渠首闸后防冲槽的抛石粒径与消能试验研究  

Experimental Study on Riprap Size and Energy Dissipation of Backwash Groove of Headgate

作　　者：李江峰 耿凡坤 尹辉 李娟 依玛木·赛都拉 LI Jiangfeng;GENG Fankun;YIN Hui;LI Juan;YIMAMU·Saidula(Xinjiang Research Institute of Water Conservancy and Hydropower,Urumqi,Xinjiang 830049,China;Xinjiang Jinghexian Water Conservancy Administration Office,Jinghe,Xinjiang 833300,China)

机构地区：[1]新疆水利水电科学研究院,新疆乌鲁木齐830049 [2]新疆精河县水利管理处,新疆精河833300

出　　处：《水利与建筑工程学报》2019年第6期117-122,181,共7页Journal of Water Resources and Architectural Engineering

基　　金：新疆维吾尔自治区公益性科研院所基本科研业务经费资助项目(KY2018120)

摘　　要：为了解决实际工程中的抛石粒径选择问题,利用模型试验开展抛石粒径与消能抗冲能力之关系研究。通过施放不同流量、抛填不同粒径卵石的水工模型试验,得出以下结论:在设置抛石防冲槽的渠首工程中,当几何结构尺寸不变时,槽内抛填卵石粒径的不同,不能改变相应流量下消能防冲槽内过水收缩断面及水跃断面之间的位置关系,而且总会存在一个最佳消能防冲的抛石粒径;抛填均匀粒径的卵石,其粒径不易过大,抛填混合粒径卵石时,保持中值粒径一致情况下改变粒径组合,对防冲槽内的消能效果影响不是很大。In order to solve this problem in practical engineering, the relationship between riprap particle size and energy dissipation and impact resistance was analyzed by model test. By casting and fill in the different flow hydraulic model test of different particle size of pebble, the following conclusions can be drawn: in ancient project setting riprap notching prevention, when the geometric structure size remains the same, groove throw fill the pebble grain size is different, which can’t change the water inside the corresponding flow dissipation but can prevent notching contraction section and the location of the relationship between the hydraulic jump section, and there will always be a best energy dissipation impingement riprap grain size;When throwing and filling pebbles with uniform particle size, their particle size should not be too large. When throwing and filling pebbles with mixed particle size, the combination of particle size is changed when the median particle size is the same, which does not have a great influence on the energy dissipation effect in the anti-punching groove. The conclusion can be widely used in the setting of the anti-flushing channel of the headlock, and it is of great significance to ensure the safe use of the headlock construction facilities.

关 键 词：防冲槽 抛石粒径 抗冲能力 消能 试验研究 

分 类 号：TV131.61[水利工程—水力学及河流动力学]