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1)  open diversion channel
导流明渠进口段
1.
The review to investigation of construction method in open diversion channel of Three Gorges Project;
对三峡导流明渠进口段开挖方案研究的回顾与反思
2)  open diversion channel
导流明渠
1.
Numercial study of nonlinear relationship between velocity and bottom width&discharge in open diversion channel;
导流明渠流速与底宽及流量的非线性关系
2.
Application of orthogonal curve mesh in flow simulation of open diversion channel;
正交曲线网格在导流明渠模拟中的应用
3.
As competent authorities of navigation affairs, the Changjiang Administration of Navigation Affairs and other organizations have actively taken part in the decision?making that the open diversion channel would be used as a navigation pass in the second construction period of Three Gorges Project.
其有关部门参与了三峡工程导流明渠兼通航的决策 ,并开展了相应的试验研究工作 ,提出了船舶通过明渠的上、下行航线和进一步优化明渠通航条件的措施。
3)  diversion channel
导流明渠
1.
Excavation of diversion channel of Gaobazhou Hydroproject;
高坝洲水利枢纽导流明渠开挖
2.
Study on the key technology and engineering measures for earlier closure of TGP s diversion channel;
三峡工程导流明渠提前截流关键技术及措施研究
3.
The closure work of diversion channel of TGP is completed by means of end-dump advancing from both banks, it requires that the upstream closure dike should share two third of closure drop, and the downstream closure dike one third of closure drop.
三峡工程导流明渠采用双戗立堵截流 ,上下游戗堤分别承担 2 /3和 1/3落差 ,采用水力学计算确定相应落差分担关系下的进占协调关系和上下戗堤的龙口水力学参数 ,并对实际截流施工时的水力条件进行了反演计算。
4)  channel diversion
明渠导流
5)  Diversion channel closure
导流明渠截流
6)  alternate stages of open-channelflow
明渠水流更迭段
补充资料:明渠导流
      河水通过专门修建的渠道导向下游的施工导流方式。明渠导流多用于河床外导流,适用于河谷岸坡较缓,有较宽阔滩地或有溪沟、老河道等可利用的地形,且导流流量较大的情况。与隧洞导流比较,因明渠的过流能力较大,施工较方便,造价相对较低,在地形条件和枢纽布置允许时,用明渠导流的较多。在河床内用分期导流方式修建混凝土坝的初期导流阶段,也常采用明渠导流。在中期和后期导流阶段,可用其他泄水建筑物或在明渠内设底孔或缺口导流,以便使明渠所占的坝段可以施工升高。
  
  布置导流明渠时须考虑:①轴线位置,在地形上尽量利用垭口、溪沟、旧河道等,并力求布置在河湾凸岸的滩地;②明渠进水口要使水流顺畅,距围堰一定距离,防止冲刷坡脚;③进出口高程要根据流量、通航、过木、冲刷或淤积等条件综合比较确定;④明渠断面形式可采用矩形、梯形或复式断面,坡度大于临界坡度,并尽量减小渠道糙率,当渠底为软基时要防止渗漏。
  
  截至1985年,世界上最大的导流明渠是印度乌开堆石坝工程的明渠,设计导流流量45000m3/s。该渠长1372m,渠底最大宽度235m,渠道水深18.25~21m。巴西伊泰普水电站导流明渠宽100~150m,长约2000m,最大导流流量35000m3/s。
  

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