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Parametric Studies for Measurements of Dynamic Properties of Soils Using Inhole type CPTu  

Jang, In-Sung (Coastal Development and Ocean Energy Department, KORDI)
Kwon, O-Soon (Coastal Development and Ocean Energy Department, KORDI)
Kim, Byoung-Il (Dept. of Civil & Envirnmental Engrg., MyongJi Univ.)
Lee, Seung-Hyun (Dept. of Civil Engrg., SunMoon Univ.)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.20, no.6, 2008 , pp. 523-531 More about this Journal
Abstract
In hole type CPTu equipment which combines the concepts of inhole test method and piezocone test method was newly developed in order to evaluate the dynamic properties of marine soils. It is possible to perform inhole type CPTu without any additional source device because the source and receiver are contained inside the cone rod, which is different from the conventional seismic cone system. In this study, laboratory tests using kaolinite as soft soil and numerical simulations using finite element method were carried out to investigate the effects of several parameters including test methods and soil conditions on the test results from inhole type CPTu and to find out the optimum test method. It was found that it is necessary to maintain the length of swing arm as well as the distance between source and receiver consistently to obtain the rigorous test results. The laboratory test and numerical results also reveal that contrary to the input wave frequency, the water content of soil layer and the disturbance due to the installation of swing arm apparently affect the shear wave velocity.
Keywords
Inhole type CPTu; Bender element; Laboratory tests; Numerical simulations; shear wave velocity;
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Times Cited By KSCI : 4  (Citation Analysis)
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