Continuous moni toring technology of parallel electrical method for the infiltration characteristics in the dam body
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Abstract:
The infiltration characteristics of dam body is an impo rtant index of reservoir safety test. The routine testing methods have the shortcoming s such as lack o f enoug h measuring points, high cost, and vulnerability, thus they cannot produce economic benefits. Accord2 ing to the relationship between the measured resistivity and soil moisture content, we put forw ar d a new idea of using the parallel electri2 cal technology to continuously test the infiltration characteristics of dam body. Based on the numer ical simulation of response characteris2 tics of dam resistivity caused by w ater level variation in the dam body and the laboratory physical model test, the parallel electric tech2 nique can be used to monito r the dynamic pro cess of dam w ater level var iatio n. According to the variation r ate of resistivity measured in the same monitoring po int before and after water level variatio n and the ratio parameter analysis technique of vertical resistivity meas2 ured in different positions of surv ey line, we can visually calibrate the position of water level in the dam body. The in2situ monitor ing re2 sults proved the feasibility of the parallel electr ic technolog y in detecting the infiltration characteristics of dam body , which can prov ide powerful technique support for the safety evaluation and treatment of r eservo ir dam.
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