Anti-skid Evaluation And Maintenance Decision Of Asphalt Pavement Based On Fuzzy Comprehensive Method

Inadequate pavement skid resistance is one of the main causes of traffic accidents.With the development of economy,the traffic volume is gradually increasing,ensuring that the road surface has good anti-slip performance is the premise of reducing traffic accidents and ensuring traffic safety.The pavement anti-skid index is one of the important indexes to evaluate the safety performance of road traffic.In daily road maintenance,accurate evaluation of the anti-skid performance of the pavement is essential to ensure the safety and smoothness of the road.By studying the anti-skid technology evaluation of asphalt pavement,the paper establishes a comprehensive anti-slip performance evaluation method,correctly selects measures to improve the anti-slip performance of asphalt pavement,reasonably determines the road maintenance time,and timely and effectively performs asphalt pavement that does not meet the requirements of anti-slip performance It is of guiding significance to maintain,reduce the rate of traffic accidents and extend the service life of road surfaces.The research results of the thesis are as follows:1.On the basis of literature research,compare the applicability,advantages and disadvantages of the anti-skid evaluation test methods,technical indicators and evaluation standards of China’s highways,and choose the lateral force coefficient SFC for the sake of feasibility and economy And the structural depth TD value are used to evaluate the anti-skid performance of the measured road surface;2.Analyzed the influence of roads,vehicles and environment on the anti-skid performance of the pavement.For the commonness and characteristics of the factors affecting the anti-skid performance of the asphalt pavement,a gray correlation analysis and correlation analysis were carried out to obtain the traffic volume,temperature and precipitation The amount has a great influence on the pavement anti-skid performance,and the main influencing factors to find the lateral force coefficient and structural depth are traffic volume,temperature,precipitation,road age,road gradation,driving speed,etc.;3.Based on the principle of fuzzy mathematics,the comprehensive weight calculation of the entropy weight method and the analytic hierarchy process was carried out for various influencing factors of asphalt pavement anti-slip,and the fuzzy comprehensive evaluation result was determined in conjunction with the maximum membership method.The research puts forward the fuzzy comprehensive anti-skid evaluation value M of pavement that can reflect both the micro-structure lateral force coefficient and the macro-structure coefficient,and take the weight of the lateral force coefficient and the structural depth as a=0.6,b=0.4 respectively;The pavement anti-slip index SRI was improved,and the same fuzzy comprehensive evaluation value M was used to replace the lateral force coefficient SFC,a new pavement comprehensive anti-slip performance index MST was recalculated and the pavement performance was evaluated and graded.Through example verification,the comprehensive evaluation of fuzzy theory is effective in the post-evaluation of detecting the anti-skid performance of the pavement,and can provide a basis for pavement maintenance.4.Research and analysis of the common anti-skid measures and characteristics of asphalt pavement in China and the anti-slip resistance decay law under different traffic conditions,and establish a decision map of insufficient anti-slip properties of asphalt pavement;and use the fuzzy comprehensive anti-slip maintenance evaluation method of asphalt pavement Theoretically verify and guide the actual maintenance project,and put forward a maintenance decision plan.