铅丝笼丁坝附近流速场分布的试验研究  

Experimental Study on Velocity Field Distribution of Gabion Groin

作　　者：王振[1] 刘焕芳[1] 王燕燕[1] 

机构地区：[1]石河子大学水利建筑工程学院,石河子832003

出　　处：《石河子大学学报（自然科学版）》2013年第4期504-509,共6页Journal of Shihezi University(Natural Science)

基　　金：石河子大学高层次人才启动资金专项项目(RCZX200937)

摘　　要：为分析铅丝笼丁坝水毁机理、河床冲淤效果奠定基础,以及防治丁坝水毁和工程优化设计提供理论依据,本文进一步研究铅丝笼丁坝附近流速场分布规律。通过定床试验实测了铅丝笼丁坝作用后丁坝附近的自由水面和流速场,分析了丁坝附近水流流态和自由水面的变化规律;并对丁坝附近的流区沿纵向分段和沿横向分区,将丁坝附近的流速场详细的划分为9个小区,分别分析各区流速变化的规律,得出丁坝下游线性回流边线方程、断面最大流速边线方程以及坝下游各断面的流速分布公式。试验验证结果表明,以上方程和公式基本反映了丁坝坝轴断面至回流末端各断面的流速分布的变化趋势和基本特征。Based on the previous researches, the velocity field distribution of gabion groin was studied to lay a foundation for ana lyzing the damaged mechanism and the effect of riverbed evolution,and to provide theoretical basis for preventing the damage of groin and for engineering optimization design. By fixed bed experiment, in this article, the free surface and the velocity field under the influence of the groin had been measured,and the flow regime near the groin and the changing law of the free flow sur face had been analyzed. Along the longitudinal section and the horizontal partition, the flow region near the groin had been divid ed based on the previous studies. The velocity field near the groin had been divided into 9 areas and the velocity change rule had been discussed respectively. This paper put forward the downstream linear return equation, the section line equation of the maxi mum velocity,the velocity distribution formula of the downstream section, and then verified by the experimental results. Thc calculation results of the formula basically reflect the velocity distribution and the basic characteristics of each section from the groin axis to the end of the backflow.

关 键 词：铅丝笼丁坝 水流结构 自由水面 纵向垂线流速分布 

分 类 号：TV863[水利工程—水利水电工程]