JP3362731B2 - How to return water to the river - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for returning water to a river.

[0002]

2. Description of the Related Art In recent years, since the ground surface is covered with asphalt or concrete, a large amount of rainwater that has landed on the ground directly flows into a river, and the amount of water in the river increases rapidly at one time, which poses a risk of flooding. On the other hand, since the ground surface is covered with asphalt and concrete as described above, the amount of rainwater that penetrates underground is decreasing, and the function of maintaining groundwater volume by gradually flowing into the river is becoming less and less common. Is the current situation.

As described above, rivers in recent years are at risk of flooding when they rain, and if they do not rain, the amount of water in the rivers will decrease and there will be problems from the viewpoint of conservation of the natural environment and conservation of water resources in the rivers. there were.

[0004] Further, although the wastewater such as domestic wastewater and industrial wastewater is treated by the wastewater treatment equipment and the treated water is discharged directly to the river, when the wastewater is treated by the wastewater treatment equipment, it may be discharged to the river. There is a problem that it takes treatment time and cost to purify until it reaches the limit, and the standard of water quality that can be discharged into the river is tentatively set, but in general, the treatment time and cost are as described above. Therefore, it is the present condition that the water quality that far exceeds the standard is not treated, and the water quality of the river cannot be improved by discharging the treated water, and the natural environment of the river is better than the present condition. I couldn't.

[0005]

The present invention has been made in view of the above points, and stabilizes the amount of water in a river, prevents floods, improves the quality of water flowing through the river, and improves the water resources of the river. It is an object to provide a method of returning water to a river that can secure and improve the natural environment of the river.

[0006]

In order to solve the above problems, a method of returning water to a river according to the present invention is a substantially tubular shape having a portion for discharging water at the tip of a return pipe 1 in the longitudinal direction. The return strainer 2 is provided, and the return strainer 2 is laterally embedded in the ground 3 below the river bottom A1 of the river A, and the return strainer 2 pressurizes and sends water to the return strainer 2. It is characterized in that pressure is infiltrated from 2 to the ground 3 below the riverbed A1 of the river A. By adopting such a method, the return strainer 2 having a substantially cylindrical shape having a portion for discharging water laterally buried in the ground 3 below the riverbed A1 is provided in the longitudinal direction.
From the bottom of the river bottom A1 of the river A, water is permeated in a wide range into the ground 3 along the width direction of the river bottom A1 of the river A and the flow direction of the river A, and groundwater is discharged in the ground 3 below the bottom of the river bottom A1 of the river A. It gradually leaks into the river, and the amount of water in the river A can be stably maintained. Further, the water that has permeated into the ground 3 below the river bottom A1 of the river A is filtered in the ground 3 until it permeates the ground 3 and exudes into the river A, so that the water has extremely high water quality. It can be exuded to A and improve the water quality of the water flowing in the river A.

Wastewater such as domestic wastewater and industrial wastewater is treated by the wastewater treatment apparatus B, and the treated water is pressurized from the return pipe 1 to the return strainer 2 and sent to the return strainer 2
Therefore, it is preferable to apply pressure to the ground 3 below the riverbed A1 of the river A. By adopting such a method, the treated water that has permeated into the ground 3 below the riverbed A1 of the river A can be naturally purified into high-quality water while permeating the ground 3, and the treated water obtained by treating the wastewater is treated. The water quality of the river A can be improved even though the water is discharged into the river.

Further, rainwater is collected in the water reservoir C, and the rainwater collected in the water reservoir C is pressurized from the return pipe 1 to the return strainer 2 and sent to the return strainer 2 to the river bottom A1 of the river A.
It is preferable to infiltrate the soil 3 below the ground under pressure. By adopting such a method, a large amount of rainwater does not flow into the river at a time, and the rainwater is gradually flowed to the river in the form of groundwater so that the amount of water in the river can be stably maintained.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the accompanying drawings.

In the ground 3 below the river bottom A1 of the river A, a return strainer 2 provided at the tip of the return pipe 1 is laterally embedded. Here, the end of the return pipe 1 is located on the ground.

