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

An asphalt pavement, fluid-solid coupling technology, applied in design optimization/simulation, suspension and porous material analysis, permeability/surface area analysis, etc., can solve the problem of easy clogging of double-layer porous asphalt pavement, single structural parameters, and poor drainage performance And other issues

Pending Publication Date: 2020-12-04
NANJING FORESTRY UNIV
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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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  • Double-layer porous asphalt pavement structure combination optimization method based on fluid-solid coupling

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Embodiment Construction

[0015] The present invention provides a combined optimization method for double-layer porous asphalt pavement structure based on fluid-solid coupling, and the specific implementation steps are as follows:

[0016] (1) The upper layer of double-layer porous asphalt pavement adopts porous asphalt mixture (PA)-10, and the lower layer uses PA-16. The same, the values ​​are 1.5%, 2.0%, and 2.5%, and there are three combinations of upper and lower layer thicknesses, namely, the upper layer is 4 cm thick, the lower layer is 6 cm thick, the upper layer is 5 cm thick, the lower layer is 5 cm thick, and the upper layer is 6 cm thick and the lower layer is 4 cm thick. There are three combinations of upper and lower porosity, namely the upper porosity of 20%, the lower porosity of 20%, the upper porosity of 20%, the lower porosity of 22%, and the upper porosity of 22% and the lower porosity of 20%. Combining the cross slope value of the double-layer porous asphalt pavement, the thickness ...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/28G01N15/08G06F113/08G06F119/14
CPCG01N15/0826G01N15/088G06F30/13G06F30/28G06F2113/08G06F2119/14
Inventor 孔成维许涛许杰
Owner NANJING FORESTRY UNIV
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