%0 Journal Article
%T 经时视角下山岭隧道水害冻害若干问题的实证研究<br>Empirical researches on time-varying characteristic of water and frozen disease in mountain tunnel
%A 张镇国
%A 伍毅敏
%A 张庆宁&lt
%A br&gt
%A ZHANG Zhenguo
%A WU Yimin
%A ZHANG Qingning
%J 铁道科学与工程学报
%D 2016
%X 针对防水防冻技术措施的实际工作状态,采取实验方法对其中几个关键问题进行研究,结果表明:受压状态下复合防水层土工布的横向导水性能很低,并会逐年淤塞丧失功能,各类排水管的外包土工布和滤水层也存在明显的淤塞问题,这一现象导致了隧道排水系统逐步失效,形成并加剧隧道渗漏;冬季寒区隧道洞口段和洞身段衬砌的平均温度差异不大,温度振幅和正负温交替次数差异显著,短周期冻融循环的累积损伤才是引起隧道衬砌冻害的根本原因,而不是负温冻结本身;对于寒区隧道层间聚氨酯保温板,考虑初支二衬的相互挤压、防水板破损导致浸水以及多频次短周期冻融循环作用,其内部结构破坏和热力学性能劣化将逐年发展,威胁结构长期安全。上述实证结论值得引起隧道水害冻害研究和设计者重视,可为进一步的量化研究提供参考。<br>Based on actual working state of waterproof and anti-freezing measures, this paper studies several key issues with experiment methods. Results show that: Geotextile in composite waterproof layer whose radial hydraulic conductivity is very small under the compression state, and it will get blocked year by year until the loss of its function. In addition, obvious blocking problems also exist in out wrapped geotextile and filtering layers of varied drainage pipes. This phenomenon leads to progressive failure of tunnel drainage system, as well as formation and intensifying of tunnel leakage. In winter, average temperature has little difference in the external and the internal part of tunnel, while the difference of temperature amplitude and alternation frequency between positive and negative temperature is obvious. Cumulative damage of freezing and thawing cycle with short period is the primary cause of tunnel lining''''s freezing damage, rather than freeze itself under negative temperature. For the polyurethane sandwich panel installed at interlayer of cold region tunnel, its internal structure damage and thermodynamic performance degradation will develop year by year taking extrusion between initial and second lining, seepage induced by waterproof board damage and frequent freezing and thawing cycle with short period into account, which threats structure''''s long-term security. The above conclusions should be brought to researcher and designer who focus on water and freezing disease of tunnel and can also provide a reference for further quantitative research
%K 隧道工程
%K 防水防冻
%K 经时特征
%K 实证研究&lt
%K br&gt
%K tunnel engineering
%K water and frozen disease
%K time-varying characteristic
%K empirical research
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_311836