关于堤坝坝顶高程计算中安全加高的讨论 Discussion on Safety Freeboard in Calculating Crest Elevation of Levee

摘要: 安全加高是确定堤坝坝顶高程的重要参数，直接影响防洪安全和经济性。本文基于现行规范和防洪工程资料，分析讨论了堤坝工程设置安全加高的必要性、取值原则和方法。研究表明，影响洪水漫顶的安全因素，基本上都可以定量确定，计算静水位以上的超高时没有必要再单独考虑安全加高。安全加高的规定与当前防洪工程发展形势不适应，与欧美发达国家通行做法不一致。建议构建柔性综合防洪体系，取消安全加高的规定，安全超高由浪高和风壅增高直接确定。 Safety freeboard, one of the important parameters to determine crest elevation levee, de-termines safety and economy flood control engineering in a great way. Based on current design codes some research materials, necessary selections freeboard corresponding different structures typical are studied. The results show that main factors overtopping can be quantitatively determined, so there is no need es-timate calculating dam height above static water level. Now, stipulation contradiction with development not consistent prevailing practice western developed countries. It revise applicable standards. When constructing flexible comprehensive system canceling elevation, just equal sum heights by waves wind.