Method for determining optimum maintenance opportunities of pavements on basis of pavement performance models before and after maintenance

Abstract

The invention discloses a method for determining optimum maintenance opportunities of pavements on basis of pavement performance models before and after maintenance. The method comprises the followingsteps of: determining two pavement performance decay models before and after maintenance according to performance detection indexes of a practical pavement maintenance project over the years, whereinthe performance detection indexes over the years comprise a flatness index IRI, a track depth RD and the like; establishing relationship between parameters of the two models, predicting a pavement performance model after the maintenance by using a pavement performance model before the maintenance, defining a maintenance benefit as enveloping areas between performance curves before and after the maintenance and a maintenance threshold value, and expressing the enveloping areas by functions of the parameters of the performance model before the maintenance; and finally, determining a value of acorresponding parameter when the maintenance benefit is the maximum so as to determine an optimum maintenance opportunity and providing important basis for road maintenance and management decisions. When the method is used for determining the optimum maintenance opportunity, an analysis period does not need to be determined in advance, so that the method has wide applicability.

Description

technical field [0001] The invention relates to a highway management and decision-making technology, in particular to a method for determining the best maintenance time of the road surface. Background technique [0002] In order to ensure the safety, functionality and structure of the road, it is necessary to carry out timely maintenance on the road. Different from pavement reconstruction, pavement maintenance is carried out before a large number of diseases appear, and generally can effectively delay the decline of pavement performance and restore pavement functions. Studies have shown that every dollar spent on pavement maintenance can save $6 to $10 in subsequent pavement reconstruction. Therefore, formulating an effective maintenance plan is an important task of the highway maintenance management department, and the key to highway maintenance management decision-making is to choose a reasonable maintenance method and timing. [0003] The concept of optimal maintenance ...

AI Technical Summary

Problems solved by technology

In the past, when determining the timing of maintenance by maximizing the maintenance benefits, in order to ensure that the maximum value can appear before the pavement performance reaches the maintenance threshold, it is often necessary to determine the analysis period in advance. Due to the large differences in the analysis periods corresponding to different expressways and different maintenance methods and Difficult to determine, a large amount of actual observation data have shown that the later the pavement maintenance time is, the worse the maintenance benefit will be

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