Question

For cohesion-less soil, the angle of internal friction is 45°, find the K0.

(a) 0.429

(b) 0.784

(c) 0.293

(d) 0.334

This question was posed to me by my school teacher while I was bunking the class.

This is a very interesting question from Earth Pressure at Rest topic in portion Failure Envelopes & Earth Pressure of Geotechnical Engineering II

Answer 1

Right option is (c) 0.293

For explanation: Given,

φ=450

K0=1-sinφ=1-sin45=0.293.