Question

4) A large slope is constructed as shown in the figure below. A failure surface is considered passing through the crest and the toe of the slope. The soil properties are y= 18 kN/m2, c 0 kPa and =25°. The water table is well below the ground surface Using the theory for the stability of an infinite slope, estimate the factor of safety. [5 а. marks] b. Use Fellenius' method to determine the Factor of Safety against failure. [13 marks] State which of the two factors of safety you have computed is nearest the critical c. factor of safety. [2 marks] y (m) Point x (m) Angle to vertical () R 27.3 m 5.37 26.57 0 -11.33 0=74.8° 2 6.00 -0.53 1.33 (X6,V6) 3 12.00 0.29 14.06 18.00 2.57 4 27.57 24.00 6.82 43.04 63.47 6 30.00 15.00 01 =11.33 15.0 m 6.0 m (x,Ул)-(0,0) 30.0 m

Answer 1

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