Influence of destructuration of soft clay on time-dependant settlements

DFT Nash

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

5 Citations (Scopus)

Abstract

The time-dependant settlement of soft soils following application of surface loading may be modelled using elastic visco-plastic constitutive models to describe the soil behaviour. For applied loadings that increase the stresses to around the in-situ yield stress, the predicted behaviour is strongly influenced by the associated breakdown of clay structure and the way in which this is modelled. The paper describes some predictions for a hypothetical case prediction exercise recently organised by the Norwegian Geotechnical Institute (NGI), to compare different calculation methods used in settlement analyses of soft soil around the world. The results presented here were made using a one-dimensional coupled consolidation analysis implemented in the spreadsheet-based software Briscon. Parameters were obtained from an oedometer test and the results were extrapolated over the full soil profile. Various plausible assumptions about the shape of the isotaches around yield were explored, and it is shown that the predicted long-term settlement may vary by factors of two or more depending on the assumptions made.
Original languageEnglish
Title of host publication7th European Conference on Numerical Methods in Geotechnical Engineering. Trondheim, June 2010
EditorsT Benz, S Nordal
PublisherTaylor & Francis Group
Pages75 - 80
Number of pages6
ISBN (Print)9780415592390
Publication statusPublished - 2010

Bibliographical note

Name and Venue of Event: Norwegian University of Science and Technology (NTNU), Trondheim
Conference Proceedings/Title of Journal: Numerical Methods in Geotechnical Engineering
Conference Organiser: International Society for Soil Mechanics ERTC7 (numerical modelling)

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  • Cite this

    Nash, DFT. (2010). Influence of destructuration of soft clay on time-dependant settlements. In T. Benz, & S. Nordal (Eds.), 7th European Conference on Numerical Methods in Geotechnical Engineering. Trondheim, June 2010 (pp. 75 - 80). Taylor & Francis Group.