热棒在根拉公路岛状多年冻土路基工程中的应用研究  

Research of thermosyphon applied in patchy permafrost sections along the Genhe-Labudalin Highway

作　　者：吴金权 辛洋洋 徐文玺 孙田 WU Jingquan;XIN Yangyang;XU Wenxi;SUN Tian(Hailar-Manzhouli Highway Project Construction Administration Branch,Inner Mongolia Highway Transportation Investment Development Co.,Ltd.,Hulunbeir 021000,Inner Mongolia,China;Soupower Group,Nanjing 211112,China;Nanjing Permafrost Engineering Center of Chinese Academy of Sciences,Nanjing 211112 China)

机构地区：[1]内蒙古公路交通投资发展有限公司海满高速公路项目建设管理分公司,内蒙古呼伦贝尔021000 [2]中圣科技(江苏)有限公司,江苏南京211112 [3]中国科学院南京冻土工程中心,江苏南京211112

出　　处：《冰川冻土》2018年第5期943-950,共8页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金重点项目(41630636)资助

摘　　要：热棒技术是国内外寒区工程中广泛使用的主动冷却地基的有效方法和关键技术。针对根河至拉布大林公路独特的气候和岛状多年冻土条件,设计间距4 m热棒来保护多年冻土路基,对比分析直式热棒和L型热棒路基的降温效能,实测结果表明:经过2个冬季工作,热棒降低周边半径2. 5 m范围路基温度平均降温幅度超过4℃,能有效抵御夏季路面传下热量,有效地保护多年冻土上限不下移,热棒间距4 m是合理的;与直式热棒相比,L型热棒能更快散发黑色路面传下的热量,L型热棒对于宽幅路面下部冻土保护具有更好的工程效果。Thermosyphon technology is an effective method and key technology for active cooling ground in cold regions at home and abroad. According to the weather conditions and distribution characteristics of the patchy permafrost along the Genhe-Labudalin Highway,thermosyphons with a space between 4 m were applied to cool the permafrost,and consequently ensure the stability of embankment. In this paper,the cooling effect of the embankment with vertical and L-shaped thermosyphons were evaluated based on monitored ground temperatures.The results showed that the vertical thermosyphon was capable to cool foundation soil within a radius of 2. 5 meters with an average temperature drop more than 4 ℃. Both the vertical and L-shaped thermosyphons can cool the patchy permafrost and lower the active layer,but the L-shaped thermosyphon is better to cool the patchy permafrost in the middle of embankment. Consequently,the L-shaped thermosyphon can provide a much better protection of permafrost foundation under a wide embankment.

关 键 词：岛状多年冻土 根拉公路 热棒 

分 类 号：P642.14[天文地球—工程地质学] U416.1[天文地球—地质矿产勘探]