Ground surface sand 1.7 m silt 2.5 m Problem #4 (22 points) A 2.0 m x 3.0 m rectangular foundation is to be constructed

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Ground Surface Sand 1 7 M Silt 2 5 M Problem 4 22 Points A 2 0 M X 3 0 M Rectangular Foundation Is To Be Constructed 1 (40.93 KiB) Viewed 34 times

Ground surface sand 1.7 m silt 2.5 m Problem #4 (22 points) A 2.0 m x 3.0 m rectangular foundation is to be constructed at 1.0 m below the ground surface at the site shown in the figure. The foundation will support a 7 = 16.8 kN/m column load of 2400 kN. 7.-17.5 kN/m 1. Calculate the initial effective stress in the middle of the clay layer. 2. Calculate the average stress increase in the clay 7.-17.2 kN/m layer below the center of the foundation using "lel 7.-17.8 kN/m Average stress increase within a given soil layer Clay (between 2 = H and H) below a corner" method. 7-16,4 kN/m 3. Sketch the e-log(o') curve and mark the initial and L. 43 and PL. 26 y..-17.9 kN/m final states. 4. Calculate the primary consolidation settlement of Soft rock the clay layer that will result from the load carried by the foundation. • Assume that the water table is at the ground surface and the clay layer is normally consolidated. Use C = 0.009 (LL-10) and C = Cc/5 for calculating slopes of virgin compression and recompression lines. Solution: 3.5 m