Study on influencing factors of expressway pavement maintenance based on grey fixed-weight clustering

Based on the deterioration mechanism of expressway pavement, the effect of highway quality (abbr. EHQ) is added to the impact factors of expressway pavement maintenance, and grey fixed-weight clustering method is used to analysis and calculate it, taking some of expressways in Shandong province as example. The simulation and prediction of expressway pavement current repair is improved to be more accurate and in line with reality, and highway maintenance strategy is made perfectly valid.