JP6889881B2 - Leakage cause monitoring device for buried pipe canals and water leakage cause monitoring method for buried pipe canals - Google Patents

Description

The present invention provides a leak cause monitoring device for constantly observing the cause of a leak in a pipe channel buried in the soil, particularly for investigating the cause of a leak accident in a high-pressure agricultural pipeline and identifying the location of the leak, and a leak cause monitoring method. Regarding.

A breakage accident of a hard polyvinyl chloride pipe (PVC) for high pressure used in a branch canal of a high pressure agricultural pipeline is fatigue breakage. When the embedded rigid polyvinyl chloride pipe is repeatedly loaded, cracks are generated in the pipe wall and grow even if the stress magnitude is smaller than the allowable tensile strength. Fatigue fracture is a phenomenon that eventually leads to cracking. However, since it is difficult to visually observe the dynamic phenomenon leading to the destruction of the pipe channel buried in the soil, the cause of this repeated load and the mechanism of pipe breakage have been fully elucidated. Not.
The total length of the basic agricultural pipeline laid in the agricultural and rural development project exceeds 12,000 km, and the total length of its branch canals has reached an enormous length. The material of the pipe body of the agricultural pipeline is selected according to the water pressure classification of the pipeline and the water supply and distribution method, and if the design water pressure is 1 MPa or less in the terminal branch canal that distributes irrigation water to the field, the initial cost In many cases, inexpensive hard polyvinyl chloride pipes are used. Rigid PVC pipes occupy about 20% of the total length of agricultural pipelines, and 32% of the endowed amount of agricultural pipelines with a diameter of 500 mm or less, which is maintained mainly in the terminal water distribution system, is rigid PVC. It is said to be a vinyl chloride pipe. These small-diameter pipes are often used for branch canals constructed by prefectures and groups, and it is difficult for the national government to grasp the actual situation regarding damage accidents of small-diameter pipes.
In the beneficiary area where upland irrigation is performed, high-pressure water is required to rotate the sprinkler, and if the design water pressure is 1 MPa or less, high-pressure pipes (for example, VP pipes and VH pipes) are used. In the land improvement zone that manages such high-pressure pipelines, the number of pipe breakage accidents of rigid polyvinyl chloride pipes is increasing year by year, which is a problem in maintenance. However, since the restoration work for pipe breakage accidents is prioritized at the site, the cause of the pipe breakage accident has not been investigated and preventive and maintenance measures have not been taken.
Ancillary facilities for investigating the cause of water leakage accidents are created by the Ministry of Agriculture, Forestry and Fisheries Rural Promotion Bureau, and are the standards for planning and construction of domestic agricultural pipelines. Design Not specified in the "pipeline" (hereinafter referred to as the design standard).
The location of water leakage is generally identified by a water filling test that detects water leakage by closing the deadline with a water control valve for each hydraulic unit and observing the degree of decrease in the water level on the upstream side.
Since the water filling test for detecting water leakage is a labor-intensive and time-consuming work, it is difficult to continue it as a daily water leakage monitoring test.
In recent years, there is a technique of throwing a leak exploration robot with a camera into a pipe to photograph a crack in the pipe (for example, Patent Document 1).
Further, Patent Document 2 proposes to install a sensor in the pipeline and monitor the damage of the pipeline by the sensor.

Japanese Patent Publication No. 2004-509321 European Patent Application Publication No. 2947420

However, in Patent Document 1, it is necessary to excavate the vicinity of the pipeline and cut the vicinity of the pipe apex in order to secure the inlet of the leak exploration port pot, and the cost for using the leak exploration robot is high. Land improvement districts that maintain and manage agricultural pipelines are surveys that cannot be easily conducted.
Patent Document 2 can detect pipe breakage or detect the risk of breakage by monitoring the deformation of the pipeline with the waveguide as the detection target, but it is not suitable for investigating the cause of the breakage. ..
Since the monitoring facility is not specified in the current design standards, the monitoring facility has never been constructed on site. It is important to carry out prompt restoration work after a water leak accident. In areas where water leakage accidents occur frequently, restoration work is busy, and investigations are not conducted to investigate the cause of water leakage accidents, and the cause is currently estimated by the empirical judgment of the maintenance manager. .. Therefore, in agricultural pipelines where water leakage accidents occur frequently due to the same cause, it is not possible to take appropriate countermeasures, and there are areas where water leakage accidents continue.

