SEDL / STP / STP1190-EB / STP24318S

Evaluation of Shear Strength and Dilatancy Behavior of Reinforced Soil from Direct Shear Tests

Bauer, GE
Professor, Center for Geosynthetics Research Information and Development (C-GRID)Carleton University, Ottawa,

Zhao, Y
Ph. D. Student, Carleton University, Ottawa,

Pages: 14    Published: Jan 1993

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Abstract

In order to evaluate the shear strength and dilatancy behavior of coarse granular soils reinforced with geogrid a large direct shear apparatus (1000×1000×940 mm) was built. A series of shear tests were carried out to study the effect of geogrid orientation and soil volume changes on shear strength. A numerical model is proposed to calculate the shear strength increase. This is verified by the experimental results. Tensile strains in the geogrid can also be calculated using this model.