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《Journal of Glaciology and Geocryology》 2018-02
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Research progress of piles' thermostability in cold regions

CHEN Hui;ZHANG Ze;FENG Wenjie;SHI Xiangyang;MING Jiao;DU Yuxia;School of Civil Engineering and Mechanics,Lanzhou University;State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences;  
Due to a plenty of advantages,such as long anchorage length,deep burial,insensitivity to the changeable geothermal field and fast-refreezing,piles have been widely used in permafrost regions on the Tibetan Plateau. The study of piles' thermostability is always a comprehensive problem and it refers to many aspects,for instance,heat transfer theory,geocryology,design of piles,pile-soil interaction and so on. Based on lots of academic papers,the research progress of piles' thermostability by field and model tests and theorical calculation are summarized and analyzed in this paper. The following conclusions can be drawn: the soil refreezing procedure is affected by a lot of aspects,among which concrete hydration heat is the most significant; with the global warming,permafrost degradation will aggravate apparently on the Tibetan Plateau in the next 50 years,which threatens the piles' thermostability and corresponding protection measures need to be taken.
【Fund】: 中国科学院“西部之光”博士项目(张泽);; 国家自然科学基金项目(41771078);; 青海省交通科学研究院开放基金项目(2016-01-04)资助
【CateGory Index】: TU473.1
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