Device for improving hardened dam contact and electrical imaging directional detecting method of potential hazard body

Abstract

The invention relates to the field of potential dame risk detection, and particularly relates to a hardened dam potential risk detection method and device applying the parallel electrical survey. The device comprises an electrode for an electrical prospecting apparatus, wherein the frame inside the electrode comprises a copper bar and a transfusion duct; conductive sponge and conductive lint sequentially coat the outer part of the middle part of the electrode. The method and the device have the advantages of convenience in field operation, flexibility in operation, low labor intensity and wide application environment since a charging mode electric hammer is adopted to drill the surface of hardened dam; the drilling hole has a small diameter, so that the work for repairing the hardened surface layer of the dam in later phase can be facilitated.

Description

technical field [0001] The invention relates to the field of detection of hidden dangers in embankments, specifically a method and device for detecting hidden dangers in hardened embankments using parallel electrical methods. Surface hardening facilities such as mountains, ponds, roads, runways, and building grounds, as well as natural or artificial geological bodies such as mountains with exposed bedrock, roadways, and foundation pits. Background technique [0002] The embankment is an important part of the flood control engineering system and the last barrier against floods. With the increase of its service life, the problem of dam leakage becomes more and more prominent. In order to effectively carry out the work of risk elimination and reinforcement, it is necessary to accurately calibrate the location, scope and connection of the leakage hazard. Usually excavation or drilling detection method can find hidden dangers directly, but it will cause irreversible damage to t...

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Problems solved by technology

[0004] In order to solve the problem that the current direct current method is difficult to install electrodes on hardened dams, the invention proposes to use a charging electric hammer to drill holes at a certain distance, insert the invented electrode device into the hole, and use a watering can to drill through the liquid injection hole. The ion solution is injected into the hole to ensure the coupling between the electrode, the hole wall and the soil of the embankment. The electrode and the multi-core test cable are connected by a double-clamp wire, and the data is collected and processed by a parallel electrical instrument. According to different parts of the embankment The combined comparison and analysis of resistivity images from multiple survey stations finally interprets geological information such as the location, range, and connectivity of hidden dangers, providing technical support for hazard elimination and reinforcement

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