›› 2010, Vol. 31 ›› Issue (3): 719-726.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Effective stress path and failure pattern of Nanjing fine sand with flake-shape structure under vibrating load of rail transit

LIU Xue-zhu 1, 2，CHEN Guo-xing1   

  1. 1. Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. Geotechnical Engineering Company of Jiangsu Province, Nanjing 210018, China
  • Received:2008-10-13 Online:2010-03-10 Published:2010-03-31

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Abstract:

A series of dynamic behavior tests on Nanjing fine sand with flake-shaped structure are performed by using WFI cyclic triaxial apparatus made in England. The dynamic behaviors of Nanjing fine sand with flake-shaped structure under different static deviator stresses and cyclic stress ratios are studied. Through comparing the effective stress path under cyclic loading with static loading, the process of liquefaction of saturated flake-shaped structural Nangjing fine sand with the development of pore-water pressure, including initial compact state, compression state and dilative state, are investigated. In addition, according to different combinations of static deviator stresses and cyclic stresses, two kinds of failure patterns with deviator stress reversal or without deviator stress reversal are observed including cyclic mobility and failure of accumulation residual strain; and the mechanism of the cyclic mobility is investigated preliminarily.

Key words: vibration loading of rail transit, Nanjing fine sand soil with flake-shaped structure, cyclic triaxial tests, failure pattern, effective stress path

CLC Number: 

  • TU 435
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