热半导体材料冷却冻土效果的数值模拟研究  

Numerical Simulation of Cooling Effectof Thermal Semiconductor Materialon Frozen Soil

作　　者：易康宇 张玥[1] 侯鑫 美启航 YI Kangyu;ZHANG Yue;HOU Xin;MEI Qihang(Inner Mongolia University of Science and Technology,Baotou 014010,China;CCCC First Highway Consultants Co.,Ltd,Xi'an 710065,China;State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;Beiluhe Observation and Research Station of Frozen Soil Engineering and Environmentin Qinghai-Tibet Plateau,Northwest Institute of Eco-environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]内蒙古科技大学,内蒙古包头014000 [2]中交第一公路勘察设计研究院有限公司,陕西西安710075 [3]中国科学院西北生态环境资源研究院冻土工程国家重点实验室,甘肃兰州730000 [4]中国科学院大学,北京100049 [5]中国科学院西北生态环境资源研究院青藏高原北麓河冻土工程与环境综合观测研究站,甘肃兰州730000

出　　处：《灾害学》2019年第A01期200-203,212,共5页Journal of Catastrophology

基　　金：国家电网公司科技项目(SGQHDKYOSBJS201600077)

摘　　要：调节热传导是延缓多年冻土退化和保障冻土工程稳定的途径之一。在全球升温的背景下,单纯采用保温措施来提高冻土地基的稳定性是不适宜的。热半导体具有夏季热阻大、冬季热阻小的特点,在多年冻土区具有良好的应用前景。为了解不同因素对热半导体冷却多年冻土效果的影响,该文采用一维模型数值模拟并分析了多年冻土区热半导体覆盖层的温度位移。结果表明,冻融导热系数比愈高、热半导体材料愈厚、较湿润的表土、接近表土冻结温度的年平均地表温度和较大的温度波幅有利于产生较大的温度位移。Regulating heat conduction is one of the ways to delay the degradation of permafrost and ensure the stability of permafrost engineering.Under the background of global warming,it is not appropriate to improve the stability of frozen ground simply by adopting thermal insulation measures.Thermal semiconductors have the characteristics of high thermal resistance in summer and low thermal resistance in winter,and have good application prospects in permafrost regions.In order to understand the influence of different factors on the cooling effect of thermal semiconductor on permafrost,the temperature displacement of thermal semiconductor coating in permafrost region is simulated and analyzed by using one-dimensional model.The results show that the higher the freeze-thaw thermal conductivity ratio,the thicker the thermal semiconductor material,the wetter the surface soil,the annual average surface temperature close to the freezing temperature of the surface soil and the larger temperature amplitude are beneficial to the larger temperature displacement.

关 键 词：多年冻土 热半导体 温度位移 数值试验 

分 类 号：U455.7[建筑科学—桥梁与隧道工程] X43[交通运输工程—道路与铁道工程]