When the return strainer 2 provided at the tip of the return pipe 1 is laterally embedded in the ground 3 below the riverbed A1 of the river A, a method as disclosed in, for example, JP-A-11-190190 is used. Therefore, at least the return strainer 2 of the return pipe 1 is connected to the ground 3 below the river bottom A1 of the river A.
It is to be buried horizontally. This Japanese Patent Laid-Open No. 11-19
The method shown in Japanese Patent No. 0190, when outlined, forms a starting pile 12 on the ground 3 on one of the two banks of the river A and reaches the ground 3 on the other bank as shown in FIG. As shown in FIG. 3 (a), the standing pile 13 is formed, and the excavator 47 positioned on one shore first penetrates the excavation rod 15 having the drill head 14 at the tip end in a diagonally downward direction. To the launch stand pile 12, and the drill head 14 is laid sideways from the launch stand pile 12 portion to penetrate into the ground 3 and the river bottom A
By moving the ground 3 below the riverbed A1 toward the ground 3 below and further penetrating the drill head 14 sideways, the ground 3 below the riverbed A1 is moved laterally to reach the reaching vertical pile 13 formed on the opposite bank. A small-diameter hole 17 is formed laterally in the ground 3 below the riverbed A1 of A. When the drill head 14 reaches the reaching vertical pile 13 in this way, the drill head 1
4 is removed, and a reamer 16 with a large diameter is drilled Dod 15
3 and the return pipe 1 having the return strainer 2 provided at the tip portion is connected to the hole reamer 16 and the return pipe 1 having the return strainer 2 is connected by the excavator 47 as shown in FIG. Reaming 16 while pulling in the opposite direction
The small diameter hole 17 is expanded to form a large diameter hole 18 and the return strainer 2 connected to the expanded hole reamer 16 or the return pipe 1 provided with the return strainer 2 at the tip is placed in the large diameter hole 18. By passing it through, it is possible to laterally bury the return strainer 2 in the ground 3 below the riverbed A1 or the return pipe 1 provided with the return strainer 2 at the tip.

Of course, when laterally burying the return strainer 2 in the ground 3 below the riverbed A1 or the return pipe 1 having the return strainer 2 at the tip, a method other than the above may be adopted. Is.

The ground 3 below the riverbed A1 as described above
Return strainer 2 provided at the tip of return pipe 1 buried in
Is provided with a portion that discharges water over substantially the entire length in the longitudinal direction, and as shown in FIG. 2, there is a gap between the inner tubular portion 8 connected to the tip of the return pipe 1 and the outer periphery of the inner tubular portion 8. And a strainer cylinder portion 10 that surrounds the inner cylinder portion 8 with a return hole 11 formed therein. A shield is provided at the tip of the return strainer 2. Strainer cylinder 1
For example, 0 has a cylindrical outer shape, and is made of steel wire wound around the outer periphery thereof so as to form gaps at predetermined intervals, and water sent from the return pipe 1 to the inner tubular portion 8 is Cylindrical part 1
The water supplied to the gap 9 between the inner tubular portion 8 and the strainer tubular portion 10 from the return hole 11 of 8 is supplied from the gap between the steel wires wound around the strainer tubular portion 10 to the river bottom A1. It is designed to be widely returned to the ground 3 below.

The end of the return pipe 1 is located on the ground, and the end of the return pipe 1 located on the ground treats wastewater such as domestic wastewater and industrial wastewater provided on the ground as shown in FIG. It is connected to the waste water treatment device B, or as shown in FIG. 4, is connected to a water reservoir C provided on the ground for collecting rainwater and the like.

In the embodiment in which the end portion of the return pipe 1 is connected to the wastewater treatment equipment B for treating wastewater such as domestic wastewater and industrial wastewater as shown in FIG. 1, the wastewater such as domestic wastewater and industrial wastewater is drained. The purified water is treated by the treatment device B so as to have a constant water quality, and the treated water purified by the wastewater treatment device B is supplied to the return pipe 1 by the pressurizing pump D and returned from the return pipe 1. Pressurized and sent to strainer 2, river A
The return strainer 2 laterally embedded in the ground 3 below the riverbed A1 spreads the pressure to the ground 3 below the riverbed A1 over a wide range. The treated water that has been pressure- permeated into the ground 3 below the riverbed A1 over a wide area is naturally purified into high-quality water while permeating the ground 3, and thus permeates into the ground 3 below the riverbed A1 over a wide area. The groundwater, which has become high quality, gradually exudes from the river bottom A1 to the river A and increases the amount of water in the river A, and gradually soaks into the river A from the river bottom A1 to stabilize the amount of water in the river A. Is something that can be done. Also, riverbed A1
The water that has permeated the ground 3 below and became high quality is the river A
Since it seeps out into the river, the quality of the river A should be improved compared to the case where the treated water is discharged directly to the river A, even though it is discharged to the treated water river that has treated wastewater such as domestic wastewater and industrial wastewater. By doing so, the natural environment of the river A can be improved and the water resources in the river A can be secured.

Further, as shown in FIG. 4, in the case where rainwater is collected in the water reservoir C provided on the ground and the end of the return pipe 1 is connected to the water reservoir C for accumulating the rainwater, a water pressure pump D
Is supplied to the return pipe 1 from the return pipe 1, and the return strainer 2 is pressurized and sent to the return strainer 2, and the ground 3 below the river bottom A1 of the river A is supplied.
It is to permeate the return strainer 2 laterally embedded in the ground to the ground 3 below the riverbed A1 over a wide range. The water that has been permeated into the ground 3 below the riverbed A1 over a wide range is naturally purified into high-quality water while it permeates the ground 3, and thus permeates into the ground 3 below the riverbed A1 and becomes high. Groundwater that has become water quality can be stabilized by gradually leaching from the riverbed A1 into the river A. In other words, if rainwater that has landed on the ground is directly poured into the river A, there is a risk of flooding if it rains, and there is a problem that the amount of water in the river will decrease unless it rains. By permeating the ground 3 below A1 under pressure, a large amount of rainwater does not flow into the river at one time, and the rainwater is gradually flowed to the river in the form of groundwater to maintain a stable water volume in the river. Even if the rainwater is contaminated as described above, it is purified to high water quality when it penetrates the ground 3 below the riverbed A1 as described above, thus improving the water quality of the river A. It is possible to improve the natural environment of the river A and secure the water resources in the river A.

