JPH0139772Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a U-shaped drainage ditch that is buried in the ground and allows water contained in the surrounding ground to permeate and drain into the drainage channel. .

[Conventional technology and its issues]

As is well known, in rice cultivation, there are times when water is needed and times when it is not, so cultivated land for paddy fields is required to have good drainage even when water is not needed. Therefore, in paddy fields with poor drainage due to soil quality, it is necessary to proactively drain the water contained in the ground.

Conventionally, drainage holes for attaching filter materials to side walls have been provided as U-shaped grooves for draining water in the ground in cultivated land, etc., and filter materials attached to these drainage holes have been provided on the outer surface of the side walls. A concrete gutter body is known in which a connecting filter material mounting portion is provided for connecting the filter members to each other (Utility Model Application Publication No. 53-21736).

However, in this drainage gutter body, each drainage hole opened in the side wall is connected by a horizontally long connecting filter material, and the water absorbed by the connecting filter material outside the side wall is discharged through each individual drainage hole. Therefore, even if the connecting filter material absorbs and retains water in the middle part of each drainage hole, the water absorbed by the filter material is transmitted laterally until it flows out in the direction of the drainage hole. The drawback is that it takes time to drain the water, and it is difficult to drain the water efficiently.

[Means to solve the problem]

This invention solves the above-mentioned problems with conventional U-shaped drainage ditches, and effectively directs all water in the ground that comes into contact with the outer surface of the U-shaped groove side wall toward the respective water holes provided on the outer surface. The purpose of the present invention is to provide a U-shaped drainage groove that allows drainage to flow efficiently.

As a specific means for achieving the above object, the present invention has a structure in which the outer surfaces of both side walls are provided with a plurality of partition surfaces spaced at equal intervals along the length of the side walls at the lower part of the outer surfaces. The upper end of each partition surface is made into a chevron-shaped introduction slope at approximately the middle of the height of the side wall, and a water passage hole is opened between each partition surface. A recess is provided around the water hole between the surfaces, and a filter that blocks earth and sand particles and allows only water to pass through is fitted and fixed in the recess on the front surface of each water hole. It is something.

[Effect]

In the U-shaped drainage groove of this invention, the outer surface of the side wall is recessed, and a plurality of partition surfaces each having a chevron-shaped introduction slope at the upper end are provided at equal intervals, and a drainage hole is provided between each partition surface. Since the water holes have been opened, water that comes into contact with the outer surface of the side wall above each water hole is forced to flow along the slope at the top of each partition surface and is efficiently guided to the water hole below. It is discharged through the water hole.

〔Example〕

Next, an embodiment of the drainage U-shaped groove according to the present invention will be explained with reference to the drawings. Fig. 1 shows the drainage U-shaped groove according to the present invention.
FIG. 2 is a perspective view of the groove, and FIG. 2 is a cross-sectional view. As shown in Fig. 1, this U-shaped groove has a bottom surface 1 and both side walls 2, 2 integrally formed of concrete, like a general-purpose U-shaped groove, and each U-shaped groove is They are buried in trenches that are continuous with each other and are excavated in the ground 9. This U-shaped groove has a plurality of water holes 3 formed below both side walls 2, 2 at intervals along the length direction of the side walls 2. It is desirable that these water holes 3 have a vertically elongated shape so that they can receive and discharge as much water as possible from the ground distributed in the height direction of the side wall 2.

The outer surfaces of the side walls 2, 2 are provided with a plurality of partition surfaces 7 arranged at equal intervals along the length direction of the side walls 2 at the lateral portions of the water passage hole 3 in the peripheral and lower portions of the outer surfaces. A recess 5 is formed so that the wall thickness is removed so that the wall is left behind. The upper ends of these partition surfaces 7 are located approximately in the middle of the height of the side wall 2, and the upper ends of the partition surfaces 7 are such that moisture in the ground in contact with the side wall recessed surface 5 is removed from each partition surface. It has a chevron-shaped introduction slope 8 that directs the water in the direction of the water passage hole 3 opened on the side of the water passage hole 7 .

Further, around each water passage hole 3 between the partition surfaces 7, there is provided a recessed part 4 in which a portion having a larger area than the water passage hole 3 is recessed deeper than the recessed surface 5. A filter 6 that blocks the outside of the water passage hole 3 is fitted and fixed in each of these concave portions 4 via an adhesive. These filters 6 are made of, for example, a felt-like mat formed by entangling and fusing synthetic resin fibers, and have corrosion resistance and are designed to reliably block earth and sand particles and allow only moisture to pass through. It has the following characteristics.

〔effect〕

In the drainage U-shaped groove according to this invention, the outer sides of both side walls 2 are recessed as described above, and a plurality of partition surfaces 7 having chevron-shaped slopes 8 at the upper ends are provided at the lower part of the outer side walls 2. They are formed so as to be provided at equal intervals along the length direction, and the water passage holes 3 blocked by the filter 6 are provided between each of these partition surfaces 7.
As shown in FIG. 2, among the moisture contained in the ground 9 that is in contact with the outer surfaces of both side walls 2, the moisture located at the height of the filter 6 first passes through the filter 6 and flows from the water passage hole 3 to the bottom surface of the trench. It is filtered and discharged inside.

Further, the water in contact with the outer surface of the side wall in the upper part of the filter 6 is removed as the water located at the height of the filter 6 is discharged through the water passage hole 3.
The water flows downward toward the filter 6, but at that time, the upper end of the partition surface 7 between each water passage hole 3 forms a chevron-shaped slope 8.
Therefore, the water on each partition surface 7 is distributed to the left and right by the slope 8, flows down toward the filter 6, and is properly discharged from the filter 6 through the water passage hole 3. Therefore, even if the water holes 3 are provided at intervals, the water in a wide range of contact with the outer surface of the side wall can be efficiently discharged through the water holes 3 without staying in the outer side portion of the side wall. It has this effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the drainage U-shaped groove according to the present invention, and FIG. 2 is a sectional view taken along the line - in FIG. 1 in a state of use. In the figure, 1... bottom surface, 2... side wall, 3...
Water hole, 4... Concave portion, 5... Concave surface, 6... Filter, 7... Partition surface, 8... Introductory slope.

Claims (1)

[Scope of utility model registration request] The outer surfaces of both side walls are recessed so that a plurality of partition surfaces are left at equal intervals along the length of the side wall in the lower part of the outer surface, and the upper end of each partition surface is connected to the side wall. A chevron-shaped introduction slope is provided at approximately the middle of the height of each partition, water holes are provided between each partition surface, and a recess is provided around the water hole between each partition surface, respectively. A concrete U-shaped drainage groove formed by fitting and fixing a filter that blocks earth and sand particles and allows only water to pass through, in the recessed part in front of the water passage hole.