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Asphalt pavement thickness dynamic adjustment method based on three-dimensional ground penetrating radar

A ground-penetrating radar and asphalt pavement technology, applied in the field of three-dimensional ground-penetrating radar detection, can solve the problems of low accuracy of detection results, inconvenient operation, heavy workload, etc., and achieve the effects of improving detection accuracy, improving efficiency, and saving manpower

Pending Publication Date: 2022-04-26
HARBIN INST OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of inconvenient operation and heavy workload in manual real-time inspection of paving thickness, as well as the problems of low accuracy and poor representativeness of detection results

Method used

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  • Asphalt pavement thickness dynamic adjustment method based on three-dimensional ground penetrating radar
  • Asphalt pavement thickness dynamic adjustment method based on three-dimensional ground penetrating radar
  • Asphalt pavement thickness dynamic adjustment method based on three-dimensional ground penetrating radar

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specific Embodiment approach 1

[0038] Specific implementation mode one: combine figure 1 To describe this embodiment,

[0039] A method for dynamically adjusting the thickness of an asphalt pavement based on a three-dimensional ground penetrating radar described in this embodiment includes the following steps:

[0040] Step 1: Carry out 3D ground penetrating radar selection, installation, and preparation work. In this embodiment, frequency stepping radar is used; after the preparation is completed, radar nondestructive testing is carried out on the asphalt layer under the asphalt pavement to be detected, that is, the 3D ground penetrating radar system is used to collect road data. A full-section three-dimensional data lattice, that is, three-dimensional ground-penetrating radar data; the data of the three latitudes are: the driving direction is the x-axis, the depth direction is the longitudinal section data of the z-axis; the direction perpendicular to the driving direction is the y-axis, and the depth dir...

Embodiment

[0061] The design of a new expressway requires the allowable deviation of the representative value of the total thickness of the asphalt layer to be 0.9cm, that is, greater than 17.1cm; After the construction of the middle surface layer of this project is completed, it is planned to adjust the construction thickness of the upper layer, and the loose paving coefficient of the mixture paving of the upper layer is 1.24.

[0062] Before and after the paving of the upper layer, three-dimensional ground penetrating radar is used to detect the thickness of the asphalt layer on the right section of K0+000~K5+000, with a total length of 6km. Adopt the dynamic adjustment technology of construction thickness to adjust the construction thickness of the upper layer. The length of the road section is 6km, which is divided into 30 sections, numbered 1-30. Taking the calculation of one of the units as an example, the calculation results are as follows:

[0063]

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Abstract

The invention discloses an asphalt pavement thickness dynamic adjustment method based on a three-dimensional ground penetrating radar, and belongs to the technical field of three-dimensional ground penetrating radar detection. The problems that manual real-time detection of the paving thickness is inconvenient to operate and large in workload, and the detection result is low in accuracy and poor in representativeness are solved. The method comprises the following steps: firstly, collecting three-dimensional ground penetrating radar data, identifying and tracking a lower asphalt surface continuous signal and an asphalt layer bottom continuous signal in a radar image, and calculating to obtain an asphalt pavement thickness data set; then dividing the asphalt pavement into paving adjustment units, and calculating a thickness mean value of each unit; and respectively calculating a thickness compensation value required by a thickness representative value and a thickness compensation value required by a thickness minimum value based on a lower-layer asphalt layer thickness design value and a lower-layer asphalt layer thickness minimum value, determining an upper-layer asphalt layer thickness adjustment value in combination with an upper-layer asphalt layer thickness design value, and further determining an upper-layer paving thickness adjustment value of the unit. The method is used for dynamically adjusting the thickness of the asphalt pavement.

Description

Technical field: [0001] The invention belongs to the technical field of three-dimensional ground-penetrating radar detection, and in particular relates to a method for dynamically adjusting the thickness of asphalt pavement based on three-dimensional ground-penetrating radar. Background technique: [0002] Asphalt pavement thickness is one of the most important indicators for engineering quality control and maintenance. Whether the thickness of new asphalt pavement or overlay reaches the design thickness is the basis of construction quality evaluation; the index of asphalt pavement surface layer is also the most important step in calculating the modulus of road structural layer, which greatly affects the service life of asphalt pavement. [0003] When paving asphalt on a new asphalt pavement, due to factors such as poor flatness of the top surface of the base and poor adjustment of paving equipment during construction, it is easy to have a high proportion of areas with insuf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01B15/02E01C23/01
CPCG01S13/885G01B15/02E01C23/01
Inventor 李鹏飞胡观峰王大为陶洁璇王东旭洪斌吕浩天
Owner HARBIN INST OF TECH
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