In the No.317 piled wharf engineering of Dadong port area in Dandong Port,to increase the penetration depth of the steel pipe pile in the pebble bed and satisfy the embedment requirement of the pile foundation,we adopt the open pile tip with outer hoop to reduce the side friction resistance of the pebble bed in the course of pile sinking to increase the penetration depth by more than 2 meters,and the side friction resistance gradually restores 30 days after the pile sinking construction,satisfying the requirement on the bearing capacity of the pile foundation.The results show that the increase of the pile tip with outer hoop can effectively reduce the lateral friction resistance of pebbles in the construction process,increase the pile’s penetration depth,and meet the requirement on the embedded length.