Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (5): 1479-1484.doi: 10.13278/j.cnki.jjuese.201505202

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Comparison Between Pressuremeter Test and Uniaxial Compression Test of Frozen Soil

Zhang Hu, Zhang Jianming, Su Kai, Liu Shiwei   

  1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2014-12-01 Published:2015-09-26

Abstract:

In order to identify the relationship between pressuremeter tests and indoor tests, the pressuremeter tests and uniaxial tests were performed and the comparisons between the test results were analyzed. The results indicate that the pressuremeter creep curve presents a decaying form; while a progressive flow stage appears in the uniaxial test once the frozen soil is broken. The stress-strain curves of pressuremeter test manifest a strain-hardening character with an initial quasi-elastic stage; while the uniaxial test shows a strain-softening stress-strain curve with peak strength at the axial strain of 10%. At the same temperature, the shear strength as well as the initial deformation modulus of pressuremeter test are greater than those of uniaxial tests; and the difference increases with the decreasing of temperature.

Key words: pressuremeter test, uniaxial compression test, shear strength, initial deformation modulus

CLC Number: 

  • TU413.3

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