[0017]

As described above, according to the first aspect of the present invention, the return strainer having a substantially cylindrical shape is provided at the distal end portion of the return pipe and has a portion for discharging water over the longitudinal direction. , This return strainer is laterally embedded in the ground below the river bottom of the river, pressurizing water from the return pipe to the return strainer and sending it, so that the return strainer pressurizes and permeates into the ground below the river bottom. , Spreads water widely in the ground below the bottom of the river, along the width of the bottom of the river, and along the flow direction of the river, forming groundwater in the ground below the bottom of the river and gradually widening the river. The water that oozes out can hold the amount of water in the river in a stable manner, and the water that has penetrated into the ground below the river bottom of the river is filtered in the ground until it penetrates the ground and oozes into the river. Therefore, the water quality is extremely high. Can be exuded into a river and improve the water quality of the water flowing through the river. Thus, according to the present invention, the water quantity of the river is stably maintained and the water quality of the river is improved by a simple method, Improve the natural environment of the river,
It is possible to secure water resources in rivers.

In addition to the effect of the invention described in claim 1, the invention described in claim 2 treats wastewater such as domestic wastewater and industrial wastewater with a wastewater treatment device, and returns the treated water. Since pressure is sent from the pipe to the return strainer and pressure is applied from the return strainer to the ground below the river bottom of the river, the treated water that has penetrated into the ground below the river bottom of the river will naturally flow through the ground. Despite being able to purify to high-quality water and to discharge the treated water that has been treated as wastewater to the river, it is possible to improve the water quality of the river and further improve the river's natural environment. Resources can be secured.

In addition to the effect of the invention described in claim 1, in the invention described in claim 3, rainwater is collected in the water reservoir, and the rainwater collected in the water reservoir is returned from the return pipe. Since the strainer is pressurized and sent from the return strainer to the ground below the river bottom, the rainwater does not flow into the river in large quantities at one time, and rainwater is spread over the river in the form of groundwater. By gradually flowing the water, the amount of water in the river can be stably maintained, the natural environment of the river can be further improved, and water resources in the river can be secured.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of the present invention.

FIG. 2 is an enlarged sectional view of a return strainer portion of the above.

3 (a) and 3 (b) are explanatory views showing the order of horizontally embedding the return strainer in the ground having a high water permeability.

FIG. 4 is a schematic configuration diagram of another embodiment of the present invention.

[Explanation of symbols]

1 Return pipe 2 Return strainer 3 ground A river A1 riverbed B wastewater treatment equipment C water reservoir

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeyoshi Takahashi Iwasaki, Kitakami-shi, Iwate 5 Iwasaki Shinta 5 16% 81 81 Asahi Techno Co., Ltd. (72) Inventor Shuichi Matsumura 1-7 Otemae, Chuo-ku, Osaka No. 24 Naruyuki Kogyo Co., Ltd. (56) Reference Japanese Patent Laid-Open No. 11-336042 (JP, A) Japanese Patent Publication No. 56-23006 (JP, B2) Actual Japanese Publication No. 7-13766 (JP, Y2) (58) Fields surveyed (Int.Cl. ⁷ , DB name) E02B 3/00 ZAB E02B 11/00 A01G 25/06

Claims (3)

(57) [Claims] 1. A return strainer having a substantially cylindrical shape having a portion for discharging water over the longitudinal direction is provided at the tip of the return pipe, and the return strainer is laterally embedded in the ground below the riverbed of the river. , Returning water from a return pipe to a return strainer laterally embedded by sending pressure to return water to the river characterized by pressure infiltration into the ground below the river bottom from the return embedded strainer horizontally Method. 2. Waste water such as domestic waste water and industrial waste water is treated by a waste water treatment device, and the treated water is pressurized and sent from a return pipe to a return strainer that is buried horizontally, and then a return strainer that is buried horizontally is fed from a river. 2. The method for returning water to a river according to claim 1, wherein the ground under the riverbed is subjected to pressure infiltration. 3. The rainwater is collected in a water reservoir, and the rainwater collected in the water reservoir is pressurized from a return pipe to a horizontally-disposed return strainer and is then sent horizontally from a return strainer below a riverbed. The method for returning water to a river according to claim 1, wherein the ground is pressurized and permeated.