Dike hidden danger nondestructive detection method based on multi-technology cooperation

Abstract

The invention relates to the technical field of embankment safety, in particular to an embankment hidden danger nondestructive detection method based on multi-technology collaboration, and the method is composed of a ground penetrating radar method, a transient electromagnetic method and a magnetic resonance technology method.For shallow embankment hidden dangers, direct image response can be achieved through the ground penetrating radar method; deep hidden dangers are checked in detail by adopting a transient electromagnetic method; for leakage and piping which are most likely to cause embankment bursting in embankment hidden dangers, underground water is directly and effectively detected by adopting a magnetic resonance spectroscopy (MRS) method. The resistivity data of each stratum detected in the transient electromagnetic method can be directly used as a parameter for inversion of the magnetic resonance technology, so that the result is more unique. By combining a ground penetrating radar method, a transient electromagnetic method and a magnetic resonance technology, the positions of water-containing areas such as hidden dangers, leakage and piping in the deep and shallow parts of the dike can be accurately positioned, so that the hidden dangers of the dike can be timely and effectively treated.

Description

technical field [0001] The invention relates to the technical field of embankment safety, in particular to a non-destructive detection method for embankment hidden dangers based on multi-technical coordination, more specifically, a comprehensive geophysical detection method composed of ground penetrating radar imaging technology, transient electromagnetic method and magnetic resonance technology method . Background technique [0002] Dangerous situation detection of embankments is an important link in river management and protection of life and property safety of people along the river. The main methods of dangerous situation detection in embankments are: ground penetrating radar imaging technology, high-density resistivity method, surface wave method, transient electromagnetic method, high Density resistance method, natural electric field method, nuclear magnetic resonance technology, etc. [0003] At present, most of the dike danger detection adopts a single geophysical m...

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Problems solved by technology

However, its detection depth is shallow, and the complexity and diversity of underground media affect the accuracy of GPR image interpretation.

[0005] The transient electromagnetic method is accurate in positioning, has a large detection depth, and is not affected by terrain. It can observe the distribution of geological structures and the division of stratigraphic sequences in embankments, but the response to shallow uneven abnormal objects is not obvious enough.

[0006] Although magnetic resonance technology has the advantages of directly detecting water leakage and distinguishing abnormalities in low-resistivity areas of rock formations, and can quantitatively obtain various parameters such as layered water content, porosity, and permeability coefficient, it is limited by the detection principle. When the method is used for detection, it is easily affected by the surrounding electromagnetic field environment, noise and other environments, and its two-dimensional / three-dimensional imaging technology is still in the research and exploration stage, and the resolution of the obtained one-dimensional results is insufficient. It is difficult to accurately determine the location of the leak when used alone

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