QUANTITATIVE ANALYSIS FOR RISKS OF POTHOLE OCCURRENCES IN POROUS ASPHALT PAVEMENT

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  • 排水性舗装におけるポットホール発生リスクに関する定量分析
  • ハイスイセイ ホソウ ニ オケル ポットホール ハッセイ リスク ニ カンスル テイリョウ ブンセキ

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We have analyzed the periodically measured data using the high-accuracy pavement-condition measuring vehicle in expressways of Shikoku, to fully understand the progress of porous asphalt pavement damages. As a result, it is found that when the local subsidence phenomena occur, they would develop from cracks to potholes in a short time. It is very difficult to find these damages earlier even through the conventional evaluation indexes (cracks, rutting, flatness) or survey frequency. This study makes it possible to quantify the risk of pothole occurrences, by identifying the damaging index of accelerating the local subsidence phenomena on the porous pavement by applying Survival Time Analysis, and by estimating the Survival Curve classified by the damaging factors which influence the increasing pothole occurrence risks. This report will be the basic documents for the repair planning which will prolong the porous asphalt pavement life, and contribute to reducing the pothole occurrence risks by proposing the quantifying evaluation flow based on the analysis results.

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