High strain rate characterisation of kaolin and its application to rapid load pile testing

Turlough Quinn, Scott Robinson, Michael Brown

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Strain rate effects have a significant impact on the behaviour of soils, and this has implications throughout geotechnical engineering, no more so than in the testing of deep foundations. In this paper, the results of a study using high speed triaxial testing on kaolin at strain rates from 1 %/hr to 180000 %/hr are
presented, and their implications for rapid load pile testing are set out. It is shown that both the soil strength and stiffness are rate dependent, and that the strength increases generally exceeded those expected. This study demonstrates that the damping co-efficients used in the analysis of rapid load pile tests can be derived from laboratory testing and that the relationship used can accurately model the rate dependent behaviour.
Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Testing and Design Methods for Deep Foundations
Pages311-319
Number of pages9
Publication statusPublished - Sep 2012
Event9th International Conference on Testing and Design Methods for Deep Foundations - Kanazawa, Japan
Duration: 18 Sep 201220 Sep 2012
http://www.abms.com.br/site/links/julho2011/Kanazawa2012.pdf

Conference

Conference9th International Conference on Testing and Design Methods for Deep Foundations
Abbreviated titleIS-Kanazawa 2012
CountryJapan
CityKanazawa
Period18/09/1220/09/12
Internet address

Keywords

  • stain rate
  • rate effects
  • pore pressure generation
  • small strain
  • kaolin
  • pile testing
  • statnamic

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