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Experimental Study on Influential Factors of Abrasion Capacity of Debris Flow
会议论文信息
| 期刊名称： | Experimental Study on Influential Factors of Abrasion Capacity of Debris Flow |
| 责任者： | 杨东旭 |
| 关键词： | Debris flow; Drainage channel; Scour; Abrasion; High gradient gully. |
| 会议名称： | 5th International Debris Flow Workshop & Symposium on Silk Roads Disaster Mitigation |
| 届次： | 5th |
| 会议地点： | 北京，新疆大厦 |
| 召开时间： | 2018-11 |
| 论文集名称： | 5th International Debris Flow Workshop & Symposium on Silk Roads Disaster Mitigation Abstracts |
| ISBN： | 无 |
| 项目资助信息： | 藏东南重要城镇和交通干线地质灾害调查 |
| 摘要： | Debris flow drainage channels often witness structure failures caused by scouring abrasion. For high gradient drainage channels, the operating life could be shortened significantly. Factors influencing abrasion capacity of debris flow are not yet clear. Here, site investigation and case analysis of drainage channels in service was summarized. Then, experiments on abrasion capacity of debris flow with different flow velocity, bulk density, scouring duration, grain composition and depth were taken out. And wear performance of concrete blocks was also measured to estimate each variable trend in a rotating bucket. The variables were integrated to Froude number, volume concentration, abrasion time coefficient, and particle non-uniform coefficient using dimensionless method. Least square method was used to determine the index value of four dimensionless variables. It is shown that flow velocity, bulk density and duration scour are power function relationship with abrasion quantity, and the influence of fluid depth and particle non-uniform coefficient is less. However, large particles in the flow put up a significant effect on abrasion quantity. Taking field investigation data from two typical drainage channels as cases to verification, the experimental parameters are anastomotic |
| 浏览量： | 52 |
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