Abstract:Two kinds of equipment are used to simulate the function of water spraying and suction in the function recovery equipment of porous asphalt pavement. And the simulation method of pavement function recovery equipment operation is designed. The experiment is designed according to four factors and three levels orthogonal table. The recovery rate of permeability coefficient, the Cantabro flying loss and the slab flying loss are used as evaluation indexes to obtain the effect of cleaning and the influence on the performance of the mixture under different equipment parameter. And the optimal plan of porous aspahlt pavement void cleaning was determined according to the research above. Apply the best plan to the test road and evaluate its effect. The results show that the water pressure has the greatest impact on the test results, followed by the water outlet angle and negative pressure suction power, and the two are relatively close, and the flushing times has the slightest impact. The best combination of parameters is 15 MPa water pressure, 45° water inlet Angle, 2 flushing times and 4 800 W recovery power. After the void cleaning of clogging porous asphalt pavement, the permeability coefficient of the pavement has been greatly improved and can be restored to meet the requirements of the specification, indicating that the cleaning plan proposed in this paper can effectively restore the permeability performance of the pavement.