JP3026838U - Revetment block - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a revetment block which can form an extremely natural revetment wall and can be expected to purify water. SOLUTION: This is a concrete revetment block 10 forming a revetment wall of a river, wherein a hole 14 is provided in a wall surface located on the river side when the revetment wall is formed,
A seed sheet 32, in which seeds 28 such as grass and trees are held by a sheet 26, is arranged on the front surface side in the bag 22, and soil 2 is provided inside.
The sandbag 12 filled with 4 is inserted into the hole 14, and the hole 14 is closed by a mesh body 18.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a revetment block, and more particularly to a revetment block that can grow grass and trees.

[0002]

[Prior art]

 Conventionally, river revetment blocks are made of concrete, etc., and are used on the walls of rivers (including the walls that form the bottom of rivers) for the purpose of preventing river erosion and preventing sediment transport. In the past, many of these types of revetment blocks were made only of concrete, but because they destroy the landscape, recently, revetment blocks with natural stone adhered to their surfaces have also appeared. Alternatively, as disclosed in JP-A-5-107878, there is a bank protection block in which a hole is formed in a concrete wall surface, natural stone is filled in the hole, and the hole is covered with a net. This revetment block is suitable because it can be secured as a habitat and evacuation site for living things (fish, etc.) living in rivers and riverbanks due to the space between natural stones.

[0003]

[Problems to be solved by the device]

 However, even though the above-mentioned conventional revetment blocks are filled with natural stone, they are basically made of concrete, so grass and trees do not grow like natural revetment walls, and the landscape However, the water purification effect cannot be expected.

Therefore, the present invention has been made to solve the above problems, and an object thereof is to form a very natural revetment wall and to expect water purifying action and the like. To provide.

[0005]

Means for Solving the Problems The present invention has the following configuration in order to achieve the above object. That is, a concrete revetment block that forms a revetment wall of a river, in which a wall is located on the river side when the revetment wall is formed, a hole is provided, and seeds such as grass and trees are placed in the bag. The seed sheet held by the sheet is arranged on the surface side, and the sandbag with the soil filled inside is inserted into the hole, and the hole is closed by a mesh body. There is. Since the sandbag with the seed sheet inside is inserted into the hole along with the soil, when the revetment wall is formed, seeds sprout from the seed, break through the bag, and grow from the net to the outside of the hole. Alternatively, a natural revetment wall covered with trees can be formed. Since the sandbag is closed by the net, the soil will not flow out from the hole.

The net body is formed into a basket shape having an opening on the rear surface side, the bottom surface portion closes the hole, and the side wall portion is fixed by the concrete on the inner wall side of the hole to prevent the net body from falling off. It is suitable. Further, since the hole is formed as a through hole penetrating to the rear part, especially in the case of a tree, the root extends into the rear bank, which is also suitable for holding the revetment wall. Alternatively, the hole is made to close the rear surface side with concrete, and a pipe that connects the hole and the rear portion side is embedded in the concrete, so that the necessary water flow can be achieved. Furthermore, by embedding natural stones on the concrete wall facing the river to expose the surface, a more natural revetment wall can be formed. In addition, by storing the natural stone between the mesh and the sandbag with the surface side exposed, it is possible to form a more natural revetment wall, and this stone can hold down the sandbag to prevent the outflow of soil. It can be prevented more effectively.

[0007]

[Embodiment of device]

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a front view of the revetment block 10, FIG. 2 is a vertical sectional view, and FIG. 3 is a sectional view of the sandbag 12. The revetment block 10 is basically made of concrete, and a hole 14 is provided in the central portion of the revetment block 10 which opens to the front side (the surface which becomes the river side when the revetment wall is formed). As shown in FIG. 2, the hole 14 has a rear surface side closed with concrete. Reference numeral 16 denotes a pipe embedded in the rear wall, which communicates the inside of the hole 14 with the rear side.

Reference numeral 18 denotes a net, which is fixed by concrete so as to cover the opening of the hole 14. A natural stone 20 is exposed on the front wall of the revetment block 10 and fixed to concrete in an appropriate arrangement. The sandbag 12 shown in FIG. 3 is inserted into the hole 14. The sandbag 14 has a bag 22 made of synthetic resin filled with soil 24, and the bag on the front side when inserted into the hole 14 has grass on the surface of a sheet 26 made of paper or the like. Seeds 28 such as trees are arranged in an appropriate arrangement, and a seed sheet 32 formed by covering the seeds 28 with a covering paper 30 attached to the sheet 26 is arranged.

With the above structure, as shown in FIG. 4, when the revetment blocks 10 are appropriately stacked to form the revetment wall, the seeds 28 in the seed sheet 32 are transferred to the sheet 26, Alternatively, it absorbs water through the wrapping paper 30, sprouts, breaks through the bag 22 and grows outside the hole 14 from the net 18, and eventually covers the revetment wall. Therefore, the revetment wall can be a revetment wall that is close to nature and is covered with grass such as reeds or willow trees, which prevents the landscape from being damaged. Water flows into the sandbags 12 not only directly from the river but also from the outside through the pipe 16 during the dry season, etc., so that the death of grass and trees can be prevented. Since the sandbag 12 is covered with the net body 18, it is possible to prevent the outflow of soil or the like. The revetment block 10 can also be used for riverbeds, as shown in FIG. In this case, grasses, trees, etc. grow in the water, act to purify the water, and provide habitat for fish and the like. The soil of the sandbag 12 may be charcoal or may be mixed with charcoal. In this case, it is possible to further favorably purify water by the adsorption action of charcoal.

