Research Advances and Prospect of Scale Effect Theory of Permafrost Roadbed
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摘要: 多年冻土与路基工程之间复杂的水热力相互作用表现出显著的尺度效应,空间尺度、时间尺度和结构性态等都会对其产生影响。对冻土路基尺度效应的深入认识是揭示大尺度冻土路基热融风险机理、融沉防控的重要理论基础。近几十年来,基于室内外试验和数值分析等方法,冻土路基尺度效应研究从现象到机理,最终形成了理论体系,取得充分发展。文章总结了冻土路基尺度效应理论体系、研究方法,梳理了近年来在上边界条件、空间效应、时间效应和结构效应等方面的研究进展,并在此基础上对今后的研究重点提出了一些构想。Abstract: The complex hydrological-, thermal-mechanical interactions between permafrost and roadbed engineering exhibit significant scale effects, which are influenced by spatial scale, temporal scale, and structural state. The in-depth understanding of the scale effects of permafrost roadbed is an important theoretical basis for revealing the thawing risk mechanism of large-scale permafrost roadbed and preventing thawing settlement. In recent decades, based on methods such as laboratory and field experiments and numerical analysis, the study of scale effects on permafrost roadbeds has evolved from phenomena to mechanisms, ultimately forming a theoretical system and achieving full development. The theoretical system and research methods of the scale effects of permafrost roadbed were summarized, and the research advances in recent years in terms of upper boundary conditions, spatial effects, time effects, and structural effects were reviewed. Based on this, some ideas were proposed for future research priorities.
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Key words:
- permafrost /
- scale effect /
- roadbed engineering /
- research advance
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