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

• ROCKSOIL ENGINEERING • Previous Articles     Next Articles

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

SUN Zi-yuan1, TANG Yang2,3, ZHAO Jian-yong1, FAN Xuan1   

  1. 1. Zhejiang Huadong Engineering Construction Management Co., Ltd., Power China Huadong EngineeringCorporation Limited, Hangzhou 311122, China;
    2. Engineering Digital Technology Center, Central South Architectural DesignInstitute Co., Ltd.,Wuhan 430071,China;
    3. Key Laboratory of Geotechnical Mechanics and Engi- neeringof Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2020-04-09 Revised:2020-09-24 Online:2021-06-01 Published:2021-06-10

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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