Determination method of optimal surface layer thickness combination of asphalt pavement based on gray relational analysis method

An asphalt pavement, gray-related technology, applied to the coagulation pavement, roads, roads and other directions paved on site, can solve the problems of reducing the service life of the asphalt pavement and affecting the quality of the asphalt pavement, and achieve the effect of prolonging the service life and reducing cracking.

Active Publication Date: 2021-08-17
YANGZHOU UNIV
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Problems solved by technology

In view of the inherent characteristics of the semi-rigid base material itself, it is almost inevitable that the asphalt pavement with a semi-rigid base will cause reflective cracks in the cracking of the stable base of the inorganic binder due to the excessive tensile stress at the bottom of the inorganic binder layer during use, thereby affecting The quality of asphalt pavement reduces the service life of asphalt pavement

Method used

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  • Determination method of optimal surface layer thickness combination of asphalt pavement based on gray relational analysis method
  • Determination method of optimal surface layer thickness combination of asphalt pavement based on gray relational analysis method
  • Determination method of optimal surface layer thickness combination of asphalt pavement based on gray relational analysis method

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Embodiment 1

[0062] Step 1, according to the combination of different thicknesses of the existing asphalt pavement surface layer, the thickness of the existing inorganic binder class stable base asphalt pavement is divided into m groups:

[0063] For domestic high-speed pavement structures, a number of highway pavement structure types have been collected. Most of the asphalt pavement surface layers of inorganic binder stabilized bases adopt a three-layer structure, so the following six commonly used inorganic binder stabilized base asphalts are proposed Pavement Surface Thickness Combination:

[0064] The first group (structure a1): 3cm+5cm+7cm, the second group (structure a2): 4cm+6cm+8cm, the third group (structure a3): 4cm+10cm+7cm, the fourth group (structure a4): 4cm+10cm+10cm, the fifth group (structure a5):

[0065] 4cm+10cm+13cm, the sixth group (structure a6): 4cm+10cm+16cm.

[0066] Among them, 36cm of cement-stabilized crushed stone is uniformly used for the base, 20cm of fly ...

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Abstract

The invention discloses a method for designing the optimal surface layer thickness combination of asphalt pavement based on the gray correlation analysis method. Different combinations; secondly, the finite element analysis of the asphalt pavement surface layer is carried out, based on ABAQUS modeling, the maximum shear stress, the maximum tensile strain at the bottom of the asphalt pavement layer, and the maximum inorganic binder The tensile stress at the bottom of each layer and the maximum vertical compressive strain at the top of the subgrade; finally, the gray correlation analysis method is used to comprehensively analyze and compare various control indicators. The optimal surface layer thickness combination of the inorganic binder stabilized base asphalt pavement is obtained by sorting the combination structures; it solves the problem that the control index changes of various pavement structures are complicated and difficult to select the optimal structure.

Description

technical field [0001] The invention belongs to the technical field of highway pavement design, in particular to a method for determining the optimum surface layer thickness combination of asphalt pavement based on a gray relational analysis method. Background technique [0002] With the rapid development of my country's economy, the number of road transport vehicles is increasing day by day, and the problem of pavement structure damage is becoming more and more serious. It is urgent to continuously innovate pavement design methods to promote the sustainable development of pavement structures and improve the design period and service life of pavement structures to adapt to future technologies. need. [0003] At present, the asphalt concrete pavement structure of inorganic binder stable base is widely used in our country. stability characteristics. And the resulting reflective cracks in the asphalt pavement. [0004] Among the high-grade highways that have been built and op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/00G16C60/00E01C7/18G06F111/10
CPCE01C7/18G06F30/00G06F2111/10
Inventor 康爱红陆鹏程夏炎陆垚锋潘晓慧
Owner YANGZHOU UNIV
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