Longitudinal surface profiles of granular debris flows

Chyan-Deng Jan, Hsieh Wen Shen

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

Longitudinal surface profiles of granular material flowing down an inclined plane were studied by means of theoretical analysis and laboratory experiments. There are two driving forces acting on the granular material. One is a gravity force component along the inclined plane and the second is a force induced by lateral pressure gradient. The lateral earth pressure theory used in soil mechanics was expanded for granular debris flow. The total resistant stress acting on granular flows was treated as the linear sum of a rate-independent, contact friction part and a rate-dependent, viscous part. The former was expressed as a Mohr-Coulomb relationship. The latter was expressed as a friction slope relating to flow velocity and flow depth. According to this forgoing assumptions and the balance of longitudinal momentum, a method to calculate the longitudinal surface profiles was developed, by using a moving coordinate. Experiments with 5 mm glass beads were conducted in a conveyor-belt flume. Preliminary results suggest that the slope of the surface profile of granular flow decreases as the flume slope increases, and the slope of the surface profile increases as the belt speed increases. Experimental results were also compared with theoretical results.

原文English
主出版物標題Hydraulics/Hydrology of Arid Lands
編輯Richard H. French
發行者Publ by ASCE
頁面530-536
頁數7
ISBN(列印)0872627713
出版狀態Published - 1990
事件Proceedings of the International Symposium on Hydraulics/Hydrology of Arid Lands and 1990 National Conference on Hydraulic Engineering - San Diego, CA, USA
持續時間: 1990 7月 301990 8月 2

Other

OtherProceedings of the International Symposium on Hydraulics/Hydrology of Arid Lands and 1990 National Conference on Hydraulic Engineering
城市San Diego, CA, USA
期間90-07-3090-08-02

All Science Journal Classification (ASJC) codes

  • 工程 (全部)

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