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本文应用地下水动力学近似計算方法,探討了均匀入渗情况下,均貭土层排水地段内地下水恆定运动和不恆定运动特性。分析中考虑了不透水层埋藏深度对排水的影响,得到在不透水层埋藏深度較大时,計算入沟流量的关系式,和在不透水层埋藏深度較小时,有均匀入渗条件下,計算排水沟“不完整性校正系数”的公式。文中对排水地段中部地下水位和入沟流量随时間的变化,也进行了探討,提出根据地下水位控制标准,进行排水沟間距計算的方法和建議。最后用排水模型試驗資料和分析結果进行了比較。
In this paper, the groundwater hydrodynamic approximation method is applied to investigate the constant and unsteady groundwater movement in the drainage area of the soil layer under uniform infiltration. In the analysis, the influence of buried depth of impervious layer on drainage is taken into account, and the relation between the depth of impermeable layer and buried depth is obtained. When the depth of impermeable layer is small, under the condition of uniform infiltration, Calculate the formula for the “Imperfect correction factor” for drains. In the paper, the variation of groundwater level and ditch flow in the middle of the drainage area with time is also discussed. The method and suggestion of calculating the drainage ditch spacing according to the control standard of groundwater level are put forward. Finally, drainage model test data and analysis results were compared.