冻融循环作用下煤渣改良土的双屈服面本构关系研究

doi:10.13722/j.cnki.jrme.2018.0129

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Abstract Triaxial consolidated and drained shear tests under different freeze-thaw cycles were carried out to study the evolution of the yield surface and the stress-strain relationship of cinder improved soil. The optimal amount of cinder and the evolution of the yield surface were obtained. The evolution of the yield surface after several freeze-thaw cycles were described by introducing the influence factors of freeze-thaw cycles. The elasto-plastic constitutive relation was established according to the test results. The results showed that the strength of the improved soil increases firstly and then decreases with the gradual increasing of cinder content. The maximum shear strength was obtained when the cinder content was 15%. The yield surface for shear shrinking and shear dilation shrinks gradually towards the origin of coordinates with the increasing of freeze-thaw cycles. The effect of the first 5 freeze-thaw cycles was more obvious，then the change of the yield surface decreased gradually. The constitutive model was established based on the influence factors of freeze-thaw cycles which described the stress-strain relationship of the improved soil well.

Key words： road engineering freeze-thaw cycles cinder improved soil constitutive relation yield surface influence factors

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	Articles by authors
	ZHANG Xiangdong
	REN Kun
	SUN Handong
	XING Yudi
	YANG Jianjun

Cite this article:

ZHANG Xiangdong,REN Kun,SUN Handong, et al. Constitutive relationship with double yield surfaces for cinder improved soil under freeze-thaw cycles[J]. , 2018, 37(8): 1916-1923.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0129 OR http://www.rockmech.org/EN/Y2018/V37/I8/1916

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