scholarly journals Centrifuge model tests on earth pressure and deformation of sewer trunk culverts

2010 ◽  
Vol 5 (3) ◽  
pp. 479-496
Author(s):  
Akitaka OHSUGI ◽  
Jun TOHDA ◽  
Hiroshi YOSHIMURA ◽  
Yuji INOUE
Keyword(s):  
Earth Pressure ◽  
Model Tests ◽  
Centrifuge Model ◽  
Centrifuge Model Tests

Stress-level effects in model tests on piles

1994 ◽  
Vol 31 (1) ◽  
pp. 28-41 ◽  
Author(s):  
William H. Craig ◽  
Suhail K. Sabagh
Keyword(s):  
Stress Level ◽  
Laboratory Experiments ◽  
Earth Pressure ◽  
Model Tests ◽  
Overburden Pressure ◽  
Centrifuge Model ◽  
Angle Of Friction ◽  
Lateral Earth Pressure ◽  
Widespread Belief ◽  
Centrifuge Model Tests

Results are presented from several series of centrifuge model tests of piles installed in beds of uniform dry sand. Using identical model geometries, but varying acceleration factors, the tests demonstrate quite clearly the nature and extent of stress-level variations on the performance of piles. The results are interpreted initially in terms of bearing capacity coefficients Nt and lateral earth pressure coefficients Ks, and subsequently in terms of angle of friction [Formula: see text], determined using available relationships. Controlled laboratory experiments with varying levels of overburden pressure around the piles indicated consistent reductions in Nt, and to a lesser extent in Ks. Quantitative interpretations in terms of angle of friction variations depend on selection from a range of empirical correlations available and have been made for two of those commonly used. Comparison of shaft loads in compression and extension confirms the widespread belief that there is a difference, which is found to vary quantitatively depending on the relative density. Key words : model tests, piles, sand, centrifuge, stress level.

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