Abstract
Theis formula derived under the circumstance of unsteady flow pumping in infinite aquifer without impermeable boundary is the representation of analytic method solving unsteady well flow problem, which can not be applied to the case of impermeable boundary just limited by its premise condition: “infinite permeable border”. In this paper, the well flow model of pumping in aquifer with unsealed impermeable boundary is researched based on mapping theory and superposition principle. And then this model is applied to a typical field pumping test in Pudong working shaft deep foundation of South Xizang road river-crossing tunnel. The results show that the slope of draw down and pumping duration time curve will increase while the surrounding impermeable boundary comes into play.
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