透水框架群水力特性试验研究

Experimental study on hydraulic characteristics of penetrating frame groups

透水框架群在长江航道整治工程中具有减速、防冲、促淤的特点,在三峡工程蓄水运用后清水下泄促淤有限的条件下,框架群在护滩边缘的防护效果明显,但对其作用机理,特别是透水框架群在整治工程中的水力特性还认识不足。通过水槽试验研究了透水框架群的减速率与摆放高度、孔隙率等因素的相互关系,并对透水框架群内部和尾部的减速效果进行了深入分析,研究结果可为规范护滩边缘结构的设计提供技术支撑。

Penetrating frame groups in the Yangtze River renovation work is characterized by deceleration, erosion protection and deposit-promoting. Under the limited depositing-promoting condition with the clean water in the operation of water conservancy in the Three Gorges Project, the protective effect of frame groups in beach protection edge is significant. But people are still lack of the knowledge in the mechanism of action of the penetrating frame groups, especially in the hydraulic characteristics of penetrating frame groups in the renovation project. This paper studies the relationship between the deceleration rate of the penetrating frame groups and display height, porosity and other factors via flume experiments, and analyzes the decelerating effects of the inside and tail parts of the penetrating frame groups. The results can provide technical support to the structural design of beach protection edge.