Analysis of the influence of bedding modified filler and insulation slope protection on temperature field of roadbed in seasonally frozen soil regions

High speed railway requires a high level of ride comfort, the construction of railway facing the problem of subgrade frost heaving in the seasonally frozen soil regions. The deformation of track caused by subgrade frost heaving has seriously affected the safety and comfort of high-speed railway. In this paper, a method for the prevention and treatment of subgrade frost heaving is presented, which uses the cement stabilized grading crushed stones instead of ordinary graded crushed stones as filler in surface layer of subgrade bed and lays insulation slope protection in roadbed side slope, by comparing with other scholars on the subgrade frost heaving prevention and treatment methods. According to the geologic and climate conditions of the seasonally frozen soil regions along the Harbin-Qiqihar Dedicated Passenger Line, using the finite element numerical simulation method to analyze the influence on temperature field of roadbed after laying cement stabilized grading crushed stones in the surface layer of subgra