Question

mblem No. 3 ( 30%) A steel eil tank with flexible foundation, 50m diameter and 12m height has oil y-9.42 kN The foundation soil is 3.3m of sand Ф.35° and Y-18.85 kNm' overlaying a layer of uniform. armally consolidated clay of 17tn thick with Ф-10° and Y-17.3 kN/m.c_ 12 kNtn.c -127 and C-04 underlain by another layer of sand. The water table is at the surface level. Oedometer test on a 2.54cm thick, doubly-drained sample from the clay stratum attained S0 consolidation in 6.5 min. Find a- The total differential settlement of the fully loaded tank (difference between center and edge) Ap (center, mid depth)0.91 Ap(surface Ap (odge, mid depth) 0.43 Ap(surface) b-The time required for 75% consolidation in the field The depth of excavation for minimal settlement Hint TS-0.197 and T 0.48

Answer 1

ctiue.

11 3.04 kym2 12 x 9.42 = 10 2·84〉二0.9651m teo 13 417

93.49 21 AH (eag) . 5446 (b a (65min) o 25 2. 15 mimimal sellemant Depth 여 excavation

Lc-) Depth excavat setQsment (h) AP (but- it should mor be zero) HemL > on Re tankcoiec