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An experimental study of heat and mass transfer in deformable sulfate saline soil during freezing

  • Daoyong WuEmail author
  • Yugui Yang
  • Xiangyang Zhou
  • Yong Wang
Original
  • 38 Downloads

Abstract

Heat and mass transfer coupling with soil deformation cause tremendous difficulties to the project construction in sulfate saline soil regions. The coupling effects of thermo-hydro-salt-mechanics in frozen saline soil were explored furtherly by experiment. It was shown that the external load, salt content and temperature boundary impact on the soil temperature differently. Thus, the variation of soil temperature leads to the precipitation and dissolution of crystals accompanying with the release and absorption of latent heat. The pore solution is discharged from the soil under the action of external load firstly, and then absorbed into the soil sample from the reservoir bottle after the crystal precipitation. The experimental results indicated that the volume expansion caused by phase change in the soil is not the main reason of frost heave. The soil deformation is produced by the interaction of external load and crystallization pressure. The external load compacted the soil samples instantaneously at the initial stage, while the gradually accumulation of crystallization pressure resulted in the soil heave. Finally, the cryostructure of frozen sulfate saline soil was discussed under different experimental conditions.

Keywords

sulfate saline soil heat and mass transfer phase change soil deformation 

Notes

Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grant Nos. 41761016 and 51574219); the first class subject foundation of Civil Engineering of Guizhou Province (Grant No. QYNYL[2017]0013), the construction project of Mountain Geohazard Prevention Research Center of Guizhou Province (Grant No. QKPT[2017]5402); the Scientific Research Foundation for Talent Introduced in Guizhou University (Grant No. 2016-80); and funded by the Key Laboratory of Karst Environment and Geohazard, Ministry of Land and Resources(Grant No. KST2017K01).

Compliance with ethical standards

Conflict interest statement

There is no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Daoyong Wu
    • 1
    Email author
  • Yugui Yang
    • 2
  • Xiangyang Zhou
    • 3
  • Yong Wang
    • 4
  1. 1.Key Laboratory of Karst Environment and Geohazard, Ministry of Land and ResourcesGuizhou UniversityGuiyang CityChina
  2. 2.State Key Laboratory for Geomechanics and Deep Underground EngineeringChina University of Mining and TechnologyXuzhouChina
  3. 3.College of Resource and Environmental EngineeringGuizhou UniversityGuiyangChina
  4. 4.College of Resource and Environmental EngineeringGuizhou UniversityGuiyangChina

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