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Test method and test device for asphalt pavement crack load response relative displacement

A crack load, relative displacement technique

Active Publication Date: 2016-04-27
SHANDONG TRANSPORTATION INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the traditional deflection detection of cracks generally uses the falling weight deflection meter (FWD) for detection, which not only has low test accuracy, but also cannot distinguish the cause of crack formation, development stage, relative displacement of cracks and other information.
Although it is feasible to study the cause and development of cracks through pit exploration, the damage to the pavement is too great. Therefore, it is necessary to study an effective, reliable and efficient crack detection method.

Method used

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  • Test method and test device for asphalt pavement crack load response relative displacement
  • Test method and test device for asphalt pavement crack load response relative displacement
  • Test method and test device for asphalt pavement crack load response relative displacement

Examples

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Embodiment 1

[0032] as attached figure 1 , 2 As shown, the asphalt pavement crack load response relative displacement test device of the present invention is mainly composed of a reference part 1, a sensor positioning part 2, a horizontal linear displacement sensor 3, a vertical linear displacement sensor 4, a controller 5 and a bracket 6. Wherein, the sensor positioning part 2, the horizontal linear displacement sensor 3, the vertical linear displacement sensor 4 and the controller 5 constitute a sensor system.

[0033] The reference member 1 is an "L"-shaped component composed of a vertical plate and a horizontal plate, and the vertical plate and the horizontal plate are perpendicular to each other. The vertical surface and the horizontal surface inside the reference member 1 are smooth and flat, and are used for contacting with the measuring end of the sensor.

[0034] The sensor positioning part 2 is flat, the bracket 6 is fixed on the front end of the sensor positioning part 2, and ...

Embodiment 2

[0039] The specific implementation steps of the load response relative displacement test method for asphalt pavement cracks are as follows:

[0040] (1) Select a straight pavement transverse joint 11, the original pavement structure is as attached image 3 shown;

[0041] (2) Detect and record the surface temperature of the crack road at 25°C;

[0042] (3) Select a relatively straight section of the crack 11, and fix the reference piece 1 of the test device described in Example 1 to one side of the crack 11 by superglue. The fracture measurement section is parallel;

[0043] (4) Fix the sensor system of the test device on the other side of the crack 11 with super glue, make the lower edge of the sensor positioning part 2 parallel to the crack 11 and align with the reference part 1, and the vertical distance from the lower edge to the crack 11 is 1 cm. It is required that the connection line between the sensor positioning part 2 and the reference part 1 is perpendicular to t...

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Abstract

The invention discloses a test method and a test device for asphalt pavement crack load response relative displacement. The test method comprises steps as follows: a, a reference part and a sensor positioning part are arranged on two sides of a to-be-tested crack, and a horizontal linear displacement sensor and a vertical linear displacement sensor are fixedly arranged on the sensor positioning part; b, a test vehicle is stopped in positions of the reference part and the sensor positioning part in Step a; c, the sensors are started, the test vehicle slowly runs forwards and passes by the sensor positioning part and the reference part sequentially, after the test vehicle runs for a proper distance, the sensors are turned off, and the test is finished. The test device comprises the reference part, the sensor positioning part, the horizontal linear displacement sensor, the vertical linear displacement sensor and a controller. Compared with the prior art, the test method and the test device have the advantages that horizontal and vertical relative displacement between two plates of the crack can be measured accurately, and the cause and the development degree of the crack are determined through displacement features.

Description

technical field [0001] The invention relates to an asphalt pavement detection method, in particular to a test method and a test device for the load response relative displacement of cracks in the asphalt pavement. Background technique [0002] Cracks are the main cause of accelerated occurrence and aggravation of various diseases on the pavement. Although the causes and manifestations are not the same. It is undeniable that cracks provide a channel for water to enter, which accelerates the occurrence of diseases such as pumping, potholes, deformation and network cracks, and also seriously affects the stability of the overlay after the overlay is repaired in the middle of the road. It is a key technical issue related to the service life of asphalt pavement to take appropriate treatment measures for cracks in different stages of crack development and avoid their upward development. [0003] In the existing technology, the traditional crack deflection detection generally uses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01B21/02
CPCG01B21/02G01N3/08G01N2203/0037G01N2203/0066
Inventor 董昭韦金城付建村尚光明孙强吴发明
Owner SHANDONG TRANSPORTATION INST
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