JP3604013B2 - Drainage culvert facility - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage culvert facility that is buried in the ground to collect various types of water such as agricultural water, water supply water, and industrial water. More specifically, the present invention relates to cleaning a drainage culvert.
[0002]
[Prior art]
The underground drainage system is buried in the ground where underground water or underground water with free water surface (free underground water) exists, that is, in the riverbed or old riverbed, and the underground water or free underground water is discharged through a plurality of water collection holes. There is a drainage culvert for taking water inside. In addition, the drainage culvert facility is provided with a water pump that sucks water taken into the drainage culvert and discharges it to waterways and facilities (supply side) that are used as agricultural water, water supply water, industrial water, etc. ing.
[0003]
[Problems to be solved by the invention]
Sediment and sediment (hereinafter, referred to as “sediment sediment”) such as earth and sand and refuse accumulate at the bottom of the drainage culvert. This increase in precipitate deposit ing the causes of degradation and water quality such as reduction in water intake efficiency. Therefore, it is desirable to clean the drainage culvert every certain period to remove the sediment.
[0004]
However, conventionally, when cleaning the drainage culvert, the sediment around the drainage culvert is removed by heavy equipment and humans, that is, after the drainage culvert is dug out, the sedimentation in the drainage culvert is removed. Things were removed manually. Also, backfilling was required after washing. Therefore, the conventional operation of cleaning the drainage culvert has to be a large-scale operation, and requires a great deal of time, labor, and cost. In particular, when the drainage culvert is buried in the riverbed, it is necessary to block the river, and the cleaning work has been much larger.
[0005]
Therefore, an object of the present invention is to make it possible to easily clean the inside of a drainage culvert and remove sediment.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a drainage culvert buried in the riverbed of a river where underflow water exists and extending from one shore to the other shore, and a drain provided on the one shore. A water tank, a water intake channel buried on the one bank connecting the base end side of the water collection culvert and the water intake tub, and the water intake tub that is drawn into the water collection culvert and is passed through the water intake channel A suction pump that sucks in water that flows into the supply side and discharges the water to the supply side, and the opening of the collecting culvert is closed by a grating plate provided with a plurality of collecting holes for collecting the underflow water. And in a drainage culvert facility in which a protective body for preventing scouring is provided above the grating plate, the washing water buried in the riverbed along the drainage culvert and both ends of which are closed. A supply pipe and a branch from the washing water supply pipe, A plurality of branch pipes extending to parts, respectively provided at the front end of the branch pipe, located at the bottom of the catchment Umamizo, and a plurality of cleaning nozzles facing the base end side of the catchment Umamizo, A pipe connecting the washing water supply pipe and the pump; a switching means for switching the pump to one of the supply side and the pipe ; and a connecting portion between the water intake and the collection culvert. A sediment deposit reservoir provided in the sediment deposit reservoir, and a removal pump whose discharge port at the tip of the discharge pipe is located above the water surface of the river; The bottom portion has a cross-sectional shape in a direction orthogonal to the extending direction thereof is inclined from both sides toward the center, and at the time of cleaning the drainage culvert, the switching means is switched to the pipeline side to switch the pipeline from the pump to the pipeline. Supply the washing water to the washing water supply pipe via Then, a water flow is jetted from the washing nozzle provided in the branch pipe toward the one bank side in the drainage culvert, and the washing water jetted by the washing nozzle is carried from the drainage culvert. the precipitate deposited was collected in the collecting the precipitate deposits provide infiltration gallery equipment which is characterized in that so as to discard to the river sucked up by removal pump precipitate deposits accumulate the precipitate deposit .
[0007]
In the present invention, the washing water supplied through the washing water supply pipe and the branch pipe is jetted by the washing nozzle in the drainage culvert. The sediment carried by the washing water sprayed from the washing nozzle is discharged by a removal pump in a sediment accumulation. Therefore, in the present invention, the drainage buried underground can be washed without removing soil and the like from the surroundings.
[0009]
Switching means for switching the pump to one of the supply side and the washing water supply pipe; and, when washing the collection culvert, switching the switching means to the washing water supply pipe side to provide a pump. To supply the washing water to the washing water supply pipe. Therefore, since the water in the drainage culvert is used as washing water, there is no need to separately provide a supply source of washing water. Therefore, the structure of the drainage culvert does not become complicated, and the cost required for manufacturing and managing the equipment is reduced.
[0011]
The bottom of the catchment levee has a cross-sectional shape in a direction orthogonal to the extending direction thereof is inclined from both sides toward the center, and the washing nozzle is disposed near the center of the bottom of the catchment cultivation. . By forming the bottom of the catchment culvert with such a cross-sectional shape, the sediment deposited in the catchment culvert collects near the bottom center of the catchment culvert. Therefore, the sediment is reliably collected in the sediment pool by the cleaning water jetted from the cleaning nozzle disposed near the center of the bottom.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the present invention will be described in detail based on embodiments shown in the drawings. 1 to 5 show a drainage culvert facility 1 according to an embodiment of the present invention.
