ABSTRACT
This construction project was aimed at reinforcing the seismic resistance of an existing river dike. Among the 42 steel tubular piles installed, 11 were installed by press-in piling with a GRB System, and 31 were installed by a normal press-in piling. There were existing H-shaped piles in the northern end river section (Benten Bridge) where four new piles were to be installed, and these H-shaped piles were planned to be removed beforehand. An attempt to pull out and remove the existing piles using a vibratory hammer failed, as the piles broke at a depth of about 3m from the riverbed. Therefore, steel tubular piles were installed at deviated locations by rotary-pressing with a Reaction Stand in proximity to the existing H-shaped piles.
