Three-dimensional magnetic measurement specific resistance detecting device and method of embankment leakage passage

Abstract

According to a designed three-dimensional magnetic measurement specific resistance detecting device of an embankment leakage passage, an electric field cathode rod and an electric field anode rod of the three-dimensional magnetic measurement specific resistance detecting device are arranged on the inner side and the outer side of an embankment body correspondingly, an anode excitation signal communication end of an excitation signal sending device is connected with the electric field cathode rod, and a cathode excitation signal communication end of the excitation signal sending device is connected with the electric field anode rod; a magnetic field measuring system is arranged at the top of the embankment body, moves along a measuring line set, and receives magnetic field data of full-space range change caused by power supply electric field change of the excitation signal sending device at all measuring points of the measuring line set, and position positioning data of the measuring points where the magnetic field measuring system is located, and the measuring line set is located at the top of the embankment body, and arranged in the traveling direction of an embankment; and the magnetic field measuring system is used for carrying out magnetic measurement data processing according to the received magnetic field data and positioning data of all the measuring points to obtain position positioning information of all the measuring points and magnetic specific resistance values corresponding to all the measuring points. The positions of the leakage passage can be obtained accurately.

Description

technical field [0001] The invention relates to the technical field of geophysical detection, in particular to a three-dimensional magnetic resistivity detection device and method for a dike leakage channel. technical background [0002] The quality and safe operation of embankment projects are related to the safety of people's lives and property on both sides of the Strait. However, due to the complex structure of embankments and the long history of construction, there are common safety hazards such as leakage. The detection of seepage channels has always been the focus and difficulty of dike hidden danger detection. At present, the detection methods of leakage hidden dangers can be divided into three categories: one is based on the electrical difference between the leakage channel and the surrounding medium, that is, the good conductivity of the leakage water, and the use of electrical exploration to find out the distribution of leakage, mainly transient Electromagnetic m...

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Problems solved by technology

The acoustic emission method is based on the sound of water flow and friction between water and soil when the embankment leaks, and uses acoustic emission to locate the leakage channel, but this method can only describe qualitatively

The third method is to use multiple repeated detections to monitor the dynamic change process of embankment seepage and track the occurrence and development of embankment seepage. However, embankment safety monitoring is a long-term process, and it is difficult to play an emergency rescue role.

[0003] Generally speaking, the current methods and technologies used for dike seepage detection have their own advantages and disadvantages. Although some achievements have been made, there are still many deficiencies in research work such as the accurate positioning of dike seepage channels and the quantitative interpretation of detection results.

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