Behaviour of reinforced sand under liquefaction

The proposed investigation deals with the liquefaction study of a fine locally available SOLANI SAND deposited in a test tank 1.05m x 0.6m x 0.6m high and subjected to sinusoidal vibrations. Geogrid, Horizontal filter and Vertical Drains of gravel have been tried to control liquefaction. Geogrid at two different horizontal spacings of 50mm and 100mm, has been tested. Vertical drains of 50mm diameter (d), at three different spacing of 2.5d, 3d and 4d have been employed. The frequency of the vibration, has been fixed at 4 cps,. the acceleration range being from 10%g to 40%g. The relative density (initial) of 20% has been maintained for all the tests. It was observed that Geogrid can control liquefaction. But more effective method, to reduce the liquefaction potential, is by providing Horizontal Filter and Vertical Drains of gravel.