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在洪水流量巨大的河流上建造拦河土壩或堆石壩,其施工期间的导流问题,我们从研究长江干支流的水利枢纽工程工作中,已经认识到:如果仅由导流隧洞或明渠以引导施工期间的全部洪水下泄,是十分不经济的。必须再从各方面采取可行而又有效的措施来降低枢纽造阶。现在,我将几处在建筑土壩或堆石壩施工过程中,让部分洪水漫过壩顶或透过壩体的国外资料编译成文,供进行施工导流设计时的参考。所引资料中,筑壩的年代从1915到1957年,壩高从45到120公尺,漫流的单宽流量从小于1秒公方到8.5秒公方,计划中甚至可能达到13.5秒公方。40多年来,
In the construction of dammed earth dam or rockfill dam on a river with huge flood flow and its diversion during the construction period, we have realized from the research on the works of the main tributaries of the Yangtze River that if only the diversion tunnels or open channels It is uneconomical to guide all the floods during construction. We must take feasible and effective measures from all quarters to reduce the level of construction of the hub. Now, I will compile several documents in the course of construction of earth mounds or rockfill dam so that some of the floods will diffuse across the crest or through the dam to compile a reference for the construction diversion design. The cited materials, the dams from 1915 to 1957, dam height from 45 to 120 meters, the flow of single-wide flow from less than 1 second to 8.5 seconds to the public square, the plan may even reach 13.5 seconds the public . For more than 40 years,