Double-layer porous asphalt pavement structure combination optimization method based on fluid-solid coupling

Abstract

The invention relates to a double-layer porous asphalt pavement structure combination optimization research method based on fluid-solid coupling, and belongs to the technical field of double-layer porous asphalt pavement structure combination optimization. According to the method, an orthogonal test, data fitting, a leakage analysis test, a scattering test and a pavement performance test are usedfor determining the upper-layer and lower-layer gradation and the optimal asphalt-aggregate ratio of a double-layer porous asphalt pavement; and double-layer porous asphalt pavement discrete element models are generated by utilizing discrete element software according to the upper-layer and lower-layer gradation of the double-layer porous asphalt pavement. And the drainage performance of each double-layer porous asphalt pavement discrete element model is analyzed by adopting hydrodynamic software, and an optimal structure parameter combination is determined. By adopting the method, the problemthat the double-layer porous asphalt pavement structure parameter combination research is single and fails to systematically analyzes various structure parameter combinations is solved. According tothe method, structural parameters of the double-layer porous asphalt pavement are systematically analyzed, structural combination optimization research of the double-layer porous asphalt pavement is more reasonable and perfect, and meanwhile, the method has good drainage performance and anti-blocking performance.

Description

technical field [0001] The invention relates to a combined optimization method for double-layer porous asphalt pavement structure based on fluid-solid coupling, and belongs to the field of double-layer porous asphalt pavement structure design. Background technique [0002] Driven by the slogan of a powerful country in transportation, the traditional expressway network with dense pavement structure extends in all directions, and the history of asphalt pavement accounts for more than 90% of the total mileage of my country's high-grade highways, and my country's high-grade highways have made great progress. The problem of driving safety in rainy weather has gradually become one of the key directions in the research of asphalt pavement structure. [0003] The porosity of double-layer porous asphalt pavement is generally about 20%, and the service life is 8-10 years. The fine-graded porous structure of the upper layer plays the role of "screen effect", which can prevent larger p...

AI Technical Summary

Problems solved by technology

The present invention solves the problem of double-layer porous asphalt pavement structure combination optimization considering single structural parameters, and does not conduct multi-parameter structure combination optimization from the overall perspective of fluid-solid coupling analysis of the upper and lower layers of double-layer porous asphalt pavement, resulting in easy blockage and drainage of double-layer porous asphalt pavement Poor performance and other issues

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