Improving the method for measuring the longitudinal flatness of road surfaces
https://doi.org/10.52170/1815-9265_2024_69_106
Abstract
The evenness indicator of road surfaces is one of the key indicators when assessing the technical condition of roads, ensuring safety, analyzing the occurrence of defects and forecasting the technical condition. At least ten different ways to determine the evenness indicator exist. The amplitude method is one of the most highly accurate; it is based on geometric leveling with a leveling step of 5 m. The method, with all its advantages, has disadvantages; one of the main ones is the fixed length of the path segment (5 m) on which the amplitude of the unevenness is determined. All uneven lengths less than 5 m are estimated unreliably, which leads to errors in assessing the quality of road surfaces. The complexity of measurements increases many times as the leveling step decreases. The use of laser scanners and other Global Navigation Satellite System-based measuring systems does not ensure measurement accuracy. Measurement systems based on measuring the inclination angles of a moving object using inclinometers, accelerometers, gyroscopic systems, including inertial systems, are affected by linear accelerations, which affects the accuracy of measurements.
The essence of the proposed solutions is to measure slopes without using continuous correction of the spatial position of the gyroscope axis relative to the horizon. An improved method, which is based on measuring the longitudinal angle of inclination of a moving object (undercarriage), the distance traveled and calculating elevations by integrating data, is implemented on the basis of the Universal Decimal Classification Evenness. This method allows you to determine the unevenness of road surfaces with an accuracy of about 1 mm, repeatability from different measurement cycles is within 1 mm.
About the Authors
V. V. Shcherbakov
Siberian Transport University
Russian Federation
Russian Federation
Vladimir V. Shcherbakov – Professor of the Engineering Geodesy Department, Doctor of Engineering
Novosibirsk
S. S. Akimov
Siberian Transport University
Russian Federation
Russian Federation
Sergey S. Akimov – process engineer of the Diagnostics of Road Surfaces and Subgrade Research Laboratory
Novosibirsk
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Review
For citations:
Shcherbakov V.V., Akimov S.S. Improving the method for measuring the longitudinal flatness of road surfaces. Bulletin of Siberian State University of Transport. 2024;(2):106-114. (In Russ.) https://doi.org/10.52170/1815-9265_2024_69_106
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