- Surface roughness effects on the shaft resistance of piles in dry sand
- J. Sadrekarimi ; Gouhari M. Behpour ; A. Roohimehr
- 17th International Conference on Soil Mechanics and Geotechnical Engineering (Alexandria)
- Year: 2009
- Pile Foundations ; Laboratory Testing
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- Surface Roughness Effects on the Bearing Capacity of Piles in Dry Sand
- J. Sadrekarimi ; M.B. Gouhari ; A. Roohimehr
- Book Title / Journal: The Electronic Journal of Geotechnical Engineering
- Year: 2009 , Volume: 14
- Foundation Design / Construction
- Keywords: Pile ; surface roughness ; shaft resistance ; sandpaper
- Description
- In order to delineate effects of surface roughness on the unit shaft resistance of piles
embedded in a dry natural fine sand mass, a research program comprising 25 axial loading
tests was carried out on 44 mm diameter model piles with different surface roughness. In
order to provide piles with different surface roughness they were wrapped with sandpapers
with different grits. The results indicate that when the average abrasive particles size of
sandpapers varies from 18.3 to 425 microns, the lateral earth pressure coefficient increases
from 0.95 to 1.75. This implies that pile surface roughness enhances the tendency of the sand
to dilate during loading, which increases magnitude of the radial effective stress against the pile surface. Also, it was disclosed that when the average abrasive particles size of sandpapers
varies from 18.3 to 425 microns, the unit shaft resistance increases from 2.5 to 9.1 kPa. These
results indicate that the pile shaft resistance increases due partially to the fact that the sand
mass-sand paper interface friction angle increases as the sand paper roughness increases. However, it also depends on the rise of radial effective stress due to dilation of sand during loading.
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- Performance of a large dam, field measurements and analytical approach
- J. Sadrekarimi ; M. Kia
- 16th International Conference on Soil Mechanics and Geotechnical Engineering (Osaka)
- Year: 2005
- Dam Engineering
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- Performance of a large dam, field measurements and analytical approach
- J. Sadrekarimi ; M. Kia
- International Conference on Soil Mechanics and Geotechnical Engineering - 16th International Conference on Soil Mechanics and Geotechnical Engineering (Osaka)
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- Dam Engineering ; Site Characterization & In-situ Testing (General)
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- Surface roughness effects on the shaft resistance of piles in dry sand
- J. Sadrekarimi ; M. BehpourGouhari ; A. Roohimehr
- International Conference on Soil Mechanics and Geotechnical Engineering - 17th International Conference on Soil Mechanics and Geotechnical Engineering (Alexandria)
-
- Pile Foundations ; Laboratory Testing
PDF |
