桩底水热效应对模型桩–冻土流变特性影响的试验研究

doi:10.13722/j.cnki.jrme.2015.1088

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Abstract In order to investigate the influence of pile bottom water on the stability of pile foundation in frozen soil，the concrete model piles and pile bottom water thermal device were made. The contrast experiment method was adopted by loading step by step to study the effect of pile bottom water heat on the rheological properties of frozen soil pile-soil，in which transfer curves of tangential freezing stress on pile body and pile tip resistance were obtained. Under the different load level，the influences of pile bottom water on the relative displacement between pile and soil，pile tip resistance，rheological characteristics of pile-soil，load transfer characteristics，and bearing characteristics of pile foundation were analyzed. The results show that the pile bottom water weaken the freezing strength of frozen soil in pile side and soil resistance at pile bottom，which increase relative displacement between pile and soil and pile-soil rheological effect. The pile bottom water can impact the load proportion of the freezing force and end resistance of a pile foundation，in which the pile foundation is excessively dependent on the tangential freezing stress on pile body to bear the load. Above effects increased with the load level result in a serious decline of bearing capacity of pile foundation.

Key words： pile foundation frozen soil model pile thermal effect of pile bottom water rheology experimental study

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	Articles by authors
	WU Yaping1
	LIU Zhen1
	WANG Ning1
	LIU Yazun1
	LU Xiaoqiang1
	NIU Fujun2

Cite this article:

WU Yaping1,LIU Zhen1,WANG Ning1, et al. Experimental study of the thermal effect of pile bottom water on the rheological property of model pile-frozen soil[J]. , 2016, 35(S1): 3424-3431.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1088 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3424

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