Abstract
In order to determine the key content of preventive maintenance of the cement concrete pavement in military airports in the seasonal frozen area, the relationship among pavement diseases is analyzed in this paper, and the degree of impact of each disease on pavement damage is quantified. Based on the survey data of 36 sample airports in 12 provinces, such as Hebei, Shandong, and Liaoning, a questionnaire covering many disease variables affecting pavement damage was designed. The exploratory factor analysis method and structural equation model (SEM) were used to analyze the interaction among joint disease, surface disease, vertical disease, repair disease, and fracture disease. And the influence degree of each disease on pavement damage was quantified as well. The research results show that the questionnaire has good reliability and validity and is suitable for confirmatory factor analysis. The SEM fits well with the observed data and meets the adaptation standard. Joint disease, surface disease, and vertical disease all have significant positive direct impact on pavement damage. Moreover, joint disease and surface disease can also indirectly affect pavement damage. The effects of surface disease (0.327), vertical disease (0.283), and joint disease (0.219) on pavement damage decrease in turn. Surface diseases have the greatest impact on pavement damage, which are the critical diseases to accelerate the pavement damage. By strengthening the prevention and control of surface diseases and delaying the conversion process of other diseases to surface diseases, the service life of the pavement can be greatly improved, and the maintenance cost can be reduced.
Highlights
Airport pavement is the most basic and important facility for aircraft flight
In order to ensure the professionalism and effectiveness of the collected questionnaire data, 60% of the total respondents are technical personnel, who engaged in pavement maintenance, and they have more than 5 years of work experience. e administrative leadership of the pavement maintenance department accounts for 20%, and they are familiar with the pavement conditions of the airport
According to the pavement disease data of 36 military airports in the seasonal frozen area collected by our survey, as well as the relevant literature at present, we find the characteristics of the deterioration mechanism of cement concrete pavement diseases, which are as follows: first slow fast, from surface to interior, from nonstructural diseases such as joint diseases and surface diseases, and to structural diseases such as vertical diseases and fracture diseases
Summary
Airport pavement is the most basic and important facility for aircraft flight. Whether it is a runway, taxiway, or apron, it assumes important tasks such as aircraft take-off, taxiing, and parking and is the basic platform for aircraft transportation and combat functions to be fully utilized. Pavement preventive maintenance refers to the reasonable and planned maintenance measures taken for the existing pavement system in good condition, so as to delay the attenuation of pavement performance and reduce maintenance cost [2, 3]. At present, it has been widely used in the highway asphalt pavement and has achieved good practical results. Erefore, it is of great practical significance to carry out research on preventive maintenance of the cement concrete pavement in military airports and promote the application of the concept of preventive maintenance in the pavement maintenance of our military airport. It is the basis of preventive maintenance research to accurately understand the relationship among the diseases of the cement concrete pavement and analyze the types of the diseases and the interaction mechanism among the diseases
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