Abstract
Asphalt pavement has structural problem that is low durability against traffic loads and environmental interaction. In Western countries, reinforcing technologies using geosynthetics have often been used to reinforce the base layer to improve the stability. On the other hand, studies on the application of soil reinforcing technologies such as geosynthetics to pavement systems are limited in Japan. In the present study, the effects of geogrid reinforcing method on the residual deformation characteristics of flexible pavement structure are examined. From the results of laboratory wheel loading tests on asphalt pavement, it was confirmed that arranging geogrid in the subbase has advantage to reducing the residual settlement caused by heavy traffic load. Well-compaction is important to increase the reinforcing effects.
