Helical Micropiles

CHANCE® Helical Pulldown® Micropiles®

This patented innovative application of the helical pile integrates portland-cement-based grout to increase the section properties of the shaft. The Helical Pulldown Micropile (HPM) brings the advantages of the pre-engineered helical pile to higher load applications, providing compression loads up to 400,000 lbs. per pile. By pulling down a special flowable grout as the foundation is screwed into the soil, these micropiles create a deep foundation with both a friction-bearing central shaft and end-bearing helical plates in competent substrata.

Advantages of Helical Micropiles

  • High load capacities for compression, tension and lateral loads
  • Small displacement at load
  • Easy to use in limited access areas, areas with high water tables, and weak surface soils
  • No excavation, vibrations, or spoils (New construction application)
  • Quick installation when compared to traditional deep foundation (New construction application)
  • Similar installation methods for all ground conditions
  • Simultaneous drill and grout Installation
  • Increased corrosion protection

Case Studies: