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Sciences in Cold and Arid Regions ›› 2017, Vol. 9 ›› Issue (3): 307-311.doi: 10.3724/SP.J.1226.2017.00307

• ARTICLES • Previous Articles    

Deformation properties of chloride saline soil under action of a low-temperature environment and different loads

Yu Zhang1, JianKun Liu2, JianHong Fang3, AnHua Xu3   

  1. 1. Lanzhou Jiaotong University, School of Traffic and Transportation, Lanzhou, Gansu 730070, China;
    2. Beijing Jiaotong University, School of Civil Engineering, Beijing 100044, China;
    3. Qinghai Research Institute of Transportation, Xining, Qinghai 810001, China
  • Received:2016-11-15 Revised:2016-12-15 Published:2018-11-23
  • Contact: Yu Zhang, Ph.D., Associate Professor of School of Traffic and Transportation, Lanzhou Jiaotong University. No. 88, West Anning Road, Lanzhou, Gansu 730070, China. E-mail: zhangyu@mail.lzjtu.cn E-mail:zhangyu@mail.lzjtu.cn
  • Supported by:
    This research was supported by National Natural Science Foundation of China (No. 41501062).

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Abstract: To find the deformation properties of chloride saline soil under the influence of a low temperature environment and different loads,two types of chloride saline soil were selected and their deformation process was tested in the laboratory and analyzed during the cooling process in the sensitive cryogenic temperature range.The research results show that high-chloride-salt saline soil underwent little volume change under the no-load condition during the cooling process.Under staticload and dynamic-load conditions,different degrees of settlement deformation occurred;throughout the entire cooling process,another chloride saline soil with a high proportion of sulfate salt underwent volume expansion under no-load and static-load conditions.Under the no-load condition,a certain degree of settlement deformation occurred.Deformation properties were evaluated at different time points during the cooling process for two kinds of chloride saline soil.Finally, deformation characteristics of chloride saline soil were analyzed from the perspective of salt type and crystallization variation under the action of a low-temperature environment and different loads.

Key words: saline soil, low temperature, loads, deformation, cooling process

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