中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2017, Vol. 36 ›› Issue (8): 49-53.DOI: 10.3969/j.issn.1674-0696.2017.08.09

• 道路与铁道工程 • 上一篇    下一篇

交通荷载作用下新疆砾类土动本构关系试验研究

王婧1,刘大鹏1,杨晓华2   

  1. (1.江苏建筑职业技术学院,江苏 徐州 221116;2.长安大学 公路学院,陕西 西安 710064)
  • 收稿日期:2016-05-02 修回日期:2016-06-26 出版日期:2017-08-14 发布日期:2020-07-10
  • 作者简介:王婧(1982—),女,甘肃兰州人,讲师,主要从事交通工程方面的研究工作。E-mail:136089261@qq.com。
  • 基金资助:
    西部交通建设科技资助项目(2011318797600);江苏建筑职业技术学院校级科研项目(JYQZ16-04);江苏住建厅科技项目(2016ZD81)

Experimental Study on Dynamic Constitutive Relationship of Gravel Soil under Traffic Loading

WANG Jing1,LIU Dapeng1,YANG Xiaohua2   

  1. (1.Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,Jiangsu,P.R.China; 2.School of Highway,Chang’an University,Xi’an 710064,Shaanxi,P.R.China)
  • Received:2016-05-02 Revised:2016-06-26 Online:2017-08-14 Published:2020-07-10

摘要: 砾类土是新疆绿洲-荒漠区常用的一种路基填料,因此有必要研究其在交通荷载作用下的动本构关系。通过动三轴研究了不同工况时砾类土的动本构关系,发现可以采用R.L.Kondner双 曲线模型对砾类土的动本构关系进行描述,并得出了不同工况时模型参数。基于试验结果分析了含水率、围压、压实度、初始静偏应力和循环荷载作用频率等因素对砾类土动本构关系的影响 规律,得出了含水率和最佳含水率越接近,围压越大、压实度越高,砾类土动本构关系曲线越接近应力轴,初始静偏应力为0 kPa和10 kPa的动本构关系曲线较接近,动荷载作用频率为1 Hz和 2 Hz的动本构关系曲线也较接近。研究成果对新疆绿洲-荒漠区砾类土路基的应用具有重要的参考价值。

关键词: 道路工程, 砾类土, 交通荷载, 本构关系, 动三轴

Abstract: Gravel soil is a kind of commonly used subgrade filling in Xinjiang oasis-desert region,so it is necessary to study its dynamic constitutive relation under the traffic loading.Dynamic constitutive relationships of gravel soil under different conditions were studied through dynamic triaxial tests.It was found that dynamic constitutive relationship of gravel soil could be described by R.L.Kondner hyperbolic model,and then the model parameters under different conditions were obtained.The effect rules of water content,confining pressure,compaction degree,the initial static deviatoric stress and cyclic loading frequency on the dynamic constitutive relationship of gravel soil were studied based on the test results.The closer the relationship between moisture content and optimum moisture content,the greater the confining pressure,the higher the compaction degree, the dynamic constitutive relationship curve of gravel soil was closer to the stress axis.Dynamic constitutive relationship curve is relatively closer when the initial static deviatoric stress is 0 kPa and 10 kPa.It is also relatively closer when the dynamic load frequency is 1 Hz and 2 Hz.The study results have important reference value for the application of gravel soil subgrade in Xinjiang oasis-desert region.

Key words: highway engineering, gravel soil, traffic loading, constitutive relationship, dynamic triaxial test

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