Patent ID: 7390144

Claim:
A method of installing a concrete pile reinforced with an internal steel pipe comprising the steps of: a) locating a pre-stressed concrete pile on bedrock that is pre-cast with the steel pipe positioned axially within said concrete pile, the lower end of said steel pipe extending below the concrete pile and having a plurality of orifices therein; b) drilling a first hole from within the steel pipe into the bedrock to a depth to accept the lower end of the pipe and to a diameter greater than the outer circumference of the steel pipe; c) drilling a second hole from within the steel pipe into the bedrock so that it is concentric with and below said first hole to form an anchoring socket, said second hole having a smaller diameter than the diameter of said first hole; d) placing an anchor through the steel pipe and into the anchoring socket for anchoring said anchor to bedrock; and e) injecting a grout under pressure into said steel pile and anchoring socket until the grout fills the steel pipe and said second hole and seeps through the orifices in the lower end of said steel pipe and fills an annular space between the outer circumference of said steel pipe and the bedrock walls of the first hole.