有压与无压烧结雪无侧限抗压强度对比试验研究

doi:10.11896/cldb.23060124

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Abstract Snow sintering is an important step in the construction of snow runways in high latitude cold regions around the world, which refers to the process of increasing strength of snow over time. In order to explore the strength change law of naturally deposited snow (sinter with pressure) and compacted snow layer (sinter without pressure), the sintered snow samples were studied by using self-developed pressurized equipment for unconfined compressive strength test. It was found that the unconfined compressive stress-strain curves presented both peak and no-peak strength forms, and the case with peak was more likely to occur under high pressure and long sintering time. The density of pressurized sintered snow samples grows with sintering time and shows the characteristics of fast and then slow, while the density of unpressurized sintering basically does not change. The strength and elastic modulus of pressurized sintered snow samples are greater than that of unpressurized sintering, and the growth rate of both are also greater than that of unpressurized. During the construction of snow runways, it is recommended to take 15 d as the design sintering time for compacted snow layers, and the unpressurized sintered snow strength slows down significantly after 15 d at sintering temperatures of around -10 ℃. The research results have excellent guidance for the determination of snow layer strength index and deformation index in the construction of snow runways.

Key words： high latitude cold region compacted snow layer sinter compressive strength elastic modulus

Published: 10 March 2024 Online: 2024-03-18

CLC number:

TU5

Fund:Fundamental Research Funds for the Central Universities (3122020040) and Tianjin Transportation Commission General Program(2019-18).

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	Articles by authors
	HUO Haifeng
	YANG Yajing
	SUN Tao
	FAN Rong
	CAI Jing
	HU Biao

Cite this article:

HUO Haifeng,YANG Yajing,SUN Tao, et al. Unconfined Compressive Strength Comparative Experimental Research of Sintered Snow with and Without Pressure[J]. Materials Reports, 2024, 38(5): 23060124-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23060124 OR http://www.mater-rep.com/EN/Y2024/V38/I5/23060124

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