|
|
|
| A MODEL TEST STUDY ON FROST HEAVING PRESSURES
ON TUNNEL LINING IN COLD REGION |
| QU Mengfei1，XIE Qiang1，HU Yi2，Li Zhaoyang1 |
(1. Faculty of Geosciences and Environmental Engineering of Southwest Jiaotong University，Sichuan Chengdu 610031，China；
2. China Southwest Geotechnical Investigation and Design Institute Co.，Ltd，Sichuan Chengdu 610081，China) |
|
|
|
|
Abstract A model test was performed on distribution form of frost heaving of tunnel lining in laboratory. The surrounding rock(slate) of the tunnel was considered as fissured medium，so the frost heaving caused by water migration in fissures was mainly studied. In the model，the fissures were realized by laying seepy fabric among surrounding rock，and the low temperature condition was realized by putting refrigeration equipment in tunnel. The temperature and strain changes were measured by resistance thermometer elements and strain gages，respectively. The laboratory test results prove that the deformations in inverted arch and near the foot of inverted arch are smaller，in arch，arch spring and side wall are larger，the largest is in side wall. For further studying the distribution forms，the numerical simulation method was applied for analyzing frost heaving force calculated by different frost model. Compared the numerical simulation results with the converted laboratory model test results，the frost model of frost heaving force produced by the water-contained weathered rock layer was selected. That is，the frost heaving force is lateral and level acting on side wall of the tunnel lining，0.9 MPa in entrance and 0.6 MPa in tunnel trunk.
|
|
|
|
|
|
| [1] 张德华，王梦恕，谭忠盛，等. 风火山隧道围岩冻胀对支护结构体系的影响[J]. 岩土工程学报，2003，25(5)：571–573.(ZhANG Dehua，WANG Mengshu，TAN Zhongsheng，et al. Effect of frost heaving on tunnel supporting systems of Fenghuoshan Railway tunnel[J]. Chinese Journal of Geotechnical Engineering，2003，25(5)：571–573.(in Chinese))
[2] 赖远明，吴紫汪，朱元林，等. 寒区隧道冻胀力的黏弹性解析解[J]. 铁道学报，1999，21(6)：70–74. (LAI Yuanming，WU Ziwang，ZHU Yuanlin，et al. Analytical Viscoelastic Solution for Frost Force of Cold Regional Tunnels[J]. Journal of the China Railway Society，1999，21(6)：70–74.(in Chinese))
[3] 杨更社，张全胜. 隧道围岩冻胀力的解析计算分析[C]// 中国岩石力学与工程学会第七次学术大会论文集，2002：489–491.
[4] 王建宇，胡元芳. 隧道衬砌冻胀压力问题研究[J]. 冰川冻土报，2004，26(1)：112–119.(WANG Jianyu，HU Yuanfang. A discussion on Frost-Heaving Force on Tunnel Lining[J]. Journal of Glaciology and Geocryology，2004，26(1)：112–119.(in Chinese))
[5] 范 磊，曾艳华，何 川，等. 寒区硬岩隧道冻胀力的量值及分布规律[J]. 中国铁道科学，2007，28(1)：44–49.(FAN lei，ZENG Yanhua，HE Chuan，et al. Magnitude and distribution of frost heave force for cold region strong rock tunnels[J]. China Railway Science，2007，28(1)：44–49.(in Chinese))
[6] 张祉道，王 联. 高海拔及严寒地区隧道防冻设计探讨[J]. 现代隧道技术，2004，41(3)：1–6.(ZHANG Zhidao，WANG Lian. Discussion on the design of tunnel in high elevation and bitter cold region[J]. Modern Tunneling Technology，2004，41(3)：1–6.(in Chinese))
[7] 谭贤君，陈卫忠，伍国军，等. 低温冻融条件下岩体温度–渗流–应力–损伤(THMD)耦合模型研究及其在寒区隧道中的应用[J]. 岩石力学与工程学报，2013，32(2)：239–250.(TAN XianJun，CHEN Weizhong，WU Guo，et al. Study of the thermo-hydro-mechanical-damage (THMD) coupled model in the condition of freeze-thaw cycles and its application to cold region tunnels[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(2)：239–250.(in Chinese))
[8] 刘泉声，康永水，刘 滨，等. 裂隙岩体水–冰相变及低温温度场–渗流场–应力场耦合研究[J]. 岩石力学与工程学报，2011，30(11)：2 181–2 188.(LIU Quansheng，KANG Yongshui，LIU Bing，et al. Water-ice phase transition and thermo-hydro-mechanical coupling at low temperature in fractured rock[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(11)：2 181–2 188.(in Chinese))
[9] 康永水，刘泉声，赵 军，等. 岩石冻胀变形特征及寒区隧道冻胀变形模拟[J]. 岩石力学与工程学报，2012，31(12)：2 518–2 526. (KANG Yongshui，LIU Quansheng，ZHAO Jun，et al. Eesearch on frost deformation characteristics of rock and simulation of tunnel frost deformation in cold region[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(12)：2 518–2 526.(in Chinese))
[10] 夏才初，黄继辉，韩常领，等. 寒区隧道岩体冻胀率的取值方法和冻胀敏感性分级[J]. 岩石力学与工程学报，2013，32(9)：1 876–1 885. (XIA Caichu，HUANG Jihui，HANG Changling，et al. Methods of frost-heave ratio evaluation and classification of frost-heave susceptibility of tunnel surrounding rocks in cold regions[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(9)：1 876–1 885.(in Chinese))
[11] 仇文革，孙 兵. 寒区破碎岩体隧道冻胀力室内对比试验研究[J].冰川冻土，2010，32(3)：557–561.(QIU Wenge，SUN Bing. Model test study of frost heaving pressures in tunnels excavated in fractured rock mass in cold regions[J]. Journal of Glaciology and Geocryology，2010，32(3)：557–561.(in Chinese)) |
|
|
|
2015, Vol. 34 
