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Experimental study on dynamic tri-axial test of saturated gravel soil of Toutun river basin in Xinjiang |
ZHANG Lingkai |
College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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Abstract The dynamic deformation properties of saturated gravel soil are studied under a dynamic loading by using tri-axial test in laboratory. The effort is mainly focused on the influence of vibration frequency, consolidation pressure and consolidation stress ratio on the dynamic constitutive relation and dynamic modulus of elasticity. It is indicated that the dynamic stress-strain curve is of hyperbolic type, and approaches gradually towards the stress axis direction with the increase of consolidation pressure and consolidation stress ratio, but the vibration frequency has a less effect on the stress-strain curve of the gravel soil. The dynamic elastic modulus decreases with the increase of dynamic strain, but remains nearly unchanged at last. The vibration frequency affects the curves less because the experimental data are generally in the same zone; the consolidation pressure and consolidation stress ratio, however, demonstrate a great influence on the curves. The Ed/Ed max-εd curves under different vibration frequencies and consolidation pressures have a relatively good normalization property, while those under various consolidation stress ratios do not.
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Received: 11 June 2015
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