Multi-dimensional detection apparatus and method of exploring riverway karst cave

Abstract

The invention, which belongs to the evaluation field of geological disasters of water conservancy projects, especially relates to a measurement arrangement system for exploring a riverway karst cave and implementation method thereof, particularly to a multi-dimensional detection method for diagnosing a karst body hidden in a riverway by using a parallel electrical method. The multi-dimensional arrangement apparatus for exploring riverway karst body distribution comprises a test system and a test instrument. The test system consists of two multi-core cable lines arranged at two river embankments in parallel, infinity B electrodes corresponding to the single multi-core cable line, and potential reference N electrodes. 64 electrodes are arranged at each multi-core cable line; and each electrode channel is connected with the ground by a copper rod. The test instrument is a parallel electric method instrument. According to the multi-dimensional detection apparatus and method of exploring a riverway karst cave, because of utilization of the parallel electric method detection technology, the work efficiency of the conventional resistivity method is improved; with an interpreting technique based on combination of a two-dimensional apparent resistivity image and three-dimensional inversion imaging, the karst cave exploration precision is improved and defects in the prior art are overcome.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering geological hazard evaluation, in particular to a measurement arrangement system and an implementation method for detecting river channel karst caves, in particular to a multi-dimensional detection method for diagnosing hidden karst bodies in a channel by using a parallel electrical method. Background technique [0002] The development and distribution of karst in my country is relatively extensive, which creates a strange natural scene, but also brings a series of geological disasters to the safe implementation of the project, especially when the groundwater level rises and falls and human pumping and drainage of groundwater jointly lead to the subsidence of hidden karst areas on the ground . Therefore, it is necessary to clarify the distribution characteristics of unfavorable karst bodies in river channel engineering treatment in karst areas, so as to reduce the risk of engineering dis...

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Problems solved by technology

The three-dimensional high-density electrical method has made great progress in the application of engineering exploration. The three-dimensional resistivity image can be obtained through tomography technology. However, the high-density electrical method still adopts the serial acquisition mode, which has high acquisition efficiency and a small amount of data, which is not conducive to river channels. Long route detection, and less application in the investigation of river karst areas, mainly limited by the constraints of the river channel site, it is difficult to deploy a conventional observation system in the riverbed waters; the on-site acquisition efficiency is low, and the advantages of rapid measurement cannot be exerted; and the three-dimensional resistance The rate method needs to collect a huge amount of data, and there is no reasonable interpretation method for massive data

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