Two vanes A and B, with length-to-diameter ratios of 3 and 1 respectively, are each used to make a test at the depth in a clay layer. Both vanes have a diameter of 50 mm and the torque values measured were 95 N-m for A and 45 N-m for B. Find the values of undrained shear strength on the horizontal and vertical planes at this depth. Explain why undrained strength in clays may vary with direction.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Two vanes A and B, with length-to-diameter ratios of 3 and 1 respectively, are each used to make a test at the depth in a clay layer. Both vanes have a diameter of 50 mm and the torque values measured were 95 N-m for A and 45 N-m for B. Find the values of undrained shear strength on the horizontal and vertical planes at this depth. Explain why undrained strength in clays may vary with direction.
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