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A combined geophysical method for detecting hidden dangers in seawall engineering

A composition and seawall technology, applied in electromagnetic wave detection, measuring devices, and re-radiation, can solve the problem of not being able to quickly and accurately determine the location of hidden dangers

Inactive Publication Date: 2015-12-09
ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

[0002] Traditional hidden danger detection methods such as geological drilling and manual detection cannot quickly and accurately determine the location of hidden dangers, and drilling is localized and destructive
With the development of technology, in the past 20 years, non-destructive detection based on physical detection method has achieved many research results in hidden danger detection technology of embankment engineering. It is difficult for the instrument to be completely suitable for the detection of hidden dangers in embankment engineering. Using different instruments for simultaneous detection, mutual verification and supplementation can effectively improve the accuracy and reliability of interpretation, which is a reasonable development direction for dike hidden danger detection
Although there is no essential difference in principle between the physical detection method of seawall engineering safety and the hidden danger detection of embankment, due to the particularity of the project itself and environmental conditions, there are differences in field test technology and data interpretation and judgment.

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  • A combined geophysical method for detecting hidden dangers in seawall engineering

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with accompanying drawing.

[0013] Earth conductivity measurement is a telemetry method that solves practical problems by studying the spatial and temporal distribution characteristics of the electromagnetic field based on the difference in the conductivity of the underground medium. It belongs to a low-frequency electromagnetic method whose operating frequency is between audio frequency ( n ×10~ n ×10 4 HZ) range. Hidden dangers in the embankment (such as weak layers, loose soil, water flow channels, etc.), or changes in the medium type of the embankment and its structure, porosity, compactness, moisture content, etc., will lead to changes in the conductivity structure of the underground medium. Therefore, the temporal and spatial distribution characteristics of electrical conductivity can be quickly detected through the ground conductivity meter, so as to judge the heterogeneity of the dike body....

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Abstract

The invention discloses a method for comprehensively geographically exploring hidden trouble of seawall engineering. The method includes exploring conductivities a seawall body at the depths of 7.5m and 15m by the aid of ground conductivity meters at exploration intervals of 10m, primarily processing monitoring data and initially locating regions corresponding to points with abnormal conductivity values; acquiring precise images of geological conditions of the regions with abnormal conductivities of the seawall body by the aid of ground penetrating radar and processing the images; analyzing possible reasons for the abnormal conductivities according to the acquired underground images, which are reflected by the ground penetrating radar, of the regions with the abnormal conductivity values, and finding out distribution of abnormal substance layers and local abnormal substances which affect abrupt change of permeability coefficients of the seawall body; rectifying and reforming an embankment with the geological safety hidden trouble. The method has the advantages that the ground conductivity meters are used with the ground penetrating radar, so that merits of instruments can be mined to the greatest extent, shortcomings of the instruments are overcome, the hidden trouble and leakage can be expectedly quickly and effectively explored, and danger can be managed in a targeted manner.

Description

technical field [0001] The invention relates to the field of seawall engineering hidden danger detection, in particular to a composite geophysical exploration method for seawall engineering hidden danger detection. Background technique [0002] Traditional hidden danger detection methods such as geological drilling and manual detection cannot quickly and accurately determine the location of hidden dangers, and drilling is localized and destructive. With the development of technology, in the past 20 years, non-destructive detection based on physical detection method has achieved many research results in hidden danger detection technology of embankment engineering. It is difficult for the instrument to be completely suitable for the detection of hidden dangers in embankment engineering. Using different instruments for simultaneous detection, mutual verification and supplementation can effectively improve the accuracy and reliability of interpretation, which is a reasonable dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/02G01V3/12G01S13/89
Inventor 秦鹏秦植海陈晓东陈斌周建芬张晓悦吴胜文曹鑫杜程晨
Owner ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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