Test: Khosla’s Theory - Civil Engineering (CE) MCQ

khosla’s theory has an account of flow pattern below the impermeable base of hydraulic structures, hence it can be used to calculate the uplift pressure and the gradient at the exit, called the exit gradient.

According to Leliavsky (1965), failure of Norora weir in India was due to excessive water pressure (uplift pressure) causing the floor to be blown upwards.

 In 1902, Col. Clibborn and Beresford developed the hydraulic gradient theory of weir design as a result of their experiment.

If a hydraulic structure is built on pervious soil, the higher water level at the upstream of the structure will cause seepage through the permeable soil.

According to the commonly accepted ideas , the undermining is supposed to result from piping ,that is , the erosion of the sub-soil by the high velocities of flow of water through it when such velocities exceeds certain limit.