吉林大学学报(工学版) ›› 2018, Vol. 48 ›› Issue (1): 121-126.doi: 10.13229/j.cnki.jdxbgxb20161415

• Orginal Article • Previous Articles     Next Articles

Numerical evaluation on application of roadbed with composite cold resistance layer inseasonal frozen area

ZHANG Yang-peng1, WEI Hai-bin1, JIA Jiang-kun2, CHEN Zhao3   

  1. 1.College of Transportation, Jilin University, Changchun 130022, China;
    2.China Railway 16th Bureau Group Luqiao Engineering Co. Ltd.,Beijing 101500,China;
    3.Jilin Provincial High Class Highway Construction Bureau,Changchun 130033,China
  • Received:2016-12-29 Online:2018-02-26 Published:2018-02-26

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Abstract: In order to solve road frost damage in seasonal frozen areas, a composite cold resistance layer of extruded polystyrene board (XPS) and silty clay modified by fly ash and crumb rubbers in road subgrade is proposed. Based on numerical thermal analysis with phase change, the temperature field, isothermal characteristics and freezing depth of roadbed, which is respectively replaced by silty clay, new modified soil and composite cold resistance layer, are analyzed and compared. Moreover, cold resistance effect and heat preservation characteristics of the composite cold resistance layer in freeze-thaw cycles are evaluated. The calculated results indicate that single modified soil and combination of XPS and modified soil can both improve the temperature environment and increase the freezing depth of the road significantly, but the cold resistance effect of the combination structure is better, especially in the center and shoulder of the road. The function of the cold resistance layer is to prevent cold erosion during cold period, but it also prevents heat during hot period. Moreover, the effect of the cold resistance layer in cold period is better.

Key words: road engineering, composite anti-frost layer, numerical analysis with phase change, application performance during winter, cold resistance effect and characteristic

CLC Number: 

  • U416.1
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