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Semi-rigid base asphalt pavement structure and design method thereof

A technology of semi-rigid base and asphalt pavement, which can be applied to cohesive pavement, roads, roads and other directions paved on site, and can solve the problems that the base material does not meet the requirements of the specification, the service life is long, and the thickness of the asphalt layer does not meet the specification Requirements and other issues to achieve the effect of reducing thickness, simplifying design methods, and reducing costs

Inactive Publication Date: 2014-11-12
李凤云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the applicant found that the base material of some road sections did not meet the requirements of the specification, and even the thickness of the asphalt layer did not meet the requirements of the specification, and its actual service life was longer

Method used

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  • Semi-rigid base asphalt pavement structure and design method thereof
  • Semi-rigid base asphalt pavement structure and design method thereof
  • Semi-rigid base asphalt pavement structure and design method thereof

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with embodiment.

[0024] 1. First, determine the asphalt surface material and thickness according to the following table according to the design life, cumulative standard equivalent axle times and road grade:

[0025]

[0026]

[0027] 2. Determine the material of the semi-rigid base. For the base using lime soil with a plastic index of 5-14 soil, select the thickness of the base according to the above table according to the road grade;

[0028] 3. For other semi-rigid material bases, measure the deflection basin area value of the 5-14 soil lime soil base under the same thickness and the deflection basin area value of the selected semi-rigid material base, and calculate the 5-14 soil lime soil base The deflection basin area value / the deflection basin area value of the selected semi-rigid material base to obtain the proportional coefficient t, and calculate the thickness of the semi-rigid base ac...

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Abstract

The invention relates to a semi-rigid base asphalt pavement structure and a design method thereof. The pavement structure comprises an asphalt surface layer and a semi-rigid material base layer, wherein the materials and thickness of the asphalt surface layer are determined according to the designed life and cumulative standard equivalent axle loads of a road and the quality classification of the road: for a limestone soil base layer with a plasticity index of 5-14 cubic meters, the thickness of the base layer is selected according to the quality classification of the road; and for another semi-rigid material base layer, the deflection basin area value of a limestone soil base layer with a plasticity index of 5-14 cubic meters and the deflection basin area value of a selected semi-rigid material base layer under the condition of same thickness are determined, the ratio of the deflection basin area value of the limestone soil base layer with a plasticity index of 5-14 cubic meters to the deflection basin area value of the selected semi-rigid material base layer is t, and then the thickness of the base layer is calculated according to the ratio t. Through combining with strength of materials and the area of stress dispersion, the semi-rigid base asphalt pavement structure and design method thereof disclosed by the invention are more scientific and reasonable, so that the cost of a road is reduced, and the service life of the road is prolonged.

Description

technical field [0001] The invention relates to the field of road construction, in particular to the field of road construction. Background technique [0002] For a long time, the structural design specifications for semi-rigid base asphalt pavement in my country have been "Code for Design of Highway Flexible Pavement" and "Code for Design of Highway Asphalt Pavement". According to this specification, the pavement grade and surface layer type of semi-rigid base asphalt pavement should be determined according to factors such as road grade and service requirements, cumulative equivalent axle times of standard axle loads within the design period, road construction materials, and construction machinery and equipment. The design traffic volume of the road surface is based on the initial traffic volume and considers the estimated traffic volume within a certain design period to calculate the cumulative standard equivalent axis times. Therefore, the design period is a base period f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/18
Inventor 李凤云
Owner 李凤云
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