Study on Engineering Characteristics of Coarse-Grained Soil Based on Large-Scale Triaxial Test

Abstract:

Using large-scale shearing device, isotropiclly consolidated-drained triaxial test under different confining pressures are performed for overburden material of ShuangJiangKou earthdam which relative density is 0.9. The engineering characteristics of coarse-grained soil such as strength and deformation is studied. The results show the peak strength of coarse-grained soil under isotropically increase with the confining pressure and there is a relationship of linear between the peak strength of coarse-grained soil and initial modulus. The volume strain value of isotropically consolidated-drained triaxial shear test increase with increase of confining pressure, and the dilatancy decrease increase with increase of confining pressure. The secant modulus E_s1 and the tangent modulus E_t1 obtained by the tests both increase with increase with increase of confining pressure, and the values of E_s1/E_i and E_t1/E_i are all smaller than one. The failure poisson ratio ν_if obtained by the tests both decrease with increase with increase of confining pressure, and there is a relationship of power function between νif and .

• Periodical: Advanced Materials Research (Volume 936)
• Pages: 1387-1392
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.936.1387
• Online since: June 2014
• Authors: Fu Yong Chu*
• Keywords: Coarse-Grained Soil, Engineering Characteristics, Strength and Deformat, Triaxial Test

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