含超径颗粒土石混合体的大型三轴剪切试验研究

doi:10.13722/j.cnki.jrme.2016.1638

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Abstract To investigate the mechanical response of soil rock mixtures(SRM) with the oversized blocks，large-scale triaxial shear consolidated undrained(CU) tests under different confining pressures were conducted on the unconventional sample of soil rock mixtures with the volumetric block proportions(VBP) of 25%，35% respectively. The results showed that the volumetric change was still observed under the condition of undrained tests for the soil rock mixtures with the oversized blocks. The volumetric strain of soil rock mixtures with the volumetric block proportion of 35% showed the characteristics of shear contraction at the initial stage，the shear dilatation，the secondary shear contraction，and the shear dilatation once again at the higher confining pressures. The curves of the deviator stress against the axial strain are smooth under the volumetric block proportion of 25%. However the curves of the deviator stress against the axial strain have the zigzag shape under the volumetric block proportion of 35%. The jump phenomena of the stress，volumetric strain and pore water pressure were exhibited.

Key words： soil mechanics soil rock mixtures oversized particles large-scale triaxial shear test volumetric block proportions volumetric strain jump phenomena

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	Articles by authors
	XIA Jiaguo1
	2
	HU Ruilin1
	QI Shengwen1
	GAO Wei1
	SUI Haoyue1
	2

Cite this article:

XIA Jiaguo1,2,HU Ruilin1, et al. Large-scale triaxial shear testing of soil rock mixtures containing oversized particles[J]. , 2017, 36(8): 2031-2039.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.1638 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/I8/2031

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