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A method for predicting the occurrence time of unstable rutting on asphalt pavement

A technology of asphalt pavement and prediction method, which is applied in the direction of instruments, electrical digital data processing, material inspection products, etc., and can solve problems such as endangering driving safety, affecting road surface smoothness, driving comfort, reducing surface layer and overall strength of pavement structure, etc. , to achieve the effect of simplified method, convenient operation and simple test conditions

Active Publication Date: 2020-08-04
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

The generation of rutting will affect the smoothness of the road surface and driving comfort, reduce the overall strength of the surface layer and the road surface structure, and also seriously endanger the driving safety

Method used

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  • A method for predicting the occurrence time of unstable rutting on asphalt pavement
  • A method for predicting the occurrence time of unstable rutting on asphalt pavement
  • A method for predicting the occurrence time of unstable rutting on asphalt pavement

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Embodiment Construction

[0031] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0032] Traditional pavement rutting studies mostly focus on the development and prediction of its depth. From the perspective of the three stages of asphalt mixture creep development, the rutting depth will increase rapidly in the third stage. The instability of the material under shearing, so the present invention mainly focuses on the prediction of the occurrence time of the instability point.

[0033] 1. Determination of the shear strength parameter prediction model

[0034] The present invention uses the unconfined compressive strength test and triaxial compression test combined with the Mohr-Coulomb theory to measure the shear strength parameters of the asphalt mixture at different temperatures, and then obtains the shear strength parameters by analysis and fitting. Temperature-dependent predictive models.

[0035] 1.1 Unconfined compressive ...

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Abstract

The invention discloses a method for predicting generation time of instability type ruts on bituminous pavement, relates to a method for determining or analyzing materials by means of determination ofchemical or physical properties of materials, and belongs to the technical field of road engineering. Load effect frequency corresponding to a start point of a third phase of an asphalt mixture creeptest is an instability life, by means of an indoor simple performance test, a prediction model of indoor asphalt concrete test piece uniaxial and triaxial dynamic creep test instability life in a test temperature range is obtained, only a certain temperature and a stress state are provided, the indoor mixture test piece creep third phase start point can be directly predicated, and finally a finite element analytical method is used for obtaining a stress state of a real pavement model under a standard axle load effect and obtaining instability life of a real pavement by combining real ambienttemperature and traffic volume condition; a feasible scheme with simple test condition and operation convenience is provided for predicting real pavement rut instability life.

Description

technical field [0001] The invention discloses a method for predicting the occurrence time of asphalt pavement instability type rutting, relates to a method for testing or analyzing materials by means of measuring chemical or physical properties of materials, and belongs to the technical field of road engineering. Background technique [0002] With the comprehensive influence of traffic volume increase, axle load increase, traffic channelization and continuous high temperature weather, rutting has become one of the main diseases of asphalt pavement in my country. According to past experience, rutting is prone to appear in areas such as urban roads and arterial road intersections, expressway sections with severe traffic channelization, and uphill sections of expressways. The generation of rutting will affect the smoothness of the road surface and driving comfort, reduce the overall strength of the surface layer and pavement structure, and also seriously endanger the driving s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/42G06F119/14
CPCG01N33/42G06F30/367
Inventor 顾兴宇吕俊秀张小元邹晓勇
Owner SOUTHEAST UNIV
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