Seawall Reinforcement Work in Kanzakigawa River

Since the river mouth of western area in Osaka City has a wide area of land of sea level, in the event of an earthquake, liquefaction might occur and causing the flood protection levees to sink. This also potentially leading to flooding of residential areas and factories behind them due to tides and tsunamis that may occur after the earthquake.

Therfore, aseismic countermeasure targeting Nankai Trough megathrust earthquake are urgently needed for the flood protection levees along the Kanzakigawa River.

As a countermeasure, jet grouting was selected as the ground improvement method, and our JETCRETE method was used. This construction area located nearby railway stations and densely populated residential buildings. 

It was determined that utilizing public roads will effect the local residents' traffic, so instead of installing a land-based plant, the plant was installed on the balge. Furthermore, the spoil was transfered using a soil transport vessel.

(Location: Osaka)