Influence of sample conditions on shear wave velocity measurements in a sedimentary stiff clay

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Influence of sample conditions on shear wave velocity measurements in a sedimentary stiff clay. / Janusz, Paulina Agnieszka; Sørensen, Kenny Kataoka; Clausen, O.R.; Andresen, Katrine Juul.

I: Marine Georesources & Geotechnology, 2020.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

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@article{d052819cccd04ea2a63264c1680c7901,
title = "Influence of sample conditions on shear wave velocity measurements in a sedimentary stiff clay",
abstract = "The study presented in this paper aims to investigate the prospects of using bender elements in the offshore industry for determining shear wave velocity of fragmented, fragile and brittle clay samples and cuttings. The result from the study shows that the laboratory-measured S-wave velocities of intact samples of S{\o}vind Marl, a sedimentary stiff Palaeogene clay, in general, are lower than those determined from in-situ seismic cone penetration testing. The reason may be unavoidable volume-constant distortion and changes to effective stress conditions experienced by the natural clay upon sampling and subsequent sample preparation. Correlation between the size of the samples and velocity is not noticed. In contrast, the S-wave velocities for natural samples that were remoulded and then reconstructed are observed to be comparable with the in-situ seismic measurements, however, the results are found to be dependent on sample density. The influence of cross-talk, near-field, and boundary effects on the results is assessed. ",
keywords = "offshore constructions, clay sediments, shear wave velocity, bender elements",
author = "Janusz, {Paulina Agnieszka} and S{\o}rensen, {Kenny Kataoka} and O.R. Clausen and Andresen, {Katrine Juul}",
year = "2020",
doi = "10.1080/1064119X.2020.1711833",
language = "English",
journal = "Marine Georesources and Geotechnology",
issn = "1064-119X",
publisher = "Taylor & Francis Inc.",

}

RIS

TY - JOUR

T1 - Influence of sample conditions on shear wave velocity measurements in a sedimentary stiff clay

AU - Janusz, Paulina Agnieszka

AU - Sørensen, Kenny Kataoka

AU - Clausen, O.R.

AU - Andresen, Katrine Juul

PY - 2020

Y1 - 2020

N2 - The study presented in this paper aims to investigate the prospects of using bender elements in the offshore industry for determining shear wave velocity of fragmented, fragile and brittle clay samples and cuttings. The result from the study shows that the laboratory-measured S-wave velocities of intact samples of Søvind Marl, a sedimentary stiff Palaeogene clay, in general, are lower than those determined from in-situ seismic cone penetration testing. The reason may be unavoidable volume-constant distortion and changes to effective stress conditions experienced by the natural clay upon sampling and subsequent sample preparation. Correlation between the size of the samples and velocity is not noticed. In contrast, the S-wave velocities for natural samples that were remoulded and then reconstructed are observed to be comparable with the in-situ seismic measurements, however, the results are found to be dependent on sample density. The influence of cross-talk, near-field, and boundary effects on the results is assessed.

AB - The study presented in this paper aims to investigate the prospects of using bender elements in the offshore industry for determining shear wave velocity of fragmented, fragile and brittle clay samples and cuttings. The result from the study shows that the laboratory-measured S-wave velocities of intact samples of Søvind Marl, a sedimentary stiff Palaeogene clay, in general, are lower than those determined from in-situ seismic cone penetration testing. The reason may be unavoidable volume-constant distortion and changes to effective stress conditions experienced by the natural clay upon sampling and subsequent sample preparation. Correlation between the size of the samples and velocity is not noticed. In contrast, the S-wave velocities for natural samples that were remoulded and then reconstructed are observed to be comparable with the in-situ seismic measurements, however, the results are found to be dependent on sample density. The influence of cross-talk, near-field, and boundary effects on the results is assessed.

KW - offshore constructions

KW - clay sediments

KW - shear wave velocity

KW - bender elements

UR - http://www.scopus.com/inward/record.url?scp=85078449886&partnerID=8YFLogxK

U2 - 10.1080/1064119X.2020.1711833

DO - 10.1080/1064119X.2020.1711833

M3 - Journal article

AN - SCOPUS:85078449886

JO - Marine Georesources and Geotechnology

JF - Marine Georesources and Geotechnology

SN - 1064-119X

ER -