HYDRAULIC TESTING APPARATUS

PROBLEM TO BE SOLVED: To provide a hydraulic testing apparatus of high versatility applicable to various hydraulic tests. SOLUTION: This hydraulic testing apparatus 20 comprises: packers 2a, 2b installed in a bore hole 1; a first communicating pipe 3 serving for communication between a test section Z formed by the packers 2a, 2b and a ground facility; a first on-off valve 3a provided near the test section Z to open/close a passage of the first communicating pipe 3; and a borehole pump 5 provided above the first on-off valve 3a to pump up underground water toward the ground facility through the first communicating pipe 3. The borehole pump 5 has a passage serving for communication between the upper side and lower side of the borehole pump 5 so as not to block the first communicating pipe 3 in a stop state. COPYRIGHT: (C)2010,JPO&INPIT