1994 Fiscal Year Final Research Report Summary
Development of Shear-Flow Coupling Test Apparatus of Rock Joints
| Project/Area Number |
04555151
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
資源開発工学
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
ESAKI Tetsuro Kyushu Univ., Faculty of Eng., Prrofessor, 工学部, 教授 (40038609)
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| Co-Investigator(Kenkyū-buntansha) |
SAITO Hiroyuki Kyushu Univ., Faculty of Eng., Res.Associate, 工学部, 助手 (70264091)
SHIKATA Koichi Kyushu Tokai Univ., Faculty of Eng., Lecturer, 工学部, 講師 (50243902)
TAKAHASHI Manabu Geological Surbey of Japan, Senior Res.Eng., 環境地質部, 主任研究官
KIMURA Tsuyoshi Inst.for Environmental Studies, Japan, Senior Res.Eng., 水土壌圏環境部, 主任研究員 (30161566)
JIANG Yujing Kyushu Univ., Faculty of Eng., Lecturer, 工学部, 講師 (50253498)
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| Project Period (FY) |
1992 – 1994
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| Keywords | Rock joint / Shear strength / Permeability test / Shear-flow couplig / Radioactive waste / Granite |
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| Research Abstract |
The subject of underground utilizations whose representative is radioactive waste disposal sites has enhanced the importance of investigating water flow characteristics of fractured rock masses.
From this point of view, a new testing apparatus has been developed to enable shear-flow coupling testing. This apparatus is employed for investigating the shear-dilation-flow characteristics of joints extending over the residual regions after a peak stress.
(1) A Shear-flow coupling test apparatus which allows large shear displacement and high normal stress was developed, and a testing procedure for control and measurement was established.
(2) Using this apparatus, the effect of shear deformation on hydraulic conductivity of a joint has been investigated for artificial jointed hard granite specimens.
(3) Hydraulic conductivities increased with increases of shear displacement at all ranges of considered to be an increasing of fracture aperture due to the riding and the break of asperities.
(4) Shear-flow characteristics obtained from the test agree with certain predictions, which take account of the theoretical and physical apertures, fractured surfaces.
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