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冰川冻土 ›› 2016, Vol. 38 ›› Issue (4): 1074-1082.doi: 10.7522/j.issn.1000-0240.2016.0125

• 寒旱区重大工程问题 • 上一篇    下一篇

兰新客运专线浩门区间路基温度、水分及冻胀变形特征

牛富俊1, 林战举1, 吴旭阳1 2, 商允虎1 2, 李肖伦3, 邵珠杰3   

  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. 中国科学院大学, 北京 100049;
    3. 中铁第一勘察设计院集团有限公司, 陕西 西安 710043
  • 收稿日期:2016-02-07 修回日期:2016-07-15 出版日期:2016-08-25 发布日期:2016-09-19
  • 作者简介:牛富俊(1970-),男,甘肃会宁人,研究员,1998年在西安工程学院获博士学位,现从事寒区岩土工程及冻土环境方面的研究.E-mail:niufujun@lzb.ac.cn
  • 基金资助:
    中铁第一勘察设计院集团有限公司2016年度科研项目(院科16-11)资助

Characteristics of subgrade's temperature, moisture and frost heave deformation in Haomen, passenger railway line from Lanzhou to Xinjiang

NIU Fujun1, LIN Zhanju1, WU Xuyang1 2, SHANG Yunhu1 2, LI Xiaolun3, SHAO Zhujie3   

  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. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. China Railway First Survey & Design Institute Group Co., Ltd., Xi'an 710043, China
  • Received:2016-02-07 Revised:2016-07-15 Online:2016-08-25 Published:2016-09-19

摘要: 粗细颗粒混合填料的微冻胀严重影响着寒冷地区高速铁路的安全运营.基于对兰新客运专线浩门区间运营期4个路基断面不同深度的温度、水分及冻胀变形现场监测,分析了冻结期该铁路路基在不同深度下的温度、水分及冻胀随季节变化特征.结果表明:越接近地表,对外界环境温度变化的敏感性越高,温度传递随时间的滞后性呈指数递减规律,深度超过3 m时全年无负温.寒季2.7 m厚的路基最大冻胀量约2.1 cm,其中,0~0.5 m处寒季最低温度介于-10.3~-15.6℃,暖季及冻结初期含水量相对较高有15%左右,其冻胀率约4.86 mm·m-1,故级配碎石在低温含水量高情况下能有效减弱冻胀.冻胀率最大值(14.34 mm·m-1)发生在0.5~1.5 m之间的普通AB组填料层,寒季最低温度介于-7.2~-12.4℃,暖季及冻结初期含水量介于10%~15%.1.5~2.7 m之间的填料层冻胀率约为1.94 mm·m-1,寒季最低气温-3.2~0.4℃,暖季及冻结初期含水量介于12.5%~15%.路基填料细颗粒(粒径小于0.25 mm)含量越高,冻胀率越大,建议将细颗粒料控制在15%以内.

关键词: 高速铁路, 路基, 温度, 水分, 冻胀变形

Abstract: The safe operation in high-speed railway in cold regions are effected by feeble frost heave of subgrade' carrier with coarse particle and fine particle. Study the characteristics of temperature, moisture and frost heave deformation in different deep of subgrade, based on the 4 fracture surface where installing thermometers, moisture meter and frost heave instrument in different deep of subgrade in Haomen belong to the second line of Lanzhou-Xinjiang railway. The results show that the more sensitive of temperature the more close to the earth's surface, and there is no minus temperature under surface 3 m.The maximum value of frost-heave is 2.1 cm above 2.7 m layer. The deep of 0-0.5 m during the cold season the lowest temperature varies from -10.3℃ to -15.6℃. During warm and initial freezing period, the water content is relatively higher can be reach to 15%, frost heaving ratio is about 4.86 mm·m-1, so grading macadam under the condition of high moisture content and low temperature can effectively weaken the frost heave. The maximum rate of frost heave (14.34 mm·m-1) occurs between 0.5-1.5 m, which layer carrier is ordinary AB group. The lowest temperature varies from -7.2℃ to -12.4℃ in cold season. During warm and initial freezing period, the water content is between 10% and 15%. Between the deep of 1.5-2.7 m layer the frost heaving ratio is about 1.94 mm·m-1, the lowest temperature varies from -3.2℃ to 0.4℃ in cold season. During warm and initial freezing period, the water content is between 12.5% and 15%. The higher content of fine particle the more higher of the frost heaving ratio. Therefore the content of fine particles should be control under 15%.

Key words: high-speed railway, subgrade, temperature, moisture, frost heave deformation

中图分类号: 

  • U213.1+4