Strengthening effect of crushed rock revetment and thermosyphons in a traditional embankment in permafrost regions under warming climate  

作　　者：MEI Qi-Hang CHEN Ji WANG Jin-Chang HOU Xin ZHAO Jing-Yi ZHANG Shou-Hong DANG Hai-Ming GAO Jia-Wei 

机构地区：[1]Beiluhe Observation and Research Station of Frozen Soil Engineering and Environment,State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environmental and Resources,Chinese Academy of Sciences,Lanzhou,730000,China [2]University of Chinese Academy of Sciences,Beijing,100049,China [3]China Railway Qinghai-libet Group Co.Ltd,Xining,810007,China

出　　处：《Advances in Climate Change Research》2021年第1期66-75,共10页气候变化研究进展（英文版）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Science(XDA20020102);Science and Technology Project of State Grid Corporation of China(SGQHDKYOSBJS201600077);the Natural Science Foundation of China(41101065);the State Key Laboratory of Frozen Soils Engineering Foundation(SKLFSE-ZT-34).

摘　　要：The embankment of the Qinghai-Tibet Railway(QTR)has been experiencing severe problems due to permafrost degradation,especially in warm and ice-rich permafrost regions.Based on ground temperature and deformation data of the embankment at location K1497+150 of the QTR in 2006-2018,the thermal regime and deformation process were analysed.The results showed that 1)the degradation rate of permafrost under the embankment was faster than that under the natural site without engineering construction,and 2)the deformation rate of the embankment had exceeded the safety range for the QTR embankment before adopting mitigative measures.In addition,this study evaluated the cooling effect on the underlying permafrost and working mechanism of two strengthening measures.Two measures,crushed rock revetment(CRR)and thermosyphons,were adopted to protect the underlying permafrost from continual degradation.The individual cooling effect of the CRR was not as good as that of the thermosyphons.However,the combination of the two could enhance the protective effects of each on the underlying permafrost,effectively cooling the permafrost and improving the stability of the embankment.

关 键 词：Climate warming PERMAFROST Crushed rock revetment(CRR) Thermosyphons SETTLEMENT 

分 类 号：U21[交通运输工程—道路与铁道工程]