Question
Geotechnical Engineering Question on Earth pressure theories
A vertical smooth rigid retaining wall is supporting horizontal ground with dry cohesionless backfill having a friction angle of 30°. The inclinations of failure planes with respect to the major principal plane for Rankine's active and passive earth pressure conditions, respectively, are
A
30° and 30°
B
60° and 60°
C
30° and 60°
D
60° and 30°
Answer
60° and 60°
Explanation
Solution
The correct option is (B): 60° and 60°.