Geomechanics and Engineering

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Experimental research on dynamic characteristics of frozen clay considering seasonal variation

  • Xuyang Bian (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology) ;
  • Guoxin Wang (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology) ;
  • Yuandong Li (School of Transportation Engineering, Nanjing Tech University)
  • Received : 2023.10.23
  • Accepted : 2024.01.26
  • Published : 2024.02.25
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Abstract

In order to study the soil seasonal dynamic characteristics in the regions with four distinct seasons, the soil dynamic triaxial experiments were conducted by considering the environmental temperature range from -30℃ to 30℃. The results demonstrate that the dynamic soil properties in four seasons can change greatly. Firstly, the dynamic triaxial experiments were performed to obtain the dynamic stress-strain curve, elastic modulus, and damping ratio of soil, under different confining pressures and temperatures. Then, the experiments also obtain the dynamic cohesion and internal friction angle of the clay under the initial strain, and the changing rule was summarized. Finally, the results show that the dynamic elastic modulus and dynamic cohesion will increase significantly when the clay is frozen; as the temperature continues to decrease, this increasing trend will gradually slow down, and the dynamic damping ratio will go down when the freezing temperature decreases. In this paper, the change mechanism is objectively analyzed, which verifies the reliability of the conclusions obtained from the experiment.

Keywords

Acknowledgement

This work was supported by the National Key Research and Development Program of China [2018YFD1100405];Scientific Research Fund of Institute of Engineering Mechanics, China Earthquake Administration [2018D19].

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