Asphalt mixture rut monitoring device and method

Abstract

The invention discloses an asphalt mixture rut monitoring device and method, and belongs to the field of stress and strain monitoring of pavement structure, which can solve the problems that the existing rutting tests are huge in workload, and the variability of the test results are large. The invention includes: a rutting test piece, a rutting tester, four surface-adhesive FBG sensors, a fiber grating demodulator and a monitoring terminal. The invention uses three FBG strain sensors and one FBG temperature sensor to measure a strain time history curve including creep deformation of the rutting test piece structure surface under the rutting condition by using the characteristic that the FBG sensitively capture structure strain; the ability of the internal particle combination structure ofthe asphalt mixture to diffuse the wheel load at a high temperature is researched, and the development process of the asphalt mixture rutting is revealed from the angle of the lateral strain on both sides of the structure surface rather than the longitudinal depth of the gutters. The mechanical parameters extracted from the strain deformation curve are combined to give evaluation of the anti-rutting performance of the asphalt mixture.

Description

technical field [0001] The invention belongs to the field of stress and strain monitoring of pavement structures, and in particular relates to an asphalt mixture rutting monitoring device and method. Background technique [0002] Rutting is the cumulative permanent deformation of asphalt pavement under repeated traffic loads, and is one of the main failure forms of asphalt pavement. After the occurrence of road rutting, it will have great damage and impact on the service performance of the road surface, and seriously affect the safety of high-speed driving. How to prevent rutting and improve the economic and social benefits of highway construction is the primary problem that road practitioners in our country need to solve. Therefore, it is necessary to strengthen the research on rutting problems. [0003] Traditional rutting test methods include ruler measurement method, leveling method, surface height meter method, etc. These traditional test methods have a huge workload, ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an asphalt mixture rutting monitoring device and method, combined with FBG (Fiber Bragg Grating) technology to solve the existing rutting test workload is huge, the test results are highly variable, and cannot reflect the internal structure of asphalt mixture under high temperature conditions The problem of lateral flow deformation and instability caused by the indirect repeated action of wheel load

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