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Asphalt pavement rut calculation method considering load frequency

A technology of asphalt pavement and calculation method, which is applied in complex mathematical operations, using stable tension/pressure to test the strength of materials, measuring devices, etc., can solve the problem of not considering the influence of vehicle speed on road rutting, etc., and achieve accurate rutting deformation. Effect

Pending Publication Date: 2021-11-16
SHANDONG JIAOTONG UNIV +1
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Problems solved by technology

However, the existing rutting permanent deformation calculation formula does not consider the influence of vehicle speed on road rutting

Method used

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  • Asphalt pavement rut calculation method considering load frequency
  • Asphalt pavement rut calculation method considering load frequency
  • Asphalt pavement rut calculation method considering load frequency

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] The calculation method for asphalt pavement rutting considering the load frequency of the present invention adopts the following calculation formula to calculate the permanent deformation of the asphalt pavement rutting:

[0041]

[0042]

[0043] Where: R a —Permanent deformation of asphalt mixture layer, unit mm;

[0044] R ai —the amount of permanent deformation of the i-th layer, in mm;

[0045] n—number of layers;

[0046] T pef —Equivalent temperature of permanent deformation of asphalt mixture layer, unit ℃;

[0047] p i —Vertical compressive stress on the top surface of the i-th layer of the asphalt mixture layer, unit MPa;

[0048] N e3 - The cumulative action times of the equivalent design axle load on the design lane during the design service life or the period from the opening to traffic to the first rutting repair;

[...

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Abstract

The invention relates to an asphalt pavement rut calculation method considering load frequency. The method is specifically realized through the following steps of: a) manufacturing a rut plate; b) performing device installation and heat preservation; c) loading a load; d) reading a rut deformation amount; e) repeating the test; f) calculating a regression coefficient; and g) calculating the rut deformation amount. Compared with an existing asphalt pavement rut deformation calculation method, the asphalt pavement rut calculation method considering the load frequency introduces the load frequency f (corresponding to the designed speed of the road) and a regression coefficient a to be measured, and considers the influence of vehicle speed on pavement rut, and therefore, the obtained rut deformation of an asphalt pavement is more accurate, the rut depth of the asphalt pavement in the using process can be predicted, and more accurate reference data can be provided for timely repair and maintenance of the rut of the pavement.

Description

technical field [0001] The invention relates to a calculation method for asphalt pavement rutting, and more specifically, relates to a calculation method for asphalt pavement rutting considering load frequency. Background technique [0002] The rutting calculation model of asphalt pavement given in the latest "Code for Design of Highway Asphalt Pavement" in my country is based on the rutting test under standard conditions to obtain the permanent deformation of each layer of asphalt mixture in the rutting test. It uses the method of calculating the permanent deformation of each layer amount and the total permanent deformation of the asphalt mixture layer. [0003] The design speed of vehicles on different roads is different, and the running speed of vehicles is also different. Different speeds make the frequency of load action on the road surface different when the vehicle is driving on the asphalt road. Due to the rheological properties of asphalt mixture, its deformation la...

Claims

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Application Information

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IPC IPC(8): G01B21/32G01N3/08G01N30/02G06F17/15
CPCG01B21/32G01N3/08G01N3/02G06F17/15G01N2203/0676G01N2203/0682
Inventor 胡朋王琨石磊刘伟
Owner SHANDONG JIAOTONG UNIV
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