The following are the results of four drained direct shear tests on undisturbed normally con having a diameter of 2.0 inches and height of 1.0 inch. a) Draw a graph on excel for shear stress at failure against the normal stress and determi friction from the graph. b) If a drained triaxial test is conducted on the same soil with a chamber confining pressu would be the deviator stress at failure? c) For part b, what is the inclination of the failure plane with the major principal plane? Normal Force Shear Force at Test No. (lbf) Failure (lbf) 1 56.2 31.2 84.3 47.0 101.1 56.2 121.4 67.4 234 4
The following are the results of four drained direct shear tests on undisturbed normally con having a diameter of 2.0 inches and height of 1.0 inch. a) Draw a graph on excel for shear stress at failure against the normal stress and determi friction from the graph. b) If a drained triaxial test is conducted on the same soil with a chamber confining pressu would be the deviator stress at failure? c) For part b, what is the inclination of the failure plane with the major principal plane? Normal Force Shear Force at Test No. (lbf) Failure (lbf) 1 56.2 31.2 84.3 47.0 101.1 56.2 121.4 67.4 234 4
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:2- The following are the results of four drained direct shear tests on undisturbed normally consolidated clay samples
having a diameter of 2.0 inches and height of 1.0 inch.
a) Draw a graph on excel for shear stress at failure against the normal stress and determine the drained angle of
friction from the graph.
b) If a drained triaxial test is conducted on the same soil with a chamber confining pressure of 4,344 lb/ft², what
would be the deviator stress at failure?
c) For part b, what is the inclination of the failure plane with the major principal plane?
Shear Force at
Test No.
Normal Force
(lbf)
Failure (lbf)
1
56.2
31.2
84.3
47.0
101.1
56.2
121.4
67.4
23+
2
4
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