Structural index and dynamic strength attenuation characteristics of structural loess in Pan'an

  • SUN Ping ,
  • LI Rongjian ,
  • LIU Junding ,
  • ZHANG Yuan ,
  • ZHANG Shuai
  • 1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;
    2. Key Laboratory of Neotectonic Movement and Geohazard, Ministry of Land and Resources, Beijing 100081, China;
    3. Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048, China

Received date: 2015-06-02

  Revised date: 2015-11-10

  Online published: 2016-03-25


Based on the unconfined uniaxial compression tests of Pan'an loess, the structure index and the structure variations between the intact loess and the remolded loess are analyzed. Then, by means of dynamic triaxial tests, the comparison is performed for dynamic strength attenuation characteristics between natural intact loess, remolded loess, saturated intact loess and saturated remolded loess. Results show the followings. Owing to the structure of loess, the dynamic strength of natural intact loess with stronger structure is obviously higher than that of remodeled loess; though the saturation process makes the dynamic strength of intact loess reduced greatly, the dynamic strength of saturated intact loess is still higher than that of the saturated remodeled loess, and the dynamic pore pressure of saturated intact loess grows significantly slower than that of the saturated remodeled loess. In addition, the dynamic strength curves of loess with stronger structure will not be normalized.

Cite this article

SUN Ping , LI Rongjian , LIU Junding , ZHANG Yuan , ZHANG Shuai . Structural index and dynamic strength attenuation characteristics of structural loess in Pan'an[J]. Science & Technology Review, 2016 , 34(5) : 74 -78 . DOI: 10.3981/j.issn.1000-7857.2016.05.008


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