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Earthquake Engineering and Engineering Vibration

, Volume 17, Issue 4, pp 761–769 | Cite as

Shear strength of frozen clay under freezing-thawing cycles using triaxial tests

  • Miao Wang
  • Shangjiu Meng
  • Yiqiang Sun
  • Haiqing Fu
Article
  • 32 Downloads

Abstract

Using a new low-temperature dynamic triaxial apparatus, the influence law of freezing-thawing cycles on clay shear strength is studied. In this research, the concept of correction coefficients of freezing-thawing cycles on clay static strength, cohesion and internal friction angles is proposed, and the change patterns, correction curves and regressive formulae of clay static strength, cohesion and internal friction angles under freezing-thawing cycles are given. The test results indicate that with increasing numbers of freezing-thawing cycles, the clay static strength and cohesion decrease exponentially but the internal friction angle increases exponentially. The performance of static strength, cohesion and internal friction angles are different with increasing numbers of freezing-thawing cycles, i.e., the static strength decreases constantly until about 30% of the initial static strength prior to the freezing-thawing cycling and then stays basically stable. After 5–7 freezing-thawing cycles, the cohesion decreases gradually to about 70% of the initial cohesion. The internal friction angle increases about 20% after the first freezing-thawing cycle, then increases gradually close to a stable value which is an increase of about 40% of the internal friction angle. The freezing-thawing process can increase the variation of the density of the soil samples; therefore, strict density discreteness standards of frozen soil sample preparation should be established to ensure the reliability of the test results.

Keywords

seasonally frozen soil freezing-thawing cycles cohesion internal friction angle correction coefficient 

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Notes

Acknowledgement

This work is financially supported by the Scientific Research Fund of the Institute of Engineering Mechanics, China Earthquake Administration (2018D12), National Natural Science Foundation of Heilongjiang Province (E 2016045) and National Natural Science Foundation of China (No. 51378164; 51508140). These sponsors are gratefully acknowledged.

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Copyright information

© Institute of Engineering Mechanics, China Earthquake Administration and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Miao Wang
    • 1
    • 2
  • Shangjiu Meng
    • 1
    • 2
    • 3
  • Yiqiang Sun
    • 1
    • 2
  • Haiqing Fu
    • 4
  1. 1.Institute of Engineering MechanicsChina Earthquake AdministrationHarbinChina
  2. 2.Key Laboratory of Earthquake Engineering and Engineering VibrationChina Earthquake AdministrationHarbinChina
  3. 3.College of Civil Engineering and ArchitectureHarbin University of Science and TechnologyHarbinChina
  4. 4.Shandong Earthquake AdministrationJinanChina

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