Method for designing long-life composite pavement structure of underground road

A composite pavement and structural design technology, applied in the direction of roads, roads, and on-site coagulation pavements

Inactive Publication Date: 2013-04-10
TIANJIN MUNICIPAL ENG DESIGN & RES INST
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Problems solved by technology

At present, there is no report on the design method of long-life composite pavement structure for urban underground roads

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  • Method for designing long-life composite pavement structure of underground road
  • Method for designing long-life composite pavement structure of underground road
  • Method for designing long-life composite pavement structure of underground road

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Embodiment Construction

[0079] 1 Design principles and requirements

[0080] When designing pavement structure combination, factors such as road grade, traffic volume and its composition, asphalt variety and quality should be considered comprehensively. The principles of the following aspects should be considered in the design of structural combination:

[0081] (1) The grade of the underground road and the degree of heavy traffic;

[0082] (2) The functions of the structural layer meet the relevant requirements;

[0083] (3) Adapt to the load stress distribution characteristics of the structural layer;

[0084] (4) The structural characteristics of each structural layer should be considered;

[0085] (5) Consider the adverse effects of local hydrological conditions on the structure;

[0086] (6) Consider the smooth drainage and channeling of surface water and free water inside the structural layer.

[0087] Using the shear stress at the bottom of the AC asphalt layer, the maximum tensile strain...

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Abstract

The invention relates to a method for designing a long-life composite pavement structure of an underground road. In order to provide the method for designing the long-life composite pavement structure of the underground road and achieve the purpose, a technical scheme adopted in the invention is as follows: the method for designing the long-life composite pavement structure of the underground road comprises the following steps: (1) searching and analyzing traffic parameters, determining traffic grade of the road and figuring out a cumulative action number of a standard axle load within a design reference period; (2) initially drafting a pavement structure, preliminarily drawing up structural parameters such as the thickness of an asphalt concrete (short for AC) layer and the thickness of a continuously reinforced concrete (short for CRC) plate according to a traffic quantity calculating result; (3) figuring out shearing strength and tensile strain at the bottom of the AC layer according to the structural parameters of the pavement structure and comparing and analyzing the shearing strength and the tensile strain of the AC layer with allowed shearing strength and allowed tensile strain; and (4) figuring out load fatigue stress at the bottom of the CRC plate and checking whether the parameter of the CRC plate satisfy design requirements or not. The method is mainly applied to road design.

Description

technical field [0001] The invention belongs to the technical field of road design, and in particular relates to a long-life compound pavement structure design method for underground roads. Background technique [0002] With the development of my country's economy, major cities have built underground roads one after another. However, due to various reasons, the pavement structure of underground roads, which is an important part of underground roads, has not received enough attention. It is directly given by experience and has not been subject to special research, so some underground roads adopt the same long-life pavement structure form of underground roads in spite of different regions, different climate conditions, and different driving conditions. The result of this is that the design of long-life composite pavement of some underground roads is too conservative, resulting in a waste of resources, or the design standards are insufficient and the underground road pavement is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C1/00E01C7/32
Inventor 王晓华王海燕邢锦马士宾娄中波郑利赵巍申婵
Owner TIANJIN MUNICIPAL ENG DESIGN & RES INST
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