压实雪抗压强度变化规律及烧结机制试验研究

doi:10.11896/cldb.24120101

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Abstract The unconfined compressive strength serves as a crucial index for evaluating the engineering properties of compacted snow. A systematic investigation has been conducted to elucidate the strength change patterns and mechanisms of compacted snow under various influencing factors. The study identifies two primary mechanisms responsible for the sintering phenomenon of snow. At low water vapor pressure, snow sublimates into gaseous water, with water molecules undergoing Brownian motion within the pores and forming hydrogen bonds between distinct snowflakes. Conversely, at high water vapor pressure, snow initially melts into liquid water, which migrates along the surfaces of the snowflakes and subsequently refreezes into a solid state. Both mechanisms contribute to the transformation of snow from a bulk structure to a clustered structure. An increase in sintering temperature and initial density correlates with enhanced unconfined compressive strength, peaking after 15 days of sintering, after which only minimal changes are observed. As the loading rate increases, the compressive strength initially rises, then decreases, and ultimately stabilizes, peaking at a rate of 5 mm·min^-1 and stabilizing beyond 10 mm·min^-1, and the damage mode transits from bulging to shear and finally to cleavage. Furthermore, the application of a neural network to predict unconfined compressive strength based on initial density, sintering temperature, and sintering time demonstrates strong applicability. The findings provide significant insights into the strength variations of compacted snow, thereby offering valuable guidance for the construction of snow and ice projects.

Key words： compacted snow sintering mechanism unconfined compressive strength phase change neural network

Published: 10 December 2025 Online: 2025-12-03

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	Articles by authors
	HUO Haifeng
	JIA Wentao
	SUN Tao
	CHENG Xinlei
	CHEN Qingwei
	XU Hui
	LI Tao

Cite this article:

HUO Haifeng,JIA Wentao,SUN Tao, et al. Experimental Study on the Changing Law of Compressive Strength and the Sintering Mechanism of Compacted Snow[J]. Materials Reports, 2025, 39(23): 24120101-8.

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https://www.mater-rep.com/EN/10.11896/cldb.24120101 OR https://www.mater-rep.com/EN/Y2025/V39/I23/24120101

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