南水北调中线穿黄隧洞施工供水抽水试验研究

Experimental research of water pumping for water supply in construction of tunnel passing through the Yellow River of the middle route works of S-N water diversion project

穿黄隧洞工程是南水北调中线工程总干渠的关键性工程，为保证施工用水，在黄河北岸施工供水水源地进行大口径抽水试验，确定含水层水文地质参数，为施工供水设计提供依据。通过稳定流、非稳定流理论计算，提出渗透系数k为16～18m／d，并用裘布依公式计算得出影响半径与经验公式计算结果接近，故影响半径推荐值为1113m，并根据开采试验，确定单井可开采水量为177m^3／h。

The tunnel project passing through the Yellow River is a key project of the middle route works of S-N water diversion project.In order to supply water for construction,water pumping experiment with large diameter of pumping hole was carried out in water sources area on the north bank to determine hydrological and geological parameter of aquifer and provide design base for design.Through theoretic calculation of steady and non-steady flows,the suggested permeability coefficient k is 16 to 18 m/d,the influence radius calculated by Dupuit formula is similar to the result of empirical formula,the suggested influence radius is 1113 m,and according to mining experiment,the minable water quantity for unit well is 177 m3/h.