Research On Preventive Maintenance Decision And Technology Of Liaoning Expressway

With the gradual deepening of reform and opening up, China’s rapid economic and social development, in order to deal with the increasingly serious traffic pressure and rigid demand, China’s highway mileage constantly refreshed. But with growing highway mileage, conservation problem has cropped up. From the beginning of the twentieth century, the rapid development of the highway into orbit, a rapid increase in highway mileage, conservation work has gradually become the focus of a high level of development of conservation techniques. Since the beginning of the twenty-first century, China built in the eighties and nineties has entered the freeway mostly large, repair stage and our previous conservation techniques tend to focus on unilateral road damage repair, without considering the maximization and environmental performance demand, inevitably resulting large energy consumption, have a greater impact on the surrounding environment. With the growing highway mileage, corresponding to resource consumption and environmental pressure has become even more severe. This led us to consider a unilateral way from the past performance of the transition to green-friendly recovery methods, yielding low road performance recovery concept. Whether it is in terms of construction technology terms, or in terms of organizational planning in terms of resource conservation and environmental protection have madea deep thinking. Face grim environmental conservation pressures and demands, based on a new concept of key conservation techniques gradually put on the agenda.The paper relys on existing pavement survey data, in a large number of test data analysis and investigation on the basis of the actual road conditions, road surface roughness made of asphalt pavement maintenance, pavement structural strength, rutting, road damage and four control targets rut depth, fracture rate, lateral force coefficient, functional trigger breakage rate of four single value indicators as road maintenance timing determination and gives defined criteria. By integrating pavement management system and preventive maintenance techniques to build the highway pavement maintenance system in Liaoning Province, to provide support for managing scientific norms.Wear layers of ultra-thin adhesive layer construction with the construction of oil and emulsion modified micro-surfacing asphalt pavement materials were tangible in-depth research, combined with the actual design and construction projects put forward the corresponding technical indicators. The actual temperature measured by road, get micro-surfacing the road to fill ruts can enhance high temperature deformation resistance conclusions. Conducted a comparative evaluation of results before and after the use of preventive maintenance technology implementation. The use of questionnaires, and through calculations, established in Liaoning Province each index pavement performance index PQI weight.