JPH02282535A - Infiltrated rain water box - Google Patents

Abstract

PURPOSE:To prevent a rain water box from being clogged by dirt and improve the infiltrating capability of rain water into the ground by providing infiltrating holes at the upper section of a side wall, and installing a water collecting path with a screen and a water dividing section with a bulkhead and an orifice below a cover hole. CONSTITUTION:Multiple infiltrating holes 11a are bored at the position communicated to crusher runs 16 at the upper section of the side wall of a rain water box 11. A water collecting path 19 with a screen 21 and a water dividing section 27 with a bulkhead 31 and an orifice 27c are installed below a cover hole 18b. The water dividing section 27 is fitted so that the rain water from the water collecting path 19 is prevented from directly flowing to infiltrating holes 11a by the bulkhead 31. The dirt in water rain is removed by the screen 21, mud is dropped to the bottom from the orifice 27c. When there is a large quantity of wain water, it is infiltrated into the ground through infiltrating holes 11a. The infiltrating capability into the ground can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rainwater basin installed in a roadside gutter and communicating with a sewer pipe via an attachment pipe. More specifically, the invention relates to a rainwater basin that allows rainwater to permeate into the ground when rainfall intensity is high.

[Conventional technology] When areas that used to be farmland or wilderness become urbanized, the number of roofs and paved roads increases, making it difficult for rainfall to penetrate underground, which makes urban rainwater drainage facilities necessary. The amount of water flowing into sewer pipes and rivers will increase.

Particularly in most vehicles, the ratio of area impermeable to rainwater due to urbanization has reached 70% to 80% of the total area. For this reason, during rainfall, both the flow capacity of existing sewer pipes and the relative flow capacity of the rivers from which they are discharged decrease. Rivers that have rarely flooded in the past have recently flooded once or twice a year, causing flooding damage to houses.

Traditionally, as a measure to resolve such urban flood disasters, rainwater infiltration facilities such as infiltration rainwater basins and infiltration connecting pipes have been installed within sewer pipe facilities to improve the water retention and water retardation functions inherent in the earth. (For example, ``Planning and Design of Sewers in Pictures,'' published by Nakayama Kaido in August 1985, pp. 68-71).

In this rainwater infiltration facility, as shown in Figure 8, the L-shaped gutter 1
Two infiltration rainwater basins 2 and 3 are installed below the tank, and both phases are connected to each other by an infiltration connecting pipe 4.

5 is an infiltration connecting pipe for connecting to another remote infiltration rainwater basin. These infiltration connecting pipes 4 and 5 are composed of perforated humid pipes, porous concrete pipes, etc., and crushed stone is spread around them. An attachment pipe 6 that communicates with a sewer pipe (not shown) is connected to the rainwater basin 3. A bucket 2a with small holes is provided at the top of the rainwater basin 2 to remove large garbage, and a mud basin 2b is provided at the bottom of the bucket 2a. Furthermore, the bottom of the rainwater basin 3 is filled with gravel 3a.

The rainwater flowing into the rainwater basin 2 has garbage removed by a bucket 2a, sediment is deposited in a mud basin 2b, and only the supernatant water flows into the adjacent rainwater basin 3 through a connecting pipe 4. The inflowing rainwater passes through the gravel 3a at the bottom of the basin 3 and permeates into the ground through the hole in the infiltration connecting pipe 5. The remaining rainwater is then drained into the sewer pipe through the attached pipe 6.

[Problem to be solved by the invention] These rainwater infiltration facilities allow rainwater to infiltrate into the ground from the beginning of rain, so even if the rainfall intensity is less than the flow capacity of sewer pipes or rivers, rainwater infiltrates into the ground. I will do it. According to current statistics, the frequency of rainfall intensity that threatens to exceed the flow capacity of sewer pipes and rivers is about 10% of the total. For this reason, when all rainwater is infiltrated into the ground, regardless of the amount of rainfall, as in the past, firstly, the initial rainfall of one rainfall, which is often low in intensity, is used to create a permeable rainwater basin or The interstices between the soil particles below the infiltration connecting pipe become saturated. Secondly, because rainwater flows in frequently, there is also a large amount of garbage flowing in. Therefore, if the inside of the bucket installed at the top of the rainwater basin is not cleaned regularly, garbage will flow into the seepage area and the seepage area will become visible. It becomes easy to get clogged. Due to these factors, conventional rainwater infiltration facilities have a problem in that the ability of rainwater to infiltrate into the ground tends to decrease.

