Numerical simulation of creep settlement for high railway foundations based on the UH model considering time effect

Abstract

The high-speed railway has strict restrictions on the settlement of the roadbed, and the settlement value must not exceed 15mm. In the process of calculating the settlement of high-speed railway subgrade, the impact of soil creep should be considered. In the creep calculation, the calculation parameters should have practical physical meaning. Therefore, based on the UH model considering time effect, the secondary development of ABAQUS software is realized, and the finite element simplified model of the high-speed railway in a section near Qufu East Station is established. The creep settlement of the points on the surface of the natural roadbed under the high-speed railway is concave curve of distribution. With the change of time, the creep growth rate of each point becomes slower and slower, and the creep settling curve shows a tendency of gradual flattening.