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http://dx.doi.org/10.9720/kseg.2016.3.339

Interpretation of Geophysical and Engineering Geology Data from a Test Site for Geological Field Trip in Jeungpyung, Chungbuk  

Kim, Kwan-Soo (Dept. of Earth and Environmental Sciences, Chungbuk National University)
Yun, Hyun-Seok (Dept. of Earth and Environmental Sciences, Chungbuk National University)
Sa, Jin-Hyeon (Dept. of Earth and Environmental Sciences, Chungbuk National University)
Seo, Yong-Seok (Dept. of Earth and Environmental Sciences, Chungbuk National University)
Kim, Ji-Soo (Dept. of Earth and Environmental Sciences, Chungbuk National University)
Publication Information
The Journal of Engineering Geology / v.26, no.3, 2016 , pp. 339-352 More about this Journal
Abstract
The best way of investigating the physical and mechanical properties of subsurface materials is the combined interpretation of data from borehole geophysical surveys and geotechnical experiments with rock samples. In this study two surface seismic surveys with refraction and surface-wave method are alternatively conducted for downhole seismic surveys in test site for geological field trip in Jeungpyung, Chungbuk. P- and S-wave velocity structures are delineated by refraction and MASW (multichannel analysis of shear waves) methods, respectively. Possion's ratio section, reconstructed from P- and S-wave velocities, is correlated to the outcrop geological features consisting of reddish sedimentary rock, gray volcanic rock, and joints/fractures. In addition, rock samples representative for reddish sedimentary and gray volcanic features are geotechnically analyzed to provide physical, mechanical properties, and elastic modulus. Dynamic elastic moduli estimated from geophysical data is found to be higher than the one from geotechnical data. Reddish sedimentary rock characterized with low porosity and moisture content corresponds to the zone of low electrical resistivities and their small variations in the resistivity sections between the rainy and dry days. This trend suggests that the weathered gray volcanic rock and the nearby fractures with higher low porosity and moisture content are interpreted to be good carrier especially in rainy season.
Keywords
seismic refraction; MASW; seismic velocities; unconfined compression test; elastic moduli;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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