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7. A normally consolidated clay layer has LL-40. A new structure was built, introducing loads that cause the effective stress to double. How much will the void ratio of the clay change as a result? Will this be an increase or decrease in void ratio? 8. A direct shear test was conducted and the results are summarized in the graph below. What is the approximate angle of friction, cohesion, and shear strength? (8 pts) (psf) 3168- 1920 296- N (psf) 1000 2000 4000 9. A 12-ft high retaining wall has backfill of granular soil with an internal angle of friction of 30 and unit weight of 125 pef. What is the Rankine passive earth pressure on the wall? (10 pts.)
engineering   Civil-Engineering   
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CanJolidaed 0.009(LL-10 Given LL = 45 o.o8U These a 14 2o- 126 6 24 an

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