Question

use letter b

Steady state seepage is established under the sheet pile shown in Figure P4. Compute the safety factor against quick conditions in the hatched area. Silty Sand Y=120 lb/ft? Y = 100 lb/ft? k=0.001 in/s Sound Bedrock Figure P4: Cross-section for problem 4 First letter of your FIRST name A.C DF G-I J-M N-P Q-S T-Z 20 FINAL ANSWER

Answer 1

hoft Total head loss - 40 ft No. of drops - 9 head loss in Idrop= 40 = 4.nuft head at A (by flow not] = 3 drop- = 3x4.44 =13.33 tt head at B 2.5 X 4.44 llallat

so, exit gradient = h 12 h (13.33 + 11011)/2 25 -0.488 Critical enit gradient: Buy - 120.62.4 0.923 Fos: 0.923 = 1.89 0.488