防渗渠道顶托渗漏量计算方法的理论探讨

Analytical method for seepage calculation in canals with lining

针对灌区高地下水位条件,探讨在饱和渗流水顶托条件下,采取防渗衬砌措施前后渠道渗漏量的理论计算方法,分析研究现有解析计算经典公式的特点及其适应性。根据水力学和水动力学原理,推出理论上可行、结构合理和简便适用的解析计算方法,并用数值模拟计算进行了验证,结果表明,本文解析法与数值法的计算结果比较接近。

On the basis of analysis on the characteristic and applicability of the current classical method for calculating the seepage water in canals, a theoretical method is suggested. The new method is deduced according to the principles of hydraulics and hydrodynamics and is applicable for the saturated seepage of canals under the condition of high groundwater table with lining or without lining. It is Simple in form and easy to be used. Its validity is verified by numerical calculation results.