Experimental Research on the Permeability Property of Coarse Grained Soils Considering the Particle Shape
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Abstract:
The permeability property of coarse grained soils is closely related to material composition, grain size distribution, particle shape, and particle density. Based on the laboratory permeability test, the effects of particle shape, grain size distribution, and particle density on the permeability property of coarse grained soils were studied. Nine orthogonal experiments and two particle shape experiments were performed. The results showed that grain size distribution has the largest impact on permeability based on the range analysis and variance analysis of the orthogonal tests, and permeability increases with the increasing of particle sphericity based on the comparative analysis of two particle shape tests. The estimation formula of critical hydraulic gradient was proposed using the permeability coefficient as a variable based on the analysis of permeability characteristics reflected by the above tests.
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