JPH0223625Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention relates to a concrete block for a waterway that can be used as a waterway for irrigation or drainage. In particular, the present invention relates to a concrete block for waterways suitable for use as a ridge forming a boundary between fields or between fields and irrigation channels.

(Conventional technology) Traditionally, ridges were created by mounding soil and maintained before rice planting every year, but this ridge painting required a large amount of labor and the ridge area occupied a considerable area. Recently, hard vinyl chloride or corrugated slate are used, and permanent ridges are sometimes made of concrete. These methods do not require the labor of weeding and are effective in preserving border lines, so they are likely to become more popular in the future.

In particular, ridges made of concrete blocks for waterways and ridges made of concrete blocks that also serve as irrigation channels are seen as promising because of their excellent water use.

For this concrete block ridge that also serves as an irrigation canal, a U-shaped groove concrete block, which has conventionally been widely used as a canal block, is used. By burying these U-shaped groove blocks around the rice fields and surrounding them, ridges are formed and irrigation canals are provided. Moreover, the U-shaped groove block is provided so that it can be covered and walked on or agricultural machinery and the like can be moved thereon.

(Problems to be solved by the invention) However, this conventional concrete block ridge for waterways is made by connecting U-shaped groove blocks with mortar so that the end faces of the blocks abut, so it is difficult to prevent undulations or subsidence of the ground. It is brittle against concentrated loads, and there is a risk of water leakage at the joints. Also,
The ridges of this U-shaped ditch block and the rice fields are connected by one or more water inlets and outlets located above the topsoil, so even if water is drained, only surface drainage remains, and the topsoil still retains a considerable amount of water even after drainage. It is a so-called semi-humid rice field with water and moisture, which still has the disadvantage of requiring the use of a large amount of fertilizer compared to dry rice fields. still,
These problems occur not only when used as ridge blocks but also when used as side ditches or drainage ditches, and it is particularly desirable to improve them when used as drainage ditches on the edge of mountains.

SUMMARY OF THE INVENTION An object of the present invention is therefore to provide a concrete block for a waterway that can be used to construct ridges or drainage ditches that have excellent installation strength and good drainage performance.

Structure of the invention (means for solving the problem) In order to achieve the above object, the concrete block for waterways of the invention has a drainage hole in the side wall of at least one piece and connecting bolts in the bottom of both pieces. A pair of L-shaped concrete block pieces with holes drilled in them are combined and connected in a staggered manner with their bottom surfaces stacked one on top of the other and one of them relatively shifted in the longitudinal direction.
It is designed to form a glyph-shaped groove.

(Example) The configuration of the present invention will be described in detail below based on an example shown in the drawings.

FIG. 1 shows a perspective view of an embodiment of the concrete block for waterways according to the present invention. This concrete block 1 for waterways consists of a pair of L-shaped concrete block pieces (hereinafter abbreviated as L-shaped block pieces) 2, 3.
The bottom part 3 of one L-shaped block piece 3
By stacking the bottom part 2B of the other L-shaped block piece 2 on top of B and connecting one block piece 3 with the other block piece 2 shifted relative to the other block piece 2 in the longitudinal direction. This constitutes a groove having a substantially U-shaped cross section. L-shaped block piece 2,
The connection between the three members is carried out by attaching a connecting bolt 6 using a through hole 5 drilled in advance or immediately before the bottom portions 2B and 3B, and tightening the bolt. Also, the space between the L-shaped block pieces 2 and 3,
For example, the distance S1 between the side edge of the bottom surface 2B of one stacked L-shaped block piece and the side wall 3A of the other block piece ₃ , and the distance between the butt end faces of the L-shaped block pieces in the longitudinal direction. S ₂ is filled with a waterproofing material 7 such as mortar or sealant to prevent water from leaking from these joints, that is, between S ₁ and S ₂ . In addition, the L-shaped block pieces 2 and 3 are
By overlapping B and 3B and connecting one of them with one shifted in the longitudinal direction, the L-shaped block pieces are connected to each other in the longitudinal direction with the other L-shaped block piece of the pair interposed. The longitudinal offset of is preferably 1/2 of the total length of the L-shaped block piece.

