Rate effect on residual strength of crushed claystone
Abstract
Abstract:Drained ring-shear tests were carried out on four crushed samples of claystone collected adjacent to a landslide sliding surface in the Three Gorges area of China. Two samples were of particles between 0.1mm and 2mm in diameter, and the other two of coarser particles from 2mm to 5mm. Test results on dry samples with either finer or coarser particles showed little change in residual strength at different shear speeds, and a similar result for a saturated finer sample. However, a saturated coarser sample showed an abrupt decrease in residual strength when the shear speed reached a certain threshold value which reversed when the shear speed slowed. We suggest that the phenomenon may be explained by flow of liquefied clay from the shear surface into the more permeable coarser debris. Key words:Landslide, sliding surface, ring shear
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFM.S33C2849H
- Keywords:
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- 7209 Earthquake dynamics;
- SEISMOLOGYDE: 7215 Earthquake source observations;
- SEISMOLOGYDE: 8004 Dynamics and mechanics of faulting;
- STRUCTURAL GEOLOGYDE: 8163 Rheology and friction of fault zones;
- TECTONOPHYSICS