Dynamic Response and Deformation Characteristics of Urban Loess Subgrade under Vehicle Load

DOI

10.2991/978-94-6463-449-5_63How to use a DOI?

Keywords

loess subgrade; Vehicle loads; Numerical simulation; Dynamic response; Morph features Medium figure classification number: TU416 document identification code: A article number

Abstract

Urban road disasters occur frequently in northwest China.Vehicle dynamic load is an important factor causing pavement cracking, dislocation and subgrade settlement deformation. The long-term dynamic load exerted by vehicles on the subgrade has caused harm to the normal operation of urban roads and the safety of residents ‘ travel. On this basis, this paper uses Abaqus numerical analysis software to establish a 3D solid model of the actual road structure system. The indoor shear strength of the actual roadbed soil is tested, and the dynamic response law and settlement deformation characteristics of the loess subgrade under different moisture content, dry density, and vehicle load conditions are examined. Results show that under the action of vehicle load, the vertical strain and vertical displacement of the loess subgrade have an attenuation trend from shallow to deep. The attenuation rate shows a shallow, fast, deep, and slow change mode. The cumulative settlement deformation of the subgrade loess shows a gradual growth trend with the accumulation of cyclic vibration, demonstrating the phenomenon of large deformation in the early stage and stable development in the later stage. The loess structure of the subgrade will become more dense and the strength will be improved after multiple cycle vibrations. Under the action of vehicle load, the sedimentation deformation of loess subgrade increases with the growth of moisture content and load, and decreases with the growth of dry density. The above phenomenon shows that the water content of the loess roadbed can be controlled to effectively reduce the incidence of road disasters such as roadbed deformation and settlement. The research in this paper can provide a reference for the disaster prevention and mitigation of urban roads in the northwest loess area in the future.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Yipin Liu
PY  - 2024
DA  - 2024/06/30
TI  - Dynamic Response and Deformation Characteristics of Urban Loess Subgrade under Vehicle Load
BT  - Proceedings of the 2024 8th International Conference on Civil Architecture and Structural Engineering (ICCASE 2024)
PB  - Atlantis Press
SP  - 644
EP  - 658
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-449-5_63
DO  - 10.2991/978-94-6463-449-5_63
ID  - Liu2024
ER  -