JP2756244B2 - Seepage measure and seepage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infiltration basin for infiltrating rainwater and the like into the ground and a structure of an infiltration tank.

[0002]

2. Description of the Related Art In order to infiltrate rainwater, drainage and the like into the ground, a preformed concrete penetration pit may be buried near the ground surface. The seepage measure is a cylindrical shape having a circular or square cross section and extending in the vertical direction, and often has an open bottom. The infiltration basin is generally installed after excavating the ground with a stone having a large diameter, such as a stony stone, for efficiently infiltrating water. In order to improve the permeability of the seepage measure, a hole may be provided in the side wall of the seepage measure, or the side wall may be formed of permeable concrete.

[0003]

The diameter of the hole provided on the side wall of the seepage measure is limited to a small diameter in order to prevent backfill soil, sand or gravel from entering. For this reason, if dust or dirt is mixed in the rainwater or drainage introduced into the infiltration basin, these contaminants block the holes provided in the side walls. For this reason, the amount that permeates through the side wall of the permeation measure gradually decreases. The same applies to porous permeable concrete. Although it is possible to increase the diameter of the hole in the side wall to prevent blockage due to dust or the like, it is necessary to raise a large-diameter stone around the infiltration basin to close the large-diameter hole. In such an infiltration basin, the time required for installation is increased, and the stone is buried near the surface of the ground.

[0004] By providing a vertically long slot on the side wall of the penetration chamber, it is possible to prevent the penetration hole from being clogged. However, in order to increase the amount of seepage water from the side wall, it is necessary to increase the opening ratio of the side wall, and if many long holes are provided, the strength of concrete will be insufficient, and the long holes will be isolated during manufacturing, transportation and construction. There are problems such as missing parts.

In view of the above, an object of the present invention is to provide a penetration chamber which can maintain the cross-sectional strength even if a large number of long holes are provided and which is less obstructed by dust and the like.

[0006]

In the infiltration basin according to the present invention, if the infiltration hole formed in the side wall is lengthened in the vertical direction, dust introduced into the infiltration basin together with rainwater or the like is reduced to a water level. As it falls, it falls along the long hole provided in the side wall, so that it is possible to prevent the long hole from being clogged.
In addition, the long hole, even when rainwater is discharged into the seepage basin,
Garbage discharged to the side wall along with the rainwater travels along the long hole together with the rainwater and falls to the bottom. Therefore, even in such a case, the obstruction of the long hole provided in the side wall can be suppressed. in this way,
The permeation tub provided with the long holes can efficiently and stably penetrate rainwater or the like through the side wall, so that the permeation tub can be downsized.

Further, in order to increase the opening area, it is possible to form a long hole in the side wall continuously from the top to the bottom of the side wall. However, in the infiltration basin of the present invention, in order to improve the strength of the side wall. A plurality of long holes are provided in the side wall, these long holes are arranged at intervals in the vertical direction, and furthermore, they are arranged in parallel in the horizontal direction. That is, in the infiltration basin according to the present invention having a concrete side wall extending vertically in a cylindrical shape, at least a portion of the side wall has a plurality of vertically extending long holes, and these long holes are provided. The holes are arranged at intervals in the vertical direction, and are arranged in parallel in the horizontal direction.

[0008] In the infiltration basin of the present invention, a horizontally continuous wall surface is obtained between a plurality of long holes, so that the cross section can be strengthened and a reinforcing bar can be embedded. That is, in the infiltration basin of the present invention, a plurality of long holes provided in the side wall are arranged at predetermined intervals in the vertical direction, and are arranged in parallel in the horizontal direction. A continuous cross section in the direction can be formed on the side wall, and a horizontal reinforcing bar can be inserted into the side wall. A horizontally continuous wall surface is formed between the long holes, so that the cross section can be reinforced and a reinforcing bar can be embedded.

On the other hand, to increase the amount of water permeating from the side wall,
It is sufficient to increase the number of slots and increase the area. However, in order to maintain the strength of the side wall, it is necessary to provide a certain distance between the slots. In order to increase the number while maintaining the interval between the long holes, it is conceivable to arrange the long holes in a staggered manner. However, if they are arranged in a zigzag pattern, it will not be possible to obtain a continuous section of concrete in the horizontal direction or the like, and the strength will be reduced because rebar cannot be inserted. Therefore, in the present invention, the side walls are reinforced by forming them with fiber reinforced concrete such as GRC so that a plurality of long holes can be arranged in a staggered manner on the side walls. Thereby, it is possible to realize a permeation basin having a high permeability and a sufficient strength, and having less blockage. Further, since the fiber reinforced concrete is used, the wall thickness of the side wall can be made thinner than that of the conventional permeation basin, and the perforated basin can be reduced in weight because a long hole is formed in the side wall. Accordingly, transportation costs can be reduced, and construction on site can be facilitated.

