Geogrid is a high-performance polymeric material that is employed routinely in the construction of mechanically stabilized earth (MSE) walls. One of the mechanisms that should be controlled in such structures is the pullout mechanism. In general, pullout resistance of MSE walls reinforced by geogrid can be increased provided that soil-geogrid interaction increases. Thus, in this research, the pullout performance of a new reinforcement system, called the T-sec geogrid- which is fabricated by adding an upright geogrid to an ordinary one- is experimentally evaluated. The results of the large-scale pullout tests show that the soil-reinforcement interaction and thereby pullout resistance of the new reinforcement system increase significantly compared with those of traditional geogrid. As a result, it is possible to employ the reinforcement with a shorter length in the anchorage areas of MSE walls.
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