中小型土坝坝面排水系统的设计

Design of Drainage System in Medium and Small Dam Face

一般中小型土坝工程缺乏当地的高频率常遇洪水的自记雨量降雨强度资料 ,因此 ,无法以满足工程精度要求的设计径流量来设计坝面的排水系统。首次提出了一种可操作性强的简便方法 ,通过计算表格和 5年一遇 10min降雨强度等值线图及 6 0min降雨强度转换系数等值线图 ,可快捷地计算坝面排水的设计径流量 ,进而确定坝面排水系统的断面尺寸 。

In general medium and small scale earth dam project, due to lack of self-recording precipitation intensity data on local high (frequency) floods, there will be no way to have the designed runoff which can meet the project accuracy necessity for the design of dam face drainage system. A kind of strong operational simple method was put forward fist in this article. By means of using calculating table and 10 minutes precipitation intensity contour map in 5-year return periods and 60 minutes precipitation intensity transfer (coefficient) contour map, the designed runoff for the dam face drainage system can be calculated quickly and the cross section dimension of dam face drainage system can be confirmed as well as the design of dam face drainage system in more detail can be made.