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Dam leakage detection method

A detection method and dam technology, which are applied in measurement devices, processing response signals of detection, instruments, etc., to achieve the effects of strong electromagnetic interference capability, good detection directionality, and strong resistance to surface wave interference and external electromagnetic interference.

Inactive Publication Date: 2020-06-05
湖南北斗微芯产业发展有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commonly used methods are: DC resistivity method, natural electric field method, transient electromagnetic method, ground penetrating radar method, pseudo flow field method, temperature field method, isotope tracer method, etc. These methods have certain limitations

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Embodiment Construction

[0023] Systematic measurement was carried out on the anti-seepage wall of the dam body, and a total of 221 detection points were arranged. The one-meter-thick cement water-resisting layer of the dam body with pile numbers K0+488 to K0+38 was systematically tested. The total length of the corridor is 488 meters, which consists of a horizontal corridor with an altitude of 1366.60 meters and the The grouting slope corridor is composed of a grouting corridor with a slope of 1:2.857. The distance between measuring points in the corridor is 1.5 or 2 meters.

[0024] Vibration sensors and vibration acquisition instruments are used to detect the detection points. During measurement, the vibration sensor is placed on the surface of the detection point, and plasticine is adhered to the base of the sensor, so as to enhance the coupling between the sensor and the dam body and facilitate the horizontal alignment of the sensor. After horizontal alignment, the intensity of the elastic wave...

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Abstract

The invention discloses a dam leakage detection method, which relates to the technical field of water conservancy and hydropower, in particular to a dam leakage detection method. The principle for detecting dam body leakage is based on the fact that when a water body with pressure flows through a crack or a pipeline in a dam wall body, friction is generated with the wall body to generate elastic waves, and the elastic waves with different frequencies and energy are spread upwards along a wall body medium. Because the attenuation of low-frequency elastic waves is small, the low-frequency elastic waves can be propagated upwards for a long distance along a wall body medium. Therefore, the energy of the elastic wave is detected along the trend of the dam body, and the position below the position corresponding to the maximum point is the position of a crack or a pipeline in the wall body. Due to a leakage point direct measurement principle, compared with an electromagnetic measurement principle, direct and accurate positioning can be realized by adopting a mode of detecting elastic waves, and the problem of multiple solutions of results does not exist. The method is suitable for dam leakage detection, especially for detection of low and medium-frequency infrasound waves in the dam.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower, in particular to a dam leakage detection method. Background technique [0002] my country has a vast area of ​​rivers and a large number of water conservancy and hydropower stations. During the operation of water conservancy and hydropower stations, they have played a huge role in irrigation, flood control, drinking water and power generation, and have achieved remarkable social and economic benefits. [0003] The dam is the most important project in water conservancy and hydropower projects. The safety and stability of the dam plays a very important role in the entire water conservancy and hydropower project. Therefore, the safety and stability of the dam must be ensured during the operation of the water conservancy and hydropower project. The main disease of the dam is leakage, which will have an important impact on the stability of the dam. If the disease is not detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/24G01N29/46
CPCG01N29/24G01N29/46G01N2291/023G01N2291/02441
Inventor 杨世忠
Owner 湖南北斗微芯产业发展有限公司
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