| In this paper、problems evaluating the Lugeon value in the present Lugeon Water Test executed in an unsaturated soft rock foundation above the ground water surface as described above and measures which effectively resolve such problems have been clarified through long-term permeability tests at an actual dam site. At the same time、appropriate permeability evaluation methods have been discussed. In addition、the quantity of execution of dam foundation grouting has been lowered by appropriately evaluating permeability in soft rock foundations while considering the results of long-term permeability test results. |
