Abstract
The saline soil roadbed in the cold region is affected by salt crystallization and migration, and the soil strength parameters change significantly. In order to determine the influence of salt migration on the stability of the roadbed under the conditions of laying gravel barriers of different thickness in the saline soil roadbed in cold regions. First, determine the type and physical parameters of saline soil in cold regions. Secondly, for the saline soil roadbed with different thickness of gravel partition in the base of the road, the slope software is used to analyze the stability of the subgrade slope, and the stability of the gravel partition is obtained. The effect of slope stability. The results show that when the gravel partition layer is set at the base of the road, the overall stability of the subgrade slope decreases with the increase of the thickness of the partition. When the thickness of the partition is more than 20cm, the dangerous sliding surface is transferred to the surface of the slope partition. The thickness of the partition layer increases, and the dangerous sliding surface remains stable, which provides reference data for the design of the saline soil roadbed in the cold region.
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