Samples of soil have been taken at depths of 1m, 3m and 5m belownatural surface in a swamp area. The soil profile with depth is a uniform clay with asaturated density of 1750 kg/m3. Water level was originally at natural surfacealthough now it has been permanently lowered to 3m below natural surface. Values ofhorizontal total stress have been measured at:
Depth(m) Total Horizontal Stress(KPa)
1 9.8
3 41.2
5 75.5
Estimate the value of the coefficient of at-rest earth pressure forthe deposit. If, when the water table was at the ground surface, the deposit was normallyconsolidated,would it still be normally consolidated with the water tablelowered? A reason must be given for your answer.