人工冻结砂土与结构接触面冻结强度试验研究

doi:10.13722/j.cnki.jrme.2015.1511

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Abstract To explore the influential factors，regular patterns and mechanism of adfreezing strength on the interface between artificial frozen sand and structure，an experimental study was conducted with the large-scale direct shear apparatus developed in-house. All the adfreezing strengths were found to be affected notably by many factors， such as freezing temperature，normal stress and roughness，etc. The adfreezing strengths increased with decreasing temperature. The ultimate adfreezing strength presented a linear relation with the temperature，and the residual adfreezing strength varied with the temperature and presented three typical regular patterns. The adfreezing strengths increased with increasing the normal stress. The relation between the ultimate adfreezing strength and the normal stress was in line with Mohr-Coulomb criterion，and the residual adfreezing strength varied with the normal stress and also presented the same three typical regular patterns. The adfreezing strengths increased with increasing the roughness. The relation between the ultimate adfreezing strength and the roughness satisfied a logarithmic function. The fluctuation cycle about the residual adfreezing strength curves increased with increasing the roughness. In addition，the internal mechanism of adfreezing strength was revealed. The stick slip phenomenon in the residue adfreezing strength was also explained. Through the regression analysis of multiple factors affecting the adfreezing strength，an empirical formula for the adfreezing strength related to the temperatures，normal stress，and roughness was derived.

Key words： soil mechanics ultimate adfreezing strength residual adfreezing strength influential factors artificial frozen sand structure interface

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	SHI Quanbin1
	2
	YANG Ping1
	WANG Guoliang1

Cite this article:

SHI Quanbin1,2,YANG Ping1, et al. Experimental study on adfreezing strength of the interface between artificial frozen sand and structure[J]. , 2016, 35(10): 2142-2151.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.1511 OR http://www.rockmech.org/EN/Y2016/V35/I10/2142

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