The purpose of the present invention is to provide a rainwater basin that separates rainwater so that it permeates into the ground only when the intensity of rainfall exceeds the flow capacity of sewer pipes and rivers, and prevents clogging of the infiltration mechanism for a long period of time. Our goal is to provide the following.

Another object of the present invention is to provide a rainwater basin that automatically avoids dirt and mud that enters the rainwater basin from the rainwater infiltration system, and does not reduce the infiltration function of the earth for a longer period of time.

[Means for Solving the Problems] The present inventor has proposed that a crushed stone layer (crusher run) is provided around the outside of the rainwater basin, particularly around the upper part of the rainwater basin, and that this crushed stone layer serves as the roadbed for a paved road. The present invention was completed by focusing on the fact that it has a penetration function.

The present invention relates to an infiltration rainwater basin that communicates with a sewer pipe through an attached pipe and allows rainwater to infiltrate into the ground when rainfall intensity is high. A collection channel is provided almost horizontally below the hole in the lid of the rainwater basin to collect rainwater flowing down through this hole, and a collection channel that covers this collection channel and allows garbage in the rainwater flowing down from the hole to fall to the bottom of this rainwater basin. and an orifice for discharging rainwater from the collection channel to the bottom of the rainwater basin, and when the flow rate of rainwater flowing through the collection channel is less than a predetermined flow rate, the rainwater is allowed to flow down from the orifice to the attachment pipe, and the rainwater is discharged to the bottom of the rainwater basin. a water diversion section that allows rainwater exceeding the predetermined flow rate to flow into the permeation hole when the flow rate exceeds the predetermined flow rate; and a water diversion section provided in the water diversion portion to prevent suspended matter in the rainwater exceeding the predetermined flow rate from flowing into the permeation hole. It is characterized by comprising a partition wall.

Further, below the hole of the lid, there is an upwardly sloping surface that receives and rectifies rainwater flowing down from the hole, a turning surface that is provided following this upwardly sloping surface and which turns the rectified rainwater diagonally downward, and this turning surface. A flow rectification/diverting section is provided, which includes a downwardly inclined surface that is provided following the surface and allows rainwater flowing on the surface to flow down to the attached pipe, and a part of the upper end edge of the collection channel is aligned along the downwardly inclined surface and at a predetermined angle. The collection channels may be arranged at intervals and configured to allow rainwater exceeding a predetermined flow rate to flow in when the flow rate of rainwater flowing down the downward slope exceeds a predetermined flow rate.

[Function] Rainwater flows in through the holes in the rainwater catchment cover, and garbage in the rainwater is removed by a screen and collected in a collection channel. Rainwater collected in the collection channel enters the water diversion section, where if the flow rate of rainwater is less than a predetermined flow rate, it flows out from the orifice to the sewer pipe via the attachment pipe.

On the other hand, when the flow rate of rainwater exceeds the predetermined flow rate, the rainwater exceeding the predetermined flow rate permeates into the ground through the infiltration hole. The partition wall prevents suspended matter from entering the permeation hole.

[Example] Next, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 to 4, 10 is an L-shaped side gutter, 11 is an infiltration rainwater basin, 12 is an attachment pipe, and 13 is a sewer pipe.

In this example, the rainwater basin 11 has an inner diameter of 500 mm and a depth of 90 mm.
It has an almost cylindrical shape with a diameter of 0 mm. A plurality of infiltration holes 11a each having an inner diameter of 50 mm and communicating with a crusher run 16 serving as the roadbed of the paved road 15 are bored in the side wall of the rainwater basin 11. Since these infiltration holes 11a are close to the paved surface of the road, there is no need to dig deep into the road when providing them in an existing rainwater catchment 11.

