Long-term settlements on sensitive clay

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Pages117124; # of pages: 8
Subjectsettlement; sensitive clay; compression; compressive strength; argile sensible; compression; resistance a la compression
AbstractA very light, single-storey building resting on a granular fill over slightly over-consolidated sensitive clay has settled approximately 0.3 metres since it was built 20 years ago. Time-settlement observations suggest that the consolidation in the subsoil is almost completed. Piezometric measurements indicate that the effective stresses in the compressible layer under the building reached a threshold level about equal to the laboratory- measured preconsolidation pressure, and remained at an almost constant value for many years while consolidation continued. This observation is shown to be consistent with several other case records where effective stresses in the field have been related to laboratory measurements of compression. It provides further support for the concept that pore pressures are generated by the collapsing clay structure at a rate equivalent to the rate of pore pressure dissipation by drainage.
Publication date
PublisherNorwegian Geotechnical Inst., Oslo, Publ.
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number17193
NPARC number20374103
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Record identifier6398f0e0-990b-40c7-8f2e-8b8ad32e7d12
Record created2012-07-23
Record modified2016-05-09
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