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Comparison of in-soil deformation behavior of geogrid observed by pull-out test results and those calculated by the authors' formerly proposed method was performed. Based on the results, it has been pointed out that it is important to construct a reinforced soil structure so that sufficient frictional resistance develops between soil and geogrid since the pull-out force vs. pull-out displacement relationships depend not only on the embedded length of geogrid but on the normal stress exerted on the geogrid.From a series of pull-out tests and in-soil creep tests, it has been found that the pull-out force vs. pull-out displacement relationship for both tests almost coincide with each other within the range of the pull-out force smaller than sustained creep load. Based on the comparison between calculated in-soil creep deformation behaviors by using the method proposed in this paper and those observed by in-soil creep test, the importance of the establishment of design method considering not only the deformation of geogrid itself but the overall deformation of the reinforced soil structure due to the relative displacement between soil and geogrid has been pointed out.
国際ジオシンセティックス学会日本支部の論文