In situ shear wave velocity from multichannel analysis of surface waves (MASW) tests at eight Norwegian research sites

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Title: In situ shear wave velocity from multichannel analysis of surface waves (MASW) tests at eight Norwegian research sites
Authors: Long, Michael (Michael M.)
Donohue, Shane
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Date: May-2007
Abstract: The Multichannel Analysis of Surface Waves (MASW) technique, used to determine shear wave velocity (Vs) and hence small strain stiffness (Gmax), has recently generated considerable interest in the geophysics community. This is because of the ease of carrying out the test and analysis of the data. The objective of this work was to assess the repeatability, accuracy and reliability of MASW surface wave measurements for use in engineering studies. Tests were carried out at 8 wellcharacterised Norwegian clay, silt and sand research sites where Vs had already been assessed using independent means. As well as being easy and quick to use MASW gave consistent and repeatable results and for the clay sites the MASW Vs profiles were similar to those obtained from other techniques. Reasonable results were also obtained for the silt and sand sites, with the best result being obtained for the finer silt. This work also confirms that MASW Vs clay profiles are comparable to those obtained by correlation with CPT. For these sites there also seems to be a good correlation between normalised small strain shear modulus and in situ void ratio or water content and the data fit well with published correlations for clays.
Funding Details: Health Research Board
Type of material: Journal Article
Publisher: NRC Research Press
Copyright (published version): 2007 NRC Canada
Keywords: Soft claysSiltsSandsSmall strain stiffnessShear wave velocity
Subject LCSH: Clay--Testing
Shear strength of soils--Testing
Shear waves
DOI: 10.1139/t07-013
Language: en
Status of Item: Peer reviewed
Appears in Collections:Urban Institute Ireland Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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