2022 Volume 78 Issue 2 Pages I_655-I_660
In recent years, levee-breach due to overflow have occurred frequency. As a countermeasure, overflow-resistant levee are required. It is important to ensure the stability of the back slope protection works against overflow, which is one of the levee reinforcement against overflow. However, the hydrodynamic forces characteristics acting on the protection works in the overflow condition have not clarified. In this study, model experiment were conducted to investigate the relationship between the shape of the protection works and the hydrodynamic forces in the overflow condition, and the vibration characteristics of the hydrodunamic forces in relation to the unevenness.The results show that the flat blocks, the hydrodynamic forces increases significantle due to the unevenness. The large roughness of the protection works does not increase the hydrodynamic forces due to unevenness. However, eve if the absence if landsides, the hydrodynamic forces were found to vibrate signigificantly. In the future, it will be necessary to consider the introduction of an appropriate safety factor for stability evaluation and maintenance to achieve the specified performance.
PROCEEDINGS OF HYDRAULIC ENGINEERING
