Fluctuating uplift acting on rock blocks at the bottom of river bed and estimation of the limiting scour depth

L. PEIQING; L. AIHUA

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Fluctuating uplift acting on rock blocks at the bottom of river bed and estimation of the limiting scour depth

机译：Fluctuating uplift acting on rock blocks at the bottom of river bed and estimation of the limiting scour depth

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摘要

The hydrodynamic pressures and its propagation within rock cracks must be taken into account to study the development of scour pool due to jet impact downstream of high dams. In this paper, the transmission mechanism of fluctuating pressure in cracks of bedrocks is investigated by using the model of transient flow. A formula for calculating the maximum fluctuating uplift is deduced. The result is verified by the model test. Based on the analysis of forces acting on a rock block, a formula for estimating the limiting scour depth is established. And the formula is applied to the scour depth prediction at the well-known Three-Gorges Dam.

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来源
《Journal of hydraulic research》 |2007年第4期|478-485|共8页
作者
L. PEIQING; L. AIHUA;
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作者单位

Beijing University of Aeronautics and Astronautics, The Key Laboratory of Fluid Mechanics of Ministry,Beijing 100083, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类流体力学;
关键词
rock block; maximum fluctuating uplift; limiting scour depth;

Fluctuating uplift acting on rock blocks at the bottom of river bed and estimation of the limiting scour depth

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