Based On Life Cycle Costs Of Asphalt Pavement Preventive Maintenance Timing

As the construction of domestic highways develops rapidly, more and more highways need maintenance so that the maintenance funds are relatively in short of supply and the quality of maintenance is low. The most effective way to change the current passive situation is to adopt preventive maintenance. Pavement preventive maintenance plays a significant role in preserving the function of highways and its effectiveness is closely related to the timing of maintenance. However, a better way to seize the right time has not yet been found home and abroad up to now. Taking the current development of asphalt pavement into consideration, the author of the thesis put forward the method to specify the optimal timing of preventive maintenance based on life style cost and establish the model as well.Based on the features of highway preventive maintenance project and focusing on the influence that maintenance project has on the transportation cost of vehicles, the author establishes a cost framework befitting the analysis of life cycle cost of preventive maintenance project; proposes the method of effect quantification and presents the method to specify the effect weighting coefficient and gives a quantification analysis; According to the ratio of effect and cost, the timing plan which has the biggest ratio, will be the optimal timing for pavement preventive maintence. Definite asphalt pavement preventative maintenance opportunity models constructed was applied in the preventative maintenance project of the JILIAO freeway of Shangdong province and the determinative suggestion was presented. Then the analyse of some effective techniques of pavement preventive maintenance home and abroad helps the maintenance department take the best preventive maintenance measure according to different states of highways.