Two elongated holes 18a, 18b are provided in the lid 17 of the rainwater basin 11 in the arrangement direction of the side gutters 10, and these elongated holes 18a, 1
Below 8b, a gutter-shaped collection channel 19 made of a synthetic resin molded body and having a semicircular cross section is provided. The collection channel 19 is a long hole 18a
, collects rainwater flowing down from 18b, and connects it to water diversion section 2, which will be described later.
In this example, it has a length of about 300 mm and an opening width of about 150 mm. Both ends of the water collection channel 19 are formed in an arch shape, and bearings 19a are provided at the upper portions of both ends. A support shaft 22 of a screen 21 is installed on the bearing 19a. In addition, the screen 21
It is configured to cover the openings of the rainwater basins 9 and allow debris, such as leaves P, in the rainwater flowing down from the elongated holes 18a and 18b to fall to the bottom of the rainwater basin 11.

In this example, the screen 21 is a synthetic resin molded body,
It has a semicircular cross section, and comb teeth 21a are formed on both sides. In order to facilitate the removal of dust P, the screen 21 is configured to be swingable relative to the water collection channel 19 using the support shaft 22 as a fulcrum, and each comb tooth 21a is formed to be tapered from the root to the tip. . The length of the teeth is 50-60 mm. Also, the width of each tooth is approximately 3mm at the root and 1.5mm at the tip.
The pitch of the teeth is approximately 3 mm at the root and approximately 4.5 mm at the tip.

The collection channel 19 is removably supported by a base plate 26 and a water diversion section 27, which are attached to the side wall of the rainwater basin 11 with bolts 24 and 25, respectively. In other words, in this example, the collection channel 1
A support leg 19b is provided at one end of the support leg 19b.
Collection waterway 1! After the sealing plate 28 for watertightly sealing one end of the support leg 19b is installed on the plywood 26, the support leg 19b is installed on the plywood 26.

The water diversion section 27 is a synthetic resin molded body, and includes a semicircular water collection channel support section 27a that supports the other end of the water collection channel 19, and a water collection channel support section 27a that supports the other end of the water collection channel 19.
Rainwater inflow section 27b following the other end of 9, and this inflow section 27b
The orifice 27c provided below and this inflow portion 2
7b is partitioned by a partition wall 31 and communicates with the inflow part 27b at the bottom, and a bolt 2 is attached to the side wall of the rainwater basin 11.
5, a pair of side wall mounting portions 27e are watertightly bonded together, and a side wall opposing portion 27f is provided following the side wall mounting portions.

The height of the water collection channel support portion 27a is determined so that the bottom of the other end of the water collection channel 19 is approximately at the same level as the permeation hole 11a, and is set higher than the lower end of the partition wall 31. In addition, the orifice 27c communicates with the bottom of the rainwater basin 11, and is connected to the bottom of the rainwater basin 11.
It has an elongated outflow cross section of 100 mm. A spacer 32 is attached to the lower part of the side wall facing portion 27f with a bolt 33. The infiltration hole inflow portion 27d is formed by the partition wall 31, the side wall of the rainwater basin 11 between the side wall attachment portions 2Te, the side wall opposing portion 27f, and the spacer 32.

Next, the water diversion situation according to the rainfall intensity of the infiltrating rainwater basin 11 having such a configuration will be explained.

Rainwater reaching the rainwater basin 11 from the L-shaped gutter 10 flows through the long hole 18
It flows into the rainwater basin 11 from a and 18b and falls onto the screen 21. Rainwater flows into the collection channel 19 through the comb teeth 21a of the screen 21, and the garbage P in the rainwater easily falls to the bottom of the rainwater basin 11 with the help of the swinging of the screen 21. Rainwater that flows into the collection channel 19 and is collected is transferred to the water diversion section 27
The rainwater flows into the rainwater inflow section 27b.

If the rainwater is small to medium-sized rainfall, this inflow section 27
Rainwater is not stored in the tank b, but all rainwater flows down from the lower orifice 27c to the bottom of the rainwater catchment 11, as shown by the solid line, and flows down to the sewer pipe 13 through the attachment pipe 12.

Also, if the rainwater is large-scale rainfall, orifice 2
7c flows into the rainwater inflow section 27b, so the rainwater inflow section 27b is filled with rainwater and its water level rises. Rainwater in the rainwater inflow section 27b passes under the lower end of the partition wall 31 as shown by the broken line and flows into the infiltration hole inflow section 27d,
It permeates into the crusher run 16 through the permeation hole 11a. Floating substances, such as mud, floating in the rainwater that has entered the rainwater inflow portion 27b are blocked by the partition wall 31, and do not flow into the seepage hole 11a. Since the crusher run 16 has an extremely high rainwater permeation function, rainwater flowing out from the permeation hole 11a permeates into the ground very easily.

