ABSTRACT
A river improvement project has been conducted at the left bank of the Kinugawa River in Chikusei City. The project consisted of the works of levee heightening, construction and renovation of the riverbank and the sluiceway. The repair work of the Ezure water discharge channel was performed using a steel tubular pile wall as a main structure of the retaining wall of the sluiceway. Twenty-five tubular piles were installed at the point where the discharged water flows into the Kinugawa River. The wall was constructed in a hat-shape layout to protect both banks of the mainstream and the sluiceway. The Gyro Piler was set at the pile top level, 3.0m higher than the current bank crest, using a reaction base and reaction sheet piles (type 4). In a construction period of one-month, the tubular pile wall had been constructed steadily. Details of the piling work are reported in this paper.
