Publication Abstract

Proceedings-DFI/EFFC 11th International Conference on Piling and Deep Foundations, 2014, Stockholm, Sweden, (DFI)

Full-Scale Field Investigations & Numerical Analyses of Innovative Seismic Composite Fiber Reinforced Polymer and Reinforced Grouted Helical Screw Instrumented Piles Under Axial & Lateral Monotonic & Cyclic Loadings
Yasser Abdelghany, Ministry of Transportation & Infrastructure Headquarters, Canada; M. Hesham El Naggar, The University of Western Ontario, Canada

The axial and lateral monotonic and cyclic behavior of helical pile foundations was investigated and new innovative helical screw systems suitable for seismic loadings were developed and patented. More than one hundred full scale field load tests were conducted on instrumented helical screw piles installed in cohesive soil. The piles included: plain helical screw piles (P-HSP); grouted (G-HSPs); fiber reinforced polymer FRP-G-HSPs; and reinforced grouted RG-HSPs. The RG-HSP piles axial capacity was more than twice that for P-HSP, with minimal reduction after cyclic loading, and their lateral capacity was more than 3 times the P-HSPs capacity. A 3-D finite element model was established. The results of 3-D finite element modeling were used to establish the load transfer mechanism and a design methodology for the considered piles.

 article #1915; publication #100 (IC-2014)