Evaluation method for damage condition of bituminous pavement semi-rigid base course

A semi-rigid base and asphalt pavement technology, applied in roads, roads, road repairs, etc., can solve the problems of core drilling damage to road structures, failure to clarify the type, degree, cause of damage, and failure to establish a semi-rigid base. Simplicity, improved detection and evaluation efficiency, and high feasibility

Active Publication Date: 2016-07-27
北京国道通公路设计研究院股份有限公司
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  • Application Information

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Problems solved by technology

[0003] In the prior art, the evaluation of the damage status of the semi-rigid base is mainly to make empirical judgments based on the road surface inspection data and the indoor experimental results of drilling structural core samples. This technology still has many deficiencies, which are mainly reflected in: (1) 1. The concealment of the semi-rigid base of the asphalt pavement makes it impossible to directly observe its damage status. The inspection data of the road surface can only understand the general situation of the damage of the semi-rigid base from experience, and the details such as the type, degree, and cause of the damage cannot be clarified; ( 2) In the indoor experiment results of drilling structural core samples, although the performance attenuation of the semi-rigid base can be understood, a large number of drilled cores have caused certain damage to the road structure, and the number, degree, and degree of damage to the semi-rigid base have not yet been established. Therefore, the indoor experimental results of drilling structural core samples cannot be used as the basis for maintenance and repair decisions

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  • Evaluation method for damage condition of bituminous pavement semi-rigid base course

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Embodiment 1

[0028] This preferred embodiment provides a method for evaluating the damage condition of the semi-rigid base layer of the asphalt pavement. Such as figure 1 As shown, the evaluation method specifically includes the following steps:

[0029] Step S1, detecting the deflection value of the road surface of one section of the asphalt pavement to be tested, preferably, a section with 100m as a calculation unit;

[0030] The specific steps are as follows: firstly, select the road to be built or the road with similar pavement structure and traffic load conditions as the asphalt road to be tested; Shen value, the drop weight deflection meter can detect the deflection value of at least 7 measuring points, and the detection frequency is 1 time when the weight is dropped from 20 to 100 meters.

[0031] Step S2, determining the classification criteria for the damage condition of the semi-rigid base layer of the road section in step S1;

[0032] This step is specifically as follows: def...

Embodiment 2

[0083] This preferred embodiment provides a method for evaluating the damage condition of the semi-rigid base layer of the asphalt pavement. This evaluation method is basically the same as the method of preferred embodiment one, specifically: calculate the semi-rigid base modulus ratio and the damage condition index of one of the road sections of the asphalt pavement to be tested, the semi-rigid base modulus ratio is the semi-rigid base effective modulus and The ratio of the initial modulus of resilience; establish the corresponding relationship between the semi-rigid base modulus ratio of the road section, the damage condition index and the damage condition; obtain the damage condition index and damage characteristics of other sections of the asphalt pavement to be tested through the corresponding relationship.

[0084] The difference is: the method for calculating the semi-rigid base modulus ratio and the damage index of the asphalt pavement to be tested can use the method of...

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Abstract

The invention discloses an evaluation method for the damage condition of a bituminous pavement semi-rigid base course, and belongs to the technical field of road engineering. The evaluation method is designed for solving the problems that an existing evaluation method cannot accurately judge the damage condition of the semi-rigid base course or accurately evaluating the damage type, damage degree and distribution characteristics. The evaluation method for the damage condition of the bituminous pavement semi-rigid base course includes the steps that a semi-rigid base course modulus ratio and damage condition indexes of one road segment of a bituminous pavement to be detected are calculated, wherein the semi-rigid base course modulus ratio is a ratio of semi-rigid base course effective modulus to initial rebound modulus; the corresponding relation among the semi-rigid base course modulus ratio, the damage condition indexes and the damage condition of the road segment is set up; damage condition indexes and damage characteristics of other road segments of the bituminous pavement to be detected are obtained through the corresponding relation. The damage condition of the bituminous pavement semi-rigid base course can be accurately judged through the evaluation method, and the damage type, damage degree and distribution characteristics are accurately evaluated.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a method for evaluating the damage condition of a semi-rigid base layer of an asphalt pavement. Background technique [0002] Before road maintenance and reconstruction, it is necessary to determine the damage status of the semi-rigid base to determine its treatment method. Accurately judging the damage of the semi-rigid base and formulating accurate maintenance and repair countermeasures accordingly have an important impact on the service life and service functions of the road. [0003] In the prior art, the evaluation of the damage status of the semi-rigid base is mainly to make empirical judgments based on the road surface inspection data and the indoor experimental results of drilling structural core samples. This technology still has many deficiencies, which are mainly reflected in: (1) 1. The concealment of the semi-rigid base of the asphalt pavement makes it impos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C23/00
CPCE01C23/00
Inventor 于海臣高小钧刘晓姗朱美蓝李鹏飞
Owner 北京国道通公路设计研究院股份有限公司
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