NEW REPAIR MEASURES FOR EXPRESSWAY PAVEMENT BASED ON DATA LINKAGE OF ROAD SURFACE CONDITION SURVEY AND DAILY INSPECTION

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  • 路面性状調査と日常点検のデータ連携に基づく高速道路舗装の新たな修繕施策

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<p> The length of the expressway operated by NEXCO-West has reached about 3, 500 km, and half of them have been in service for more than 30 years. In order to provide safe, secure, and comfortable pavement condition, pavement repair measures that can extend the service life of pavements should be developed based on the effective use of monitoring information. Pavement monitoring is classified as routine inspections by daily patrol and road surface condition surveys every 1 to 3 years. Maintenance including crack sealing and patching are planed based on the results of daily inspections, and rehabilitation as cutting overlays, are planed based on the results of road surface condition surveys, each of which is managed independently. Therefore, the information from daily inspections may not be fully utilized in the rehabilitation planning. In this study, we analyzed the deterioration trend of expressway pavements by linking daily inspection data, road surface condition survey data, and as-built pavement information based on location information such as routes, lanes, and kilo-posts. Through this analysis, the quantitative evaluation method of pavement damage using information obtained from the road surface is examined, and the method of formulating repair measures according to the progress of pavement deterioration is discussed, as well as the direction toward a longer repair cycle based on the importance of the asphalt layer thickness.</p>

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