›› 2018, Vol. 39 ›› Issue (4): 1369-1376.doi: 10.16285/j.rsm.2016.1091

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Influence of principal stress direction and intermediate principal stress parameter on the small strain stiffness of reconstituted loess

LIN Qing-hui1, YAN Jia-jia2, DONG Mei2, ZHU Jian-feng3   

  1. 1. College of Architecture and Civil Engineering, Taizhou Vocational & Technical College, Taizhou, Zhejiang 318000, China; 2. College of Architecture and Civil Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China; 3. Faculty of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo, Zhejiang 315211, China
  • Received:2016-05-13 Online:2018-04-11 Published:2018-06-06
  • Supported by:

    This work was supported by the Program of Guangdong Academician Workstation (2013B090400024), the Open Fund of Key Laboratory of Geotechnical and Underground Engineering, Ministry of Education, Tongji University (KLE-TJGE-B1501) and the National Natural Science Foundation of China (51409142, 51608477).

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Abstract: A series of tests was carried out on reconstituted loess with a hollow cylinder apparatus equipped with high precision strain sensors with fixed principal stress direction. The mean principal stress p, principal stress direction ? and intermediate principal stress coefficient b were constant during shearing. A total of 21 specimens in 4 groups of experiments, including 3 groups with different main stress direction angles and 1 group with main stress coefficients, were completed. The stress, strain, strength, and small strain (2%. The initial stiffness was higher at the beginning of shearing and decreased quickly with the increasing of shear strain when shear strain >0.02%. Stiffness varying with shear strain could be simulated accurately with the exponential function.

Key words: reconstituted loess, principal stress direction, intermediate principal stress parameter, small strain stiffness

CLC Number: 

  • TU 433

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