Combination of dispersion curves from MASW measurements
| Autor: | Elin Asta Olafsdottir, Sigurdur Erlingsson, Bjarni Bessason |
|---|---|
| Přispěvatelé: | Umhverfis- og byggingarverkfræðideild (HÍ), Faculty of Civil and Environmental Engineering (UI), Verkfræði- og náttúruvísindasvið (HÍ), School of Engineering and Natural Sciences (UI), Háskóli Íslands, University of Iceland |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Confidence intervals
Multichannel analysis of surface waves 0211 other engineering and technologies Measurement profile configuration Method Soil Science 02 engineering and technology Seismic 010502 geochemistry & geophysics 01 natural sciences Physics::Fluid Dynamics Soil symbols.namesake Dispersion curves Rayleigh scattering Uncertainty analysis 021101 geological & geomatics engineering 0105 earth and related environmental sciences Civil and Structural Engineering Measurement Geofysik Wave velocity Geotechnical Engineering and Engineering Geology Seismic exploration Bootstrap Jarðskjálftaverkfræði Geophysics Shear (geology) Stacking Surface wave Combination symbols MASW Geology Seismology |
| Popis: | Publisher's version (útgefin grein) Multichannel analysis of surface waves (MASW) is a seismic exploration method for determination of near-surface shear wave velocity profiles based on analysis of horizontally travelling Rayleigh waves. This paper aims to propose a methodology and recommendations for combining dispersion data from several multichannel records. The dispersion curves are added up within logarithmically spaced wavelength intervals and the uncertainty of the mean phase velocity estimates is evaluated by using classical statistics and the bootstrap. The results indicate that combining multiple dispersion curves, which have been gathered by receiver spreads of different lengths (but with the same midpoint), can increase the investigation depth of the survey, improve its resolution at shallow depth and overall improve the reliability of the results as compared to the use of a single record. Moreover, the uncertainty of the combined mean dispersion curve can be determined and further used to present the shear wave velocity profile with upper and lower boundaries. This work was supported by the University of Iceland Research Fund [Grant no. 73077]; the Icelandic Road and Coastal Administration [Grant no. 1800-373]; and the Energy Research Fund of the National Power Company of Iceland [Grant no. NYR-18-2017]. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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