1)The stress on the circular footing of 6 m diameter due tocolumn load is 200 kPa at the level of the footing i.e., z = 0 m.Calculate the vertical stress at a depth of 2 m, 4 m and 6 m belowthe central line of the footing and at edge of the footing. Also,draw the pressure bulb for 10% intensity of the applied inconventional graph sheet .
2)There are two borrowing areas ‘A’ and ‘B’ which have soilswith void ratios of 0.8 and 0.7 respectively. The inplace watercontent is 20% and 15% respectively. The fill at the end of theconstruction will have a total volume of 10,000 m3, bulk density of2000 kg/m3 and a placement water content of 22%. Determine thevolume of soil required to be excavated from both areas. Assumethat the specific gravity of the soils at site ‘A’ and site ‘B’ is2.65 If the cost of excavation of soil and its transportation fromthe borrow area to the construction site is Rs 200 per every 100 m3of soil for Area A and Rs 220 per every 100 m3 of soil for area B,which of the borrow area is more economical and justify your answerwith detailed calculations