Therefore, an object of the present invention is to provide a leak cause monitoring device for a buried pipe channel and a leak cause monitoring method for a buried pipe channel, which can investigate the cause of the leak.

The water leakage cause monitoring device for a buried pipe water channel according to claim 1 is a water leakage cause monitoring device for a buried pipe water channel that monitors the water leakage cause of a pipe water channel buried in the soil, and is provided in the pipe water channel. A monitoring facility is provided adjacent to the pipe water control valve downstream of the pipe water control valve, and the monitoring facility includes a bottomed cylindrical member and an opening / closing lid that closes the upper surface of the bottomed cylindrical member. A monitoring space is formed by the above, and the monitoring space is provided with a pipe connected to the water control valve for the pipe channel, and the pipe is equipped with a water control valve capable of stopping water flow and adjusting the water pressure, and a water leakage exploration robot. and poured or recovery turning-recovery port provided, hydraulically sensor for detecting the water pressure in said piping used for the tube waterway, the distortion of the earth pressure sensor or the pipe for detecting the earth pressure acting on the pipe detection A strain sensor, a data logger for storing detection data of the soil pressure sensor or the strain sensor, and a power source for operating the data logger are provided , and the data logger and the power source are arranged in the monitoring space. The soil pressure sensor or the strain sensor is arranged along the pipe channel located downstream of the monitoring facility .
The present invention according to claim 2 is characterized in that, in the water leakage cause monitoring device for a buried pipe channel according to claim 1, the earth pressure sensor is arranged in the soil above the pipe.
The present invention according to claim 3 is characterized in that, in the water leakage cause monitoring device for the buried pipe channel according to claim 1, the strain sensor is arranged at the pipe top, the pipe bottom, and the pipe side of the pipe. ..
According to the fourth aspect of the present invention, in the water leakage cause monitoring device for the buried pipe channel according to any one of claims 1 to 3, the pipe channel is used as a branch channel of a high-pressure agricultural pipeline. The pipe is characterized by being a rigid polyvinyl chloride pipe.
The method for monitoring the cause of water leakage in the buried pipe water channel according to claim 5 is the cause of water leakage in the buried pipe water channel using the water leakage cause monitoring device for the buried pipe water channel according to any one of claims 1 to 4. a monitoring method, and causes the monitoring step the soil pressure or applied to the pipe detected by the earth pressure sensor for storing the detection data of the strain of the pipe detected by the strain sensor to the data logger, the tube and leakage determination step of determining the presence or absence of water leakage the said water pressure in the pipe is detected by the pressure sensors used in waterways, after the leakage determination step, leak location to identify the leakage position by introducing a leak exploration robots It is characterized by having a specific step.
The present invention according to claim 6 is the detection method in which a first monitoring facility and a second monitoring facility are provided in the pipe channel and accumulated in the cause monitoring step in the method for monitoring the cause of water leakage in the buried pipe channel according to claim 5. The data and the leak determined in the leak determination step are targeted at the pipe located between the first monitoring facility and the second monitoring facility, and in the leak location identification step, the leak exploration robot is used. It is characterized in that it is input from the first monitoring facility and collected at the second monitoring facility.

According to the present invention, the presence or absence of water leakage can be determined by detecting the water pressure in the pipe with the water pressure sensor, and the earth pressure applied to the pipe detected by the earth pressure sensor or the distortion detection data of the pipe detected by the strain sensor is a data logger. The cause of water leakage can be investigated by accumulating in.
Further, according to the present invention, the influence of the road traffic load can be investigated, and when a water leak occurs, the leak position can be specified.

Configuration diagram of a leak cause monitoring device for a buried pipe channel according to an embodiment of the present invention. Configuration diagram of the leak cause monitoring device for the buried pipe channel according to another embodiment of the present invention. A photograph showing a part of the configuration diagram shown in FIG. A flow showing a method for monitoring the cause of water leakage in a buried pipe channel according to an embodiment of the present invention.

