Evaluating the effectiveness of the MASW technique in a geologically complex terrain

摘要: MASW surveys carried at a number of sites in Pulau Pinang, Malaysia, showed complicated dispersion curves which consequently made the inversion into soil shear velocity model ambiguous. This research work details effort to define source these curves. As starting point, complexity phase spectrum is assumed be due either surveying parameters or elastic properties structures. For former, was out using different parameters. The complexities were persistent for parameters, an indication that structure could reason. In order exploit this assumption, synthetic modelling approach adopted information from borehole, literature and geologically plausible models. Results suggest presence irregular variation stiffness layers, high contrast relatively shallow bedrock, results quite complex f-v spectrum, especially frequencies lower than 20Hz, making it difficult accurately extract curve below frequency. such, technique, geological situations as demonstrated, great care should taken during data processing obtain depicts subsurface.