丹江口工程下游岩性与冲坑变化的探讨

通过丹江口枢纽泄洪深孔下游基岩多年冲刷坑实例 ,以及大量的原型观测 ,收集了冲刷的形成、发展等有关资料 ,与水工模型冲刷试验成果得到相互验证。同时结合河床地质条件、基岩节理块形状、岩石的性质、断层的破碎带、裂隙发育、缓倾角等因素与冲刷坑形成过程进行综合分析 ,对挑流下游基岩冲刷模拟方法进行了讨论 ,为今后挑流下游基岩冲刷预报提供了参考。

The Problem of the River Rock Bed Scoured in the Downstream of the Dan Jiang Kou Project

Many related data have been collected about the formation and development of the pit in rock bed scoured through years by the flows discharged from deep orifice of DJK Dam. A lot of prototype observations have been verified experimentaly by the resalts obtained in hydranlic models. Comprehensive analysis of the formation process of the scoured pit must take into consideration many factors such as the geologic condition of the river\|bed, the shape of flow jetting, the characteristics of the rock, the geological faults and development of cracks. A comparison between the prototype observation and model test results are attached in.