A study on feasibility of surface wave application for the assessment of physical properties of dam
Author(s)
김형수; 민동주; 김중열; 하익수; 오석훈
Alternative Author(s)
민동주
Publication Year
2005-03-26
Abstract
Three dimensional finite difference elastic wave model wave developed to estimate the feasibility of surface wave applications in geotechnical problems. The wave motions calculated by the developed program in this study shows good agreement with well known analytic solutions. The surface wave motions calculated from layered dam type structure can be interpreted as an infinite layer structure using dispersion curve but it needs a special source of which high energy in frequency band lower than 10 Hz to get information of physical properties in few tens meter deep. The source which has high energy in the low frequency band, however, can give defect on dam and this will make some limitation in real field applications. The dispersion curves calculated from the surface wave motion of homogeneous and center core type dam models will give rise to fatal errors if the conventional infinite layer structure used in their interpretation because the surrounding materials and boundaries of dam make some distortion in dispersion curve of surface wave. Therefore, it is strongly recommended to use three dimensional inversion model for correct interpretation and estimation of physical properties of dam materials