Method for predicting residual fatigue life of asphalt pavement

The invention discloses a method for predicting the residual fatigue life of an asphalt pavement. The method includes: substituting a calculation result of the artificial neural network model into a relation formula between the number of times of vehicle load action and the fatigue crack of the asphalt pavement; and taking the difference between the vehicle load action times corresponding to the determined fatigue crack rate limit value and the load action times actually borne by the asphalt pavement as the residual fatigue life of the asphalt pavement. The method is based on an artificial neural network and a statistical method, a back calculation process is omitted, data such as pavement layer thickness, modulus, dynamic deflection value and road technical conditions which are easily obtained by engineering technicians are used, and prediction based on indoor test data is not needed. According to the prediction method for the residual fatigue life of the asphalt pavement, predictionis carried out based on d