Study On The Evolution Characteristics Of Pavement Performance Index PQI In Arid Desert Area

Road traffic plays an important role in all aspects of social development.In recent years,along with the economic rise of China,we have made great achievements in the cause of traffic,but there are many problems to be solved in the process of development,especially in the highway maintenance management,the state and the evolution rules of the pavement of the master is not accurate,resulting in maintenance time and maintenance methods set unreasonable,or even cause a waste of money.In order to study the evolution law of pavement performance,it is necessary to evaluate it objectively and accurately.According to the pavement disease survey in Xinjiang area and detection data of each single index analysis,I determine the evaluation index of the representative of the road pavement is damage evaluation index PQI,flat structure strength evaluation index RQI,structural strength index PSSI,combined with the actual situation of the region,to determine the weight of each index by variable the theory,the facts indicate that the variable weight theory makes an effective solution to a problem that the constant weight evaluation method has,when a index evaluation score is too low and the weight is too small,it has little effect on the shortcomings,the dynamic weight is more suitable for pavement evaluation results of the actual situation.In this paper,the synthetic method of variable weight and matter-element model is respectively used to evaluate the pavement performance PQI,it showed that the synthetic method of variable weight and matter-element model in pavement performance evaluation is more reasonable,objective and accurate.Based on the use of objective evaluation on the performance of pavement,I used the PQI score of synthetic method of variable weight and the correlation of matter-element model to study the evolution of pavement performance by regression analysis,and make the regression equations in Exel,through the comparison of the two methods,I found that the regression equation of matter-element model is more representative in the evolution law of pavement performance PQI.