Rig will be centered on pile point. Drilling will be carried out using auger/bucket to a depth of approx. 2 to 3 meters. Then a temporary MS casing for about 4 to 6 m (approx) length from the ground level will be driven to protect loose soil from falling in the bore hole at locations where the soil is in loose state and there is a tendency of collapse of bore hole. After driving the casing its verticality will be checked by plumb bob. Boring of Piles: The excavation is generally performed by rotation using a rotary drill, composed of a rotary table.

During the entire operation, the pile bore will be kept stable with bentonite solution.

The bentonite sample from the bottom of borehole will be collected and its density will be measured by Hydrometer having a range of 1.001 to 1.300 gm/ml. Determination of Marsh Cone Viscosity: The viscosity will be determined by using cone apparatus.

Pile reinforcement cage shall be fabricated as per the details given in drawing and Bar Bending Schedule.