The Taitung Branch of the Soil and Water Conservation Bureau considers precast concrete blocks to be the optimal solution for addressing the deleterious effects of torrent management on occupational safety and the environment. This study investigated the effectiveness of the precast concrete block construction process and examined hydraulic experiments on newly patented concrete blocks in the application of groundsills. The results showed that
groundsills encased in reinforced concrete prevented erosion more effectively than did traditional groundsills. Type-C concrete groundsill enclosures cannot be improved to alleviate erosion problems and are more likely to fail than traditional groundsills. Type-X concrete groundsill enclosures were more effective than traditional groundsills in terms of the absolute mean maximum erosion depth and the absolute mean maximum erosion length. Finally, the Type-X and Type-C combination concrete groundsill enclosures are effective for preventing large-scale erosion in high-flow environments.
Key Words: porous precast concrete blocks, torrent management, hydraulic model test