The figure below shows a proposed foundation site with 10ft of sand overlying 15ft of clay with consolidation properties as indicated. The clay is normally consolidates. Assume 1-D conditions. a) Computer the initial o'v at the middle of the clay layer prior to excavation and construction. b) After excavation and during construction, the foundation area will be heavily loaded with the structure and equipment so that o'v at the middle of the clay layer will be increased to 3900 psf. Determine the settlement under these conditions. c) After construction is completed, the equipment will be removed and the final o'v at the middle of the clay layer will be 3200 psf. How much does it heave and what was the net settlement? 10' 15' DI Sand Foundation stress yd = 110 pcf Clay Yt = 120 pcf Cr = 0.033 Cc = 0.165