本文選題：截流 + 加糙　； 參考：《水電能源科學》2017年04期

【摘要】：截流工程是水電工程建設(shè)極其重要的環(huán)節(jié)。針對截流時龍口水力學指標過高,拋投料流失嚴重的問題,結(jié)合某工程實例,通過模型試驗對比研究了S型龍口、S型龍口和導沙坎開孔、河床加糙、攔石柵立體加糙四種截流方式的水力學指標變化規(guī)律。結(jié)果表明,攔石柵立體加糙方案的龍口落差減少率、龍口流速減少率以及龍口單寬功率減少率分別為10%、30%、20%,此外,該方案還能有效減小拋投料流失率,尤其是大塊石料等人工特殊料使用量減少率高達67%,大大降低了施工難度和成本。這種方式尤其適用于龍口落差大、流速快、單寬功率大且大塊石缺乏的工程。
[Abstract]:The closure project is an extremely important link in the construction of the hydropower project. In view of the problem of the high hydraulic index of the dragon mouth and the serious loss of throwing material, the hydraulic indexes of the four types of S type Longkou, S type dragon mouth and guide Shah Can Cacon, the river bed roughness and the stereoscopic roughness of the barrage are studied by the model test. The results show that the reduction rate of the dragon mouth drop, the reduction rate of the dragon mouth flow rate and the reduction rate of the single wide power of the dragon mouth are 10%, 30% and 20% respectively. In addition, the scheme can effectively reduce the loss rate of throwing materials, especially the reduction rate of artificial special materials such as large blocks of stone, which greatly reduces the difficulty of construction. This method is especially suitable for projects with large gap, fast flow speed, single width and large power and large stone shortage.

【作者單位】： 四川大學水力學與山區(qū)河流開發(fā)保護國家重點實驗室;
【基金】：國家自然科學基金項目(5151101496)
【分類號】：TV551.2
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本文編號：1860762