Lift the bottom piece of steel reinforcement cage and put it in the hole by crane, fixed the head of the bottom cage above the ground by steel pipe; lift the second piece of the steel reinforcement cage by the crane, joint the steel bars one by one. After the joints are finished, put the second piece of the steel reinforcement cage in the hole slowly. Repeat the manipulation until designed length of the cage is satisfied. The top of the steel reinforcement cage will fix to the hard ground to guarantee the top elevation of the cage is at the designed Elevation.