粒度調整砕石内に敷設されたジオグリッドの引抜き剛性に関する実験的検討

概要

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In this study, pullout tests of geogrid embedded in well-graded gravel were performed, in order to establish the design procedure of GRS integral bridge which was proposed as a new type of bridge abutment using reinforced-soil method. The pullout tests were focused on the effect of confining pressure and stiffness of geogrid on the pullout stiffness characteristic of geogrid. The experiments revealed that the pullout stiffness was largely affected by the confining pressure. This is due to the increase of friction and inter-rocking resistance mobilized between the geogrid and the gravel as well as the decrease of free length of geogrid. The pullout stiffness of geogrid was also affected by the relative displacement between the geogrid and the gravel.
国際ジオシンセティックス学会日本支部の論文