In order to study the vertical permeability coefficient of the powdery clay layer in Jinan area,this paper relies on a foundation pit dewatering project of Jinan Rail Transit Line 3,uses precipitation test operation parameters to invert and simulate the permeability parameters of the geological strata,and obtains the permeability param-eters of the main soil layer,the silty clay layer,within the excavation range.According to the simulation inver-sion calculation,the permeability of the silty clay layer in this area is much higher than the parameters provid-ed in the survey report.
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