Application of Ultra‐high‐strength Fiber‐reinforced Concrete for Irrigation Channel Repair Works

This chapter describes the basic properties of ultra-high-strength fiber-reinforced concrete (UFC), and focuses on the results of abrasion resistance tests and roughness coefficient measurement. It presents the production and construction of UFC panels used in the Hosokawa river tunnel repair work. The use of UFC panels shortened the construction period and reduced the construction cost compared to the conventional method using steel pipes. No special technical skills or qualified personnel were needed. Based on the success of the project, further improvement and streamlining of the tunnel repair method using UFC panels is expected. The method is also expected to be widely used for repairing existing irrigation channels.