Study on hydraulic characteristics of sabo dam with a flap structure for debris flow |
| |
| Authors: | Yeonjoong Kim Hajime Nakagawa Kenji Kawaike Hao Zhang |
| |
| Institution: | 1. Department of Civil and Earth Resources Engineering, Disaster Prevention Research Institute, Kyoto University, Japan;2. Department of Civil and Earth Resources Engineering, Disaster Prevention Research Institute, Kyoto University, Japan;Department of Civil and Earth Resources Engineering Director of Ujigawa Hydraulics Laboratory, Japan |
| |
| Abstract: | The front part of the flow is very important and complex in the case of debris flow where there is an accumulation of large boulders. It is important to control or dampen the energy of the frontal part of a debris flow for the safety of the downstream area because the impact pressure of debris flow is much greater than that of clear fluid. The main objective of this study is to analyze the hydraulic characteristics of the proposed dam (i.e. closed-type dam with flap). The vertical pressure distribution of this type is compared with conventional dam types. In the experiments, the total pressure associated with major debris flows was recorded in real time by a system consisting of four dynamic pressure sensors installed on different types of dam. The results from experimental data clearly show that the dam with the flap has advantages of capturing the debris flow with large boulders and controls the total pressure by flow circulation due to presence of the flap structure compared to a closed-type dam without flap. Further-more, the empirical coefficients of hydrodynamic and solid collision models were proposed and com-pared with available coefficients. |
| |
| Keywords: | Debris flow Flap structure Empirical coefficient Total pressure |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
