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冰川冻土 ›› 2014, Vol. 36 ›› Issue (4): 1011-1016.doi: 10.7522/j.issn.1000-0240.2014.0122

• 冻土水文效应及水利工程抗冻技术 • 上一篇    下一篇

季节冻土区黄土路基水分与温度变化规律研究

毛云程1,2, 李国玉1, 张青龙1,2, 张坤1,2, 穆彦虎1   

  1. 1. 中国科学院 寒区旱区环境与工程研究所 冻土工程国家重点实验室, 甘肃 兰州 730000;
    2. 甘肃省交通科学研究院有限公司, 甘肃 兰州 730050
  • 收稿日期:2014-03-11 修回日期:2014-06-24 发布日期:2014-08-23
  • 作者简介:毛云程(1982-),男,甘肃张掖人,2006年在长沙理工大学获硕士学位,现主要从事黄土及寒区旱区公路工程研究.E-mail:mycbug1982@163.com
  • 基金资助:
    交通运输部西部交通建设科技项目(200831800025);甘肃省科技重大专项计划项目(143GKDA007);冻土工程国家重点实验室青年基金项目(SKLFSE-ZQ-20);冻土工程国家重点实验室开放基金项目(SKLFSE201107);中国科学院“西部之光”重点项目资助

Research on the moisture and temperature variation of loess roadbed in seasonally frozen ground regions

MAO Yuncheng1,2, LI Guoyu1, ZHANG Qinglong1,2, ZHANG Kun1,2, MU Yanhu1   

  1. 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. Gansu Provincial Transportation Research Institute Co., Ltd., Lanzhou 730050, China
  • Received:2014-03-11 Revised:2014-06-24 Published:2014-08-23

摘要: 为研究季节冻土区压实黄土路基变形的影响因素,通过现场监测得到路基水分场与温度场的变化规律,并结合室内试验与数值模拟分析路基变形规律. 结果表明,天然地面以上路堤土体具有明显的季节性,水分场及温度场变化剧烈,而天然地面以下土体温度场及水分场变化较平缓,季节性不强. 路堤最大冻深约1 m,经历强烈的冻融循环和干湿交替过程,含水率变化量为5%~29%. 冻融循环作用在路肩处产生的变形较大,而干湿循环作用在路基中心处产生的变形较大,且后者引起的变形大于前者.

关键词: 季节冻土区, 冻融循环, 干湿循环, 黄土路基

Abstract: In order to resolving the issue of compacted loess roadbed deformation in seasonally frozen ground regions, the variations of temperature and moisture of subgrade were studied on the base of in-situ monitoring. And then, the principal factors of roadbed deformation were analyzed in combination of laboratory test data and numerical simulation. It is found that temperature and moisture have a significant seasonal variation, which performs greatly within the embankment above the original ground surface, and not obvious under the original ground surface. The maximum frost depth in the embankment is about 1 m, along with strong freezing-thawing and dry-wet alternations. Water content varies between 5% and 29%. The deformation caused by freezing-thawing cycles on shoulder is larger than that in the middle of roadbed. However, the settlement due to dry-wet cycles is smaller in shoulder. The deformation due to dry-wet cycles is larger than that due to freezing-thawing cycles.

Key words: seasonally frozen ground regions, freezing-thawing cycles, dry-wet cycles, loess subgrade

中图分类号: 

  • U416.1