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Problem 4 - Consolidation Settlement (30 pts) - A highway embankment 10 m high has been constructed on a clay layer 10 m thick. The embankment fill was compacted at 13% water content to a dry unit weight of 17.7 kN/m2. The clay layer is overlain by 0.5 m of clean sand, and underlain by competent nearly impermeable bedrock. The ground water table is at the surface of the clay. The sand has a dry unit weight of 14.1 kN/m2 and a water content of 6%. The clay has a total unit weight of 21.3 kN/m. Data from a consolidation test on the clay are summarized in Table 1. The coefficient of consolidation was determined to be 8.3 mély, on average. Graph the e-logo' relationship for the soil and determine the overconsolidation ratio. Compute the total settlement. How long is required for the embankment to settle 0.15 m? Table 1. Data from Consolidation Test. Effective Stress (kPa) Void Ratio e 23.8 0.546 47.8 0.541 65.0 0.540 127 0.534 352 0.504 700 0.471 1515 0.433 3056 0.402