Study on comprehensive evaluation of pavement condition based on comprehensive integration weighting method and cloud model

In order to improve the accuracy of the comprehensive evaluation results of the pavement condition, this paper conducted a letter inquiry on the weight of each evaluation index of the pavement in the form of several rounds of expert questionnaire according to the Delphi method. Then the correlation degree of each index to the comprehensive evaluation results is measured according to the grey relational degree theory so as to achieve the purpose of revising the comprehensive evaluation model of road condition; Secondly, based on the cloud model theory, this paper constructs the index weight-cloud model and membership-cloud model. By analyzing the cloud characteristic parameters and the effect diagram of the cloud model, it analyzes the fuzziness, randomness and discreteness existing in the process of road condition evaluation model, so as to verify the reliability of the modified evaluation model. The engineering example shows that the modified pavement performance evaluation model has sufficient reliability.