| Project/Area Number |
17560427
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Kagawa University |
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Principal Investigator |
YOSHIDA Hidenori Kagawa University, Faculty of Engineering, Professor, 工学部, 教授 (80265470)
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| Co-Investigator(Kenkyū-buntansha) |
INOUE Junya Univ. Tokyo, School of Engineering, Assistant Professor, 大学院工学系研究科, 助教授 (70312973)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2006: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2005: ¥2,900,000 (Direct Cost: ¥2,900,000)
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| Keywords | excavation disturbed zone / formation of flow area / underground nuclear-waste repository / flow-deformation coupled behavior / rock mass / discontinuity / creep behavior |
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| Research Abstract |
In Japan, it is planned to dispose high-level radioactive waste and TRU waste in a stable rock mass. As for the HLW problems, it is necessary to ensure that residual radioactive substances are kept from reaching the biosphere after many thousands of years. Thus the mathematical model by which not only mechanical but also hydraulic behaviors can be predicted for a long-term is of prime importance. The mechanical and hydraulic properties of discontinuous rock mass have strong correlations respectively. In this study, a static test and a creep test with associated to the coupled behaviors are conducted with the use of an artificial specimen so as to seize the mechanism of the mechanical and hydraulic behaviors. Each test consists two type of specimen, one includes a discontinuity and the other does not have it. All tests are conducted under various confining pressures and various shapes of the discontinuity. Moreover, the numerical analysis by which the coupled behavior in the creep test is reproduced is carried on. Above all, the creep model that takes into account the deformation of discontinuity is proposed. The numerical result has modestly good accordance with the measured data. From the comparison of the experiment and the analysis, the mechanism of coupled behavior is discussed. In results, the proposed analysis model is modestly effective and can be utilized to estimate a long-term behavior of a discontinuous rock mass in an excavation disturbed zone (E.D.Z) around a disposal tunnel for nuclear wastes.
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