If a soil has effective friction angle of 30°, then the at-rest lateral earth pressure coefficient is
- A0.33
- B0.5Correct
- C1.5
- Dnone of these
Solution
Concept
K₀
Formula
K₀ = 1 − sin φ′
Step-by-step solution
1. K₀ = 1 − sin 30° = 0.5.
Explanation
Jaky's formula.
Why the other options are wrong
0.33 is Ka.
Shortcut
K₀ = 1 − sinφ.
Correct answer: B) 0.5