| Project/Area Number |
05650475
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geotechnical engineering
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| Research Institution | The University of Tokushima |
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Principal Investigator |
YAMAGAMI Takuo The University of Tokushima, Faculty of Engineering, Professor, 工学部, 教授 (90035642)
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| Co-Investigator(Kenkyū-buntansha) |
UETA Yasuhiro HANSIN CONSULTANTS CO., LTD., Consulting Engineer, 調査部, 副長
SUZUKI Hisashi The University of Tokushima, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80154574)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1994: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1993: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Anisotropy / Compacted soil / Shear strength / Cohesion / Angle of internal friction / Stability analysis / Slip surface / Factor of safety |
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| Research Abstract |
The purpose of this study is to clarify experimentally the anisotropic shear strength characteristics of a compacted soil and to develop a computer program for the slope stability analysis of embankments consisting of the soil considering the anisotoropic effect. The results may be summarized as follows :
1.A number of triaxial compression tests were conducted on the samples extracted at various angles from a compacted model ground. Then an anisotropic shear strength equation has been derived from the Coulomb equation, Mohr circles at failure and the inclination angle of the failure plane in each specimen.
2.Cohesion and angle of internal friction appearing in the shear strength equation are both functions of sample orientations. It is interesting to note that the functions have the same form as those proposed by McLamore et al.for anisotropic sedimentary rocks.
3.The cohesion and angle of internal friction are also expressed as functions of the angle between the shear plane and the bedding plane in each specimen. Stability analyzes performed based on these functions show that the shear strength anisotropy leads to smaller values of the factor of safety and flatter critical slip surfaces in shape than those obtained from the isotropic shear strength assumption.
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