ANALYSIS OF PUMPING TEST ON THE FIRST PHASE OF NO.1 IN NINGBO URBAN RAIL TRANSIT

The pumping tests on the hydrogeology,including one-drill pumping tests and multi-drill pumping tests,were carried out for the first phase of No. 1 in Ningbo Urban Rail Transit.According to the differences of environment and conditions,the formulas for one-drill,multi-drill pumping and water level recovery,were applied to obtain the permeability coefficients of the main aquifers in the typical sites.In the end,the permeability coefficients of the aquifers along the line were came up with,that put forward the basis for excavation and dewatering of the planned stations.