Calculation and Analysis Problems 1. Two undisturbed clay samples were taken from the middle of the overconsolidated and

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Calculation And Analysis Problems 1 Two Undisturbed Clay Samples Were Taken From The Middle Of The Overconsolidated And 1 (97.88 KiB) Viewed 35 times

Calculation and Analysis Problems 1. Two undisturbed clay samples were taken from the middle of the overconsolidated and normally consolidated clay layers in the soil profile shown. The water table is at the top of the overconsolidated clay layer. Consolidation tests were carried out on the two samples and the results are summarized. Table 1 1.0m Sand Layer OC clay NC clay 2.0m OC clay Natural water content (%) 20.0 29.0 Preconsolidation pressure (kPa) 50.0 65.0 Sand 1.5m Compression index 0.55 0.60 Recompression index 0.06 0.07 Coefficient of consolidation (m²/year) 13.0 2.50 3.0m NC clay Impervious stiff stratum Figure 1 Assume that the bulk and saturated unit weights of the sand are 16.0 and 19.0 kN/m³ respectively. Specific gravity of the clay soil g rains is 2.70. A 2 m-high compacted fill with a unit weight of 20 kN/m³ is placed at the ground level. a. What would be the final consolidation settlement? (10%) b. What would be the consolidation settlement after one month? (10%) c. What would be the pore water pressures and effective stresses at the middle of the layers after one month? (10%)