In order to efficiently discharge dust from the elongated hole, it is also effective to form the elongated hole downward. This is because, even when there is a large amount of dust, the possibility that the lower part of the long hole is clogged with dust can be reduced.

Furthermore, when the amount of water flowing into the infiltration basin is large, or when the permeable layer is deep, it is necessary to form a deep infiltration tank. Although a long infiltration basin may be manufactured by custom order, it is easier and inexpensive to form a permeation tank having a predetermined depth by stacking a plurality of the above-described infiltration basins. The labor and cost involved in transportation are also low. Since the infiltration basin according to the present invention is provided with a long hole in the side wall, the side wall can be easily cut to a predetermined length. Therefore, when adjusting the depth of the permeation layer by stacking a plurality of permeation cells, a permeation cell processed to an appropriate length at a site or the like is superimposed on a permeation cell of a specified length, and the depth suitable for each site is adjusted. The infiltration tank can be easily configured. In particular, since the penetration wall made of fiber-reinforced concrete can have a reduced wall thickness, it is easy to cut it in order to adjust the length of the side wall.

Further, if a water-permeable dust receiving means such as a metal or resin net is installed on the bottom of the infiltration basin or the infiltration tank, dust discharged together with rainwater by the dust receiving means can be removed. Collected. Since the infiltration basin or the infiltration tank according to the present invention is provided with a long hole, dust is less likely to accumulate on the side wall. Therefore, the performance of the infiltration basin and the infiltration tank can be easily maintained by installing such dust receiving means on the bottom surface and periodically carrying out and cleaning.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a seepage measure provided with a long hole. The infiltration basin 1 has a cylindrical shape extending in the vertical direction, and has a substantially square cross section. Out of the four side walls 2, 3, 4, and 5, a plurality of elongated holes 10 extending in the vertical direction are formed in each of the three side walls 2, 3, and 4. The remaining side wall 5 is formed with a substantially circular opening 11 in which a pipe for guiding rainwater is installed. The bottom 6 of the seepage measure 1 is open. The upper end 7 of the infiltration basin 1 is also open, and a slightly widened edge 8 is formed around the upper end 7 and a lid hook 9 is formed inside the edge 8.

FIG. 2 is a sectional view showing a state in which the seepage measure 1 of the present embodiment is installed. After excavating the ground 20, a stone having a large diameter such as a stray stone is laid, and the infiltration basin 1 is placed thereon. A drain pipe 25 connected to a rain gutter or the like is connected to the opening 11 formed in the side wall 5, and the surroundings of the side walls 2 to 5 are gravel,
Alternatively, it is backfilled with crushed stone 21 and its surroundings are backfilled with garden soil 22 or the like. On the upper end 7, a concrete lid 26 is set.

In the infiltration basin 1 of this embodiment, the rainfall is large and the bottom 6
If only the permeation treatment cannot be performed, the water level in the permeation measure 1 rises, and the rainwater permeates the ground through the elongated holes 10 provided in the side walls 2 to 4. If the hole provided on the side wall is square or circular as in a conventional infiltration basin, dust floating on the water surface rising when rainwater passes through the side wall is clogged in the hole on the side wall. Therefore, if the number of times of heavy rainfall continues, the amount of permeation from the side wall gradually decreases. On the other hand, in the infiltration basin 1 in which the elongated hole 10 is formed, the dust in the elongated hole 10 falls along the elongated hole 10 in the vertical direction as the water level decreases. There is little clogging.

When rainwater or the like is rapidly discharged from the drain pipe 25, water is applied to the side walls 2 to 4, and the holes formed in the side walls may be clogged by soil or dust mixed in the rainwater or the like. However, in the infiltration basin 1 of this example, dust or soil flows along with rainwater flowing through the elongated hole 10 extending in the vertical direction, so that the elongated hole 10 is hardly clogged.