In the water leakage cause monitoring device for the buried pipe channel according to the first embodiment of the present invention, a monitoring facility is provided downstream of the water control valve for the pipe channel provided in the pipe channel and adjacent to the water control valve for the pipe channel. The monitoring facility is provided with a bottomed cylindrical member and an opening / closing lid that closes the upper surface of the bottomed cylindrical member to form a monitoring space. Is equipped with a water control valve that can stop water flow and adjust the water pressure, and a water pressure sensor that detects the water pressure in the pipe used for the pipe channel, and a water pressure sensor that detects the water pressure in the pipe used for the pipe. It is equipped with a soil pressure sensor that detects applied soil pressure or a strain sensor that detects pipe strain, a data logger that stores detection data from the soil pressure sensor or strain sensor, and a power supply that operates the data logger. The power supply is placed in the monitoring space, and the soil pressure sensor or strain sensor is placed along the pipe channel located downstream of the monitoring facility . According to this embodiment, the water pressure in the pipe can be detected by the water pressure sensor to determine the presence or absence of water leakage, and the earth pressure applied to the pipe detected by the earth pressure sensor or the strain detection data of the pipe detected by the strain sensor can be used. The cause of water leakage can be investigated by accumulating in the data logger.

In the second embodiment of the present invention, in the water leakage cause monitoring device of the buried pipe channel according to the first embodiment, the earth pressure sensor is arranged in the soil above the pipe. According to this embodiment, the influence of the road traffic load can be investigated.

In the third embodiment of the present invention, the strain sensor is arranged on the pipe top, the pipe bottom, and the pipe side in the water leakage cause monitoring device of the buried pipe channel according to the first embodiment. According to this embodiment, the influence of the road traffic load and the water pressure in the pipe on the pipe can be investigated.

In the fourth embodiment of the present invention, in the water leakage cause monitoring device for the buried pipe canal according to any one of the first to third embodiments, the pipe canal is a branch canal of a high-pressure agricultural pipeline and the pipe is used. , It is a hard polyvinyl chloride pipe. According to this embodiment, it is possible to investigate the cause of water leakage in an agricultural pipeline, especially in a branch canal where water leakage is large.

The method for monitoring the cause of water leakage in the buried pipe channel according to the fifth embodiment of the present invention causes the data logger to accumulate the detection data of the earth pressure applied to the pipe detected by the earth pressure sensor or the strain of the pipe detected by the strain sensor. After the monitoring step, the leak judgment step in which the water pressure in the pipe used for the pipe canal is detected by the water pressure sensor to judge the presence or absence of water leakage, and the water leakage judgment step, a leak detection robot is put in to identify the leak location. It is equipped with a location identification step. According to this embodiment, the influence of the road traffic load can be investigated, and when a water leak occurs, the leak position can be specified.

In the sixth embodiment of the present invention, in the method for monitoring the cause of water leakage in the buried pipe channel according to the fifth embodiment, the first monitoring facility and the second monitoring facility are provided in the conduit, and the detection accumulated in the cause monitoring step. The data and the leak judged in the leak judgment step are targeted at the piping located between the first monitoring facility and the second monitoring facility, and in the leak location identification step, the leak exploration robot is input from the first monitoring facility. , It is collected at the second monitoring facility. According to the present embodiment, it is possible to investigate the influence of the road traffic load on the piping located between the first monitoring facility and the second monitoring facility, and to identify the leak position when a leak occurs. ..

Hereinafter, a leak cause monitoring device for a buried pipe channel according to an embodiment of the present invention will be described.
FIG. 1 is a configuration diagram of a leak cause monitoring device for a buried pipe channel according to this embodiment.

In the leak cause monitoring device for the buried pipe channel according to this embodiment, the monitoring facility 20 is provided in the pipe channel 10 buried in the soil A.
The pipe water channel 10 is appropriately provided with a water control valve 11 capable of stopping water flow and adjusting the water pressure. The monitoring facility 20 is preferably provided adjacent to the water control valve 11. In FIG. 1, the monitoring facility 20 is provided downstream of the water control valve 11.
The monitoring facility 20 forms a monitoring space B by a bottomed cylindrical member 21 having a depth of 2000 mm and an internal space having a diameter of 1500 mm, and an opening / closing lid 22 having a diameter of 900 mm that closes the upper surface of the bottomed cylindrical member 21. The opening / closing lid 22 is located on the ground surface C.
The monitoring space B is provided with a pipe 30 connected to the pipe 12 of the pipe water channel 10.
The pipe 12 or the pipe 30 penetrates the bottomed cylindrical member 21.
The pipe 30 in the monitoring space B is provided with a water control valve 31 capable of stopping water flow and adjusting the water pressure, and an input / recovery port 32 for inputting or collecting the leak detection robot 51 (see FIG. 2). The diameter of the loading / unloading port 32 is smaller than the diameter of the opening / closing lid 22 and larger than the diameter of the pipe 30, for example, 200 mm.

