Multiphysics simulation of frost heave in unsaturated road systems under covering effect

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL Transportation Geotechnics Pub Date : 2025-02-19 DOI:10.1016/j.trgeo.2025.101526

Lin Li , Zepeng Zhang , Weiling Zu , Panpan Li , Weibing Gong

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引用次数: 0

Abstract

The frost heave of road systems under the covering effect involves the coupled transport of water, heat, and gas, along with the dynamic phase transition of water, vapor, and ice, resulting in a complex multi-physical field coupling process. This study presents a multi-physics numerical model to investigate the frost heave process of road systems in cold regions. The model not only considers the pavement covering effect and the multi-layered structure of the road, but also represents the multi-field coupling and multiphase transitions involved in the system. The model validation is conducted by comparing it with experimental results from a well-documented sample experiment, which simplifies the initial and boundary conditions of the road system calculation profile model. Following the multi-field coupling analysis, a parametric analysis is conducted to explore the impact of different roadbed parameters on the covering effect. Special attention is given to the effects of initial moisture content, temperature gradient, cooling rate, and compactness of fillers on the frost heave process. The results show that the migration and phase transition of vapor impact the freezing process of road systems. In the stable phase of the freeze process, the moisture content at the top of the road substantially exceeds the initial level, a phenomenon driven by vapor migration. This multi-physics simulation can potentially serve as a guidance for studying the frost heave mechanism of road systems in cold regions.

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来源期刊

Transportation Geotechnics Social Sciences-Transportation

CiteScore

8.10

自引率

11.30%

发文量

194

审稿时长

51 days

期刊介绍： Transportation Geotechnics is a journal dedicated to publishing high-quality, theoretical, and applied papers that cover all facets of geotechnics for transportation infrastructure such as roads, highways, railways, underground railways, airfields, and waterways. The journal places a special emphasis on case studies that present original work relevant to the sustainable construction of transportation infrastructure. The scope of topics it addresses includes the geotechnical properties of geomaterials for sustainable and rational design and construction, the behavior of compacted and stabilized geomaterials, the use of geosynthetics and reinforcement in constructed layers and interlayers, ground improvement and slope stability for transportation infrastructures, compaction technology and management, maintenance technology, the impact of climate, embankments for highways and high-speed trains, transition zones, dredging, underwater geotechnics for infrastructure purposes, and the modeling of multi-layered structures and supporting ground under dynamic and repeated loads.