文献类型：期刊文献

英文题名：Experimental investigation of the temperature field of a frost-penetration tunnel based on a whole life cycle laboratory test

作者：Lin, Ziliang[1,4];Xia, Caichu[2];Zhou, Shuwei[1,4];Du, Shigui[3]

机构：[1]Tongji Univ, Coll Civil Engn, Dept Geotech Engn, Shanghai 200092, Peoples R China;[2]Ningbo Univ, Sch Civil & Environm Engn, Ningbo 315211, Zhejiang, Peoples R China;[3]Shaoxing Univ, Dept Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[4]Tongji Univ, Key Lab Geotech & Underground Engn, Minist Educ, Shanghai 200092, Peoples R China

年份：2023

卷号：142

外文期刊名：TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:001078394400001)、、EI(收录号：20230194008)、Scopus(收录号：2-s2.0-85170418552)、WOS

基金：Financial support was provided by the National Natural Science Foundation of China (51778475) , the Fundamental Research Funds for the Central Universities of China (22120230152) , the Jilin Provincial Transportation Innovation and Development Support (Science and Technology) (2021-1-5) , and Program of Science and Technology Research and Development of China Railway Group Co., Ltd (2021-Key Project-19) .

语种：英文

外文关键词：Laboratory test model; Negative mean annual air temperature; Temperature field; Frost-penetration tunnel; Whole life cycle

外文摘要：Temperature field evolution plays an essential role in anti-freezing design of frost-penetration tunnels, for which temperature data measured throughout the whole life cycle (100 years) are lacking. The spatial and temporal temperature evolution of a frost-penetration tunnel during the whole life cycle was investigated by using a laboratory test. The test model was designed following some basic fundamental assumptions and similarity principles. The proposed test model was validated using typical cases of the long-term evolution of the temperature fields in cold region tunnels. The evolution features, formation mechanisms and influencing factors were deeply discussed. Experimental results of the model test indicate that a frost-penetration phenomenon occurs in tunnels with positive ground temperature and negative mean annual air temperature. Under negative mean annual air temperature, the freezing circle develops radially towards the surrounding rock and simultaneously develops longitudinally along the tunnel after the tunnel breakthrough. The unfrozen surrounding rock freeze yearly and can develop into permafrost. The primary impact factor of frost penetrations is the positive initial ground temperature and negative mean annual air temperature. The mean annual air temperature has an insignificant effect on the annual temperature amplitude of the surrounding rock, whereas the annual air temperature amplitude has a negligible effect on the mean annual temperature.