Research on the Influence of Permeability on Deformation of Gravel Subgrade by a Hypoplastic Constitutive Model

SUN Zi-yuan; TANG Yang; ZHAO Jian-yong; FAN Xuan

doi:10.11988/ckyyb.20200297

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Journal of Changjiang River Scientific Research Institute ›› 2021, Vol. 38 ›› Issue (6) : 86-92. DOI: 10.11988/ckyyb.20200297

ROCKSOIL ENGINEERING

Research on the Influence of Permeability on Deformation of Gravel Subgrade by a Hypoplastic Constitutive Model

SUN Zi-yuan¹, TANG Yang^2,3, ZHAO Jian-yong¹, FAN Xuan¹

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Abstract

It is an important premise of evaluating the stability of embankment foundation to analyze accurately the changes of internal structure and parameters of gravel soil materials under the action of permeability. With the crushing rock aggregates of limestone at Shuibuya project as the parent material, we prepared three groups of specimens with varied compactness by sieving test and compaction test. Through permeability deformation test, we investigated the effect of permeability on the loss of fine particles in the gravel soil and the permeability-induced deformation. By large scale triaxial test, we obtained the changes in strength and deformation parameters of gravel soil before and after extreme permeability action. Furthermore, we embedded the hypoplastic constitutive model into ABAQUS software to describe the stress-strain relationship of gravel soil before and after particle loss and calculated the settlement deformation before and after particle loss. The results can be used as reference for the engineering design for embankment foundation and calculation for permeability deformation.

Key words

gravel subgrade / permeability-induced deformation / large scale triaxial test / hypoplastic constitutive model / embankment foundation stability

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SUN Zi-yuan, TANG Yang, ZHAO Jian-yong, FAN Xuan. Research on the Influence of Permeability on Deformation of Gravel Subgrade by a Hypoplastic Constitutive Model[J]. Journal of Changjiang River Scientific Research Institute. 2021, 38(6): 86-92 https://doi.org/10.11988/ckyyb.20200297

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