ISSN: 0149-6115
Page Count: 5

Measurement of B-Values Less Than Unity for Thinly Interbedded Varved Clay

Eigenbrod, KD
Associate professor,Lakehead University,

Burak, JP
Geotechnical engineer,Trow Ontario Ltd.,

Abstract

During testing of thinly interbedded varved clay from Thunder Bay, Northwest Ontario, in CIŪ-triaxial tests it was found that B-tests carried out following completion of the consolidation stages and prior to shearing never resulted in B-values close to unity. However, B-values close to 1 were obtained when B-tests were performed after failure. It was further detected from additional B-tests that B-values decreased with increasing stress levels. The test results will be presented and discussed with respect to the structure of the varved clay, which is characterized by thinly interbedded soft clay seams and stiff sandy silt seams.

Keywords:
varved clays, B-testing, pore pressures, internal shearing, degree of saturation

Paper ID: GTJ10180J
DOI: 10.1520/GTJ10180J
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