As shown in FIGS. 1 and 2, the drainage culvert facility 1 includes a drainage culvert 3 buried in a riverbed 2 b so as to extend from one shore 2 a to the other shore (not shown). ing. The drainage culvert 3 is a structure made of reinforced concrete extending substantially linearly, and has a groove 3b whose upper portion is an opening 3a.
[0013]
As shown in FIG. 3, the opening 3 a of the drainage culvert 3 is closed by a grating plate 4. The grating plate 4 is a plate made of metal or resin provided with a large number of water collecting holes 4a, and underflow water existing in the riverbed is taken into the inside of the water collecting culvert 3 through these water collecting holes 4a. You. Further, a protective body (futon basket) 6 for preventing scouring is provided above the grating plate 4. The protective body 6 includes a bag 6a formed by knitting wires, and a number of stones 6b filled in the bag 6a.
[0014]
As shown in FIG. 4, the front end side of the groove 3 b of the drainage culvert 3 is closed by an end wall 3 c. On the other hand, the base end side of the drainage culvert 3 is connected to an intake tank 8 via a horizontally extending intake channel 7 buried on the river bank 2a. The intake channel 7 is a tubular structure made of reinforced concrete with both ends open. Further, a sediment sediment tank (sediment sediment reservoir) 9 to be described later is provided at a connection portion between the intake channel 7 and the catchment culvert 3. On the other hand, the water intake tank 8 is a reinforced concrete water tank buried in the river bank 2a, and an upper opening located on the surface of the ground is closed by a lid 8a. A suction pipe 11a of the water pump 11 installed on the ground extends through the lid 8a into the water intake tank 8. The tip of the suction pipe 11 a having the suction port is located near the bottom of the water intake tank 8. On the other hand, the proximal end of the suction pipe 11 a is connected to the main body of the water pump 11. One end of a main discharge pipe 11 b is connected to a main body of the water pump 11 via a main discharge valve 12. The other end of the main discharge pipe 11b is connected to a water channel or a facility (supply side) that uses water taken by the drainage culvert facility 1 as agricultural water, water supply water, industrial water, or the like. In addition, the water intake tank 8 and the water pump 11 are housed in the above-ground building 14.
[0015]
Water is taken into the groove 3b of the drainage culvert 3 through the gap between the stone 6b of the protective body 6 and the water collecting hole 4a of the grating plate 4. The water in the groove 3b flows into the water intake tank 8 via the sediment sediment tank 9 and the water intake passage 7, and is accumulated in the water intake tank 8. The water pump 11 sucks the water in the water intake tank 8 from the suction pipe 11a, and discharges the water to the supply side via the main discharge valve 12 and the main discharge pipe 11b which are open.
[0016]
Next, a description will be given of a cleaning device for the water collecting culvert 3 provided in the water collecting culvert facility 1. First, a flush water supply pipe 16 which is a straight pipe made of metal or resin is buried under the catchment culvert 3. As shown in FIGS. 1 and 3, the washing water supply pipe 16 is arranged at the center in the width direction of the bottom 3 d of the groove 3 b of the drainage culvert 3, and extends in parallel to the drainage culvert 3. As shown in FIG. 1 and FIG. 4, the base end of the washing water supply pipe 16 is located near the river bank 2 a, and the tip is located near the end wall 3 c of the drainage culvert 3. The distal end and the proximal end of the cleaning water supply pipe 16 are closed by butt welding type caps 17a and 17b. Further, as shown in FIG. 3, the washing water supply pipe 16 is accommodated in a concrete protection structure 18 provided below the drainage culvert 3.
[0017]
A plurality of branch pipes 19 are branched from the cleaning water supply pipe 16. In the present embodiment, these branch pipes 19 are provided at regular intervals in the longitudinal direction of the drainage culvert 3. Each branch pipe 19 has a base end connected to the washing water supply pipe 16, extends through the protective structure 18 and extends inside the drainage culvert 3, and has a tip slightly projecting from the bottom 3 d of the groove 3 b. I have. A washing nozzle 21 is attached to the tip of the branch pipe 19. As shown in FIGS. 4 and 5, the direction of the washing nozzle 21 is set so as to jet a water flow from the distal end to the proximal end of the drainage culvert 3.