Although not shown, if the diameter of the orifice 27c is adjustable, the degree of rainwater permeation from the permeation hole 11a can be easily changed.

Further, when mud accumulates at the bottom of the rainwater basin 11, the collection channel 19 can be removed together with the screen 21, and the mud can be removed and the bottom of the rainwater basin 11 cleaned as before.

5 to 7 show a rainwater basin according to another embodiment of the present invention, in which the same parts as in the previous embodiment are designated by the same reference numerals. In this embodiment, a rectifying and diverting part 40, which is a cylinder whose cross section resembles the external shape of an inverted eggplant or peach, is provided substantially horizontally below the elongated hole 18b on the center side of the road 15 of the lid 17. This rectifying and turning section 40 is a synthetic resin molded body, and mainly consists of the long holes 18
The target is rainwater flowing down from b. This rectification turning section 40
An upwardly inclined surface 40a that receives and rectifies rainwater, a turning surface 40b that is provided following this upwardly inclined surface 40a and that diverts the rectified rainwater diagonally downward, and a turning surface 40b that is provided following this turning surface 40b and that rainwater flows onto the surface. A pair of downwardly inclined surfaces 40c for allowing the flow to flow down into the mounting pipe 12 are provided symmetrically. By approximating the cross section of the flow rectification section 40 to the outer shape of an eggplant or peach, when the rainwater flowing in from the elongated hole 18b is mixed with garbage, the garbage flows through the upward slope 40a before going to the downward slope 40c. It rolls and is easily separated from the rectification turning section 40.

A pair of synthetic resin water collection channels 19 each having a U-shaped cross section are arranged on the sides of the left and right downwardly inclined surfaces 40c. A sealing plate 28 is attached to one end of the pair of water collection channels 19, and a mounting plate 41 is attached to the other end. One end of the water collection channel 19 is installed on the plywood 26, and the other end is supported by the water collection channel support portion 27a of the water diversion section 27. Similar to the embodiment described above, the pair of water collection channels 19 are constructed so that they can be removed from the plywood 26 and the support part 27a together with the flow rectification/diversion section 40, and each other end of the collection channels 19 is connected to the rainwater inflow section of the water diversion section 27. 27b. Since the amount of rainwater flowing into the water collection channel 19 is reduced compared to the embodiment described above, the orifice 27c of the water diversion section 27 has an elongated outflow cross-sectional area of 5 mm x 100 mm, which is half that of the embodiment described above.

The pair of water collection channels 19 have a downwardly inclined surface 4 at their inner upper edge.
0c and at a predetermined interval, and are configured to allow rainwater exceeding a predetermined flow rate to flow in when the flow rate of rainwater flowing down the downward slope 40c exceeds a predetermined flow rate. In this example, as shown in the enlarged view of FIG.
An adjusting plate 42 having an elongated hole 42a along the entire length of the inner upper edge of the adjusting plate 42 is fixed with bolts 43. If the bolt 43 is loosened within the range of the elongated hole 42a, the height of the adjustment plate 42, that is, the distance t between the upper end of the adjustment plate 42 and the downwardly inclined surface 40c, can be reduced to t.
, to t2. In this example, t
, is 10mm5t 2 is 20mm. In order to maintain this predetermined interval over the entire length of the collection channel 19, the lower end of the flow rectifying section 40 and the lower end of the collection channel 19 are connected at several locations by reinforcing legs 44.

Further, in this example, a pair of screens 21 are respectively disposed above the water collection channel 19, and both ends of each support shaft 22 penetrate through the sealing plate 28 and the mounting plate 41 and are fixed thereto.

In such a permeable rainwater basin 11, most of the rainwater flowing in from the long hole 18a on the side gutter side of the road 15 falls to the bottom of the rainwater basin 11. When the amount of rainfall increases and the amount of rainwater flowing into the side gutter 10 increases, the rainwater comes to flow through the long hole 18b on the center side of the road 15.

