Grouted helical pile
AssigneeMagnum Piering, Inc.
InventorsHoward A. Perko, Bernard Brian Dwyer, Matthew Houliston
Life of this patent
Estimating the term…
Abstract
Provided is a helical pile having an elongated shaft, at least one helical blade on the shaft having a leading edge and a trailing edge, and a displacement paddle extending outward from the shaft longitudinally positioned between the leading and trailing edges of the blade to push away soil to create a grout channel surrounding the shaft. At least one grout propeller may be provided on the shaft, having at least one blade pitched an opposite direction from the helical blade to propel grout downward in the grout channel as the pile rotates.
Claims19
A helical pile, comprising:
- an elongated shaft;
- at least one helical blade having a leading edge and a trailing edge on the shaft;
- a displacement paddle extending outward from the shaft longitudinally positioned to extend from the leading edge to the trailing edge of the at least one helical blade to push away soil to create a grout channel surrounding the shaft;
- and
- at least one grout propeller on the shaft, the at least one grout propeller having at least one grout propeller blade pitched in an opposite direction from the helical blade to propel grout downward in the grout channel as the pile rotates.
A method of installing a grouted helical pile, comprising:
- providing a helical pile having an elongated shaft, at least one helical blade on the shaft having a leading edge and a trailing edge, and a displacement paddle extending outward from the shaft, the paddle being longitudinally positioned to extend from the leading edge to the trailing edge of the at least one helical blade to push away soil to create a grout channel surrounding the shaft;
- providing the shaft with at least one grout propeller, the at least one grout propeller having at least one blade pitched in an opposite direction from the helical blade to propel grout downward in the grout channel as the pile rotates;
- rotating the pile to drive the pile into soil;
- providing a grout reservoir at the soil surface where the pile is being installed;
- and
- adding fluid grout to the reservoir to flow into the grout channel.
A method of installing a grouted helical pile, comprising:
- providing a helical pile having an elongated hollow shaft with grout ports, at least one helical blade on the shaft having a leading edge and a trailing edge, and a displacement paddle extending outward from the shaft, the paddle being longitudinally positioned to extend from the leading edge to the trailing edge of the at least one helical blade to push away soil to create a grout channel surrounding the shaft;
- providing the shaft with at least one grout propeller, the at least one grout propeller having at least one blade pitched in an opposite direction from the helical blade;
- rotating the pile to drive the pile into soil;
- and
- simultaneously pumping grout down the shaft under pressure and out the grout ports as the pile is rotated into the soil, the grout propeller propelling grout downward in the grout channel as the pile rotates.
Dependencies are inferred from the claim text.