At least one piece 2 of the L-shaped block pieces has a large number of drainage holes 4 bored in the side wall 2A. The drainage hole 4 is preferably large enough to allow water to pass through easily and prevent gravel from flowing in. Although not shown, at least the inner walls of the L-shaped block pieces 2 and 3 used for the water intake and drainage ports have guide grooves for holding partition plates (not shown) that block the flow of water. It is provided. This guide groove has side walls 2A,
It may be two stripes integrally formed with 3A or a groove formed therein. It is not necessary to provide this guide groove in all the L-shaped block pieces 2, 3, and it is also possible to incorporate this L-shaped block piece with a guide groove only in a place where it is necessary to block water. Incidentally, one or both of the pair of L-shaped block pieces 2, 3 is provided with a seat surface 9 for receiving a concrete cover 8 which is placed over the U-shaped groove formed by combining these block pieces.

It is also possible to install two sets of concrete blocks for waterways in parallel and use them as a double system. For example, as shown in FIG. 2, one L-shaped block piece 3 that does not have a drainage hole 4 has a connection bolt hole 1 that is previously or just previously drilled.
4 are connected back to back by connecting bolts 10 passing through the two L-shaped block pieces 2, which are used as central side walls, and the other L-shaped block pieces 2 forming outer walls are assembled facing each other, and the bottom parts 2B and 3B are connected to each other by connecting bolts 6. It is tightened with. At this time, the two sets of L-shaped block pieces 3, 3 that are connected back to back to form the central side wall are halved in the longitudinal direction (L-shaped block pieces 2, 3) in order to increase the joint strength against external forces from the sides. 3), but it is also possible to connect without shifting. still,
The other L-shaped block piece 2 on the outside of the L-shaped block piece 3 on the center wall has a bottom part 2 as described above.
B and 3B are overlapped and connected with displacement in the longitudinal direction. In addition, the lid 8 in the case of the above-mentioned double waterway
may be a single plate spanning both waterways, but may also be two pieces of cover material that are butted together at the mating surfaces of the L-shaped block pieces 3 on the center wall. When the lid material 8 is made of two sheets, it is also possible to use this mating surface as a boundary line. In the case of the lid 8 made of a single plate, it is sufficient to provide a line pattern, a groove, etc. in the center to indicate the boundary. In addition, when the heights of the left and right rice fields are different and there is a difference in the height of the ridge, the height of the ridge can be adjusted by shifting the central L-shaped block pieces 3 that are connected back to back in the height direction as shown by the imaginary line. It is possible to accommodate the difference.

(Function) According to the concrete block for waterways constructed as described above, various waterways such as ridge-cum-drainage ditches can be formed.

For example, when forming a double paddy field ridge drainage ditch (hereinafter also referred to as a ridge block) using the concrete block 1 for waterways of the present invention, first, a drainage ditch that is wider than the ridge block 1 is formed at the boundary that divides the paddy field 11. Then, a shallow groove is dug and a ridge block 1 is installed. This ridge block, that is, the concrete block for waterways, is made by combining a pair of L-shaped block pieces 2 and 3 with their bottom parts 2B and 3B stacked one on top of the other so as to form two U-shaped groove blocks side by side.
It is formed by arranging the block pieces 2 in a staggered manner so as to shift them relative to the other L-shaped block piece 3, and sequentially connecting them using connection bolts 6, 10, mortar 7, etc. There is a gravel layer 1 around this ridge block 1 to improve drainage.
2 is provided with a desired width so that water in or on the soil 13 can easily flow toward the ridge block 1 side.

