Comparative experimental study on frost deformation characteristics of saturated rock under uniform freezing and uni-directional freezing conditions

被引：0
|
作者：
Xia C. [1 ,2 ]
Li Q. [1 ,2 ]
Lyu Z. [1 ,2 ]
Wang Y. [1 ,2 ]
Huang M. [1 ,3 ]
机构：
[1] Department of Geotechnical Engineering, Tongji University, Shanghai
[2] Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai
[3] College of Civil Engineering, Shaoxing University, Shaoxing, 312000, Zhejiang
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2018年 / 37卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Frost deformation; Non-uniform frost; Rock mechanics; Uni-directional freezing; Uniform freezing;
D O I：
10.13722/j.cnki.jrme.2017.0289
中图分类号：
学科分类号：
摘要：
The freezing process of rock surrounding tunnels in cold regions is uni-directional along the radius, which is different from the uniform freezing in normal frost heave experiments of rock. A series of freezing experiments on saturated sandstone under uniform freezing and uni-directional freezing conditions were thus conducted in a closed system respectively. The test results show that the frost heave of saturated sandstone is uniform in different directions under uniform freezing condition, and that the variation process can be divided into three stages: a thermal contraction stage, a frost heave stage and a stable stage. However, under uni-directional freezing condition, the frost heave parallel to the freezing direction is much larger than that perpendicular to the freezing condition. Moreover, the variation process of the frost heave perpendicular to the freezing direction can still be divided into three stages as above. However, in the variation process of the frost heave parallel to the freezing direction, four stages are observed: a thermal contraction stage, a frost heave stage, a frost heave declining stage and a stable stage. The non-uniform frost heaving coefficient is in the range of 2.20 to 2.71 when the temperature gradient is in the range of 0.7 to 2.2℃/cm and the non-uniform frost heaving coefficient has the linear relationship with the temperature gradient. The greater the temperature gradient is, the greater the non-uniform frost heaving coefficient is. © 2018, Science Press. All right reserved.
引用
收藏
页码：274 / 281
页数：7
相关论文
共 17 条
  • [1] Zhang J., Qiu W., In-situ test and data analysis of frost-heave force of Kunlun Mountain Tunnel, Rock and Soil Mechanics, 27, pp. 564-568, (2006)
  • [2] Wu Z., Lai Y., Zang E., Et al., Cold Region Tunnel Engineering, (2003)
  • [3] Kitagawa S., Kawakami Y., Deformation of tunnel and ground freezing in cold regions, Translated Collection of Tunnel, 3, pp. 14-34, (1987)
  • [4] Lai Y., Wu H., Wu Z., Et al., Analytical viscoelastic solution for frost force in cold-region tunnels, Cold Regions Science and Technology, 31, 3, pp. 227-234, (2000)
  • [5] Tao L., Experimental study of the relationship between the forst heave ratio and the water content of the rock, Proceedings of the First Session of the East China geotechnical Conference, pp. 387-396, (1990)
  • [6] Matsuoka N., Mechanisms of rock breakdown by frost action: an experimental approach, Cold Regions Science and Technology, 17, 3, pp. 253-270, (1990)
  • [7] Kang Y., Liu Q., Zhao J., Et al., Research on frost deformation characteristics of rock and simulation of tunnel frost deformation in cold region, Chinese Journal of Rock Mechanics and Engineering, 31, 12, pp. 2518-2526, (2012)
  • [8] Mellor M., Phase composition of pore water in cold rocks, (1970)
  • [9] Xia C., Huang J., Han C., Et al., Evaluation of the frost-heave ratio and classification of the frost heave susceptibility for rock mass around cold region tunnel, Chinese Journal of Rock Mechanics and Engineering, 32, 9, pp. 1876-1885, (2013)
  • [10] Huang J., Xia C., Han C., Et al., The analytical solution of frost heave force acting on cold-region tunnel liner considering the anisotropy frost heaving of the surrounding rock, Chinese Journal of Rock Mechanics and Engineering, 34, pp. 3766-3774, (2015)
12