›› 2012, Vol. 33 ›› Issue (1): 238-242.

• Geotechnical Engineering • Previous Articles     Next Articles

Discussion on calculation method of salt dilating and frost-heave deformation occurred in sulphate saline soil subgrade

FENG Rui-ling1,WANG Peng-cheng1,WU Li-jian2   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Research Institute of Highway, Ministry of Transport, Beijing 100088, China
  • Received:2010-05-05 Online:2012-01-10 Published:2012-01-17

Abstract: Based on the tested ground temperature, salt dilating and frost-heave deformation etc. in the subgrade filled by the sulphate saline soil in site in corps reclamation area of Xinjiang Autonomous Region, using the multiple linear regression theory in SPSS software, the paper discusses the rule of the salt dilating and frost-heave deformation, the factors affect the salt dilating and frost-heave deformation, and the calculation method of the salt dilating and frost-heave deformation occur in the sulphate saline soil subgrade. The main conclusions are as follows. ①In one freezing and melting cycle, the tested ground temperature—salt dilating deformation curve can be separated into three phases, and the property of each phase is different. ②When the ground temperate is going up, the factors affecting the salt dilating and frost-heave deformation and the calculation method of the deformation are different from it when the ground temperate is lowered down. ③In one freezing and melting cycle, the maximum salt dilating deformation in the subgrade occurred when the ground temperature rises; thus the formula based on the data tested during the temperature rises is recommended to calculate the maximum salt dilating deformation.

Key words: sulphate saline soil, subgrade, salt dilating deformation, multiple linear regression

CLC Number: 

  • TU 411
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