A method for detecting leakage channels of reservoir dams

Abstract

The present invention discloses a method for detecting leakage channels of reservoir dams, comprising the following steps: S1: firstly, using a geophysical exploration method to detect leakage areas or disputed leakage areas on the dam; S2: using a drill bit to reasonably arrange drilling holes in the leakage area or disputed leakage area described in S1, and drilling the holes to the leakage elevation of the leakage area; S3: arranging a shielding cover around the borehole to shield the borehole, and connecting a connecting pipe at the top of the shielding cover, the drainage end of the connecting pipe is connected to a transparent water collecting tank, and a pressure sensor is inserted into the shielding cover. The present invention can accurately determine the leakage channel by observing the water volume by blowing air through the borehole, and can determine the leakage situation of the leakage channel by measuring the value, which provides convenience for subsequent repair work and meets the use requirements.

Description

Technical Field

[0001] The invention relates to the field of detecting leakage channels of reservoir dams, and in particular to a method for detecting leakage channels of reservoir dams. Background Art

[0002] As a very important water conservancy project, reservoirs play a huge role in my country's national economic construction. Due to various factors, many reservoir dams have safety hazards such as leakage, which poses a great threat to the operation function of the reservoir, the safety of people's lives and property, and will also pollute the surrounding environment. Therefore, accurate detection of leakage hazards in reservoir dams is crucial; existing dam leakage detection methods, such as electrical methods, electromagnetic methods, elastic wave methods and other representative methods can only speculate the leakage area of ​​the dam, and fail to accurately detect the leakage channel, which in turn affects the subsequent repair work of personnel and cannot meet the use needs. Therefore, we propose a method for detecting leakage channels in reservoir dams to solve the above problems. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a method for detecting leakage channels of reservoir dams.

[0004] The present invention provides a method for detecting a leakage channel of a reservoir dam, comprising the following steps:

[0005] S1: First, geophysical exploration methods are used to detect leakage areas or disputed leakage areas on the dam;

[0006] S2: Drill holes in a reasonable arrangement in the leakage area or disputed leakage area described in S1 using a drill bit, and drill the holes to the leakage elevation of the leakage area;

[0007] S3: a shielding cover is arranged around the borehole to shield the borehole, a connecting pipe is connected to the top of the shielding cover, a drainage end of the connecting pipe is connected to a transparent water collecting tank, and a pressure sensor is inserted into the shielding cover;

[0008] S4: Select a drill rod connected to an air compressor, insert the drill rod into the shielding cover, connect a flow sensor between the air outlet of the air compressor and the drill rod, use the air compressor and the drill rod to blow air into the borehole described in S2, measure the amount of the blown gas through the flow sensor, and detect the pressure in the borehole through the pressure sensor;

[0009] S5: Select a timer, and start the timer to count while blowing;

[0010] S6: During the blowing process, the air pressure in the borehole described in S3 is gradually increased, and under the action of the air pressure, the water in the borehole is sprayed upward, and the sprayed water enters the transparent water collecting tank through the shielding cover and the connecting pipe described in S3;

[0011] S7: By observing the value displayed on the timer, when a certain time interval is reached, stop blowing, and by observing the amount of water in the transparent water collecting tank in S6, determine whether the borehole is a leakage channel;

[0012] S8: Determine the leakage condition of the leakage channel by checking the amount of water in the water collecting tank, the amount of gas displayed on the flow sensor, and the pressure value displayed on the pressure sensor.

[0013] Preferably, in S2, the diameter of the drill hole is 70-80 cm.

[0014] Preferably, in S3, a scale line is provided on the front side of the transparent water collecting tank for measuring the amount of water in the transparent water collecting tank, so that personnel can intuitively judge the amount of water.

[0015] Preferably, in S4, the top end and the bottom end of the drill rod are both open and connected.

[0016] Preferably, in S3, the shielding cover is made of hard plastic, and the connecting pipe is made of a flexible hose.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention can accurately determine the leakage channel by drilling holes and blowing air to observe the water volume. The leakage situation of the leakage channel can be determined through the measured value, which provides convenience for subsequent repair work and meets the use requirements. DETAILED DESCRIPTION

[0019] The present invention will be further explained below in conjunction with specific embodiments. Example

[0020] This embodiment provides a method for detecting a leakage channel of a reservoir dam, comprising the following steps:

[0021] S1: First, geophysical exploration methods are used to detect leakage areas or disputed leakage areas on the dam;

