宽顶堰与陡坡连接断面水深实验研究  

Experimental study of broad-crest weir with steep slope to connect the flow depth

作　　者：翟兴涛[1] 张庆华[1] 张瑞她[1] 蒋磊[1] 

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018

出　　处：《武汉大学学报（工学版）》2013年第6期716-719,共4页Engineering Journal of Wuhan University

基　　金：水利部公益性行业专项项目(编号:201201115);山东省重大水利科研与推广项目(2012)

摘　　要：溢洪道水面线推求的起始断面一般选择在闸室末端，为此，需要确定该断面的水深，目前常用的做法是假定该断面的水深为临界水深．进行了宽顶堰与下游连接坡为垂直、1：1、1：5、1：10四种情况的水力学实验，实验结果表明宽顶堰与下游坡连接处的水深h均小于临界水深h。，h／h-值在0．7～0．95之间，其中0．76～0．90之间占76．18％，其规律为：下游坡相同情况下，单宽流量越大，h／ht越大；单宽流量相同情况下，下游坡越缓，h／hk越大．实验结果为溢洪道水面线推求确定起始断面水深提供了参考．The initial section that the water line of the spillway required is usually at the end of the cham- ber; hence we need to confirm the water depth of the section. Up to now, the most common way is to as- sume this depth as the critical depth. The research mainly carried out the broad-crest weir and down stream connection slope hydraulic experiment in four conditions： vertical, 1 ： 1,1 ： 5 ,1 ： 10. The results indicate that the depth at the conjunction of the broad-crest weir and downstream connection slope are all less than the critical water depth hk; the values of h/hk are in 0. 7 to 0. 95; and 0.76 to 0.9 occupies 76.18~//00. Therefore, the conclusion is drawn as follows. If the downstream connection is same, the grea- ter the single-width flow is, the greater the h/hk is; if the single-width flow is same, the lower the down- stream connection slope is, the greater the h/hk is. The experimental results provide the deriving of the water line of the spillway with consultation.

关 键 词：宽顶堰 连接断面 水深 临界水深 

分 类 号：TV132.22[水利工程—水力学及河流动力学]