In the face of the demand for long-life expressway construction projects in China,the basic concepts and development histories of long-life asphalt pavements in China,the United States,and European countries were introduced.The research and development status of long-life asphalt pavement design theories and methods in China and European and American countries were summarized.The existing detection and evaluation for asphalt pavements and life extension treatment design methods in European and American countries were combed.The research and development status of life extension design methods for typical existing asphalt pavements in China were discussed.The advantages,disadvantages,and applicabilities of different long-life design methods for newly constructed roads and life extension design methods for existing asphalt pavements were compared and analyzed.Research results indicate that the unified design standard for long-life asphalt pavements is not formed at present.The research and application are still in the stage of development and improvement.Long-life asphalt pavements will still be a hot topic in the field of pavement research in the future.The coupling of traffic and environmental factors to establish a multi-index controlled long-life asphalt pavement design system should be a key research direction in the future.The long-life asphalt pavement structure design will shift towards nonlinear,multidimensional,probabilistic,and dynamic in the future.The life extension design method for long-life asphalt pavements based on the progressively increasing life of structural layers doubles the service life of asphalt pavement structures.The relevant work can provide valuable reference and insight for constructing and applying the life extension design methods and systems for existing asphalt pavements,so as to meet the development needs of long-life highway construction projects in China.The life extension design of existing asphalt pavements is an important subject for the sustainable development of road engineering.In the future,it is necessary to strengthen the research and promotion of long-life asphalt pavement technology,improve the comprehensive quality of pavements,meet the growing demand for road transportation,and make greater contributions to the construction of high-quality,efficient,green,and safe transportation infrastructure.18 tabs,7 figs,63 refs.
维普
万方数据
