Titill: | Hybrid non-invasive characterization of soil strata at sites with and without embedded lava rock layers in the South Iceland Seismic Zone |
Höfundur: |
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Útgáfa: | 2023-03-28 |
Tungumál: | Enska |
Háskóli/Stofnun: | Háskóli Íslands University of Iceland |
Svið: | Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) |
Deild: | Umhverfis- og byggingarverkfræðideild (HÍ) Faculty of Civil and Environmental Engineering (UI) |
Birtist í: | Bulletin of Engineering Geology and the Environment;82(4) |
ISSN: | 1435-9529 1435-9537 |
DOI: | 10.1007/s10064-023-03136-0 |
Efnisorð: | Shear wave velocity; Surface wave analysis; Rayleigh wave ellipticity; Velocity reversal; Embedded lava-rock layers |
URI: | https://hdl.handle.net/20.500.11815/4951 |
Tilvitnun:Olafsdottir, E.A., Erlingsson, S. & Bessason, B. (2023). Hybrid non-invasive characterization of soil strata at sites with and without embedded lava rock layers in the South Iceland Seismic Zone. Bull Eng Geol Environ 82, 146. https://doi.org/10.1007/s10064-023-03136-0
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Útdráttur:The geological setting of Iceland is unusual, with highly jointed rock mass, loose sediments created in glacial outburst floods and eruptions, and layers of lava-rock embedded in or overlying soft sediments. This study aims to assess the feasibility of a composite analysis of dispersion and ellipticity curves for characterization of two of the primary classes of soil sites in the South Iceland Seismic Zone. Specifically, it seeks to develop a cost-effective workflow to identify and characterize sites where a layer of lava-rock is embedded in the sedimentary stratum at shallow depth, along with deep soil site characterization. Microtremor HVSR (horizontal-to-vertical spectral ratio) is found to be efficient to distinguish between sedimentary sites with and without an embedded lava-rock layer. The results further demonstrate the effectiveness of hybrid ellipticity and dispersion curve inversion to characterize soil sites with an embedded layer of lava-rock, which results in a strong velocity reversal with depth. Consistent with previous studies, the hybrid dispersion-ellipticity inversion is also found efficient for characterization of sites with a simpler structure.
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