干湿循环作用下压实黄土强度劣化模型试验研究

doi:10.13722/j.cnki.jrme.2018.0770

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Abstract In order to fully understand the strength deterioration law of compacted loess caused by wetting-drying cycles，a series of triaxial tests considering the influence of the dry density，the wetting-drying amplitude and the lower bound water content of drying-wetting cycles were carried out，and the strength deterioration curves of compacted loess under different influencing factors were obtained. The effects of the dry density，the wetting-drying amplitude and the lower bound water content on the strength deterioration law were quantitatively analyzed by fitting a hyperbolic function to the deterioration data and as a result，a compacted loess deterioration model(CLDM) was established. Besides，SEM tests were carried out to study the microstructure change caused by wetting-drying cycles. A Python-based secondary development of finite element software was carried out in order to apply CLDM to ABAUQS，by which the stability of a loess fill slope after exposure to drying-wetting cycles was analyzed，and the applicability of the CLDM model was validated. Research results provide a theoretical basis for the analysis of the strength deterioration of compacted loess caused by wetting-drying cycles and for the prediction of fill slope disasters.

Key words： soil mechanics wetting-drying cycles compacted loess strength deterioration fitting analysis secondary develop

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	Articles by authors
	HU Changming1
	YUAN Yili1
	WANG Xueyan1
	2
	MEI Yuan1
	LIU Zheng1

Cite this article:

HU Changming1,YUAN Yili1,WANG Xueyan1, et al. Experimental study on strength deterioration model of compacted loess#br# under wetting-drying cycles[J]. , 2018, 37(12): 2804-2818.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0770 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/I12/2804

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