Geotechnical seismic site characterization of deep alluvial sand sites in the South Iceland Lowland
Geotechnical seismic site characterization of deep alluvial sand sites in the South Iceland Lowland
Thick deposits of post-glacial sediments are widely found along the coastline and close to main riverbeds in South Iceland. This work studies the feasibility of using a joint inversion of dispersion and ellipticity curves to characterize deep alluvial sand sites in the South Iceland Lowland. For this purpose, MASW (Multichannel Analysis of Surface Waves), small-aperture MAM (Microtremor Array Measurements) and MHVSR (Microtremor Horizontal-to-Vertical Spectral Ratio) field tests were conducted at selected locations along the Markarfljót River. The results provide the ?? profiles of the tested sites down to bedrock level at 120‒190 m depth, along with the fundamental frequency (?0) of the soil strata. Furthermore, simple correlations between ?0 and bedrock depth are evaluated against the measurement results, in order to identify suitable relationships for preliminary assessment of bedrock depths based on MHVSR measurements in South Iceland.
Elin Asta Olafsdottir; Sigurdur Erlingsson; Bjarni Bessason
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
B - Geohazards
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