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

• 论文 • 上一篇    下一篇

季冻区组合冷阻层应用表现的数值评价

张仰鹏1, 魏海斌1, 贾江坤2, 陈昭3   

  1. 1.吉林大学 交通学院,长春 130022;
    2.中国铁建十六局集团路桥工程有限公司,北京 101500;
    3.吉林省高等级公路建设局,长春 130033
  • 收稿日期:2016-12-29 出版日期:2018-02-26 发布日期:2018-02-26
  • 通讯作者: 魏海斌(1971-),男,教授,博士生导师. 研究方向:道路工程. E-mail:weihb@jlu.edu.cn
  • 作者简介:张仰鹏(1990-),男,博士研究生.研究方向:道路工程.E-mail: yangpengz16@mails.jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51578263).

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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摘要： 为改善季冻区道路冻害,提出了由XPS挤塑板和粉煤灰橡胶颗粒改良土共同组成路基冷阻层。采用含相变的瞬态热分析数值方法,对粉质黏土、单纯改良土和组合冷阻层结构路基的冬季表现进行对比分析,评价了组合冷阻层在冻融变化下的隔温效果和特点。结果表明,单纯改良土和组合冷阻层都能有效地改善路基温度场,提高冻结深度,但后者的提升效果更好。季冻区冷阻层在冷季能阻隔冷能量,在暖季也能阻隔热能量,且在冬季的冷阻效果更好。

关键词: 道路工程, 组合冷阻层, 带相变的数值分析, 冬季应用表现, 保温特点

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

中图分类号: 

  • U416.1
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