[0018]
A metal or resin pipe (washing water supply pipe) 22 for connecting the pumping pump 11 and the washing water supply pipe 16 is connected by a joint 23 to the base end side of the washing water supply pipe 16 from the longitudinal center. Have been. The piping structure of the conduit 22 will be described with reference to FIGS. 1 and 2. The conduit 22 extends obliquely to the cleaning water supply pipe 16 in a plan view from one end connected to the cleaning water supply pipe 16. . Further, it extends parallel to the washing water supply pipe 16 in plan view along the slope of the river bank 2 a and is connected to the auxiliary discharge pipe 11 c of the water pump 11. The auxiliary discharge pipe 11c is connected to the main body of the water pump 11 via the auxiliary discharge valve 24. However, the piping structure of the conduit 22 is not particularly limited, as long as the washing water supply pipe 16 and the water pump 11 are connected via the auxiliary discharge valve 24.
[0019]
The sediment sediment tank 9 provided at the connection between the water collection burial 3 and the intake channel 7 has an opening 9a at the top and is buried on the inclined surface of the river bank 2a. The opening 9a located on the ground surface is closed by a lid 9b. Further, the sediment sediment tank 9 has a first communication port 9c connected to the groove 3b of the catchment culvert 3 and a second communication port 9d connected to the intake channel 7. Furthermore, the sediment sediment tank 9 houses a removal pump 26. The discharge pipe 26a of the removal pump 26 extends to the outside of the sedimentation tank 9 through the lid 9b, and the discharge port at the tip of the discharge pipe 26a is located on the water surface 30 of the river.
[0020]
Next, a cleaning operation of the drainage culvert 3 will be described. At the start of cleaning, the water taken in the trench 3b, the sediment sediment tank 9, the intake channel 7, and the intake tank 8 of the drainage culvert 3 is present to some extent.
[0021]
First, with the pump 11 running, the main discharge valve 12 is closed to stop the discharge of water to the supply side, and the auxiliary discharge valve 24 is opened. Further, the operation of the removal pump 26 is started. When the opening / closing of the main discharge valve 12 and the auxiliary discharge valve 24 is set as described above, the water in the water intake tank 8 sucked from the suction pipe 11a becomes the auxiliary discharge valve 24, the auxiliary discharge pipe 11c, the pipe 22, the washing water. It is supplied to each washing nozzle 21 via the supply pipe 16 and each branch pipe 19. Then, as shown by an arrow F in the figure, a water flow is jetted from each washing nozzle 21 toward the riverbank 2a side of the drainage culvert 3, that is, toward the sediment tank 9. The sediment deposits are blown up from the bottom 3d of the groove 3b of the catchment culvert 3 by the water flow injected from the washing nozzle 21, and the turbid water containing the sediment deposits and sediments on the groove 3b of the catchment culvert 3. It flows toward the object tank 9. Therefore, the sediment is carried to the sediment tank 9 by the water jetted from the cleaning nozzle 21.
[0022]
As shown in FIG. 3, the bottom 3 d of the groove 3 b of the catchment culvert 3 has a flat central portion 3 g on both sides 3 e and 3 f in a cross-sectional shape in a direction orthogonal to the extending direction of the catchment culvert 3. The sediment is present mainly in the center 3g of the bottom 3d. Therefore, the sediment is reliably blown up by the water jet injected from the washing nozzle 21 disposed substantially at the center of the central portion 3g in the width direction.
[0023]
The sediment collected in the sediment sediment tank 9 is sucked up by the removal pump 26 together with the water jetted from the washing nozzle 21, and is discarded in the river via the discharge pipe 26a. At the end of cleaning, the auxiliary discharge valve 24 is closed, the main discharge valve 12 is opened, and the removal pump 26 is stopped.
[0024]
The sediment carried by the washing water sprayed from the washing nozzle 21 is discharged from the sediment tank 9 by the removal pump 26. Therefore, in the drainage culvert facility 1 of the present embodiment, the drainage culvert 3 buried underground can be washed without excavating by removing soil and the like from the surroundings.
[0025]
In addition, when the water collecting culvert 3 is washed, the water in the water intake tank 8 is used as washing water from the pump 11 to the washing water supply pipe 16 by setting the opening and closing of the main discharge valve 12 and the auxiliary discharge valve 24 (switching means). Since it is supplied, there is no need to separately provide a supply source of cleaning water. Therefore, the structure of the drainage culvert facility 1 is not complicated, and the cost required for manufacturing and managing the facility is reduced.
[0027]
The present invention is not limited to the above embodiment, and various modifications are possible.
For example, as shown in FIG. 6, the washing water supply pipe 16 may be arranged on the side of the drainage culvert 3. Further, as shown in FIG. 7, a plurality of (two in FIG. 7) cleaning water supply pipes 16 may be provided, and a cleaning nozzle 21 may be provided in a branch pipe 19 branched from each cleaning water supply pipe 16. Furthermore, as shown in FIG. 8, a cleaning nozzle 21 may be arranged on a side wall of the drainage culvert 3.
