Question

Problem 7: (30 points) A square foundation, 2.5 x 2.5 m in size, supports a column load of 478 kN. The soil characteristics are given in the figure below. A. Estimate the average stress increase in the clay layer due to the applied load. B. Estimate the primary consolidation settlement 478 KN 1.5 m 2.5 m2.5 m 16 km GWT 1.75m 1 IRSIN. W 1996 G-2.71 2-37 - 65 km C-15 C -0.240 7- 20 ANS Sund Clay ty @ 1 900 F3 F4 F5 F6 F7 F8 F9 FVC

Answer 1

increase in stress conside- Gereen :- or allesage Let the spese distibution below footing as in the ratio 1v: 0.5H IV: NH) a ring it at middle clay layer IV in H in -thie n>0.5 care. 3.5m centre of * 1.75m € 1.75mm clay layer in stress Increase @ ar 6+292)(L+202)

le=0.515 Cro Сс го 2 0.243 5 Cra0.0486 5 : Settlement Alfa Ho Go log ( be t Hole log (Totoo lte 6. Ite oc 3.5*0.0486 loc 1486 log (39.105 +3.5x0.243 log 59.105+1328 to. 515 65 ito.515 AM= 2 30.87 mm is the settlement of clay layer,