桩承式加筋土结构拓宽路基工作特性离心模型试验

doi:10.13722/j.cnki.jrme.2021.0052

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Abstract As a new kind of widening structure with smaller occupied area，lower cost of ground treatment and less requirement for fill，the pile-supported reinforced-earth wall(PSRW) has been used to widen the four-lane expressway. By means of centrifugal model test，both the PSRW and the geosynthetic-reinforced pile-supported embankment(GRPS) are used respectively to widen the existing subgrades that with or without piles. A total of 4 cases are selected and both the external deformation and internal stress characteristics after widening are obtained. The test results demonstrate that the PSRW has better stability than the GRPS when used for subgrade widening，because the GRPS widen subgrade built on the original subsoil without consolidation directly without slope cutting. Widening by PSRW can reduce the surface settlement of the subgrade effectively. When the existing subgrade with piles is widened by GRPS，the effect of widened subgrade on the piles at the central axis of subgrade is far greater than that of widened by PSRW，while the axial force of piles is slightly less.

Key words： pile foundations pile-supported reinforced-earth wall geosynthetic-reinforced pile-supported embankment subgrade widening centrifugal model test

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	Articles by authors
	LI Li1
	CAO Wenzhao2
	LIU Yang1
	ZHENG Junjie1
	LI Bo3

Cite this article:

LI Li1,CAO Wenzhao2,LIU Yang1, et al. Centrifugal model test on the performance of pile-supported reinforced-earth structure for subgrade widening[J]. , 2021, 40(S2): 3357-3366.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0052 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/IS2/3357

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