Abstract
Although the maintenance work of pavement is often planned based on MCI and FWD data, the repeated damages of pavement are observed at many places. In order to avoid repeated maintenance works of pavement, the condition of earthfill structure was evaluated by an easy logging technique in this study. Based on the investigated result, the test repair work was planned and carried out for the base course by using several replacement materials, such as crushed stones, geocells with crushed stones, bitumen stabilized material, and bitumen stabilized material with geogrids. In order to confirm the effect of base course improvement, the surface wave exploration and Falling Weight Deflectometer tests were carried out before and after the test construction. The strain distribution of the base course was also monitored by using the optical fiber sensor inserted into the geogrid. This paper summarizes the test construction and the effect of base course improvement.