The water leakage cause monitoring device detects the distortion of the pipe 12, the water pressure sensor 41 that detects the water pressure in the pipe 12 or the pipe 30 used in the pipe water passage 10, the earth pressure sensor 42 that detects the earth pressure applied to the pipe 12. It is provided with a strain sensor 43, a data logger 44 for storing the water pressure sensor 41, an earth pressure sensor 42, and detection data of the strain sensor 43, and a power supply 45 for operating the data logger 44.
The earth pressure sensor 42 is arranged vertically above the pipe 12 in the soil A, that is, between the pipe 12 and the ground surface C. FIG. 1 shows a case where the earth pressure sensor 42a is arranged 200 mm above the pipe top of the pipe 12 and the earth pressure sensor 42b is arranged 100 mm above the pipe top of the pipe 12.
Further, FIG. 1 shows, as the strain sensor 43, a strain sensor 43a arranged at the top of the pipe 12, a strain sensor 43b arranged at the bottom of the pipe 12, and a strain sensor 43c arranged on the pipe side of the pipe 12. There is. For example, when the diameter of the pipe 12 is larger than a predetermined value, it is preferable to arrange the plurality of strain sensors 43a, 43b, 43c on the cross section perpendicular to the pipe axis of the pipe 12, for example, the diameter of the pipe 12. If is smaller than a predetermined value, any one of the distortion sensors 43 may be provided.
At least a data logger 44 and a power supply 45 are arranged in the monitoring facility 20. As shown in FIG. 1, it is preferable to dispose the water pressure sensor 41 in the monitoring facility 20.

According to this embodiment, the water pressure in the pipes 12 and 30 can be detected by the water pressure sensor 41 to determine the presence or absence of water leakage, and the earth pressure applied to the pipe 12 detected by the earth pressure sensor 42 or the pipe detected by the strain sensor 43. The cause can be investigated by accumulating the detection data of the 12 strains in the data logger 44.
Further, according to this embodiment, by arranging the earth pressure sensor 42 in the soil A above the pipe 12, the influence of the road traffic load can be investigated.
Further, according to this embodiment, by arranging the strain sensors 43a, 43b, 43c on the pipe top, the pipe bottom, and the pipe side of the pipe 12, the influence of the road traffic load and the water pressure in the pipe on the pipe 12 can be investigated. ..
Further, according to this embodiment, by arranging the earth pressure sensor 42 and the strain sensor 43, it is possible to investigate the influence of the road traffic load and the water pressure in the pipe on the pipe 12.
Further, according to this embodiment, the cause of water leakage can be easily investigated by providing the monitoring facility 20 provided with the opening / closing lid 22 on the ground surface C.
Further, according to the present embodiment, by providing the input / recovery port 32 for inputting or collecting the water leakage exploration robot 51 in the pipe 30 located in the monitoring facility 20, the water leakage exploration robot 51 is used to particularly specify the water leakage position. Can be done.
By using the pipe channel 10 as a branch channel of the high-pressure agricultural pipeline and the pipe 12 as a rigid polyvinyl chloride pipe, it is possible to investigate the cause of water leakage in the agricultural pipeline, especially in the branch channel with a large amount of water leakage.

FIG. 2 is a configuration diagram of a water leakage cause monitoring device for a buried pipe channel according to another embodiment of the present invention, and FIG. 3 is a photograph showing a part of the configuration diagram shown in FIG. The same functional members as those in FIG. 1 are designated by the same reference numerals, and some description thereof will be omitted.
The leak cause monitoring device for the buried pipe canal according to the embodiment is provided with a first monitoring facility 20A and a second monitoring facility 20B in the pipe canal 10.
The first monitoring facility 20A is arranged upstream of the second monitoring facility 20B, the first monitoring facility 20A is arranged downstream of the first water control valve 11A, and the second monitoring facility 20B is arranged upstream of the second water control valve 11B. ing.
In the first monitoring facility 20A, the pipe 30 in the monitoring space B is provided with a water control valve 31 capable of stopping water flow and adjusting the water pressure, and an input / recovery port 32A for inputting or collecting the leak detection robot 51.
In the second monitoring facility 20B, the pipe 30 in the monitoring space B is provided with an input / collection port 32B for inputting or collecting the leak exploration robot 51 and a collection net 33. The recovery net 33 may be arranged downstream of the input / recovery port 32B and may have a function that the leak exploration robot 51 cannot pass through.

