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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覆盖作用下非饱和道路系统冻胀多物理场模拟

覆盖作用下道路系统的冻胀涉及水、热、气的耦合输运以及水、汽、冰的动态相变，是一个复杂的多物理场耦合过程。提出了一种多物理场数值模型来研究寒冷地区道路系统的冻胀过程。该模型既考虑了路面覆盖效应和道路的多层结构，又反映了系统所涉及的多场耦合和多相转变。通过与详实的样本实验结果对比，对模型进行验证，简化了道路系统计算轮廓模型的初始条件和边界条件。在多场耦合分析的基础上，进行参数化分析，探讨不同路基参数对覆盖效果的影响。特别注意了初始含水量、温度梯度、冷却速率和填料密实度对冻胀过程的影响。结果表明，蒸汽的迁移和相变影响着道路系统的冻结过程。在冻结过程的稳定阶段，路面顶部的水分含量大大超过初始水平，这是一种由蒸汽迁移驱动的现象。这种多物理场模拟对研究寒冷地区道路系统冻胀机理具有一定的指导意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.