Method and system for installing cast-in-place concrete piles with a sonic drill and a removable or retrievable drill bit

A method for forming a cased hole and installing a cast-in-place concrete pile, the method comprising:

• positioning a sonic drilling apparatus at a desired location, the sonic drilling apparatus including a rotating and vibrating apparatus for rotating and vibrating a drill string into the ground, a retrievable drill bit being operatively connected to the drill string;
• drilling the cased hole to a desired depth by rotating and vibrating the drill string into the ground;
• retrieving the retrievable drill bit from the cased hole following the drilling of the cased hole to a desired depth;
• discharging concrete into the cased hole following the retrieval of the retrievable drill bit;
• and
• removing the drill string from the ground.

A method for drilling a cased hole into the ground and installing a cast-in-place concrete pile, the method comprising:

• positioning a sonic drilling apparatus at a desired location, the sonic drilling apparatus including a drill string and a retrievable drill bit being operatively connected to the drill string;
• simultaneously rotating and vibrating the drill string into the ground to form a cased hole;
• drilling the cased hole to a desired depth;
• retrieving the retrievable drill bit from the cased hole following the drilling of the cased hole to a desired depth;
• discharging concrete into the cased hole following the retrieval of the retrievable drill bit;
• and
• removing the drill string from the ground.

A method for forming a cased hole and installing a cast-in-place concrete pile, the method comprising:

• positioning a sonic drilling apparatus at a desired location, the sonic drilling apparatus including a rotating and vibrating apparatus for rotating and vibrating a drill string into the ground, a removable drill bit being operatively connected to the drill string;
• drilling the cased hole to a desired depth by rotating and vibrating the drill string into the ground;
• removing the removable drill bit from the drill string following the drilling of the cased hole to a desired depth;
• discharging concrete into the cased hole following the removal of the removable drill bit;
• and
• removing the drill string from the ground.