Long-term real-time monitoring system for asphalt pavement structure information based on optical fiber Bragg grating sensor

Abstract

The invention discloses a long-term real-time monitoring system for asphalt pavement structure information based on an optical fiber Bragg grating sensor and relates to a long-term real-time monitoring system for the asphalt pavement structure information. The long-term real-time monitoring system meets the requirement of long-term real-time monitoring of the asphalt pavement structure information. Various data of the asphalt pavement are acquired by adopting A transverse strain sensors, B longitudinal strain sensors, C temperature sensors, D earth pressure gauges, E single point extensometers, F vertical strain sensors, G humidity sensors, a dynamic weighing sensor and a shaft position sensor and are processed by a server, and thus the long-term real-time monitoring on the asphalt pavement structure information is realized. The long-term real-time monitoring system disclosed by the invention is suitable for long-term real-time monitoring of the asphalt pavement structure information.

Description

technical field [0001] The invention relates to a long-term real-time monitoring system for asphalt pavement structure information. Background technique [0002] In recent years, with the rapid development of the national economy and the new changes in the characteristics of current vehicle transportation, some high-grade highways that have been built have suffered serious early damage to the road surface within 1-2 years of opening to traffic, which reduces the quality of the road surface and shortens the service life of the road. The service life of the road surface and the maintenance work generated also indirectly increase the cost of road construction. Over the years, although researchers have made a lot of explorations on the long-life of asphalt pavement and achieved certain results, the traditional pavement monitoring methods cannot obtain the real force status of the pavement under the complex coupling of loads and vehicles. Systematic research on the performance o...

AI Technical Summary

Problems solved by technology

However, due to its long-term exposure to various complex environmental conditions such as high and low temperature, rain, freeze-thaw, and ultraviolet rays during use, as well as the repeated action of driving dynamic loads, this makes the asphalt pavement produce such things as rutting, wrapping, and shifting. , fatigue cracking and other damage, the asphalt mixture used to pave asphalt pavement is also a kind of viscoelastic material, resulting in various damage forms, the reasons are very complicated

For the analysis of the cause of damage, although some of them can be determined by direct observation of surface phenomena, most of the pavement’s diseases are rooted in the interior of the structure and spread from the inside to the outside. It is difficult to judge the real situation inside the pavement based on the surface phenomena

Moreover, even if the cause of some damage can be obtained through observation, the pavement structure has been damaged at this time, and some have even caused irreversible catastrophic accidents, which have bad impact, and it will cost a lot of money to repair the pavement in the later stage

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