Fig. 18
From: Influence of P-wave oblique incidence on seismic response of helical piles in soft soil sites

Effect of different numbers of helical blades on dynamic p-y curve of helical pile.
From: Influence of P-wave oblique incidence on seismic response of helical piles in soft soil sites

Effect of different numbers of helical blades on dynamic p-y curve of helical pile.