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地下水在层状含水层中的渗流规律与均质含水层中有较大不同。通过模型试验研究了层状含水层的渗流规律,并与不同计算方法的结果进行对比分析。研究结果表明,弱透水层类型对层状含水层渗流场影响较大;试验条件下,当夹层为粉质粘土时,按分层方法计算的自由水面线与试验结果接近;当夹层为粉砂时,按渗透系数加权平均的方法计算结果与试验结果接近;对于所有的夹层类型,考虑层间渗流补给的有限元方法的计算结果都与试验结果接近,可用于实际工程计算。
The seepage law of groundwater in layered aquifer is quite different from that in homogeneous aquifer. Through the model test, the seepage law of layered aquifer is studied and compared with the results of different calculation methods. The results show that the type of aquitard has a great influence on the seepage field of layered aquifer. Under the experimental conditions, when the interlayer is silty clay, the free water line calculated by stratification method is close to the experimental result. When the interlayer is silt , The calculation results by the weighted average permeability coefficient are close to the experimental ones. For all the sandwich types, the finite element method considering the seepage recharge of the interlayer is close to the experimental result and can be used in practical engineering calculation.