Research on Correlation between Shear Strength of Coarse-grained Soil and Particle Size and Shape
In order to reveal the correlation between the shear strength of coarse-grained soil and its particle size and shape,it is possible to estimate the shear strength of coarse-grained soil through the statistical indicators of particle size and shape without conducting relevant experiments.The laboratory direct shear test was carried out on glass beads with different particle sizes by using a large-size direct shearing apparatus.The simulated direct shear tests were carried out respectively to reveal the influence of particle size and shape on the shear strength of coarse-grained soils.The method of multiple linear regression was used to establish the relationship between internal friction angle and particle surface to volume ratio,sphericity and particle size.The results show that the larger the particle size,the greater the shear strength of coarse-grained soil,and the two have a good quadratic function relationship.The sphericity to surface area ratio of particles can be used as a key three-dimensional shape index affecting the shear strength of coarse-grained soil.Without considering particle breakage,particle size and particle shape correlate well with the internal friction angle.The results of this study can be used to preliminarily estimate the shear strength of coarse-grained soil,which has certain practicability.
particle shapeshear strengthcoarse-grained soildiscrete element method
万方数据
维普
