低实用堰水力特性及其对工程的影响  

Hydraulic Characteristic of Low Practical Weir and Its Influence on Engineering

作　　者：吴国君[1] 刘晓平[1] 方森松[1] 孙文红[1] 侯斌[2] 

机构地区：[1]长沙理工大学水利学院,长沙410076 [2]中国国际工程咨询公司基础建设业务部,北京100048

出　　处：《长江科学院院报》2011年第9期21-24,共4页Journal of Changjiang River Scientific Research Institute

基　　金：湖南省交通厅科技创新项目(200732)

摘　　要：通过物理模型试验和数学模型相结合的手段,对比分析了某低水头水利枢纽在运行中WES堰和改进后折线型实用堰的行洪能力和过沙能力。结果表明:2种堰型均能满足规范中平原地区的行洪能力要求,而WES堰的行洪能力略优于改进后折线型实用堰,但改进后折线型实用堰的堰面紊动强度较大、范围较广,能有效增强水流挟沙能力,易使泥沙起动,一定程度上能避免堰面泥沙淤积问题,从而保证检修闸门正常工作,保障枢纽安全运行。综合对比分析,推荐采用改进后折线型实用堰。The good discharge capacity and sediment transport capacity of WES weir and improved practical weir with polygonal line in a low-head hydro-junction are comparatively analyzed through physical model and mathemati- cal model. The results indicate that the two types of weir both meet the requirements of norms and regulations for flood discharge in plain area. The discharge capacity of WES weir is better than that of the practical weir; whereas the improved practical weir is more beneficial for the normal operation of bulkhead gate and the safe running of the whole hydro-junction as it has intensified and wide weir surface turbulence, which will increase the sediment transport capacity and enable the sediment initiate easily, thus refraining from sedimentation to a certain extent. By comprehensive comparison, the improved practical weir with polygonal line is finally recommended.

关 键 词：水利枢纽 实用堰 行洪能力 过沙能力 

分 类 号：TV135[水利工程—水力学及河流动力学]