挑流消能冲坑内基岩体的动力分析研究

宏观上挑流消能中下游河床冲刷坑的形成，主要是入射水流的冲击能力与河床基岩的抗冲能力两者相互作用的结果。入射水流是以低频紊动的脉动水流为主，而河床基岩的抗冲能力，主要由岩体的强度及其振动特性确定。一般情况下，下游河床基岩在水流脉动的作用下，发生低应力断裂，最后出穴而去，形成冲坑。

Research on dynamic characteristics of original rock in the scour pit of energy dissipation of ski-jump

In the macroscopic view, the scouring by jet fluids of energy dissipation of ski-jump on the rocky river beds results from the combined action of the impulsive forces of the incident fluids and the scour resistances of the river bedrocks. As far as the incident fluids are concerned, fluctuation flow of the low frequency is the main parts. But the scour resistances on the rocky river beds is decided by hardness and dynamic characteristics of rock mass. In general, under the action of fluctuating flow, the bedrock at the lower river generates the abruption of low stress, and departs from the rocky river at last. At this time, scour hole is formed.