 4 is employed. As illustrated in FIG. 3 , when the planted portion of the string-like body 10 is stretched over the inside of the slit 5 , the spores 12 released from the algae 11 planted on the string-like body 10 are spread over the inner wall surface of the slit 5 . 4 and the bottom surface of the slit 5 can be attached. As a result, algae 11 can be efficiently formed on the wall surface 4 and the bottom surface inside the slit 5, and the space inside the slit 5 can be made an environment where aquatic organisms can easily grow.

As illustrated in FIG. 3, the direction in which the string-like body 10 extends is not limited to the lateral direction Y, but can be extended in various directions such as the vertical direction Z and oblique directions. Even when the string-like body 10 extends in the vertical direction Z or in an oblique direction, a pair of connecting members 13 are fixed to the wall surface 4 while being separated from each other in the direction in which the string-like body 10 extends. The string-like body 10 can be easily attached to the concrete structure 2 by bridging the string-like body 10 between them. For example, a weight (for example, an anchor) attached to the lower end of the string-like body 10 is placed on the water bottom B of the concrete structure 2, and the string-like body 10 is extended in the vertical direction Z or oblique directions. can also Thus, even when the string-like body 10 is extended in a direction other than the lateral direction Y, substantially the same effect as the embodiment exemplified above can be obtained.

As in this embodiment, when the wall surface 4 of the concrete structure 2 is provided with the slits 5, the space inside the slits 5 where the spores 12 adhere and the algae 11 grow overgrown becomes aquatic. Since it serves as a dwelling place and a hiding place for living things, it becomes a seawall 1 in which aquatic organisms can easily gather and grow easily.

4 to 6 illustrate yet another embodiment of the seawall 1 of the present invention.

The concrete structure 2 of this embodiment has a plurality of protrusions 6 and slits 5 arranged side by side in the vertical direction Z on the wall surface 4 and protruding toward the water area. The convex portion 6 is made of, for example, reinforced concrete or a metal member. The convex portion 6 is fixed to the concrete structure 2 with a fixture (bolt or the like). In this embodiment, a plurality of projections 6 are arranged in regions between slits 5 formed at intervals in the horizontal direction Y of the concrete structure 2 . The convex portion 6 can also be provided in a region positioned above or below the slit 5, for example.

When the protrusions 6 are provided on the wall surface 4 as in this embodiment, it is preferable that the planted portion of the string-like body 10 be arranged in a range where the protrusions 6 do not come into contact with the protrusions 6 even when the string-like body 10 moves freely. Spores 12 can be efficiently attached to a wide range of the convex portion 6 by spanning the string-like body 10 so that the planting portion is located above the convex portion 6 or on the water area side.

In this embodiment, a frame member 14 is used to attach the string-like body 10 to the concrete structure 2 . The frame member 14 includes an upper frame 14a extending in the depth direction X of the concrete structure 2, a lower frame 14b connected to the water area side of the upper frame 14a and extending in the vertical direction Z, and the lower frame 14b. and a protruding frame 14c protruding toward the water area. A connecting member 13 is provided at the tip of the protruding frame 14c on the water area side. In the frame member 14 of this embodiment, the upper frame 14a and the lower frame 14b are composed of L-shaped frames, and the projecting frame 14c is composed of brackets fixed to the L-shaped frames. The upper frame 14a and the lower frame 14b are formed with through-holes through which fixtures can be inserted.

In this embodiment, a position display means 15 for displaying the position of the string-like body 10 on the water is further provided. The position display means 15 includes a column extending in the vertical direction Z, the lower end of which is fixed to the projecting frame 14c of the frame member 14, and a lighting section provided on the top of the column. The lighting unit is configured to light up or flash on the water. The position display means 15 is not particularly limited as long as it can display the position of the string-like body 10 on the water.

In this embodiment, the connection member 13 and the position display means 15 are fixed to the frame member 14 on land (for example, on the concrete structure 2 or the like). Then, the operator places the lower frame 14 b of the frame member 14 along the wall surface 4 on the concrete structure 2 and fixes the upper frame 14 a to the upper surface 3 of the concrete structure 2 . As a result, the alignment of the frame member 14 with respect to the concrete structure 2 is completed, and the connection member 13 and the position display means 15 are fixed to the concrete structure 2 together with the frame member 14 . After that, if the lower frame 14b is fixed to the wall surface 4 using fixtures or the like as necessary, the frame member 14 can be fixed to the concrete structure 2 more firmly. The lighting portion of the position display means 15 is placed above the water.

Next, a diver or the like connects the string-like body 10 in which the algae 11 or spores 12 are planted to the connecting member 13 to attach the string-like body 10 to the concrete structure 2 . This embodiment exemplifies a case in which both algae 11 and spores 12 are planted on the string-like body 10 .