The water flows into the rainwater basin 11 from this elongated hole 18b and flows into the rectification turning section 40.
Rainwater that falls on the top is rectified by the upwardly inclined surface 40a. Garbage flowing down together with rainwater can be easily diverted to the upwardly inclined surface 40 due to the characteristic outer shape of the rectifying and diverting portion 40 of this embodiment.
A or the turning surface 40b separates from the rainwater. Even so, the screen 21 removes the garbage that flows with the rainwater. The rainwater from which the garbage has been removed is turned obliquely downward at the turning surface 40b and flows down the surface of the downwardly inclined surface 40c.

When the rainwater is small-scale rainfall and the thickness of the water flow on the downward slope 40C is smaller than the interval t, it flows down from the lower end of the downward slope 40c to the bottom of the rainwater basin 11,
It flows down through the attachment pipe 12 to the sewer pipe 13.

In addition, the rainwater is medium-sized rainfall, and the downward slope 40c
If the thickness of the water flow in
It separates from the water, flows into the water collection channel 19, and flows into the water diversion section 27. Since the amount of rainwater flowing in here is small, this inflow part 2Tb
Rainwater is not stored inside the tank, and all rainwater is directed to the lower orifice 2.
7c and the lower end of the downwardly inclined surface 40c, it flows down to the bottom of the rainwater catchment 11, passes through the attachment pipe 12, and flows down to the sewer pipe 13.

Furthermore, the rainwater is a large-scale rainfall, and the downward slope 40c
When the thickness of the water flow is greater than the interval t and the amount of rainfall is greater than the drainage capacity of the orifice 27c, the inlet portion 27b is filled with rainwater flowing from the collection channel 19, and its water level rises. As a result, similarly to the embodiment described above, rainwater in the rainwater inflow section 27b passes through the lower end of the partition wall 31 as shown by the broken line, flows into the infiltration hole inflow section 27d, and infiltrates into the crusher run 16 through the infiltration hole 11a.

Similarly to the embodiment described above, when mud accumulates at the bottom of the rainwater basin 11, the screen 21 and the water collection channel 19 as well as the flow rectifying section 40 are removed, the mud is removed as before, and the rainwater basin 11 is removed.
The bottom of the can be cleaned.

Note that the numerical values and materials of each component shown in the above example are merely examples, and the present invention is not limited to these.

Further, although an example has been shown in which the elongated holes of the lid 17 are provided in the arrangement direction of the side gutters 10, if the elongated holes are provided in a direction perpendicular to this arrangement direction, the collection channel in the above example is By installing in the direction, the object of the present invention can be achieved.

Furthermore, although we have shown an example where the collection channel has one-way flow, - in areas with heavy rainfall, water diversion sections and infiltration holes should be provided at both ends of the collection channel so that the rainwater collected in the collection channel will flow to both ends. You can also do that.

[Effects of the Invention] As described above, according to the present invention, when rainfall exceeds the drainage capacity of the orifice, rainwater is discharged from the seepage hole provided in the side wall of the rainwater basin, so that it is possible to drain water from the sewer pipe or drain. Rainwater can infiltrate into the ground only when the rainfall intensity exceeds the flow capacity of the river, which reduces the frequency of rainwater infiltration into the ground and the amount of rainwater that infiltrates, improving the infiltration capacity of the earth. can.

In particular, even if the rainwater contains garbage and mud, the garbage is separated from the rainwater by a screen and falls to the bottom of the rainwater catchment, and the mud falls to the bottom of the rainwater catchment from the orifice of the water diversion part.
Neither reaches the penetration pore.

Therefore, the permeation hole and the crusher run outside the permeation hole are not clogged with dirt or mud over a long period of time, and the ability of the present invention to permeate rainwater into the ground can be maintained at a high level for a longer period of time.

If the screen is made swingable with respect to the collection channel, it will vibrate due to fallen debris, further improving its ability to remove debris from rainwater.

By making the diameter of the orifice or the height of the adjustment plate of the present invention adjustable, the degree of infiltration of rainwater can be easily changed.

In the case where the seepage holes are provided in the upper part of the side wall of the rainwater catchment near the road surface and communicated with the crusher run, the seepage rainwater catchment of the present invention can be constructed by simply digging shallowly in the road, resulting in low construction costs.

