Cumulative Strain Behaviour of Saturated Clay Under Transit Cyclic Loading

Abstract:

Based on the dynamic triaxial test of typical soils in Hangzhou area, the existed empirical calculation formulas of cumulative pore pressure and cumulative plastic strain are analyzed to recharacterized variables such as the cyclic stress ratio and the static deviator stress, therefor the modified formulas are proposed. Parameters of cumulative deformation calculation model that suitable for this area are also determined according to dynamic triaxial tests. Thereafter the modified formulas is applied in a subway project under construction in Hangzhou. Results show that both the the cumulative plastic strain and cumulative pore pressure in dynamic triaxial test have the power exponential function relationship with the vibration number, and an inflection point appears in curve when amounts to approximately 1000. The improved formulas basicly tally with test results, of which the cumulative plastic strain formula coinsides better. The formulas work well in calculating the long-term settlement of subway projects in Hangzhou area.

• Periodical: Advanced Materials Research (Volume 422)
• Pages: 409-415
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.422.409
• Online since: December 2011
• Authors: Shun Hua Zhou, Jing Shan Shi, Quan Mei Gong, Chang Ji
• Keywords: Cumulative Plastic Strain, Cumulative Pore Pressure, Cyclic Loading, Cyclic Stress Ratio, Dynamic Triaxial Test, Static Deviator Stress

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