ASCE - Improving MASW Results for a Site w Through the Use of Highith Shallow Bedrock

melkat · 06-01-2012, 11:23 AM

Improving MASW Results for a Site with Shallow Bedrock through the Use of Higher‐Mode Data

In a case where the active-source multi-channel analysis of surface waves method was applied to a site consisting of clay residuum overlying basalt bedrock, inversion for the undamental-mode Rayleigh wave results in shear-wave velocities for the rock that are much lower than expected values. preliminary results from multi-mode inversions incorporating data from the 1st and 2nd higher-order modes provide more realistic velocities within the bedrock than could be obtained using the fundamental-mode data alone. However, the model data fit shows much room for improvement. Acquiring, processing and interpreting multi-mode data poses some challenges that need further research.

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