When the frame member 14 is used as in this embodiment, the connection member 13 can be attached to the concrete structure simply by fixing the upper frame 14a on the concrete structure 2 to the upper surface 3 of the concrete structure 2. 2 can be easily fixed. Therefore, it is more advantageous to efficiently form the bank protection 1 with a small number of man-hours.

When the position display means 15 is attached to the concrete structure 2, a sailor of a ship navigating in the water area facing the bank protection 1 will see an accessory (string-like body 10) closer to the water area than the wall surface 4 of the concrete structure 2. Since it is provided and it is possible to clearly recognize that it is impossible to dock, it is possible to more reliably prevent a ship from erroneously docking the revetment 1 and interfering with the string-shaped body 10.例文帳に追加

By fixing the position display means 15 to the frame member 14 and installing the position display means 15 together with the frame member 14, the position display means 15 can be easily attached to the concrete structure 2 with a small number of man-hours. For example, the position display means 15 can be installed on the frame member 14 after the frame member 14 is fixed to the concrete structure 2 . Also, for example, the position display means 15 can be fixed to the concrete structure 2 separately from the frame member 14 .

When both the algae 11 and the spores 12 are planted in the filamentous body 10, the already growing algae 11 and the algae 11 growing by germination from the spores 12 can release the spores 12 at two different times. become. Therefore, the spores 12 can be adhered to the wall surface 4 more reliably.

When the wall surface 4 is configured to have the protrusions 6, the protrusions 6 to which the spores 12 are adhered and the algae 11 are thickened become a dwelling place or a hiding place for the aquatic organisms, thereby making it easier for the aquatic organisms to gather. , becomes a bank protection 1 where aquatic organisms grow more easily. The shape of the projection 6 is not particularly limited, but as illustrated in FIG. With the configuration having the front face portion 8 extending downward, the algae 11 grow very easily on the convex portion 6 . When the angle θ formed by the extending direction of the upper surface portion 7 and the extending direction of the front surface portion 8 in a side view is within the range of 20° or more and 70° or less, algae 11 are formed at the tip portion of the convex portion 6 on the water area side. (especially wakame seaweed) grow more easily.

Furthermore, if the tip of the convex portion 6 has a ridge 9 formed by the tip of the top surface 7 and the tip of the front surface 8, the spores 12 adhere to the sharp edge 9. Since deposits that hinder the growth of algae 11 are less likely to accumulate, the convex portion 6 becomes a very suitable base for the algae 11 to grow. The convex portion 6 may have a smooth surface without irregularities, but if the surface has a large number of small irregularities, the spores 12 will be easier to settle and the algae 11 will be easier to grow.

The projecting length of the projections 6 toward the water area, the width of the projections 6, the number and arrangement of the projections 6 provided on the wall surface 4, etc., depend on the structure and shape of the concrete structure 2, the width of the wall surface 4, and the like. can be determined as appropriate. The projection length of the convex portion 6 toward the water area is preferably set within a range of 0.2 m or more and 1.5 m or less. The shape of the projection 6 is not limited to this embodiment, and for example, the projection 6 may have a curved or chamfered tip on the water area side, or a rectangular parallelepiped projection 6 may be provided. The method of fixing the convex portion 6 to the concrete structure 2 is not particularly limited, and for example, it can be fixed with an adhesive or welding. Further, for example, a configuration in which the concrete structure 2 and the convex portion 6 are integrated, that is, a configuration in which the convex portion 6 is integrally formed with the concrete structure 2 in advance may be used.

In this way, by introducing a shape that positively promotes the adherence and growth of the spores 12 of the algae 11 to the wall surface 4 of the seawall 1, the spores 12 of the algae 11 are supplied and received on the wall surface 4 of the seawall 1. By the cooperative action with the invention, the seawall 1 actively causes the algae 11 to flourish, and the start of the cycle for the subsequent autonomous growth of the algae 11 can be more effectively accelerated.

7 to 9 illustrate yet another embodiment of the seawall 1 of the present invention.

In this embodiment, a panel member 16 is used to attach the string-like body 10 and the projection 6 to the concrete structure 2 . The panel member 16 has a structure in which the connecting member 13 and the convex portion 6 are provided on a plate-like portion 16a made of a flat plate member. A pair of connecting members 13 protruding toward the water area are spaced apart in the horizontal direction Y and fixed to the upper portion of the plate-like portion 16a. A plurality of block members constituting the convex portion 6 are fixed in the up-down direction Z at positions lower than the connecting member 13 of the plate-like portion 16a. The projection 6 of this embodiment has a chamfered tip on the water area side. The panel member 16 provided with the connecting member 13 and the projection 6 can be formed on land.

In this embodiment, frame members 14 are fixed to both ends of the panel member 16 in the horizontal direction Y, and the panel member 16 is attached to the concrete structure 2 together with the pair of frame members 14 . In this embodiment, a protruding frame 14c (bracket) is fixed to the upper part of the lower frame 14b of each of the pair of frame members 14, and the position display means 15 is fixed to the protruding frame 14c. The panel member 16 is fixed to the lower part of each lower frame 14b by a fixture.