FIG. 3A shows the input / recovery port 32A of the first monitoring facility 20A, and FIG. 3B shows the input / recovery port 32B of the second monitoring facility 20B.
The input / collection ports 32A and 32B are provided with lids made of transparent acrylic plates.
Although not shown in the first monitoring facility 20A and the second monitoring facility 20B, the water pressure sensor 41, the earth pressure sensor 42, the strain sensor 43, the data logger 44, and the power supply 45 are provided as in the embodiment shown in FIG. Is preferable.
It is preferable that the leak detection robot 51 has a photographing means, and further includes a lighting means and a battery. As a shooting means, a moving image shooting means is preferable. The leak detection robot 51 has a total length of 200 mm or less and a total width of less than the diameter of the pipe 12. The movement method of the leak exploration robot 51 includes a method provided with self-propelled means and a method of flowing down from the upstream without providing self-propelled means. In the leak detection robot 51, one end of the tracking cord 52 is connected, and the other end of the tracking cord 52 is connected to a reel arranged in the charging / collecting port 32A. The tracking code 52 assists the moving operation of the leak exploration robot 51 or is used for emergency recovery of the leak exploration robot 51, but can also serve as a signal line or a power supply line for captured image data.

FIG. 4 is a flow showing a method for monitoring the cause of water leakage in a buried pipe channel according to an embodiment of the present invention.
The method for monitoring the cause of water leakage in the buried pipe channel according to this embodiment includes a cause monitoring step 61, a water leakage determination step 62, and a water leakage location identification step 63.
In the cause monitoring step 61, the detection data of the earth pressure applied to the earth pressure 12 detected by the earth pressure sensor 42, the distortion of the pipe 12 detected by the strain sensor 43, and the water pressure detected by the water pressure sensor 41 are accumulated in the data logger 44.
In the embodiment shown in FIG. 2, the detection data accumulated in the cause monitoring step 61 targets the pipe 12 located between the first monitoring facility 20A and the second monitoring facility 20B.
By accumulating the detection data of the earth pressure applied to the pipe 12, the strain of the pipe 12, and the water pressure, the influence of the road traffic load and the water pressure in the pipe on the pipe 12 can be investigated. The cause of water leakage in the pipe 12 can be investigated by accumulating detection data of at least one of the earth pressure applied to the pipe 12 and the strain of the pipe 12, but the earth pressure applied to the pipe 12 and the strain of the pipe 12 By accumulating the detection data of both, the influence of the road traffic load and the water pressure in the pipe can be investigated more accurately.

In the water leakage determination step 62, the water pressure in the pipe 12 used in the pipe water channel 10 is detected by the water pressure sensor 41 to determine the presence or absence of water leakage in a predetermined section. If water leakage is suspected in the predetermined section, it is judged that there is water leakage.
The predetermined section is the pipe 12 of the pipe channel 10 that can be partitioned by the water control valve 11 provided in the pipe channel 10 or the water control valve 31 provided in the monitoring facility 20. In the embodiment shown in FIG. 2, the pipe 12 located between the first monitoring facility 20A and the second monitoring facility 20B is targeted.
Leakage detection in a predetermined section can be performed by measuring the decrease in hydrostatic pressure at a specific time zone with a water pressure sensor 41, for example, from midnight to early morning when the farmer does not operate the faucet. Further, the detection of water leakage in a predetermined section can be performed by measuring the magnitude of the water hammer pressure when the water tap is operated by the water pressure sensor 41.

In the leak location identification step 63, after the leak determination step 62, the leak detection robot 51 is thrown in to identify the leak location.
In the embodiment shown in FIG. 2, the leak exploration robot 51 is introduced from the first monitoring facility 20A and collected at the second monitoring facility 20B.

