SYMPOSIA PAPER Published: 01 January 1957
STP45009S

The Use of a Field Vane Apparatus in Sensitive Clay

Source

The extremely sensitive deposits of post-glacial marine clay in the St. Lawrence lowlands have presented major difficulties in obtaining adequate undisturbed samples for a reliable determination of shear strength. To overcome this problem, a simple field vane apparatus was devised which was readily adaptable to existing drilling equipment. This paper describes the apparatus and outlines the method of testing that has been used in the field. Shear strength values obtained are compared with those obtained from tube samples from several test holes of Leda clay. The influence of such factors as the area ratio of the vane and rod friction are discussed along with its use as a measure of sensitivity. It is concluded that the field vane device offers a more reliable criterion for shear strength of the clay than determinations made from tube samples. Advantages and restrictions on its use are also considered.

Author Information

Eden, W., J.
Division of Building Research, National Research Council of Canada, Ottawa, Canada
Hamilton, J., J.
Division of Building Research, National Research Council of Canada, Ottawa, Canada
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Details
Developed by Committee: D18
Pages: 41–53
DOI: 10.1520/STP45009S
ISBN-EB: 978-0-8031-5939-6
ISBN-13: 978-0-8031-6093-4