A revised method for calculating stress release ratio in tunnel excavation

被引：0
作者：
Institute of Geotechnical and Underground Engineering, Huazhong University of Science and Technology, Wuhan [1 ]
Hubei
430074, China
机构：
[1] Institute of Geotechnical and Underground Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei
来源：
Yanshilixue Yu Gongcheng Xuebao | / 11卷 / 2251-2257期
关键词：
Numerical simulation; Stress release ratio; Tunnelling scheme; Volume loss ratio;
D O I：
10.13722/j.cnki.jrme.2015.0985
中图分类号：
学科分类号：
摘要：
To seek a simple and effective method for the calculation of the stress release ratio in tunnel excavation, a revised method was proposed via the volume loss ratio based on the principle that the stress release ratio was approximately equivalent to the release ratio of displacement. The calculation of the stress release ratios for tunnel in soft rock under different construction schemes was performed in detail and thus the variations of stress release ratios under different construction schemes were analyzed. The calculated results indicated that the stress release ratios were different for various excavation parts of different schemes. In general, the stress release ratio of latter excavated was larger than that of the part excavated earlier due to the disturbance effect of excavation. The average stress release ratio decreased gradually with the improvement of the schemes except for the CD excavation method. © 2015, Science Press. All right reserved.
引用
收藏
页码：2251 / 2257
页数：6
相关论文
共 19 条
  • [1] Li P., Zhang D., Zhao Y., Et al., Study of mechanical characteristics of secondary lining of large-section loess tunnel, Chinese Journal of Rock Mechanics and Engineering, 29, 8, pp. 1690-1696, (2010)
  • [2] Lai H., Xie Y., Liu M., Et al., Mechanical characterization for linings of shallow excavation metro tunnel in loess region, Chinese Journal of Geotechnical Engineering, 33, 8, pp. 1167-1172, (2011)
  • [3] Zhao Y., Li S., Zhao Y., Et al., Model test study of surrounding rock load releasing during super-large section tunnel excavation, Chinese Journal of Rock Mechanics and Engineering, 31, pp. 3821-3830, (2012)
  • [4] Sun J., Zhu H., Mechanical simulation and analysis of behavior of soft and weak rocks in the construction of a tunnel opening, Rock and Soil Mechanics, 15, 4, pp. 20-23, (1994)
  • [5] Galli G., Grimaldi A., Leonardi A., Three-dimensional modeling of tunnel excavation and lining, Computers and Geotechnics, 31, 3, pp. 171-183, (2004)
  • [6] JTGTD70-2010 Guidelines for design of highway tunnel, (2010)
  • [7] She J., He C., 3D elastoplastic numerical simulation of surrounding rock displacement in soft surrounding rock section during construction process, Chinese Journal of Rock Mechanics and Engineering, 25, 3, pp. 623-629, (2006)
  • [8] Pellet F., Roosefid M., Deleruyelle F., On the 3D numerical modelling of the time-dependent development of the damage zone around underground galleries during and after excavation, Tunnelling and Underground Space Technology, 24, 6, pp. 665-674, (2009)
  • [9] Wu X., Yang X., Li Y., Et al., Research on control indices and deformation characteristic of shallow tunnel with weak interlayer, Chinese Journal of Rock Mechanics and Engineering, 33, pp. 2685-2691, (2014)
  • [10] Xia Y., Wang W., Hu Q., A study on the effect of the rate of stress relieving of surrounding-rocks on the construction of a double arch tunnel, Modern Tunnelling Technology, 42, 3, pp. 1-4, (2005)
12