2016 Fiscal Year Final Research Report
Effective Stress Coefficient of Rock for Peak and Residual Strengths
| Project/Area Number |
26420840
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Earth system and resources engineering
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 岩石 / 有効応力係数 / ピーク強度 / 残留強度 |
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| Outline of Final Research Achievements |
Modified Failure Envelope Method was developed and applied to some types of rocks. Effective stress dependent-effective stress coefficient was evaluated with the method which coefficient can represent failure envelope by effective stress. The modified method is better than conventional Failure Envelope Method because the modified method neither requires assumed failure envelopes nor trial and errors. The evaluated coefficients were formulated as a function of total stress and pore pressure, and installed in a finite element code. Stress severity around a underground rock cavern was analyzed and it was confirmed that stress severity was more precisely evaluated with the effective stress dependent-effective stress coefficient than conventional approaches.
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| Free Research Field |
岩盤工学
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