| Autor: |
Fumio Tatsuoka, Makoto Sakamoto, Taizo Kawamura, Shinji Fukushima |
| Rok vydání: |
1986 |
| Předmět: |
|
| Zdroj: |
Soils and Foundations. 26:65-84 |
| ISSN: |
0038-0806 |
| DOI: |
10.3208/sandf1972.26.65 |
| Popis: |
A series of drained plane strain compression tests was performed on saturated samples of fine angular to sub-angular sand at confining pressures from 0.05 kgf/cm2 (4.9 kN/m2) up to 4.0 kgf/cm2 (392kN/m2). Samples were prepared by the air-pluviation method with changing the angle δ of bedding plane to the σ1'-direction during plane strain compression tests from 0 to 90 degrees. It was found that in the plane strain compression tests the dependency of ϕ = arcsin {(σ1'-σ3')/(σ1'+ σ3')} max on σ3' is very small when σ3' is lower than around 0.5 kgf/cm2 as well as in the triaxial compression tests. Strong strength anisotropy was observed; ϕ has its minimum at δ between 23° and 34°. It was also found that this minimum value of ϕ in plane strain compression is similar to ϕ at this value of δ in triaxial compression. The tendency of such strength anisotropy was found rather insensitive to stress levels employed (σ3'=0.05 ~ 4.0 kgf/cm2). The stress-dilatancy relation at the peak stress condition was found to be a strong function of 5 whereas this relation was insensitive to the change of σ3'. The change of the deformation characteristics of sample with the change of σ3' was found to be rather small when σ3' is lower than around 0.5 kgf/cm2 as well. It was found that the strength anisotropy and deformation anisotropy as a function of δ are somewhat different. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
