O-Pile

EMERGENCY USE

Distaster Relief at Fukashima

Repair work of a submerged weir at the downstream side of a dam

diameter:φ457.2mm  t12.0mm
pile length:15.0m
pile depth:5.3m
number:55

O-Pile was used instead of the z or u sheet pile due to a collapsed part of submerged weir at the downstream side of the dam body in the repair work after the heavy rain in Fukushima because cost and time reduction is needed for the expansion tendency owing to the hardness of bedrock and necessity of the two-steps process (sand replacement with hard (UCS = 50 N/mm2) rock excavation and installation) and excessive expansion of steel stage.

Fukashima.jpg