Details
| Original language | English |
|---|---|
| Title of host publication | Computational Geomechanics, COMGEO II |
| Subtitle of host publication | Proceedings of the 2nd International Symposium on Computational Geomechanics |
| Pages | 262-271 |
| Number of pages | 10 |
| Publication status | Published - 2011 |
| Event | 2nd International Symposium on Computational Geomechanics, COMGEO II - Cavtat-Dubrovnik, Croatia Duration: 27 Apr 2011 → 29 Apr 2011 |
Publication series
| Name | Computational Geomechanics, COMGEO II - Proceedings of the 2nd International Symposium on Computational Geomechanics |
|---|
Abstract
In unstable soils, a special erosion process termed suffusion can occur under the effect of relatively low hydraulic gradients. The critical hydraulic gradient of an unstable soil is smaller than in stable soils, which is described by a reduction factor a. According to a theory of Skempton & Brogan (1994), this reduction factor is related to the stress conditions in the soil. In an unstable soil, the average stresses acting in the fine portion are believed to be smaller than the average stresses in the coarse portion. It is assumed that the stress ratio and the reduction factor for the hydraulic gradient are almost equal. In order to prove this theory, discrete element modeling was carried out. Models of stable and unstable soils were established, and the stresses inside the sample were analysed. It was found that indeed in unstable soils the coarse grains are subject to larger stresses. The stress ratios in stable soils are almost unity, whereas in unstable soils smaller stress ratios, which are dependent on the soil composition and on the relative density of the soil, were obtained. A comparison with results of erosion tests shows that the stress.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Mathematics(all)
- Computational Mathematics
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Computational Geomechanics, COMGEO II : Proceedings of the 2nd International Symposium on Computational Geomechanics. 2011. p. 262-271 (Computational Geomechanics, COMGEO II - Proceedings of the 2nd International Symposium on Computational Geomechanics).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Discrete element modeling of stress conditions in unstable soil
AU - Ahlinhan, M. F.
AU - Achmus, M.
PY - 2011
Y1 - 2011
N2 - In unstable soils, a special erosion process termed suffusion can occur under the effect of relatively low hydraulic gradients. The critical hydraulic gradient of an unstable soil is smaller than in stable soils, which is described by a reduction factor a. According to a theory of Skempton & Brogan (1994), this reduction factor is related to the stress conditions in the soil. In an unstable soil, the average stresses acting in the fine portion are believed to be smaller than the average stresses in the coarse portion. It is assumed that the stress ratio and the reduction factor for the hydraulic gradient are almost equal. In order to prove this theory, discrete element modeling was carried out. Models of stable and unstable soils were established, and the stresses inside the sample were analysed. It was found that indeed in unstable soils the coarse grains are subject to larger stresses. The stress ratios in stable soils are almost unity, whereas in unstable soils smaller stress ratios, which are dependent on the soil composition and on the relative density of the soil, were obtained. A comparison with results of erosion tests shows that the stress.
AB - In unstable soils, a special erosion process termed suffusion can occur under the effect of relatively low hydraulic gradients. The critical hydraulic gradient of an unstable soil is smaller than in stable soils, which is described by a reduction factor a. According to a theory of Skempton & Brogan (1994), this reduction factor is related to the stress conditions in the soil. In an unstable soil, the average stresses acting in the fine portion are believed to be smaller than the average stresses in the coarse portion. It is assumed that the stress ratio and the reduction factor for the hydraulic gradient are almost equal. In order to prove this theory, discrete element modeling was carried out. Models of stable and unstable soils were established, and the stresses inside the sample were analysed. It was found that indeed in unstable soils the coarse grains are subject to larger stresses. The stress ratios in stable soils are almost unity, whereas in unstable soils smaller stress ratios, which are dependent on the soil composition and on the relative density of the soil, were obtained. A comparison with results of erosion tests shows that the stress.
UR - http://www.scopus.com/inward/record.url?scp=80052135334&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:80052135334
SN - 9789609875011
T3 - Computational Geomechanics, COMGEO II - Proceedings of the 2nd International Symposium on Computational Geomechanics
SP - 262
EP - 271
BT - Computational Geomechanics, COMGEO II
T2 - 2nd International Symposium on Computational Geomechanics, COMGEO II
Y2 - 27 April 2011 through 29 April 2011
ER -