Review of long seabed samplers and criteria for new sampler design

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Show simple item record Lunne, Tom Long, Michael (Michael M.) 2011-08-25T16:13:24Z 2011-08-25T16:13:24Z 2005 Elsevier B.V. en 2006-02
dc.identifier.citation Marine Geology en
dc.identifier.issn 0025-3227
dc.description.abstract A cost efficient way of investigating shallow sediments and for collecting soils data for many offshore geotechnical problems, e.g. anchoring of floating structures with suction piles or evaluation of submarine slope stability, is to carry out seabed sampling to say 25 m below seabed and in addition perform seabed CPTUs to say 40 m. Based on a review of data collated from the literature and from in house project experience at the Norwegian Geotechnical Institute it was found that Kullenberg type piston core samples give poor recovery and samples, which are increasingly disturbed as penetration increase. This means that laboratory tests on these samples will give results that are not representative of in situ conditions and will give incorrect parameters for foundation design. Many different factors control the quality of the samples recovered but the need for an effectively stationary piston a core retainer and improvements to the physical sampler parameters, e.g. diameter / wall thickness ratio, cutting edge angle, inside and outside friction are perhaps the most critical. The importance of each of these factors is discussed in detail in addition to the need for instrumentation and the way to penetrate the sampler. Recommendations are given in terms of criteria for the design of a new sampler, which the authors feel will give better results than most samplers used in practice today. en
dc.description.sponsorship Other funder en
dc.format.extent 742630 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Elsevier en
dc.relation.requires Architecture, Landscape & Civil Engineering Research Collection en
dc.relation.requires Critical Infrastructure Group Research Collection en
dc.relation.requires Urban Institute Ireland Research Collection en
dc.rights This is the author’s version of a work that was accepted for publication in Marine Geology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Marine Geology, 226 (1-2): 145-165 DOI: 10.1016/j.margeo.2005.07.014 en
dc.subject Site investigation en
dc.subject Seabed sampling en
dc.subject Long corers en
dc.subject Sample quality en
dc.subject.lcsh Marine sediments--Sampling en
dc.subject.lcsh Drill core analysis en
dc.title Review of long seabed samplers and criteria for new sampler design en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions en
dc.status Peer reviewed en
dc.identifier.volume 226 en
dc.identifier.issue 1-2 en
dc.identifier.startpage 145 en
dc.identifier.endpage 165 en
dc.identifier.doi 10.1016/j.margeo.2005.07.014
dc.neeo.contributor Lunne|Tom|aut| en
dc.neeo.contributor Long|Michael (Michael M.)|aut| en
dc.description.othersponsorship The Research Council of Norway en

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