Road surface water seepage performance evaluation method based on key water seepage point identification

Abstract

The invention relates to a pavement water seepage performance evaluation method based on key water seepage point identification. The method comprises the following steps: S1, measuring and acquiring an average water seepage coefficient of an undamaged pavement and key water seepage points on the pavement; S2, detecting and acquiring three-dimensional point cloud data of a road surface; S3, performing digital image processing on the three-dimensional point cloud data, and identifying key water seepage points; S4, calculating parameter information of the identified key water seepage points; and S5, constructing a pavement water seepage performance evaluation model according to the average water seepage coefficient and the parameter information of the key water seepage points, and evaluating the pavement water seepage performance. Compared with the prior art, the method has the advantages that a new information source is introduced for traditional water seepage detection, the risk that an asphalt pavement is damaged by water is relieved, a brand new view angle is provided for preventive maintenance, the existing pavement does not need to be damaged, multiple data points are obtained and collected, the evaluation accuracy is high, environmental constraint is small, daily use can be met, and the overall water seepage performance of the pavement can be better evaluated.

Description

technical field [0001] The invention relates to the field of pavement water seepage performance evaluation, in particular to a pavement water seepage performance evaluation method based on identification of key water seepage points. Background technique [0002] The water permeability of asphalt pavement is one of the important criteria to measure the quality of asphalt pavement, and the pore water inside the pavement is the main cause of early water damage to the pavement. Due to the dynamic water pressure, the water on the road surface is squeezed into the road surface through the pores, and the joint between the asphalt and the aggregate is eroded until the asphalt film is gradually peeled off from the surface of the aggregate, the aggregate begins to loosen, and the bond between the aggregates is lost. The structural strength of the asphalt layer becomes lower, and asphalt migration occurs, resulting in oil flooding, spalling, and even potholes on the road surface. [0...

AI Technical Summary

Problems solved by technology

The water seepage meter test method obtains the water seepage coefficient by measuring the volume of water seepage on the pavement per unit time. However, this method is time-consuming, laborious, inefficient, and easily leads to test failure due to poor sealing. Randomly select three test points for water seepage test and take the average value as the water seepage coefficient index of the whole road section

The CT scanning method estimates the water seepage coefficient by analyzing the relationship between the internal structure of the asphalt mixture and the seepage. However, CT scanning is a destructive test that requires sampling of the pavement, which is time-consuming and laborious and destroys the original pavement structure. It is not suitable for the built pavement. detection

The infrared differential thermal method is affected by factors such as temperature, sunshine, temperature difference, etc., and is greatly constrained by environmental factors, which cannot meet the daily use

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