寒区隧道衬砌智能保温技术研究
摘要：长期的工程实践表明,寒冷的气候条件可能导致隧道衬砌出现不同程度的冻害,如衬砌开裂乃至剥落等。隧道衬砌发生冻害后,不仅会导致其承载力下降,而且会给通行车辆带来不确定性。另外,在冬季会出现裂隙渗水、拱顶挂冰和路面湿滑成冰等现象,给隧道结构的安全服役带来很大不确定性因素。基于此,设计了一种自适应智能保温技术方案,以求解决这一问题。同时,拟通过数值模拟和现场测试,验证该方案的有效性和可靠性。研究结果显示,该方案能显著改善隧道衬砌的热力学条件,抑制冻害发生。
关键词：隧道工程衬砌抗冻数值模拟测试
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参考文献[1] LIU Hongyan ,YUAN Xiaoping ,XIE Tiancheng.A damage model for frost heaving pressure in circular rock tunnel under freezing-thawing cycles[J].Tunnelling and underground space technology,2019,83:401-408.
[2] ZHAO Xin,YANG Xiaohua,ZHANG Hongwei,et al.An analytical solution for frost heave force by the multifactor of coupled heat and moisture transfer in cold-region tunnels[J].Cold regions science and technology,2020,175:103077.
[3] LUO Yanbin,CHEN Jianxun.Research status and progress of tunnel frost damage[J].Journal of traffic and transportation engineering (english edition),2019,6 (3):297-309.
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[8] 夏才初,范东方,韩常领.寒区隧道不同类型冻土段隔热(保温)层铺设厚度计算方法[J].中国公路学报,2013,26(5):131-139.
[9] 谭贤君,陈卫忠,于洪丹,等.考虑通风影响的寒区隧道围岩温度场及防寒保温材料敷设长度研究[J].岩石力学与工程学报,2013,32(7):1400-1409.
[10] 晏启祥,何川,曾东洋.寒区隧道温度场及保温隔热层研究[J].四川大学学报(工程科学版),2005,37(3):24-27.
[2] ZHAO Xin,YANG Xiaohua,ZHANG Hongwei,et al.An analytical solution for frost heave force by the multifactor of coupled heat and moisture transfer in cold-region tunnels[J].Cold regions science and technology,2020,175:103077.
[3] LUO Yanbin,CHEN Jianxun.Research status and progress of tunnel frost damage[J].Journal of traffic and transportation engineering (english edition),2019,6 (3):297-309.
[4] ZHAO Xin,ZHANG Hongwei,LAI Hongpeng,et al.Temperature field characteristics and influencing factors on frost depth of a highway tunnel in a cold region[J].Cold regions science and technology,2020,179:103141.
[5] 刘红岩,赵雨霞.冻融循环下隧道围岩冻胀力理论计算[J].中南大学学报(自然科学版),2020,51(4):1049-1058.
[6] 黄双林,苏新民.隔热保温技术在多年冻土隧道中的应用[J].冰川冻土,2003,25(S1):104-107.
[7] 赖远明,吴紫汪,张淑娟,等.寒区隧道保温效果的现场观察研究[J].铁道学报,2003,25(1):81-86.
[8] 夏才初,范东方,韩常领.寒区隧道不同类型冻土段隔热(保温)层铺设厚度计算方法[J].中国公路学报,2013,26(5):131-139.
[9] 谭贤君,陈卫忠,于洪丹,等.考虑通风影响的寒区隧道围岩温度场及防寒保温材料敷设长度研究[J].岩石力学与工程学报,2013,32(7):1400-1409.
[10] 晏启祥,何川,曾东洋.寒区隧道温度场及保温隔热层研究[J].四川大学学报(工程科学版),2005,37(3):24-27.
Study on Intelligent Insulation Technology for Tunnel Lining in Cold Areas
Abstract: Long-term engineering practice shows that cold weather conditions can result in different degrees of frost damage in tunnel linings, such as cracking or even peeling off. After frost damage occurs in the tunnel lining, it will not only reduce the bearing capacity of the lining, but also bring great uncertainty to traffic vehicles due to cracks seepage, hanging ice from the vault and slippery road surface. Therefore, an adaptive intelligent insulation technology is presented to solve the problem in this paper. Moreover, the effectiveness and reliability of the scheme are also verified through numerical simulation and field testing. The results show that the scheme can significantly improve the thermodynamic conditions of the tunnel lining and inhibit the occurrence of frost damage.
Keywords: tunnels; linings; frost resistance; simulation; testing
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