滑坡体低渗透性含水层的虹吸抽水试验方法

由于抽水泵流量远远大于单孔单位涌水量,因而传统抽水试验在低渗透性含水层中"一抽即干",无法形成稳定流.本文利用小直径塑料管代替抽水泵进行了虹吸抽水试验,先进行了3mm和4mm塑料管对比试验,然后采用4mm塑料管,进行二路、四路、六路组合虹吸抽水试验.试验结果表明,多路塑料管的出水能力与低渗透性含水层涌水量匹配,可以形成...

Syphonage pumping test method for low-permeability aquifer of landslide

Since the pumping flow rate is much larger than the amount of water flowing in a single hole,the traditional pumping test can not form a stable flow in a low-permeability aquifer. In this paper,the syphonage pumping test is carried out by using small diameter plastic tube instead of pumping pump. The contrast tests with 3 mm and 4 mm plastic tube are carried out firstly,and then two,four and six way combined syphonage pumping tests are carried out with 4 mm plastic tube. The test results show that the water output capacity of the multiplex plastic pipes matches the water inflow of the low-permeability aquifer and can form a stable flow requested by Darcy law. It is suitable for the Dupuit formula,and the hydraulic conductivity and influence radius can be calculated. The experiment provides a new operation for the hydrogeological exploration of the landslide with low-permeability aquifer.