潜水非完整井抽水试验对细砂层渗透系数的测定

Determination of Permeability Coefficient of Fine Sand Layer by Phreatic Non-Complete Well Pumping Test

地下含水层的渗透系数是水文地质勘察中的重要参数之一,不同试验类别、不同计算方法所得出的渗透系数也不尽相同。为避免产生较大的误差,勘察工作应选用最适宜的试验方案、最合理的计算方法。论文根据多层地下水情况,使用带1个观测孔的潜水非完整井对细砂层进行试验,并由此计算其渗透系数,为水文地质勘察提供依据。

The permeability coefficient of underground aquifer is one of the important parameters in hydrogeological exploration. The permeability coefficients obtained by different test types and different calculation methods are also different. In order to avoid large error,the most suitable test scheme and the most reasonable calculation method should be chosen in the reconnaissance work. In this paper,according to the condition of multi-layer groundwater, a phreatic non-complete well test with one observation hole is carried out for fine sand layer, and its permeability coefficient is calculated, which provides a basis for hydrogeological exploration.