By removably providing a screen, a collection channel, a flow rectification section, etc. in a rainwater basin, it is possible to easily clean the mud basin at the bottom of the rainwater basin.

Furthermore, if the infiltration rainwater basin of the present invention is connected to another infiltration rainwater basin using a conventional infiltration connection pipe made of a perforated hump pipe or a porous concrete pipe, a larger amount of rainwater can permeate into the ground, and It is possible to make more effective use of the water retention and water retardation functions that water naturally possesses.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view taken along the line A-A in FIG. 2, showing the structure of a rainwater basin according to an embodiment of the present invention. FIG. 2 is a sectional view taken along the line B-B in FIG. 1. Figure 3 is a perspective view of the main parts of the sewerage facility, including the infiltration rainwater basin. Figure 4 is an exploded perspective view of the main parts of the rainwater basin. FIG. 5 is a sectional view taken along the line C--C in FIG. 6 showing the structure of another embodiment of the infiltration rainwater basin of the present invention. FIG. 6 is a sectional view taken along the line DD in FIG. 5. Figure 7 is a perspective view of the main parts of the infiltration rainwater basin. FIG. 8 is a schematic perspective view of a conventional seepage rainwater basin. 11: Infiltration rainwater basin, 11a: Infiltration hole, 12: Attachment pipe, 13: Sewer pipe, 15: Paved road, 16: Crusher run, 17: Rainwater basin cover, 18a, 18b: Long hole in the cover, 19: Collection Water channel, 21 Niclean, 27: Water diversion section, 27C Niorifice, 31: Partition wall, 40: Rectification turning section, 40a: Upward slope, 40b: Turning surface, 40C: Downward slope, 42: Adjustment plate. L, B Figure-A Figure ``-〇L, C Figure Figure

Claims (1)

[Scope of Claims] 1) An infiltration rainwater basin that communicates with a sewer pipe via an attached pipe and allows rainwater to permeate into the ground during periods of high rainfall intensity, the rainwater basin being perforated in the side wall of the rainwater basin. An infiltration hole, a collection channel installed almost horizontally below the hole in the lid of this rainwater basin to collect rainwater flowing down from this hole, and a collection channel that covers this collection channel to collect garbage in the rainwater flowing down from the hole. It has a screen that drops to the bottom of the basin, and an orifice that discharges rainwater from this collection channel to the bottom of this rainwater basin, and when the flow rate of rainwater flowing through this collection channel is less than a predetermined flow rate, the rainwater is discharged from the orifice to the attached pipe. a water diversion section that allows rainwater that exceeds the predetermined flow rate to flow into the infiltration hole when the predetermined flow rate is exceeded; A permeable rainwater basin characterized by comprising a partition wall that prevents the inflow of water. 2) The infiltration rainwater basin according to claim 1, wherein the infiltration hole communicates with a crusher run provided around the upper outer side of the side wall. 3) The infiltration rainwater basin according to claim 1, wherein said screen and said collection channel are removably attached to a side wall. 4) An upwardly sloping surface below the hole in the lid that receives and rectifies rainwater flowing down from the hole, a turning surface that is provided following the upwardly sloping surface and which diverts the rectified rainwater diagonally downward, and this turning surface. A rectifying/diverting section is provided with a downwardly inclined surface that is provided following the surface and allows rainwater flowing on the surface to flow down to the attached pipe, and the collecting channel has a part of its upper edge along the downwardly inclined surface and 2. The percolation rainwater basin according to claim 1, which is arranged at a predetermined interval and configured to allow rainwater exceeding a predetermined flow rate to flow in when the flow rate of rainwater flowing down the downward slope exceeds a predetermined flow rate. 5) The permeable rainwater basin according to claim 4, wherein the flow rectification/direction section is a cylindrical body whose cross section approximates the external shape of an inverted eggplant or peach. 6) The infiltration rainwater basin according to claim 4, wherein the flow rectification/diversion section is removably attached to a side wall integrally with the collection channel. 7) The seepage rainwater basin according to claim 4, wherein the predetermined interval can be adjusted by moving the upper end edge of the water collection channel in the vertical direction.