We have systematically studied the spatial and temporal variation characteristics of deformation and ground temperature based on measuring the values of corresponding data in the Harbin-Dalian high-speed railway roadbed. The regularity and non-uniformity of roadbed deformation distribution were analyzed based on the relationships between its values and structure type, development of freezing depth, roadbed filling, and transverse position. We also compared the difference of freezing conditions at different locations and heat absorption of the roadbed; then we analyzed the differences of freezing depth in four selected roadbed sections and the characteristics of average ground temperature along the vertical direction in the coldest and hottest months. Based on the above analyses, the source of the spatial and temporal characteristics of roadbed deformation, influencing factors, and the potential hazards of transverse thermal difference to roadbed stability have been discussed. The results showed that the distribution of roadbed deformation in seasonal frozen regions had certain regularity, non-uniformity, and randomness. Roadbed freezing processes of roadbed at different transverse locations in different regions were similar. The differences of transverse thermal regime were widespread, and the influence of external temperature on the west shoulder was most obvious. The coldest and warmest month temperatures at a certain depth followed a spindle-shaped trend. Both the increase of latitude and height of roadbed may affect the difference of transverse ground temperatures.
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Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 5, p. 16, September-October, 2020.
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Zhang, Y., Sun, B., Li, P. et al. Analysis of Deformation and Temperature Characteristics of High-Speed Railway Roadbed in Seasonal Frozen Regions. Soil Mech Found Eng 57, 384–393 (2020). https://doi.org/10.1007/s11204-020-09682-z
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DOI: https://doi.org/10.1007/s11204-020-09682-z