The natural stone 20 does not necessarily have to be arranged on the front wall of the revetment block 10. In this case, the hole 14 may be formed large on the front wall to increase the area over which plants grow. it can. The holes 14 may be formed in through holes as shown in FIG. This is especially suitable for setting large roots such as trees, and it is possible to secure a large root extension space, and the roots extend outward from the hole 14 and extend to the outside bank, so it is useful for holding blocks. Is also useful. 6 and 7 show another embodiment. In this embodiment, the natural stone 21 is housed between the sandbag 12 and the net 18 so that the surface side is exposed. According to this, since natural stones are arranged on the entire front side of the block, a more natural landscape can be maintained, and since the natural stones 21 are present on the entire side of the sandbag, the outflow of sandbags 12 is further effective. Can be prevented.

FIG. 8 shows an example of a method of manufacturing the revetment block 10 shown in FIG. First, the cage-shaped net 18 is housed in the center of the mold 34 with the opening side up. Sand having an appropriate thickness is put on the inner bottom surface of the mold 34 on both sides of the net 18. Then, the natural stones 20 are arranged on this sand in an appropriate arrangement. An appropriate number of sandbags 12 described above are stored in the net 18 with the seed sheet 32 side facing down. Then, the space on both sides of the net 18 is filled with concrete and solidified, then taken out from the mold 34 and the sand is washed away with water, whereby the revetment block 10 can be manufactured. The revetment block 10 shown in FIG. 1 can be manufactured by incorporating a pipe 16, covering the sandbag 12 and pouring concrete. In the block 10 for revetment shown in FIG. 6, natural stone is put in the net 18 and the sandbag 12 is put on it. It is preferable to use a cage-like net 18 as described above, because the hole 14 is covered by the bottom surface and the side wall is fixed in the concrete.

Although the present invention has been variously described above with reference to preferred embodiments, the present invention is not limited to this, and many modifications can be made without departing from the spirit of the invention. Of course.

[0013]

[Effect of device]

 According to the revetment block according to the present invention, since the sandbag in which the seed sheet is embedded is inserted into the hole together with the soil, when the revetment wall is formed, the seeds sprout and break through the bag. A natural revetment wall covered with grass or trees can be formed by growing from the net outside the hole. Since the sandbag is closed by the net, the soil never flows out from the hole. It is preferable that the mesh body is formed in a basket shape having an opening on the rear surface side, the bottom portion closes the hole, and the side wall portion is fixed by the concrete on the inner wall side of the hole so as to prevent falling off. Further, since the hole is formed as a through hole penetrating to the rear part, especially in the case of a tree, the root extends into the rear bank, which is also suitable for holding the revetment wall. Alternatively, the hole is made to close the rear surface side with concrete, and a pipe that connects the hole and the rear portion side is embedded in the concrete, so that the necessary water flow can be achieved. Furthermore, by embedding natural stones on the concrete wall facing the river to expose the surface, a more natural revetment wall can be formed. In addition, by storing the natural stone between the mesh and the sandbag with the surface side exposed, it is possible to form a more natural revetment wall, and this stone can hold down the sandbag to prevent the outflow of soil. It can be prevented more effectively.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment.

FIG. 2 is a vertical cross-sectional view of the block shown in FIG.

FIG. 3 is a cross-sectional explanatory view of a sandbag.

FIG. 4 is an explanatory view in which a seawall is formed.

FIG. 5 is a vertical cross-sectional view showing a second embodiment.

FIG. 6 is a vertical cross-sectional view showing a third embodiment.

FIG. 7 is a front view of the block of FIG.

FIG. 8 is an explanatory diagram showing an example of a block manufacturing method.

[Explanation of symbols]

 10 Blocks for revetments 12 Sandbags 14 Holes 16 Pipes 18 Nets 20 Natural stones 21 Natural stones 22 Bags 24 Soil 26 Sheets 28 Seeds 30 Cover paper 32 Seed sheets 34 Formwork

Claims (6)

[Scope of utility model registration request] 1. A concrete revetment block which forms a revetment wall of a river, wherein a wall is located on the river side when the revetment wall is formed, and a hole is provided in the bag so that grass and trees are provided in the bag. A seed sheet in which seeds such as are held in a sheet is arranged on the surface side, and a sandbag filled with soil inside is inserted into the hole, and the hole is closed by a mesh body. Blocks for revetment. 2. The net body is formed in a cage shape having an opening on the rear surface side, the bottom surface portion closes the hole, and the side wall portion is fixed by concrete on the inner wall side of the hole. The revetment block according to item 1. 3. The revetment block according to claim 1, wherein the hole is formed as a through hole penetrating to a rear portion. 4. The concrete is characterized in that the rear side of the hole is closed by concrete, and a pipe connecting the hole and the rear side is embedded in the concrete.
Block for the seawall described. 5. The revetment block according to claim 1, wherein natural stone is buried in a concrete wall surface facing the river with its surface exposed. 6. The revetment block according to claim 1, wherein natural stone is housed between the net body and the sandbag with the surface side exposed.