Asphalt Pavement Performance Prediction And Analysis Of Selecting Preventive Maintenance Schemes

With the rapid development of highway construction, it appears a lot of maintenance andmanagement problem. As a method of improving the service level of the road and achievingvalue insurance and appreciation of assets, pavement preventive maintenance has beenapproved and applied by our country management department. Because of many influencingfactors and indexs associated with preventive maintenance decision, it appears obviousambiguity and uncertainty. In this paper, the main purpose is to establish a scientific andquantitative preventive maintenance decision-making system and to promote extension andapplication of the pavement preventive maintenance technology.In this paper we mainly studied the evaluation system of preventive maintenance index,and established the evaluation system which contained pavement quality index, structurestrength index, pavement condition index and skidding resistance. After studying manyprediction models, this paper took the prediction of pavement condition index by the greyMarkov model in order to predict the pavement condition which had a few data.In this paper, the optimal timing of preventive maintenance was studied. It established adiagnostic method based on benefit-cost ratio analysis. It proposed the method of effectquantification and introduced the concept of standardized effect; according to the ratio ofeffect and cost, the timing plan which had the biggest ratio, would be the optimal timing forpavement preventive maintence.This paper also established the maintenance decision-making model. With the problemsof limited funds and other conditions, this paper took the Network-level Decision-makingmodel by the objective programming approach. In order to solve the road disease,Project-level Decision-making Model used the decision tree method and provided rightconservation measures for the decision makers.