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http://dx.doi.org/10.7582/GGE.2016.19.4.187

Geostatistical Integrated Analysis of MASW and CPTu data for Assessment of Soft Ground  

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.19, no.4, 2016 , pp. 187-199 More about this Journal
Abstract
In order to delineate the soft ground distribution, an integrated geostatistical analysis was performed using the MASW (Multichannel Analysis of Surface Wave) which has the information of overall region and CPTu (Piezo Cone Penetration Test) which provides the direct information of the measuring point of the ground. MASW results were known to have close relationship with the ground stiffness. This correlation was confirmed through the comparison of MASW data obtained from two survey lines to the laboratory test with extracted soil samples. 3D physical property distribution in the study area was acquired by geostatistical integrated analysis with the data of tip resistance ($q_c$) and pore pressure (u) from the CPTu obtained at 6 points within the study area. The integrated analysis was conducted by applying the COSGSIM (Sequential Gaussian Co-Simulation) technology which can carry out the simulation in accordance with the spatial correlation between the MASW results and both tip resistance and pore pressure. Besides the locations of CPTu, borehole investigations were also conducted at two different positions. As a result, the N value of SPT and borehole log could be secured, so these data were used for the analysis of the geotechnical engineering accuracy of the integrated analysis result. For the verification of reliability of the 3D distribution of tip resistance and pore pressure secured through integrated analysis, the geotechnical information gained from the two drilling areas was compared, and the result showed extremely high correlation.
Keywords
soft ground; MASW; CPTu; geostatistics;
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Times Cited By KSCI : 2  (Citation Analysis)
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