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Hydraulic Test at AN-8 Borehole

Hirata, Yoichi*; Goto, Kazuyuki*; Matsumoto, Eiken*

This paper describes the result of hydraulic test with PNC Aquifer Test Method in Akeyo formation at AN-8 borehole. PNC Aquifer Test Method can measure permeability and pore water pressure. The investigation site is located in Tsukiyoshi, Akeyo, Mizunami City Gifu prefecture.The testing result is as follows.(1)The difference of pore water pressure at the section from GL-9.4m to GL-11.9m and at the section from GL-8.9m to GL-11.4m is rather small. Pore water pressure at the depth at the section from GL-11.9m to GL-14.4m is lower than others.(2)Permeability is computed by two theories. One of them is Hvorslev's theory and other is Cooper's theory. Using both theories, there are few variation between at from GL-9.4m to GL-11.9m and at from GL-8.9m to GL-11.4m. But at the depth at from GL-11.9m to GL-14.4m, there is some variation.(3)Permeability at from GL-8.9m to GL-11.4m is about twice as large as the ones at from GL-9.4m to GL-11.9m.



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