Double-layer drainage asphalt pavement pore structure attenuation law analysis method

A technology of drainage asphalt and pore structure, which is applied in the direction of roads, roads, pavement details, etc., and can solve problems such as secondary compaction of double-layer drainage asphalt pavement without consideration

Pending Publication Date: 2020-12-15
NANJING FORESTRY UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for analyzing the attenuation law of the pore structure of the double-drainage asphalt pavement, so as to solve the problem that the secondary pressure of the double-drainage asphalt pavement on the secondary pressure of the double-drainage asphalt pavement is not considered in the study of the a

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  • Double-layer drainage asphalt pavement pore structure attenuation law analysis method

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[0014] The invention provides a method for analyzing the attenuation law of the pore structure of the double-layer drainage asphalt pavement, and the specific implementation steps are as follows:

[0015] (1) Porous asphalt mixture (PA)-20 and PA-13 are used for the gradation of the asphalt mixture on the double-layer drainage asphalt pavement and the lower layer, respectively. Based on the discrete element method, the aggregate composition models of the two gradations are established. PA- 20 Only consider aggregate particles with a particle size of 20mm, 16mm, 13.2mm, 9.5mm and 4.75mm, PA-13 gradation only considers aggregate particles with a particle size of 13.2mm, 9.5mm and 4.75mm, set PA-20 Young's modulus, coefficient of restitution, and bonding radius of two graded aggregates, PA-13, are automatically calculated using discrete element software for particle mass and density;

[0016] (2) Use computer-aided design (CAD) software to establish a geometry whose length, width...

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Abstract

The invention provides a double-layer drainage asphalt pavement pore structure attenuation law analysis method, belongs to the technical field of drainage asphalt pavements, and solves the problems that the secondary compaction of the double-layer drainage asphalt pavement by running wheel loads and upper and lower drainage asphalt structural layers of the double-layer drainage asphalt pavement are not considered after dust particle deposition in the existing double-layer drainage asphalt pavement pore attenuation research. A particle bed layer is generated by using discrete element software to serve as a double-layer drainage asphalt pavement combination model, then bonds are generated among aggregate particles to form bonding strength to serve as the double-layer drainage asphalt pavement combination model, kinematics setting is added to a wheel model, and finally, the attenuation law of the pore structure of the double-layer drainage asphalt pavement is explored through calculationin a DEM-MBD coupling mode. The method can be used for effectively analyzing the attenuation law of the pore structures of the upper and lower layers of the double-layer drainage asphalt pavement andthe influence of secondary compaction after the running wheel load acts on different amounts of deposited dust, and has important practical significance.

Description

technical field [0001] The invention relates to a method for analyzing the attenuation law of the pore structure of a double-layer drainage asphalt pavement, which belongs to the technical field of drainage asphalt pavement. Background technique [0002] Since the Shanghai-Jiajia Expressway was completed and opened to traffic in 1988, it ended the history of no expressways in mainland my country, and also opened the most magnificent page in the history of my country's highway construction. In the next 30 years, my country's highway construction has been in the climax of rapid development, that is, the scale of investment in highway construction in the whole society has continued to increase, and it has remained at more than 100 billion yuan for many years. In recent years, asphalt pavement has been widely used in various grades of highways in my country due to its advantages of high surface smoothness, seamless surface, good driving comfort, short construction period, conven...

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Application Information

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IPC IPC(8): G06F30/13E01C11/22G06F119/14
CPCE01C11/226G06F30/13G06F2119/14
Inventor 许涛许杰孔成维
Owner NANJING FORESTRY UNIV
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