[0022] S2: Use a drill bit to arrange holes in the leakage area or disputed leakage area in S1 and drill the holes to the leakage elevation of the leakage area, where the diameter of the holes is between 70-80 cm;

[0023] S3: A shielding cover is arranged around the borehole to shield the borehole, and a connecting pipe is connected to the top of the shielding cover, the drainage end of the connecting pipe is connected to a transparent water collecting tank, and a pressure sensor is inserted into the shielding cover, wherein the front side of the transparent water collecting tank is provided with a scale line for measuring the amount of water in the transparent water collecting tank, so that personnel can intuitively judge the amount of water, wherein the shielding cover is made of hard plastic, and the connecting pipe is made of a flexible hose, and the shielding cover can be used to effectively reduce the situation where water flows to the outside;

[0024] S4: Select a drill rod connected to an air compressor, insert the drill rod into the shielding cover, connect a flow sensor between the air outlet of the air compressor and the drill rod, use the air compressor and the drill rod to blow air into the borehole in S2, measure the amount of gas blown out by the flow sensor, and detect the pressure in the borehole by the pressure sensor, wherein the top and bottom ends of the drill rod are both open and connected to form a ventilation pipe to achieve the ventilation effect;

[0025] S5: Select a timer, and start the timer to measure the time of the air blowing and pressurization during the air blowing.

[0026] S6: During the blowing process, the air pressure in the borehole in S3 is gradually increased, and under the action of the air pressure, the water in the borehole is sprayed upward, and the sprayed water enters the transparent water collecting tank through the shielding cover and the connecting pipe in S3;

[0027] S7: By observing the value displayed on the timer, when a certain time interval is reached, stop blowing, and by observing the amount of water in the transparent water collecting tank in S6, determine whether the borehole is a leakage channel;

[0028] S8: Determine the leakage condition of the leakage channel by checking the amount of water in the water collecting tank, the amount of gas displayed on the flow sensor, and the pressure value displayed on the pressure sensor.

[0029] The method for detecting leakage channels of reservoir dams proposed in this embodiment is compared with conventional detection methods, as shown in the following table:

[0030]

[0031] It can be seen from the above table that the detection method of the present application can accurately determine the leakage channel compared with the conventional detection method. Through the measurement value, the leakage situation of the leakage channel can be judged, which provides convenience for subsequent repair work and meets the use requirements.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for detecting leakage channels of reservoir dams, characterized in that: The following steps are involved: S1: First, geophysical exploration methods are used to detect leakage areas or disputed leakage areas on the dam; S2: Drill holes in a reasonable arrangement in the leakage area or disputed leakage area described in S1 using a drill bit, and drill the holes to the leakage elevation of the leakage area; S3: a shielding cover is arranged around the borehole to shield the borehole, a connecting pipe is connected to the top of the shielding cover, a drainage end of the connecting pipe is connected to a transparent water collecting tank, and a pressure sensor is inserted into the shielding cover; S4: Select a drill rod connected to an air compressor, insert the drill rod into the shielding cover, connect a flow sensor between the air outlet of the air compressor and the drill rod, use the air compressor and the drill rod to blow air into the borehole described in S2, measure the amount of the blown gas through the flow sensor, and detect the pressure in the borehole through the pressure sensor; S5: Select a timer, and start the timer to count while blowing; S6: During the blowing process, the air pressure in the borehole described in S3 is gradually increased, and under the action of the air pressure, the water in the borehole is sprayed upward, and the sprayed water enters the transparent water collecting tank through the shielding cover and the connecting pipe described in S3; S7: By observing the value displayed on the timer, when a certain time interval is reached, stop blowing, and by observing the amount of water in the transparent water collecting tank in S6, determine whether the borehole is a leakage channel; S8: Determine the leakage condition of the leakage channel by checking the amount of water in the water collecting tank, the amount of gas displayed on the flow sensor, and the pressure value displayed on the pressure sensor.

2. A method for detecting leakage channels of reservoir dams according to claim 1, characterized in that: In S2, the diameter of the borehole is 70-80 cm.

3. A method for detecting leakage channels of reservoir dams according to claim 1, characterized in that: In S3, a scale line is provided on the front side of the transparent water collecting tank for measuring the amount of water in the transparent water collecting tank.

4. A method for detecting leakage channels of reservoir dams according to claim 1, characterized in that: In S4, the top and bottom ends of the drill rod are both open and connected.

5. The method for detecting leakage channels of reservoir dams according to claim 1, characterized in that: In S3, the shielding cover is made of hard plastic, and the connecting pipe is made of a flexible hose.

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