循环移动轮载下粗粒土路基填料永久变形特性及安定分析

doi:10.13722/j.cnki.jrme.2020.0165

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Abstract Conventional repeated load triaxial(RLT) tests can only simulate the cyclic load pulsed vertically. In order to study long-term deformation and failure mechanisms due to moving wheel loads more realistically，a series of RLT tests with both constant and variable confining pressure levels were conducted on typical base and subbase unbound granular materials. Different realistic in-situ stress paths defined by stress path slope，stress path length and minimum mean principal stress were applied. The coupling effect of cyclic deviatoric and confining stress components on the accumulation of the axial plastic strain was explored. Considering that the existing shakedown criteria for permanent deformation behavior cannot accurately distinguish different stages of permanent deformation behavior and are established from traditional RLT tests with constant confining pressure，a new criterion was proposed to address such insufficiencies. The improved accuracy and applicability of the modified shakedown analysis method and its criteria were confirmed by the realistic stress path test results obtained in this study.

Key words： rock mechanics coarse-grained embankment materials repeated loading variable confining pressure triaxial tests permanent deformation shakedown analysis

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	Articles by authors
	ZHENG Keyang1
	2
	XIAO Yuanjie1
	3
	WANG Meng1
	WANG Bin4
	YAN Jinlong4
	CHEN Xiaobin1
	3
	YE Xinyu1

Cite this article:

ZHENG Keyang1,2,XIAO Yuanjie1, et al. Permanent deformation characteristics and shakedown analysis of coarse-grained embankment materials under moving wheel loads#br#[J]. , 2020, 39(9): 1930-1943.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0165 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/I9/1930

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