[0028]
In the above embodiment, all the cleaning nozzles 21 face the base end of the drainage culvert 3 (toward the sedimentation tank 9), but one or more of the cleaning nozzles 21 are oriented in FIG. May be set upward as shown in FIG. Due to the water flow injected from the upward cleaning nozzle 21, foreign matter such as sand closing the water collecting hole 4a of the grating plate 4 and foreign matter existing between the stones 6b of the protective body 6 are generated in the water flow of the river. Is blown up. Therefore, by providing the washing nozzle 21 in this direction, the grating plate 4 and the protection body 6 can be washed simultaneously with the washing of the drainage culvert 3.
[0030]
【The invention's effect】
As is apparent from the above description, in the water collection culvert of the present invention, the cleaning water supplied through the cleaning water supply pipe and the branch pipe is jetted in the water collection burial by the cleaning nozzle. Then, the sediment carried by the washing water sprayed from the washing nozzle is discharged by the removal pump in the sediment accumulation. Therefore, in the drainage culvert of the present invention, the drainage buried underground can be washed without removing soil and the like from its surroundings. Therefore, the time required for cleaning the drainage culvert is significantly reduced, and the labor and cost required for facility management are significantly reduced. Further, since the washing water is jetted from the plurality of washing nozzles, the inside of the drainage culvert can be washed even with a relatively small amount of washing water. Furthermore, even when the length of the drainage culvert is long, the inside of the drainage culvert can be reliably washed by increasing the number of washing nozzles accordingly.
[Brief description of the drawings]
FIG. 1 is a plan view showing a drainage culvert according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a drainage culvert according to the embodiment of the present invention.
FIG. 3 is a sectional view taken along line III-III in FIG. 1;
4 is a partially enlarged view of the part amount I V of FIG.
FIG. 5 is a partially enlarged view of a portion V in FIG. 2;
FIG. 6 is a sectional view showing a first modification of the present invention.
FIG. 7 is a sectional view showing a second modification of the present invention.
FIG. 8 is a sectional view showing a third modification of the present invention.
FIG. 9 is a sectional view showing a fourth modification of the present invention .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water collecting burial equipment 2a River bank 2b River bed 3 Water collecting burial 3a Opening 3b Groove 3c End wall 3d Bottom 3e, 3f Side 3g Central part 4 Grating board 4a Water collecting hole 6 Protective body 6a Bag 6b Stone 7 Water intake Road 8 Intake tank 8a Lid 9 Sediment sediment tank 9a Opening 9b Lid 9c, 9d Communication port 11 Pump 11a Suction pipe 11b Main discharge pipe 11c Auxiliary discharge pipe 12 Main discharge valve 14 Ground building 16 Wash water supply pipe 17a , 17b Cap 18 Protection structure 19 Branch pipe 21 Washing nozzle 22 Pipe line 23 Joint 24 Auxiliary discharge valve 26 Removal pump 26a Discharge pipe 30 Water surface

Claims (1)

A catchment buried buried in the riverbed of underground water and extending from one shore to the other shore, a water intake tank provided on the one shore, and a base end of the catchment grave And an intake channel buried on the one bank that connects the intake tank to the intake side, and sucks water that has been taken into the catchment culvert and that has flowed into the intake tank via the intake channel, to the supply side. A pump for discharging the water, the opening of the drainage culvert is closed by a grating plate provided with a plurality of water collecting holes for collecting the underflow water, and a scouring prevention is provided above the grating plate. In a drainage culvert facility where a protective body for
A flush water supply pipe buried in the riverbed along the catchment culvert and closed at both ends ;
A plurality of branch pipes each branching from the washing water supply pipe and extending to the inside of the drainage culvert,
A plurality of washing nozzles respectively provided at the distal end of the branch pipe , arranged at the bottom of the drainage culvert, and facing the base end side of the drainage culvert ,
A pipe connecting the washing water supply pipe and the pump;
Switching means for switching the water pump to one of the supply side and the pipeline;
Sediment deposits provided at the connection between the intake channel and the drainage culvert ,
A discharge pump that is housed in the sediment deposits and has a discharge port at the tip of the discharge pipe positioned above the surface of the river;
The bottom part of the drainage culvert has a cross-sectional shape in a direction orthogonal to the extending direction thereof is inclined from both sides toward the center,
At the time of washing the drainage culvert, the switching means is switched to the pipe side to supply wash water to the wash water supply pipe from the pump through the pipe, and the washing nozzle provided in the branch pipe. A jet of water is injected in the drainage culvert toward the one bank side from above, and the sediment carried from the drainage culvert is collected in the sediment reservoir by the washing water injected by the washing nozzle. and, infiltration gallery facility which is characterized in that so as to discard to the river sucked up by removal pump precipitate deposits accumulate the precipitate deposits.

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