Engineering Quality Scientific Detection And Preventive Maintenance For Subgrade-Pavement Of Expressway

1988,the first expressway of our country build up,the expressway total mileage attain 53,900 kilometers till the end of 2007,it will continue enlarg expressway construction and reconstruction and extension projects investment, till 2020, the expressway of our country total mileage will attain 70,000 kilometers. 20 years expressway construction and development, expressway "7918" nets formed, more scale, efficient, safe, comfortable.The expressway will quickly develop in Chinaese recent and prospective plan. Immediately, more and more highway diseases will present and result in decreasing of driving safety, increasing of protect maintenance work and interworking of reconstruction and extension problem etc.It is clear that defects detecting technology and maintenance work of disease of expressway are more and more important.In building and traffic-operating period, maximize economic and social benefits, improve expressway management is a urgent matter. In view of scientific detection and preventive maintenance,This paper at the base of quality detection and maintenance present situation, openned disease investigation through Beijing-HongKong-Macau expressway and Yuzhou-Dengfeng expressway.Through analysis of expressway pavement disease, roadbed disease and foundation disease detection technique, formed subgrade and pavement scientific detection technique. Basis of prediction service performance,service performance disintegration,evaluation of diseases the road noodles usage function, usage function the change evaluation contents and the foundation of treatment that the theories harms with regulation, the roadbed road noodles disease up, the first step built up a superhighway disease to harm a prevention to protect a technique.For this, the first step built up the roadbed road noodles disease to harm science examination and prevention to protect GIS management system, convenient the construct and maintenance take care of search and make decision.According to rely on engineering inquisition, examine, the prevention protect to synthesize analysis, the example roadbed road noodles disease harm of science examination and prevention protect of engineering application, put forward the roadbed road noodles engineering to protect of evaluation standard, suggest the prevention protect moment and way of keeping with local expressway.Through this research and study, hope to enlarge scientific detection and preventive maintenance theories, provide a reference for science of expressway construction and management decision.