As described above, according to the present embodiment, the influence of the road traffic load can be investigated, and when a water leak occurs, the leak position can be specified.
According to the present invention, leak monitoring of the entire pipe canal 10 can be performed by installing the pipe canal 10 at predetermined intervals, for example, at intervals of about 400 m, as in an air exhaust facility of an agricultural pipeline.
In addition, a monitoring facility 20 is provided in the pipe channel 10, and the monitoring facility 20 measures the water pressure in the pipe, the average flow velocity in the pipe, the strain of the pipe, and the earth pressure near the top of the pipe, which is a major cause of fatigue failure of the pipe 12. It will be possible to collect and consider information to identify the causes of the impact. In order to investigate the fatigue fracture mechanism of the pipe 12, it is necessary to observe the growth of cracks. If the monitoring facility 20 is provided with an input / recovery port 32, the input / recovery port 32 is used as a pit for input / recovery of the leak exploration robot 51, and the leak exploration robot 51 is equipped with a function capable of taking a picture and acquiring a leak sound. , It is possible to detect the location and size of leaks and small cracks that have not yet leaked.

The present invention is particularly suitable for branch canals of agricultural pipelines.

10 Pipe canal 11 Water control valve (water control valve for pipe canal)
11A 1st water control valve 11B 2nd water control valve 12 Piping 20 Monitoring facility 20A 1st monitoring facility 20B 2nd monitoring facility 21 Bottomed cylindrical member 22 Opening and closing lid 30 Piping 31 Water control valve 32, 32A, 32B Input / recovery port 33 Recovery net 41 Water pressure sensor 42, 42a, 42b Earth pressure sensor 43, 43a, 43b, 43c Strain sensor 44 Data logger 45 Power supply 51 Leakage exploration robot 52 Tracking code 61 Cause monitoring step 62 Leakage determination step 63 Leakage location identification step A Underground B Monitoring space C Ground surface

Claims (6)

It is a leak cause monitoring device for buried canals that monitors the causes of leaks in pipes buried in the soil.
A monitoring facility is provided adjacent to the conduit valve downstream of the conduit valve provided in the conduit.
The monitoring facility forms a monitoring space with a bottomed cylindrical member and an opening / closing lid that closes the upper surface of the bottomed cylindrical member.
The monitoring space is provided with a pipe connected to the water control valve for the pipe channel.
The piping is provided with a water control valve that can stop water flow and adjust the water pressure, and an input / recovery port for inputting or collecting a leak detection robot.
Hydraulically sensor for detecting the water pressure in said pipe to be used in the tube water channel,
An earth pressure sensor that detects the earth pressure applied to the pipe or a strain sensor that detects the strain of the pipe.
A data logger that stores the data detected by the earth pressure sensor or the strain sensor,
It is equipped with a power supply for operating the data logger .
The data logger and the power supply are arranged in the monitoring space, and the data logger and the power supply are arranged in the monitoring space.
A water leakage cause monitoring device for a buried pipe canal, wherein the earth pressure sensor or the strain sensor is arranged along the pipe canal located downstream of the monitoring facility. The leak cause monitoring device for a buried pipe channel according to claim 1, wherein the earth pressure sensor is arranged in the soil above the pipe. The water leakage cause monitoring device for a buried pipe channel according to claim 1, wherein the strain sensor is arranged on the pipe top, the pipe bottom, and the pipe side of the pipe. The pipe canal is used as a branch canal of a high-pressure agricultural pipeline.
The water leakage cause monitoring device for a buried pipe channel according to any one of claims 1 to 3, wherein the pipe is a rigid polyvinyl chloride pipe. A method for monitoring the cause of water leakage in a buried pipe waterway using the water leakage cause monitoring device for the buried pipe waterway according to any one of claims 1 to 4.
And cause the monitoring step the soil pressure or applied to the pipe detected by the earth pressure sensor for storing the detection data of the strain of the pipe detected by the strain sensor to the data logger,
And leakage determination step of determining the presence or absence of water leakage the water pressure detected by the pressure sensor in said pipe to be used in the tube water channel,
A method for monitoring a cause of water leakage in a buried pipe channel, which comprises a step for identifying a water leakage point by throwing in a water leakage exploration robot after the water leakage determination step. A first monitoring facility and a second monitoring facility were set up in the pipe channel,
The detection data accumulated in the cause monitoring step and the water leakage determined in the water leakage determination step target the piping located between the first monitoring facility and the second monitoring facility.
The method for monitoring the cause of water leakage in a buried pipe channel according to claim 5 , wherein in the step of identifying a water leakage location, the water leakage exploration robot is introduced from the first monitoring facility and collected at the second monitoring facility.

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