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Abstract

This paper built a finite element model of the highway widening project on the soft soil foundation by employing Abaqus, and simulated the working conditions of the subgrade and foundation 15 years after the start of construction and completion. By comparing methods such as no reinforcement, pile foundation reinforcement, geogrid reinforcement, and combined reinforcement, the problems such as post-construction sedimentation, geogrid tensile force, and stability safety factor of subgrade were analyzed. The calculation results show that the combined action of piles and geogrids is better than the sum of the individual action of the two disposal methods. The combined reinforcement method can significantly change the stress distribution of the subgrade soil, reduce the uneven sedimentation of the subgrade, and increase the overall integrity and stability of the widened subgrade. The obtained geogrid tensile force is consistent with the actual project, indicating the rationality of the simulation.

Publication Date

11-8-2022

DOI

10.14048/j.issn.1671-2579.2022.05.007

First Page

38

Last Page

43

Submission Date

April 2025

Reference

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