Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (4): 1174-1181.doi: 10.13278/j.cnki.jjuese.20180034

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Effect on Temperature Field of Subgrade Cold Resistive Layer in Seasonal Frost Region

Li Changyu1, Ma Guixia1, Hao Guang2, Xu Liang1   

  1. 1. College of Civil Engineering, Changchun Institute of Technology, Changchun 130021, China;
    2. Yunnan Design Institute Group Survey Institute, Kunming 650223, China
  • Received:2018-01-24 Online:2018-07-26 Published:2018-07-26
  • Supported by:
    Supported by National Natural Science Foundation of China(51778063)

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Abstract: In order to study the temperature field effect on the cold resistance layer of road subgrade in a seasonal frozen region, based on the ANSYS software thermal analysis principle, three kinds of cold resistance layer materials (fly ash soil, fly ash soil mixed with rubber particles, and fly ash soil mixed with polypropylene fibrer) were studied through simulating a seasonal frozen soil subgrade temperature field. The biggest frozen depth of the road subgrade cold resistance layer built by fly ash soil mixed with rubber particles was 0.94 m, and its lowest temperature gradient was -23.563℃/m; The biggest frozen depth of the subgrade cold resistance layer by fly ash soil was 1.32 m,and its lowest temperature gradient was -17.606℃/m; While the biggest frozen depth of the subgrade cold resistance layer by the fly ash soil mixed with polypropylene fibrer was 1.20 m,and its lowest temperature gradient was -19.557℃/m. The cold resistance effect of the ash soil mixed with rubber particles is the best. To keep roadbed soil unfrozen, the minimum paving thickness was 0.33 m. The fly ash soil modified by rubber particle is suitable as a cold resistance material in seasonal frozen area.

Key words: temperature field, cold resistivity layer, fly ash soils, rubber particles, cold resistivity effect

CLC Number: 

  • U414.1
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