Study on deformation characteristics of permafrost roadbed considering the influence of temperature field

• Published in: IOP Conference Series: Materials Science and Engineering
• Main Authors: Li, Bin, Liu, Zhao
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2020
• Subjects: permafrost
• Online Access: http://dx.doi.org/10.1088/1757-899x/780/4/042029; https://iopscience.iop.org/article/10.1088/1757-899X/780/4/042029/pdf; https://iopscience.iop.org/article/10.1088/1757-899X/780/4/042029

Abstract Taking ha-da railway passenger line as the research object, the temperature field of the subgrade in frozen soil area is simulated by numerical calculation method, and the influencing factors and distribution of the temperature field of the permafrost subgrade are analysed. Finally, the following results are obtained: with the increase of climate warming temperature, the temperature field in the roadbed changes slowly, and the temperature at different depths increases. When the maximum freezing depth appeared after 20 years, the roadbed was in full positive temperature due to the influence of climate warming. The settlement of roadbed after construction under the action of temperature field and force field does not exceed 15mm, which meets the requirements of the code.