Computer · Soil Mechanics

Which of the following statements explain why settlements continue to occur at an appreciable rate after many years for a building founded above thick clay strata? i. Low permeability of clay and consequent long time required for the escape of pore water. ii. Plastic action in adsorbed water near grain-to-grain contacts, which delays the transmission of applied stress to the soil grains. iii. Effective stress in the soil at any point is decreased by an amount equal to the seepage force for the downward flow.