As described above, in the seepage measure 1 of this embodiment,
By making the hole formed in the side wall vertically long in the vertical direction, it is possible to prevent clogging by foreign substances such as dust, so that it is possible to prevent a reduction in the amount of permeation treatment of rainwater. In addition, slot 10
Is narrow and formed in a vertical slit shape, so that the crushed stone 21 or the gravel backfilling the periphery of the side wall does not enter the inside of the infiltration basin 1. Therefore, there is no possibility that the ground around the infiltration basin 1 is depressed or the crushed stone that has entered the infiltration basin 1 does not lower the permeability of the bottom surface.

FIG. 3 shows an embodiment of a seepage measure according to the present invention. The infiltration basin 31 of the present example has three elongated holes 10a, 10b extending in the vertical direction intermittently in the side walls 2 to 4 in the vertical direction.
And 10c are formed. In addition, a plurality of long holes 10a
Are arranged in parallel in the horizontal direction, and the slots 10b and 1
The same applies to 0c.

Since these long holes 10a to 10c are long holes in the vertical direction, there is little blockage by dust and the like as in the case of the infiltration chamber 1 shown in FIG. Further, the elongated holes 10a to 10a of this example
“c” is formed in a shape that is wider at the bottom. Therefore,
Even if a lot of dust flows from the upper part of the slot 10, since the lower part of the slot is larger than the upper part, the dust does not clog the lower part of the slot and smoothly goes to the bottom. run down. In this way, by providing the elongated hole whose lower portion is widened, it is possible to prevent blockage even when there is much dust.

Further, in the infiltration basin 31 of this embodiment, since the long hole 10 is divided in the vertical direction, the horizontally continuous region 15 between the long holes 10a and 10b and between the long holes 10b and 10c is formed. Can be formed. Therefore, the strength of the basin 1 in the horizontal direction can be enhanced by the region 15. If the concrete forming the region 15 is made thicker, it can be considered as a reinforcing beam, and a reinforcing bar can be buried in the region 15 to reinforce it. The vertical direction is the long hole 10
Since the wall surfaces are continuous along a to 10c, the strength can be maintained sufficiently high, and it is also possible to embed a reinforcing bar along the long holes 10a to 10c.

FIG. 4 shows a state in which two permeation tanks 31 are vertically stacked to form a permeation tank 50. In this example, after excavation, first, a split stone or a wild stone 20 is laid. The infiltration basin 31a is installed thereon, and the infiltration basin 31b is installed on the lid hook 9 thereof. Further, the length of the upper penetration basin 31b is reduced by cutting a lower portion from the long hole 10c. The two penetration chambers 31a and 31b are vertically overlapped to form a penetration tank 50 having a predetermined depth. When forming a deeper penetration tank, two or more penetration tanks may be stacked vertically. In the case of forming a permeation tank that is slightly shallower than the permeation tank 50, for example, a portion below the long hole 10b of the permeation chamber 31b may be cut and then overlapped with the permeation chamber 31a. In this way, using a plurality of penetration pits of a specified length,
A permeation tank of a depth suitable for the construction site can be easily configured. In particular, the permeation basin of this example provided with a long hole is suitable for depth adjustment because its side wall can be cut relatively easily. In addition, by using one infiltration basin whose side wall is cut, a shallow infiltration tank having a specified size or less can be easily configured.

Also, on the bottom of the infiltration tank 50, there are
A mesh basket 60 made of stainless steel is placed on the top of the mesh. This mesh basket 60 is provided with a handle 61,
The jig is inserted from the open end 7 of FIG. 3A, and the net 61 is taken out of the infiltration tank 50 by grasping and raising the handle 61. Therefore, the garbage that has flowed in along with the rainwater accumulates in the net basket 60 at the bottom without clogging the long hole of the side wall. Can be maintained. Of course, the net basket may be made of a resin such as plastic, or of course, may be replaced with a tray-like shape having a plurality of holes.

FIG. 5 shows a different embodiment of the seepage measure according to the present invention. The infiltration basin 41 of the present example has three elongated holes 10a to 10c vertically interrupted in the side walls 2 to 4 and vertically elongated two holes 12a and 12 interrupted two vertically.
b. Slots 10a to 10c and Slot 12
a and 12b are mutually arranged in the horizontal direction, and in the vertical direction, the long hole 12a is disposed between the long holes 10a and 10b, and the long hole 12b is disposed between the long holes 10b and 10c. Accordingly, elongated holes extending in the vertical direction are arranged in a zigzag pattern on the entire side wall.