As in this embodiment, on land, the panel member 16 having the connecting member 13 and the convex portion 6 provided on the plate-like portion 16a is formed, and the panel member 16 is fixed to the wall surface 4 and connected. By connecting the string-like body 10 to the member 13, the string-like body 10 and the convex portion 6 can be easily attached to the concrete structure 2 with a very small number of man-hours in the water area at the site.

Furthermore, when the panel member 16 is fixed to the frame member 14 on land and the panel member 16 is attached to the concrete structure 2 together with the frame member 14, the string-like body 10 and the projection 6 are attached to the concrete structure 2. Can be attached more easily. Note that the panel member 16 can also be fixed directly to the wall surface 4 of the concrete structure 2 with a fixture or the like without using the frame member 14, for example.

In each of the embodiments illustrated above, the case where the string-like body 10 is attached to the front side (offshore side) of the concrete structure 2 is illustrated, but similarly, for example, the side face of the concrete structure 2 facing the water area The string-like body 10 can also be attached to the . The present invention is not limited to the case of forming a new bank protection 1, and for example, the bank protection 1 of the present invention can be formed by attaching the string-like body 10 to an existing bank protection.

1 Revetment 2 Concrete structure 3 Upper surface 4 Wall surface 5 Slit 6 Projection 7 Upper surface 8 Front surface 9 Ridge 10 Cord-like body 11 Algae 12 Spore 13 Connecting member 14 Frame member 14a Upper frame 14b Lower frame 14c Protruding frame 15 Position display Means 16 Panel member 16a Plate-like portion B Water bottom WL Water surface position at low tide

Claims (9)

In a seawall built with a concrete structure,
A string in which algae or algae spores are inoculated is attached to the concrete structure and planted in the string so as to be movable in the water of the body of water facing the concrete structure. spores released from the algae in the soil, or spores released from the algae that have germinated and grown from the spores planted on the cord-like body, are attached to the wall surface of the concrete structure,
A panel member provided with a connecting member that can connect the string-like body to a plate-like portion and a convex portion is fixed to the wall surface, and the string-like body is connected to the connecting member. , a revetment, wherein the string-like body is attached to the concrete structure. 2. The bank protection according to claim 1, wherein the algae or algae spores planted part of the cord-like body is arranged above the highest convex part. the panel member is fixed to a frame member that extends above the water;
The bank protection according to claim 1 or 2, wherein the panel member is fixed to the wall surface by fixing an upper portion of the frame member to a portion of the concrete structure located above water. In a seawall built with a concrete structure,
A string in which algae or algae spores are inoculated is attached to the concrete structure and planted in the string so as to be movable in the water of the body of water facing the concrete structure. spores released from the algae in the soil, or spores released from the algae that have germinated and grown from the spores planted on the cord-like body, are attached to the wall surface of the concrete structure,
Position display means for displaying the position of the string on the water is attached to the concrete structure, and the position display means has a lighting portion or a reflector, and the lighting portion or the reflector is always on. A revetment, characterized in that it is fixed at a predetermined height above the water surface of the water area. In a method for forming a seawall constructed with a concrete structure,
Algae or algae spore-inoculated strands are attached to the concrete structure in a state of being able to float in the water of the water area facing the concrete structure, and are released from the algae planted in the strands. When attaching spores or spores released from algae grown by germination of spores planted on the cord-like body to the wall surface of the concrete structure,
On land, a panel member is formed on a plate-like portion and provided with a connecting member capable of connecting the string-like body and a convex portion, the panel member is fixed to the wall surface, and the connecting member is attached to the above-mentioned connecting member. A method of forming a seawall, characterized in that the string-like body is attached to the concrete structure by connecting the string-like body. 6. The method of forming a bank protection according to claim 5, wherein the algae or algae spores planted portion of the cord-like body is arranged above the highest convex portion. fixing the panel member to the frame member;
7. The method of forming a bank protection according to claim 5, wherein the panel member is fixed to the wall surface by fixing an upper portion of the frame member to a portion of the concrete structure located above water. 7. The position display means according to claim 5 or 6, wherein a position display means for displaying the position of said string on the water is fixed to a frame member , and said position display means is fixed to said concrete structure together with said frame member. Formation method of seawall . In a method for forming a seawall constructed with a concrete structure,
Algae or algae spore-inoculated strands are attached to the concrete structure in a state of being able to float in the water of the water area facing the concrete structure, and are released from the algae planted in the strands. When attaching spores or spores released from algae grown by germination of spores planted on the cord-like body to the wall surface of the concrete structure,
Position display means for displaying the position of the string on the water is attached to the concrete structure, and the position display means is provided with a lighting section or a reflecting plate so that the lighting section or the reflecting plate is always displayed in the water area. A method of forming a seawall, characterized in that the seawall is fixed at a predetermined height above the water surface.

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