The Application Of Polymer Grouting Technology In Expressway Maintenance Engineering

At present, expressway in China is in rapid development period, with the increase service time and expressway mileage, expressway maintenance engineering becomes more and more. Maintenance engineering including pertinence maintenance and preventive maintenance.According to the type of diseases, pertinence maintenance is taking appropriate measures to improve the pavement performance when pavement is broken. And preventive maintenance is taking technical measures like micro surface, ultra-thin wearing layer, fog seal and crack grouting to protect the pavement. This can Improve the functional status of the pavement and prevent the development of small diseases and delay the serious damage without the increase of structure bearing capacity. Polymer grouting technology is a new road maintenance technology, and it is quickly harmless and economical to repair pavement.In the light of the asphalt pavement expressway maintenance project, based on the asphalt pavement roads with polymer grouting technology of south He-xu expressway and Ma-chao expressway, this paper deeply discusses the application of polymer grouting technology in maintenance project. This paper research contents include the following six aspects:pavement diseases and repairing technology research, performance test of polymer grouting material, polymer grouting technology layout scheme and effect evaluation, the grouting section road survey, investigation and analysis of engineering application result, Mechanical analysis of polymer grouting road structure.This paper research achievements include the long-term effect of polymer grouting technology, the applicable conditions of the polymer grouting technology, testing standards of asphalt pavement after grouting. The research results provide the technical foundation for the large-scale application of polymer grouting technology.