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http://dx.doi.org/10.7582/GGE.2014.17.2.104

Application of Inversion Methods to Evaluate the State of Soft Soil using Electrical Resistivity Monitoring Data  

Ji, Yoonsoo (Department of Energy and Resources Engineering, Kangwon National University)
Oh, Seokhoon (Department of Energy and Resources Engineering, Kangwon National University)
Im, Eunsang (Infrastructure Technology Center, K-Water Institute)
Publication Information
Geophysics and Geophysical Exploration / v.17, no.2, 2014 , pp. 104-113 More about this Journal
Abstract
Electric resistivity monitoring was applied to evaluate the soft ground in reclaimed land in order to figure out the applicability of physical prospecting. For this, electrical resistivity monitoring data were acquired for total three months and analyzed those data with independent inversion, time-lapse inversion, and 4D inversion methods. The result was compared for various inversion methods so as to figure out what showed the soft soil most properly. Moreover, drilling and CPT(Cone Penetration Test) data were also used in order to find out if each of those inversion methods could distinguish either bed rock or the soft soil clearly. And according to the result, time-lapse inversion showed less inversion artifacts than independent inversion, so it could indicate the soft soil better. If data gained for a longer period than three months are used, 4D inversion has been found to be a more efficient analysis method than the time-lapse inversion method. Electrical resistivity monitoring on the soft soil has been found to be a useful method that can analyze the spatio-temporal electric state of the ground serially.
Keywords
soft soil; electrical resistivity monitoring; Time-lapse inversion; 4D inversion;
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