In order to increase the amount of permeated water from the side wall, it is necessary to increase the opening ratio of the side wall. However, if the horizontal distance between the long holes 10 is too small, the strength of the concrete is insufficient, and a portion for isolating the long holes 10 during manufacturing, transportation, and construction is missing. Therefore, in the present example, the number of the elongated holes is increased while maintaining the horizontal distance between the elongated holes to some extent by arranging the elongated holes 10 and 12 in a staggered manner. Also,
Since the elongated holes 10 and 12 are arranged in a staggered manner, the vertical and horizontal cross-sectional areas of the side walls are insufficient, and there is a concern that the strength may be reduced. In this example, fiber reinforcement such as GRC mixed with glass fibers is used. Infiltration measure 41 using concrete
Is formed.

Therefore, the penetration pit 41 of this embodiment can form a large number of long holes extending in the vertical direction on the side wall, so that a large amount of permeation from the side wall can be maintained for a long time. Further, since fiber-reinforced concrete is used, sufficient strength can be ensured even if the wall thickness is reduced. Further, since a number of long holes are formed in the side wall, the penetration pit can be significantly reduced in weight. Therefore, the labor of the worker involved in transporting and constructing the seepage measure can be reduced.

In the above example, a long hole is formed in the three side walls, but it is also possible to form a long hole in the remaining side wall where the circular opening 11 is formed. In addition, the number and area of the long holes may be determined in consideration of the expected penetration amount, the load applied to the basin, and the like.
It is also possible to form only on the surface. Further, the installation of the drain pipe is not limited to one side wall, and may be set to another side wall, and a plurality of pipes may be installed on one side wall. The infiltration measure may of course be a cylindrical measure. Further, the infiltration basin is not limited to a household stormwater infiltration basin, but may be applied to household wastewater infiltration basins or a basin for intensively permeating rainwater.

[0028]

As described above, in the infiltration basin according to the present invention, by forming the elongated hole extending in the vertical direction on the side wall, clogging of the elongated hole by foreign matters such as dust can be suppressed, and the penetration hole can be extended. High permeation rate can be secured over a wide area. Furthermore, by arranging a plurality of long holes with a gap in the vertical direction and arranging them in parallel in the horizontal direction, it provides a small size, high penetration amount, sufficiently high strength, and a stable performance with a stable performance. it can. Since such an infiltration basin can be constructed in the same manner as in the past, there is no increase in the number of man-hours of the workers, and the burial place is not restricted more than before. Furthermore, by using fiber reinforced concrete, it is possible to provide a lighter penetration pit having a larger penetration amount.

By forming the elongated hole to have a shape extending downward, dust clogging can be further suppressed. In addition, a permeation tank having an appropriate depth according to the site can be easily configured by using a plurality of the above-described permeation pits formed with specified dimensions.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a seepage measure provided with a long hole.

FIG. 2 is a cross-sectional view showing a state where the seepage measure shown in FIG. 1 is installed.

FIG. 3 is a perspective view showing an outline of a seepage measure according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a state in which a deep permeation tank is configured using the permeation measure shown in FIG.

FIG. 5 is a perspective view showing an outline of a seepage measure according to another embodiment of the present invention.

Claims (6)

(57) [Claims] 1. An infiltration basin having a concrete side wall extending vertically in a cylindrical shape, wherein at least a part of the side wall has a plurality of vertically extending long holes, and the long holes are vertically extending. Characterized by being spaced apart from each other and arranged in parallel in the horizontal direction. 2. An infiltration basin having a concrete side wall extending vertically in a cylindrical shape, wherein the side wall is made of fiber reinforced concrete and has a plurality of vertically elongated holes in at least a part thereof. A penetrating basin characterized in that these long holes are arranged in a staggered manner. 3. The infiltration basin according to claim 1, wherein the elongated hole extends downward. 4. A permeation tank comprising two or more permeation chambers according to claim 1 stacked in a vertical direction. 5. An infiltration tank comprising the infiltration basin according to any one of claims 1 to 3 and a transportable permeable dust receiving means installed at the bottom thereof. 6. A permeation section in which two or more permeation pits according to any one of claims 1 to 3 are vertically stacked, and a transportable permeable dust receiving means installed at the bottom of the permeation section. A permeation tank characterized by having: