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Effect of Uncertainties of Improved Soil Shear Strength on the Reliability of Embankments
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0001-9615-4861
2013 (English)In: Journal of Geotechnical and Geoenvironmental Engineering, ISSN 1090-0241, E-ISSN 1943-5606, Vol. 139, no 4, 619-632 p.Article in journal (Refereed) Published
Abstract [en]

The strength variability of soils improved by lime-cement columns is very high, and assessment of the reliability is associated with high uncertainty. Previous research on natural soils has shown that variability has a major impact on the reliability of geotechnical systems. However, concerning ground improvement with lime-cement columns, the effect of the uncertainties associated with improved strength properties on the reliability is unknown. This paper addresses the integration of reliability-based design in the design of embankments founded on soil improved by lime-cement columns by an analysis of a project conducted in Sweden. The uncertainties associated with estimating the strength property based on results from cone penetration tests and their effect on the assessed system reliability are addressed and discussed. The use of variance reduction with respect to the spatial variability of the shear strength of the columns was found to have a major influence on the assessed system reliability. Furthermore, it was found that the transformation uncertainty from measurements based on cone penetration tests has a significant impact on the assessed system reliability. System reliability cannot be improved significantly simply by performing a large number of tests.

Place, publisher, year, edition, pages
2013. Vol. 139, no 4, 619-632 p.
Keyword [en]
Ground improvement, Strength, System reliability, Limit state, Embankment
National Category
Civil Engineering Geotechnical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-75013DOI: 10.1061/(ASCE)GT.1943-5606.0000798ISI: 000317062600010Scopus ID: 2-s2.0-84879578799OAI: oai:DiVA.org:kth-75013DiVA: diva2:490307
Note

QC 20130514. Updated from submitted to published.

Available from: 2012-02-04 Created: 2012-02-04 Last updated: 2017-12-08Bibliographically approved

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Larsson, Stefan

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