WES溢流坝水面线的简化计算

The simplified calculation of water surface line on WES overflow dam

WES溢流坝是水利工程中最常用的坝面形式之一,研究坝面水面线的简化计算对于工程设计具有重要意义。根据前人对WES溢流坝水面线的试验研究成果,通过计算机作图、利用能量方程和动量方程,研究了溢流坝曲线段、陡坡段和反弧段水面线的简化计算方法和WES曲线弧长的计算方法。提出了坝面曲线段和反弧段水面线的计算公式、溢流陡坡面水面线的显式计算公式、WES溢流坝曲线段曲线长度的计算公式。通过模型试验和前人实测资料对所提出的公式进行验证,结果表明,本文所提公式计算简单,WES曲线段最大误差为7.3191%、陡坡段最大误差为2.8363%、反弧段最大误差为3.6974%。

WES overflow dam is one of the most commonly used dam surface forms in water conservancy projects.The simplified calculation of water surface line on dam surface is of great significance for engineering design.According to the results of previous research on the WES overflow dam surface line,through the computer drawing,based upon the energy equation and the momentum equation,a simplified calculation method of the overflow section,the steep slope section and the reverse arc section water surface line and a calculation method of the WES curve arc length are studied.The calculation formula for the dam surface curve section and the reverse arc section water surface line is proposed;an explicit calculation formula of the overflow steep slope surface line and a calculation formula for the WES overflow dam curve section curve length are also obtained.The proposed formula is verified by model test and the existing measured data.The results show that the proposed formula is simple and accurate.The results can be used in the design of WES overflow dam.