Accelerated testing method for temperature field of straight road

Abstract

The invention relates to the technical field of road monitoring and provides an accelerated testing method for a temperature field of a straight road. The accelerated testing method comprises the following steps: determining a testing loading frequency of a road to be evaluated; carrying out fitting on environment temperature of a region of the road to be evaluated, so as to obtain a territorial environment temperature spectrum; determining a ratio of acting time of high temperature and low temperature according to the territorial environment temperature spectrum; calculating an acceleration ratio of the acting temperature field through a WLF equation; determining a loading period of the road to be evaluated according to the acceleration ratio of the temperature field; and determining a loading scheme according to the testing loading frequency, the loading period and the ratio of the acting time of the high temperature and the low temperature, so as to realize accelerated loading of the temperature field. The accelerated testing method provided by the invention is applicable to predication of an accelerated loading service life of the temperature field of the straight road, and a testing period is extremely reduced; and the method is closer to an actual acceleration action mechanism and meets an acceleration rule of road performance under a long-period effect of the temperatureunder a natural state. Furthermore, the predication accuracy of the service life service evaluation of the road is improved.

Description

technical field [0001] The invention relates to the technical field of road monitoring, in particular to an accelerated test method for the temperature field of a straight road. Background technique [0002] The long-term effect of temperature on roads seriously affects the service safety performance of roads: [0003] 1. The road performance of asphalt and asphalt mixture is greatly affected by temperature. In summer high temperature season, asphalt pavement mainly produces rutting disease, and in winter low temperature season, temperature shrinkage cracks occur due to sudden drop in temperature and repeated drop in temperature. Long-term effects lead to fatigue failure. [0004] 2. Another aspect of the influence of temperature on asphalt pavement is the change of soil foundation strength. Subzero water increases the volume of the road soil foundation and causes frost heaving. The water accumulated in the upper layer of the roadbed during the spring dissolution cannot be...

AI Technical Summary

Problems solved by technology

The long-term effect of ultraviolet light in solar radiation causes the aging of asphalt materials, which has a great impact on the dynamic stability of road materials

[0006] The traditional road accelerated loading test method only considers the road load and loading frequency. The accelerated test device is often an open facility, which cannot complete the accelerated simulation of the temperature field, and cannot more realistically simulate the long-term effect of the road in the actual environment.

Therefore, it is impossible to correctly evaluate the life of the road in the actual use environment

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