Experimental Study on the Changing Law of Compressive Strength and the Sintering Mechanism of Compacted Snow
HUO Haifeng1,2, JIA Wentao1, SUN Tao3,*, CHENG Xinlei3, CHEN Qingwei1, XU Hui1, LI Tao1
1 School of Transportation Science and Engineering, Civil Aviation University of China, Tianjin 300300, China 2 Ministry of Transport Airport Engineering Safety and Long Term Performance Research Base, Tianjin 300300, China 3 Engineering University of the Joint Logistics Support Force, PLA, Chongqing 401331, China
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.
霍海峰, 贾汶韬, 孙涛, 成鑫磊, 陈庆炜, 徐晖, 李涛. 压实雪抗压强度变化规律及烧结机制试验研究[J]. 材料导报, 2025, 39(23): 24120101-8.
HUO Haifeng, JIA Wentao, SUN Tao, CHENG Xinlei, CHEN Qingwei, XU Hui, LI Tao. Experimental Study on the Changing Law of Compressive Strength and the Sintering Mechanism of Compacted Snow. Materials Reports, 2025, 39(23): 24120101-8.
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