Study On Anti-sliding Disposal Decision Based On The Decay Law Of Anti-sliding Performance Of Asphalt Pavement

Road traffic safety is closely related to the skid resistance of asphalt pavement.In the southeast coastal area of our country,it is easy to cause traffic accidents due to the lack of skid resistance.In order to keep the anti-skid performance of asphalt pavement above the minimum allowable level at all times and reduce the occurrence of traffic accidents,it is necessary to analyze the decay law of anti-skid performance of asphalt pavement in order to establish the anti-skid treatment opportunity and implementation scheme of asphalt pavement.Firstly,this paper summarizes the concept and method of anti-skid disposal decision-making of asphalt pavement,describes the decay mechanism and influencing factors of anti-skid performance in detail,lists the evaluation indexes of anti-skid performance of asphalt pavement and indoor and outdoor test methods.Secondly,the decay law of anti-sliding performance of different types of asphalt mixture and different curing methods are compared and analyzed.The prediction model of HDM-4 asphalt pavement’s anti-skid performance is corrected by the method of planning solution,and the accuracy of the model is verified by regression analysis.The prediction model of Asphalt Pavement’s anti-skid performance is established.In the process of correction,the conversion method of on-site traffic volume and indoor test wear times is put forward.Thirdly,based on the theory of life cycle analysis,the cost composition of anti-sliding treatment of asphalt pavement is determined.From the three aspects of economy,environment and society,the benefit target of anti-skid disposal scheme is extracted: the improvement of anti-skid performance of pavement and the reduction of traffic accident rate.Based on the prediction model of anti-slide performance,cost composition and benefit target of asphalt pavement,a multi-objective optimal anti slide disposal decision model is established.Finally,the key content of the decision-making of anti-skid disposal of asphalt pavement is studied from the aspects of anti-skid disposal measures,anti-skid disposal timing,anti-skid disposal scheme formulation,etc.,and the decision-making of anti-skid disposal of high-grade highway asphalt pavement in Zhejiang Province is discussed,taking the north extension section of Hangchang expressway as an example.The research results of this paper can be summarized as follows:(1)the general process of anti-skid disposal decision-making of asphalt pavement is given,and the decay law of anti-skid performance of asphalt pavement is summarized: the initial decline is rapid,and then tends to be stable;(2)the prediction model of anti-skid performance of asphalt pavement is constructed.In the process of correction,it is found that there is no significant correlation between the traffic volume and the lateral force coefficient of several road sections,and the index equation of road age lateral force coefficient is used as the prediction model;(3)the multi-objective optimization decision-making model for anti-sliding disposal is constructed;(4)the main content of anti-sliding disposal decision-making of asphalt pavement is discussed in detail,and the lateral force coefficient is used as the anti-sliding performance of asphalt pavement in Zhejiang Province The evaluation index,with its value of 45 as the minimum allowable level of pavement anti-skid performance,uses dynamic programming method and benefit cost method to solve the multi-objective optimization model to obtain the best anti-skid disposal scheme.