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Sciences in Cold and Arid Regions ›› 2015, Vol. 7 ›› Issue (4): 370–375.doi: 10.3724/SP.J.1226.2015.00370

• ARTICLES • 上一篇    

Monitoring and analysis of ground temperature and deformation within Qinghai-Tibet Highway subgradein permafrost region

YaHu Tian1,2, YuPeng Shen1, WenBing Yu3, JianHong Fang2   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
    2. Qinghai Research Institute of Transportation, Xining, Qinghai 810008, China;
    3. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
  • 收稿日期:2015-02-21 修回日期:2015-04-21 发布日期:2018-11-23
  • 通讯作者: Ph.D.,YaHu Tian, School of Civil Engineering, Beijing Jiaotong University, No. 3, Shangyuan Cun, Haidian District, Beijing 100044, China. Tel: +86-10-51684077; E-mail: yhtian@bjtu.edu.cn E-mail:yhtian@bjtu.edu.cn
  • 基金资助:
    The authors wish to acknowledge the support provided by the National Natural Science Foundation of China (No. 41271072), the national 973 Project of China (No. 2012CB026104), the Fundamental Research Funds for the Central Universities (No. 2011JBZ009), and Open Fund of the Qinghai Research Institute of Transportation (No. 20121208).

Monitoring and analysis of ground temperature and deformation within Qinghai-Tibet Highway subgradein permafrost region

YaHu Tian1,2, YuPeng Shen1, WenBing Yu3, JianHong Fang2   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
    2. Qinghai Research Institute of Transportation, Xining, Qinghai 810008, China;
    3. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
  • Received:2015-02-21 Revised:2015-04-21 Published:2018-11-23
  • Contact: Ph.D.,YaHu Tian, School of Civil Engineering, Beijing Jiaotong University, No. 3, Shangyuan Cun, Haidian District, Beijing 100044, China. Tel: +86-10-51684077; E-mail: yhtian@bjtu.edu.cn E-mail:yhtian@bjtu.edu.cn
  • Supported by:
    The authors wish to acknowledge the support provided by the National Natural Science Foundation of China (No. 41271072), the national 973 Project of China (No. 2012CB026104), the Fundamental Research Funds for the Central Universities (No. 2011JBZ009), and Open Fund of the Qinghai Research Institute of Transportation (No. 20121208).

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摘要： In order to study the stability of the Qinghai-Tibet Highway embankment at Chumaerhe in the permafrost region of northwest China, the ground temperature and deformation at different depths were monitored under the left and right shoulders of the embankment where thermosyphons were set up only on the left shoulder. Based on the monitored data, characteristics of ground temperature and deformation of the left and right shoulders are analyzed and discussed. The results show that the start time of freezing or thawing of the seasonal active layer was about one to two months later than that of the embankment body itself. The stability of each shoulder was mainly controlled by the settlement of different soil layers,whereasfrost heave of soil had scarcely any effect on the stability of the embankment. For the left shoulder, the settlement was mainly influenced by the seasonal active layer and then by the embankment body itself,due to freeze-thaw cycles which may change the soil properties; however, the permafrost layer remained fairly stable. For the right shoulder, creep of the warm permafrost layer was the main influence factor on its stability, followed by settlement of embankment body itself, and finally settlement of the seasonal active layer. Compared with the deformation of the left shoulder, the permafrost layer under the right shoulder was less stable, which indicates that the thermosyphons had a significantly positive effect on the stability of warm permafrost.

关键词: Qinghai-Tibet Highway, permafrost, deformation, ground temperature, monitoring

Abstract: In order to study the stability of the Qinghai-Tibet Highway embankment at Chumaerhe in the permafrost region of northwest China, the ground temperature and deformation at different depths were monitored under the left and right shoulders of the embankment where thermosyphons were set up only on the left shoulder. Based on the monitored data, characteristics of ground temperature and deformation of the left and right shoulders are analyzed and discussed. The results show that the start time of freezing or thawing of the seasonal active layer was about one to two months later than that of the embankment body itself. The stability of each shoulder was mainly controlled by the settlement of different soil layers,whereasfrost heave of soil had scarcely any effect on the stability of the embankment. For the left shoulder, the settlement was mainly influenced by the seasonal active layer and then by the embankment body itself,due to freeze-thaw cycles which may change the soil properties; however, the permafrost layer remained fairly stable. For the right shoulder, creep of the warm permafrost layer was the main influence factor on its stability, followed by settlement of embankment body itself, and finally settlement of the seasonal active layer. Compared with the deformation of the left shoulder, the permafrost layer under the right shoulder was less stable, which indicates that the thermosyphons had a significantly positive effect on the stability of warm permafrost.

Key words: Qinghai-Tibet Highway, permafrost, deformation, ground temperature, monitoring

Chen XB, LiuJK, Liu HX, et al., 2006. Frost Action of Soil and Foundation Engineering. Beijing: Science Press, pp.13-17.
He P, Cheng GD, Yang CS, et al., 2003. The evaluation of thawing settlement coefficient of frozen soils. Journal of Glaciology and Geocryology, 25(6): 608-613.
Liang B, Zhang GS, Liu DR, 2006. Experimental study on thawing subsidence characters of permafrost under frost heaving and thawing circulation. Chinese Journal of Geotechnical Engineering, 28(10): 1213-1217.
Liu YZ, Wu QB, Zhang JM, et al., 2002. Deformation of highway roadbed in permafrost regions of the Tibetan Plateau. Journal of Glaciology and Geocryology, 24(1): 10-15.
Ma W, Liu D, Wu QB, 2008. Monitoring and analysis of embankment deformation in permafrost regions of Qinghai-Tibet Railway. Journal of Rock and Soil Mechanics, 29(3): 571-579.
Qi JL,Zhang JM, Yao XL, et al., 2009. Analysis of settlement of constructions in permafrost regions. Journal of Rock and Soil Mechanics, 30(Suppl.2): 1-8.
Wang SJ, 2005. Study on highway subgrade stabilization and prediction technique in plateau permafrost region. Ph.D. Dissertation, School of Communication and Transportion, Southeast University, Nanjing, China, pp.14-26.
Yu F, Qi JL,Yao XL, 2011. Monitoring settlement at different depths within an embankment in permafrost region. Journal of Glaciology and Geocryology, 33(4): 813-818.
Zang EM, Wu ZW, 1999. The Degradation of Permafrost and Highway Engineering. Lanzhou, China: Lanzhou University Press, pp.88-104.
Zhang JM, Liu D, Qi JL, 2007. Estimation on the settlement and deformation of embankment along Qinghai-Tibet Railway in permafrost regions. Journal of China Railway Science, 28(3): 12-17.
Zhu YL, Zhang JY, 1982. Elastic and compressive deformation of frozen soils. Journal of Glaciology and Geocryology, 4(3): 29-40.
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