A consolidated-drained triaxial test is carried out on a sand specimen that is subjected to 100KN/m² confining pressure. The vertical deviator stress was increased slowly such that there is no build-up of pore water pressure within the specimen. The specimen failed when the additional axial stress Ao reached 260KN/m² a. Find the friction angle of the sand. b. Another identical sand specimen is subjected to 200KN/m² confining pressure. What would be the deviator stress at failure?

Principles of Foundation Engineering (MindTap Course List)
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Chapter2: Geotechnical Properties Of Soil
Section: Chapter Questions
Problem 2.18P
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A consolidated-drained triaxial test is carried out on a sand
specimen that is subjected to 100 kN/m2 confining pressure.
The vertical deviator stress was increased slowly such that
there is no build-up of pore water pressure within the specimen.
The specimen failed when the additional axial stress
 reached 260 kN/m2.
a. Find the friction angle of the sand.
b. Another identical sand specimen is subjected to
200 kN/m2 confining pressure. What would be the deviator
stress at failure?

A consolidated-drained triaxial test is carried out on a sand specimen that is
subjected to 100KN/m² confining pressure. The vertical deviator stress was
increased slowly such that there is no build-up of pore water pressure within
the specimen. The specimen failed when the additional axial stress Ao
reached 260KN/m²
a. Find the friction angle of the sand.
b. Another identical sand specimen is subjected to 200KN/m² confining
pressure. What would be the deviator stress at failure?
Transcribed Image Text:A consolidated-drained triaxial test is carried out on a sand specimen that is subjected to 100KN/m² confining pressure. The vertical deviator stress was increased slowly such that there is no build-up of pore water pressure within the specimen. The specimen failed when the additional axial stress Ao reached 260KN/m² a. Find the friction angle of the sand. b. Another identical sand specimen is subjected to 200KN/m² confining pressure. What would be the deviator stress at failure?
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