Therefore, if a predetermined part of the waterway created by this ridge block 1, for example, a drainage port, is blocked with a partition plate (not shown) and the water in the irrigation channel is guided, it will surround the paddy field 11 through the drainage hole 4 in the side wall. Irrigation water can be supplied from the entire ridge to completely submerge it. Also,
When the partition plate is removed and the drainage grooves are communicated, surface drainage is carried out through the drainage holes 4, and water in the soil 13 also flows down into the groove bottom of the lower ridge block 1, and is completely drained. Therefore, it can be used as a dry field, and the subsequent fertilizer is highly effective and the amount of fertilizer used can be halved.

Furthermore, by using this ridge block 1 as a rail or the like, it is possible to improve the mobility by improving the farmland structure. For example, although not shown, a traveling trolley may be placed on the ridge blocks 1 on both sides extending in parallel, and a pipe for spraying pesticides may be straddled between them to allow the cart to run on the ridge blocks 1 by itself. This will enable automatic pesticide spraying in the closest position to the crops.
The amount of pesticides used can be reduced.

This concrete block for waterways can be used in a variety of ways, including as a block for ridges, as side ditches in general households, or as drainage ditches along mountains, and is not limited to the above-mentioned block for ridges.

Effects of the Invention As is clear from the above explanation, the concrete block for waterways of the present invention consists of a pair of L-shaped concrete blocks having drainage holes in the side wall of at least one side and holes for connecting bolts in the bottom of both sides. Concrete block pieces are connected in a staggered manner with their bottoms stacked one on top of the other and one side relatively shifted in the longitudinal direction to form a U-shaped groove, allowing water to freely flow in and out through the drainage hole in the side wall. At the same time, the flow of water can be blocked freely by inserting a partition plate, so it can be used as a waterway or as a boundary block.

Therefore, if you create a drainage ditch that also serves as a rice field ridge using this concrete block for waterways, water on the surface of the paddy field and in the cultivated soil can be drawn into the ditch and drained through the drainage hole in the side wall, or the water on the surface of the paddy field and Supply irrigation water to the cultivated soil, allowing for complete submergence and complete drainage.

Moreover, this concrete block for waterways is
A pair of L-shaped block pieces are faced and connected by overlapping their bottom parts, and the longitudinal block pieces are connected to each other via the other L-shaped block piece, so that the opposing L-shaped block pieces can be The joints mutually reinforce each other and are strong against vertical and horizontal displacements and loads, so even if the ground undulates or subsides, agricultural machinery or other equipment can be moved over the ridges or drainage ditches made up of the block. Even if the worker moves, the connecting part will not be damaged and water will not leak. Furthermore, the rice field ridges constructed with concrete blocks for waterways are permanent ridges in which no ridge grass grows, which saves the labor of weeding, eliminates sources of pests, and ensures the integrity of the boundaries. becomes.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the concrete block for waterways of the present invention, Fig. 2 is a cross-sectional view showing an example of the concrete block implemented as a drainage ditch for double paddy ridges, and Fig. 3 is a waterway concrete block. FIG. 2 is a perspective view of an embodiment of a pair of L-shaped block pieces constituting a concrete block for use as a drainage ditch for a double paddy field. 1... Concrete block for waterway, 2, 3...
...L-shaped block piece, 2A, 3A...Side wall of L-shaped block piece, 2B, 3B...Bottom part of L-shaped block piece, 4...Drainage hole, 5...Hole for connecting bolt, 6...
...Connection bolt, 7...Mortar/waterproofing material.

Claims (1)

[Scope of utility model registration request] A pair of L-shaped concrete block pieces, each having a drainage hole in the side wall of at least one piece and a hole for a connecting bolt in the bottom of both pieces, are stacked on top of each other with their bottom faces stacked one on top of the other and one of them is relatively shifted in the longitudinal direction. Concrete blocks for waterways are characterized in that they are combined and connected in a staggered manner to form a U-shaped groove.