寒冷及严寒地区隧道冻害发生机理及防治

发布时间：2018-01-10 17:00

本文关键词：寒冷及严寒地区隧道冻害发生机理及防治　出处：《地下空间与工程学报》2014年S2期 　论文类型：期刊论文

【摘要】：通过对国内外既有隧道冻害产生、发展、演变过程的观察、调查分析,对隧道冻害发生机理及防治问题等进行了研究,研究表明:寒区隧道冻害产生和演变的全过程涉及结构破坏、渗漏水、冻融循环等三大方面因素,并由这三方面因素构成相互影响的冻害环;隧道结构破坏是隧道冻害环的激活因素,包括防水层的破坏和结构衬砌层的破坏;隧道冻害环机理强调控制冻害环激发因素的重要性,提倡采取主动预防措施防止"结冰"现象发生;有效的预防寒区隧道冻害,应从加强基础数据测试、提高隧道衬砌结构抗裂性、积极研发和应用新型隧道防排水措施和主动的、被动的隧道保温技术等几方面入手来进行隧道冻害防治。
[Abstract]:Through the observation, investigation and analysis of the generation, development and evolution of the existing tunnel freezing injury at home and abroad, the mechanism of the tunnel freezing injury and its prevention and treatment are studied. The results show that the whole process of the generation and evolution of tunnel freezing injury in cold region involves three major factors, such as structure damage, water leakage and freeze-thaw cycle, and the three factors constitute the frozen-injury ring which affects each other. Tunnel structure failure is the activation factor of tunnel frost damage ring, including the damage of waterproof layer and structural lining layer. The mechanism of tunnel frozen-injury ring emphasizes the importance of controlling the exciting factors of freezing injury ring, and advocates taking active preventive measures to prevent the phenomenon of "freezing". In order to effectively prevent the freezing injury of tunnel in cold region, we should strengthen the test of basic data, improve the crack resistance of tunnel lining structure, actively develop and apply new tunnel waterproof and drainage measures and take the initiative. Passive tunnel insulation technology and other aspects of the tunnel freezing damage prevention.
【作者单位】：中交隧道局第二工程有限公司;郑州大学交通运输工程系;
【基金】：青海省科学技术厅资助项目(2009-J-148)
【分类号】：U457
【正文快照】： 1引言冻害是寒冷及严寒地区隧道的“顽症”,容易出现,难以根治,且较为普遍,在我国东北和西北地区已经投入运营的寒区公路隧道中,80%以上都存在各种各样的冻害现象[1,2]。同时,冻害问题也是一个世界性难题,以注重科研、积极倡导新技术应用、设计和施工较为规范的日本为例,日本1

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