摘要
面对全球变暖与工程活动导致国内首条穿越高纬度岛状多年冻土区的高速铁路——铁伊高铁沿线冻土退化引发的工程挑战,研究针对现场原状岛状多年冻土试样,开展热物理参数测试试验。研究结果表明,随着试样温度降低,导热系数快速升高,最终趋于稳定;试样在融化过程的导热系数大于冻结过程;腐殖质土导热系数最大,粉质黏土导热系数最小。研究结论可为铁伊高铁建设与运营奠定科学基础。
In response to the engineering challenges posed by permafrost degradation along the Tieyi high-speed railway—the first high-speed rail line in China to traverse high-latitude island-like permafrost zones—this study conducts thermal property tests on in-situ island permafrost samples.The results indicate that the thermal conductiv⁃ity increases rapidly as the sample temperature decreases,eventually stabilizing.Additionally,thermal conductivity during the thawing process is higher than during the freezing process.Among the tested soils,humus soil exhibits the highest thermal conductivity,while silty clay has the lowest.The findings provide a scientific basis for the con⁃struction and operation of the Tieyi high-speed railway.
作者
姚福超
贾连金
凌贤长
颜刚
王柯
YAO Fuchao;JIA Lianjin;LING Xianzhang;YAN Gang;WANG Ke(Heilongjiang Railway Development Group Co.,Ltd.,Harbin 150090,China;China Railway Construction Group Co.,Ltd.,Beijing 100040,China;Harbin Institute of Technology,Harbin 150090,China)
出处
《低温建筑技术》
2025年第8期30-33,共4页
Low Temperature Architecture Technology
基金
国家重点研发计划项目(2022YFB2302802)
西藏自治区科技重大专项(XZ202402ZD0008)
中铁建设集团有限公司华北分公司委托项目(4434QT2023003)。
关键词
铁伊高铁
岛状多年冻土
导热系数
高温冻土
Tieyi high-speed railway
island permafrost
thermal conductivity
warm permafrost
