混凝土四面体用于海漫防护的试验分析  

Experimental Analysis of Concrete Tetrahedron in Application of Riprap Protection

作　　者：张雪媚 田忠[1] 王韦[1] ZHANG Xue-mei;TIAN Zhong;WANG Wei(State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《水电能源科学》2022年第11期146-149,119,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51939007)。

摘　　要：为探讨混凝土四面体用于柔性海漫时消能防冲的效果,对等量混凝土四面体的不同铺设方式展开试验研究,观测了单层和双层铺设混凝土四面体时的水流流态、水深、流速及冲坑范围等,分析了混凝土四面体对海漫的抗冲防护效果。试验结果表明,混凝土四面体能有效减缓下游水面波动、改善消力池后水流流态;与无混凝土四面体海漫相比,在小单宽流量下,海漫下游河床均未形成冲坑,在大单宽流量下,海漫下游河床的冲坑长度及深度减小显著;混凝土四面体对海漫本身及海漫下游河床均具有良好的防护效果。In order to explore the effect of concrete tetrahedrons on energy dissipation and scour protection in flexible riprap, research test was carried out on different laying ways of equal amount concrete tetrahedrons. The ability of concrete tetrahedrons to resist the erosive capacity of the water were analyzed based on the indicator parameters of flow regime, water depth, flow velocity and scour extent, laying concrete tetrahedrons in single or double. Experimental results show that the concrete tetrahedrons can effectively slow down the downstream water surface fluctuation and improve the flow regime behind the stilling basin. Compared with the non-concrete tetrahedrons, under the small unit discharge, the river bed downstream of the riprap did not form a scour. Under the large unit discharge, the length and depth of the scour in the downstream riverbed of the riprap decreased significantly;The concrete tetrahedrons have a good protective effect on riprap itself and the downstream riverbed of riprap.

关 键 词：柔性海漫 防护 混凝土四面体 冲坑 消能防冲 试验 

分 类 号：TV131.61[水利工程—水力学及河流动力学]