Variability of strength and deformation properties in lime-cement columns evaluated from CPT and KPS measurements
2013 (English)In: Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards, ISSN 1749-9518, Vol. 7, no 1, 21-36 p.Article in journal (Refereed) Published
The strength variability of soil improved by deep mixing with lime-cement columns is generally high. Eurocode 7 states that selection of characteristic values for geotechnical parameters shall take the variability of measured property values into account. This variability can be considered in the design by using reliability-based design. With reliability-based design, three statistical parameters are needed to evaluate the design value; mean, variance and scale of fluctuation. In this paper, the shear strength of soil improved by lime-cement columns was evaluated using two different penetration methods, the cone penetration test and the column penetration test. The strength was quantified statistically by the mean, variance and scale of fluctuation, while each test method was analyzed and discussed with a focus on its influence on the design value. Based on the analyses, the column penetration test is suggested as a test method for soil improved by lime-cement columns.
Place, publisher, year, edition, pages
2013. Vol. 7, no 1, 21-36 p.
ground improvement, deep mixing, lime-cement columns, CPT, column penetration test
Civil Engineering Geotechnical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-59088DOI: 10.1080/17499518.2013.763571ScopusID: 2-s2.0-84874191684OAI: oai:DiVA.org:kth-59088DiVA: diva2:475014
QC 20140618. Tidigare titel: "Strength variability in lime-cement columns evaluated using CPT and KPS"2012-01-102012-01-102015-06-05Bibliographically approved