Method and device for non-destructive testing of pavement quality by radar

Abstract

The invention provides a method and a device for non-destructive testing of pavement quality by a radar. The method comprises the following steps of (1) determining a dielectric coefficient of a pavement through a full reflection method; (2) determining a number of the factor in a corresponding void ratio range; (3) creating an FDTD model of a steel bridge pavement, and performing comparative analysis on the FDTD model and a waveform chart of actual pavement radar reflection wave; (4) detecting a slide and emptying part of the steel bridge pavement; and (5) making control measures for qualityproblems such as pavement thickness, compactness, bottom slip and emptying. The method measures thickness of the steel bridge pavement scientifically according to pavement radar, determines an impactfactor mu of a corresponding shape according to different void ratio ranges, so as to improve measurement accuracy of compactness, and realizes non-destructive test of cracks of the steel bridge pavement and bottom slip and emptying disease. The device for non-destructive testing of pavement quality by a radar is convenient to install a bottom inspection radar and an operation table, and facilitates data detection.

Description

technical field [0001] The invention relates to the field of steel bridge pavement detection, in particular to a method and equipment for radar non-destructive detection of road surface quality. Background technique [0002] Steel bridge deck pavement is different from general road asphalt concrete pavement. It is directly laid on the deck of orthotropic steel bridge. Due to the large flexibility of the deck of orthotropic steel bridge, under the load of heavy vehicles, the The local deformation of the face plate is large and complex, and there are obvious stress concentrations at the joints between the stiffeners and the steel bridge plate and the connection between the diaphragm and the steel bridge plate, which leads to complex and harsh stress on the pavement layer, resulting in various Vertical and horizontal cracks, after the cracks penetrate, surface water enters the interior of the pavement layer, resulting in the failure of the interlayer cohesive force, causing the...

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Problems solved by technology

In severe cases, water causes corrosion of steel box girders, resulting in structural damage to bridges, leading to major safety accidents

At the same time, the pavement layer of the steel bridge cannot be fully rolled by a road roller like the asphalt pavement of ordinary highways, so the thickness and compaction of the pavement layer cannot be fully guaranteed. The compactness of the pavement layer is insufficient and the strength is too low. Water damage and rutting are prone to occur under climatic conditions; therefore, the detection of physical indicators during the construction of the steel bridge pavement and the detection of diseases during operation is particularly important; at the same time, if the bottom-penetrating radar is better equipped, it will also play a key role in the measurement

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