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

Advances in Climate Change Research

Jing-Yi Zhao¹  Ji Chen²  Xin Hou²  Jia-Wei Gao²  Qi-Hang Mei³  Hai-Ming Dang³  Jin-Chang Wang³  Shou-Hong Zhang⁴ 

[1] Corresponding author. 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.;University of Chinese Academy of Sciences, Beijing, 100049, China;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;China Railway Qinghai-Tibet Group Co. Ltd, Xining, 810007, China;

关键词: Climate warming;    Permafrost;    Crushed rock revetment (CRR);    Thermosyphons;    Settlement;   

DOI  :  

来源: DOAJ

【 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.

【 授权许可】

Unknown