The Application of Distributed Acoustic Sensing for Shallow Marine Investigations – an Intertidal Case Study

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Title: The Application of Distributed Acoustic Sensing for Shallow Marine Investigations – an Intertidal Case Study
Authors: Trafford, AndrewDonohue, ShaneEllwood, R.Godfrey, A.Wacquier, Loris
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Date: 2-Sep-2021
Online since: 2022-01-21T16:18:28Z
Abstract: Typically, there is a paucity of geotechnical information available to designers of offshore foundations for marine renewable structures, which often results in highly conservative designs. Recent innovations offshore (e.g. McGrath et al. 2016; Long et al. 2020)) seismic surface wave (SW) measurements have highlighted their potential for providing offshore geotechnical information, thereby reducing design uncertainty. There is also an increasing recognition of the value of these measurements from the geotechnical industry, with Lunne (2013) recommending that measurements of seismic shear wave velocities (Vs) should be standard practice for important offshore site investigations. Vs is related to the small strain shear modulus Gmax, which is a critical input parameter for several applications, including static and dynamic analysis of foundation systems, soil liquefaction analysis and input for advanced constitutive soil models. The main disadvantage of current offshore SW practice is a relatively slow data acquisition procedure, which, in turn reduces the spatial coverage of the approach.
Funding Details: European Commission - European Regional Development Fund
Science Foundation Ireland
Funding Details: Geological Survey of Ireland (GSI)
Optasense Limited
Type of material: Conference Publication
Publisher: European Association of Geoscientists & Engineers
Copyright (published version): 2021 EAGE Publications
Keywords: Distributed acoustic sensing (DAS)Seismic surface wavesOffshore geotechnical investigations
DOI: 10.3997/2214-4609.202120142
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Language: en
Status of Item: Peer reviewed
Is part of: NSG2021 27th European Meeting of Environmental and Engineering Geophysics
Conference Details: Near Surface Geoscience 2021(NSG'21):The 27th European Meeting of Environmental and Engineering Geophysics, Bordeaux, France (and Online), 29 August - 2 September 2021
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Appears in Collections:Civil Engineering Research Collection
ICRAG Research Collection

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