Question (3) (30 pts) A soil profile beneath a lake consists of 8 m thick sand layer underlain by a 4 m clay layer. The water level is 3 m above the top of the sand. The saturated unit weight of the sand is 20 kN/m³ and that of the clay is 19 kN/m³. The unit weight of water is 9.81 kN/m³. i. (10 pts) Plot the water-soil system and label the soil names and unit weights on the diagram. At the centerline of the clay layer compute the: ii. (10 pts) Total vertical stress. (10 pts) The total Horizontal stress (Assume K. = 0.61)

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