过水围堰混凝土面板水流脉动压力试验研究  

Model Test of Fluctuating Pressure on Concrete Facing Plate of Overflow Cofferdam

作　　者：张微 陈锐 王玥 

机构地区：[1]长江勘测规划设计研究有限责任公司,湖北武汉430010 [2]中国水利水电建设工程咨询西北公司,陕西西安710065

出　　处：《水电能源科学》2012年第1期145-148,共4页Water Resources and Power

摘　　要：针对过水土石围堰泄流时水流脉动压力作用对混凝土面板稳定非常不利的问题,以功果桥围堰为例,做了多个流量下的模型试验,获得了脉动压力强度等脉动压力特征值和脉动压力功率谱图,并结合试验中出现的不同水流流态,分析了相应的脉动压力变化规律。结果表明,水流脉动压力特性与水流流态变化特性一致。The intensity of fluctuating pressure has a negative effect on the safety of earth-rockfill overflow cofferdam when water discharges. Taking Gongguoqiao cofferdam for an example, a number of model tests are carried out under different flow. Pulse pressure characteristic and its power spectrum are obtained. Combined with the different flow pattern appeared in the test, the pulse pressure variation rule is analyzed. The results show that the characteristics of fluctuating pressure accord with the variation of flow pattern.

关 键 词：土石过水围堰 脉动压力 模型试验 混凝土面板 

分 类 号：TV131.61[水利工程—水力学及河流动力学]