Publication Abstract




Proceedings of the 28th Annual Conference on Deep Foundations, 2003, Miami Beach, FL "Deep Foundations in Compressible Soil and Soft Rock", (DFI)

Helical Piles with Grouted Shafts A Case History
Shawn Downey, Allen Brown

A helical pile with in-situ grouted shaft was used to underpin the existing slab of a larger retail store in the Edmonton, Alberta Canada area. The existing structural slab did not have the capacity to support the increased load requirements. The design to upgrade the capacity specified a drilled shaft as the deep foundation to underpin a portion of the slab. A helical pile was quoted as an alternate and ultimately won the bid based on the advantages of the system. After an ASTM D1143 Quick Load Test confirmed the axial compression capacity, 723 helical piles with grouted shafts were installed in 3 weeks underpinning 40% of the 93,000 ft (8,660 m) building.


 article #1217; publication #66 (AM-2003)