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http://dx.doi.org/10.12652/Ksce.2010.30.1C.045

Hybrid Integration of P-Wave Velocity and Resistivity for High-Quality Investigation of In Situ Shear-Wave Velocities at Urban Areas  

Joh, Sung-Ho (중앙대학교 건설환경공학과)
Kim, Bong-Chan (롯데건설(주) 기술연구원)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.30, no.1C, 2010 , pp. 45-51 More about this Journal
Abstract
In urban area, design and construction of civil engineering structures such as subway tunnel, underground space and deep excavation is impeded by unreliable site investigation. Variety of embedded objects, electric noises and traffic vibrations degrades the quality of site investigation, whatever the site-investigation technique would be. In this research, a preliminary research was performed to develop a dedicated site investigation technique for urban geotechnical sites, which can overcome the limitations of urban sites. HiRAS (Hybrid Integration of Surface Waves and Resistivity) technique which is the first outcome of the preliminary research was proposed in this paper. The technique combines surface wave as well as electrical resistivity. CapSASW method for surface-wave technique and PDC-R technique for electrical resistivity survey were incorporated to develop HiRAS technique. CapSASW method is a good method for evaluating material stiffness and PDC-R technique is a reliable method for determination of underground stratification even in a site with electrical noise. For the inversion analysis of HiRAS techniuqe, a site-specific relationship between stress-wave velocity and resistivity was employed. As for outgrowth of this research, the 2-D distribution of Poisson's ratio could be also determined.
Keywords
urban site; resistivity; surface wave; Poisson's ratio; shear-wave velocity;
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Times Cited By KSCI : 2  (Citation Analysis)
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