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冰川冻土 ›› 2016, Vol. 38 ›› Issue (4): 1183-1188.doi: 10.7522/j.issn.1000-0240.2016.0138

• 寒旱区重大工程问题 • 上一篇    

寒区路基改良土冻融循环与荷载耦合作用下损伤力学研究

崔宏环1 2, 刘建坤1, 张立群2, 李仲玉2   

  1. 1. 北京交通大学 土木建筑工程学院, 北京 100044;
    2. 河北建筑工程学院 土木工程学院, 河北 张家口 075000
  • 收稿日期:2016-01-20 修回日期:2016-07-01 出版日期:2016-08-25 发布日期:2016-09-19
  • 作者简介:崔宏环(1974-),女,河北张家口人,教授,2004年在中国矿业大学(北京)获硕士学位,现从事冻土基本性质与路基路面工程本构模型方面的研究.E-mail:cuihonghuan729@163.com
  • 基金资助:
    国家重点基础研究发展计划(973计划)项目(2012CB026104);国家自然科学基金项目(51378057);张家口市科学技术研究与发展计划项目(1411055A)资助

Research on damage mechanics of modified-soil in cold regions subgrade coupling action of freeze-thaw and load

CUI Honghuan1 2, LIU Jiankun1, ZHANG Liqun2, LI Zhongyu2   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
    2. School of Civil Engineering, Hebei Institute of Architecture and Civil Engineering, Zhangjiakou 075000, Hebei, China
  • Received:2016-01-20 Revised:2016-07-01 Online:2016-08-25 Published:2016-09-19

摘要: 以路基改良土作为研究对象,研究其在冻融受载耦合条件下的损伤演化规律.土体在冻融循环条件下的受载损伤,就可以等效为土体在2种加载下的损伤.以寒区路基工程为背景,考虑冻融与荷载的耦合作用,通过室内试验,研究了冻融循环作用下路基改良填料的强度和变形特性,在此基础上探索改良土路基内部土体发生在细观层次上的损伤形态和演化过程,建立冻融受载损伤模型.

关键词: 冻融循环, 损伤, 本构关系, 路基, 改良土

Abstract: In this paper, the modified-soil was taken as a research object, the study about the damage evolution equation in terms of freeze-thaw cycle and strain for the freeze-thaw and loaded soil based on micro mechanical mechanism was done. A series of tests were conducted, and the strength and deformation properties of modified-soil subjected to freezing and thawing were analyzed to investigate the freezing and thawing mechanism. And the evolutionary route of micro-structural damage and materials mechanical properties for the modified soil were discussed. The real damage propagation constitutive relation of the freeze-thaw and loaded for modified soil of subgrade was established by using the damage theory of strain equality.

Key words: freeze-thaw cycles, damage, constitutive relation, subgrade, modified-soil

中图分类号: 

  • TU43