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Computerized analysis and determination of the theoretical d | 15641
International Research Journals

Computerized analysis and determination of the theoretical dispersion curve of layered media under water for offshore geotechnical and geological explorations

Abstract

Mikaeil Naseri Yalghozaghaji and Touhid Akhlaghi

In offshore geotechnical and geological engineering, the determination of in-situ elastic and geometric properties of ground layers under water is of great importance. The surface wave method is an in-situ nondestructive testing technique used for engineered geotechnical explorations on land and under water. In order to apply the surface wave method under water, a computer program named SWAT has been developed during this research work, by employing the theory of wave propagation in layered media under water, and applied to construct the theoretical dispersion curve of the layered structure model. This theoretical dispersion curve is then used to make the required comparisons with the experimental dispersion curve obtained in the field for the purpose of determining the real site profile. To evaluate the applicability and reliability of the developed program, an artificial layered model as well as two examples of real sites has been studied and the results obtained have been compared with the available actual data. The results show very good match indicating that the developed program is working well and can be used for profiling the offshore sites under investigation.

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