Abstract
The method of evaluation of the in-soil deformation behavior of geogrid is discussed based on the simplified assumptions concerning frictional properties between geogrid and soil and pull-out force vs. strain relationship of geogrid. By solving differential equation on the elongation of geogrid in the soil derived from the assumptions, displacement of geogrid in the soil, the distribution of shear stresses and tensile forces acting any part of reinforced soil can be obtained, and the pull-out force vs. pull-out displacement can also be calculated. The comparison of the calculated and measured pull-out force vs. displacement relationship shows fairly well coincidence.Proposed method has a special feature that we can estimate the displacement of geogrid in any part of the reinforced soil as well as the pull-out force vs. pull-out displacement relationship by using the result of direct shear test only.
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