MODELING OF GRAVELLY SOIL WITH MULTIPLE LITHOLOGIC COMPONENTS AND ITS APPLICATION

SOILS AND FOUNDATIONS

JIAN-MIN ZHANG¹  YILIN YU¹  GA ZHANG¹ 

[1] State Key Laboratory of Hydroscience and Engineering, Tsinghua University

关键词: constitutive model;    FEM;    gravelly soil;    mixture;    rockfill dam;    (IGC: D6/E13/H4);   

DOI  :  10.3208/sandf.47.799

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(18)The behavior of a gravelly soil with multiple lithologic components was investigated using large-scale compression and triaxial tests based on the research scheme “separating before mixing”. A series of test results showed that the behavior of a gravelly soil with multiple lithologic components was significantly dependent on the identity and proportions of the lithologic components. A new constitutive model was established to capture the main behavior of a gravelly soil with arbitrary lithologic proportions using few parameters based on the presentation of an elasto-plasticity model and the deformation mechanism of a complex soil. The parameters of this model can be determined using triaxial tests of a simple soil with a single lithologic component. The numerical efficiency of the model was confirmed by successful application to several high rockfill dams. Three-dimensional finite element (FEM) stress-strain analysis results for the Jishixia concrete-faced rockfill dam were obtained as important references for the selection of rockfill and optimizing the design of the dam.

【 授权许可】

Unknown