1997 Fiscal Year Final Research Report Summary
Mechanism of progressive failure of saturated heavily overconsolidated clay/dense sand based on experiments and soil-water coupled deformation analysis
| Project/Area Number |
08455221
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
ASAOKA Akira NAGOYA UNIVERSITY,CIVIL ENG., PROFESSOR, 工学研究科, 教授 (50093175)
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| Co-Investigator(Kenkyū-buntansha) |
FERNANDO G.S.K. NAGOYA UNIVERSITY,CIVIL ENG., ASSOCIATE PROFESSOR, 工学研究科, 助手 (80283422)
NODA Toshihiro NAGOYA UNIVERSITY,CIVIL ENG., ASSOCIATE PROFESSOR, 工学研究科, 助教授 (80262872)
NAKANO Masaki NAGOYA UNIVERSITY,CIVIL ENG., ASSISTANT PROFESSOR, 工学研究科, 助教授 (00252263)
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| Project Period (FY) |
1996 – 1997
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| Keywords | Overconsolidated Soil / Soil-water coupled behavior / Progressive failure / Finite Deformation Theory / Laboratory Experiment / Finite Element Method / Plastic non-stability / Softening with Swelling |
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| Research Abstract |
This research describes the numerical simulation results of the laboratory seepage failure experiment on dense sand. The analysis was concerned with three drainage conditions : undrained, partially drained and fully drained. The dense sand ground reaches the instability due to diminishing effective stress that resulted by the excess pore pressure gradient. When the dense sand is loaded rapidly (undrain condition) and afterwards the load is held, the condition within the sand mass changes to drained condition finally resulting the progressive failure. This behavior is similar to the occurrence of Liquefaction after an earthquake. The RPFEM cannot be used to predict the failure of dense sand under undrained condition. However, the soil-water coupled deformation analysis is capable of making satisfactory predictions in such a cade.
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