摘要
本文介绍了作者采用能量计算法,放大岩块模拟试验法,以及量测冲坑底部脉动压强来估测冲坑稳定等三种方法,通过综合论证,求得了三峡大坝下游岩基冲刷极限深度值。结果表明:前两种方法所得各典型水位下的冲深值能相互验证,第三种方法能佐证第二种方法,因而说明所得的极限冲深值有较高的可信度。此外,本文在岩基冲刷问题研究方法上也具有较高的学术价值。
Three methods have been used in the synthetical study, i. e. (1)the energy approach, (2)the physical model study by using enlarged rocks, (3)estimate the stability of the scour pool by using the fluctuating hydro-dynamic pressure measured at the bottom of the pool, so that the equilibrium scour depth of the bedrock downstream of the dam were predicted. The results indicate that for the typical water levels the scour depths obtained by the first and the second methods are nearly the same, and the experimental results obtained by the second method are confirmed by the third one. Thus, the predicted e-quilibrlum scour depths are rather creditable. The study has presented valuable results in terms of the research methods of rockbed scour.
出处
《长江科学院院报》
CSCD
北大核心
1991年第2期10-21,共12页
Journal of Changjiang River Scientific Research Institute
关键词
溢流坝
岩体
基础
挑流
冲刷
equilibrium scour depth
energy approach
physical model study by enlarged rocks
fluctuating hydrodynamic pressure
