Abstract
The permeability of dam foundations is generally evaluated by Lugeon water test. Lu values obtained by the test can be converted to coefficient of permeability, which would be needed in evaluating amount of leakage from reservoir, only in the case of laminar flow condition. For the jointed rock with open fissures, Lu values are liable to be underestimated, compared to those obtained on laminar-flow condition, due to turbulent flow in testing. In this paper, examining the various kind of field testing methods to evaluate permeability on laminar-flow condition, we have shown that these methods are useful comparing the results with the analytical solutions calculated based on the actual leakage flow.
