The Numerical Simulation of the Lateral Inhomogeneous Deformation of the Permafrost Subgrade

Abstract:

The Qinghai-Tibet highway subgrade inhomogeneous deformation is very serious because of the bad climate environment and the special engineering condition of permafrost. To reveal the mechanism of subgrade diseases, based on the theory of elastic-plastic deformation, the control equation of the stress and deformation field of the subgrade is established. We analyze subgrade stress and deformation field by finite element software. Considering effect of the southern and northern slopes, the model of the inhomogeneous deformation of the subgrade was established. Then we calculated the variation characteristic of the lateral inhomogeneous deformation under different melting depth. The results showed that the melting interlayer, melting depth and the effect of southern and northern slopes were the key factors influencing the permafrost subgrade lateral inhomogeneous deformation.

• Periodical: Advanced Materials Research (Volumes 945-949)
• Pages: 198-202
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.945-949.198
• Online since: June 2014
• Authors: Yu Shuo Fan*, Xue Song Mao, Qing Meng Meng, Bin Bin Luo
• Keywords: Inhomogeneous Deformation, Numerical Simulation, Permafrost, Subgrade

References

[1] MAO Xuesong, LI Ning, WANG Binggang, et al. Coupling model and numerical simulation of moisture-heat-stress fields in permafrost embankment[J]. Journal of Chang'an University (Natural Science), 2006, 26(4): 16–19, 62. (In Chinese).

[2] MAO Xuesong, LING Side, ZHANG Zhengbo, et al. Analysis the Influence of Hydrops along the Subgrade to Qinghai tibet Highway Subgrade Strength [J]. Journal of Wuhan University of Technology (Transportation Science-Engineering), 2013, 37(3): 456-459. (In Chinese).

[3] XIAO Lou, Dong Dehui. Analysis of Subgrade Deformation Characteristics in Circumpolar Latitude Permafrost Regions along Mohe-Beijcun Highway [J]. Highway, 2012(7): 11-17. (In Chinese).

DOI: 10.1109/rsete.2011.5964642

[4] SUN Zhizhong, MA Wei, DANG Haiming, et al. Characteristics and causes of embankment deformation for Qinghai-Tibet Railway in permafrost regions [J]. Rock and Soil Mechanics, 2013, 34(9): 2667-2671. (In Chinese).

[5] Li Ning, Xu Bin, Chen Feixiong. Coupling analysis of temperature, deformation and stress field for frozen soil subgrade [J]. China Journal of Highway and Transport, 2006, 19(3): 1-7. (In Chinese).

[6] Man Gaofeng, Liu Jiankun. Numerical analysis of the formation mechanism of embankment longitudinal cracks in permafrost region [J]. Railway Engineering, 2007(5): 51-54. (In Chinese).

[7] Xu Xuezu, Wang Jiacheng, Zhang Lixin. Frozen soil mechanics [M]. Beijing: Science press. 2001. (In Chinese).

[8] Guo Kuanliang. Computational heat transfer [M]. Hefei: China Social Sciences Press. 1998. (In Chinese).