Research On Test Bed For Pavement Rapid Spray Repairing

As a common and multiple form of pavement disease,pothole seriously affects the road driving safety and comfort.The research object of this paper is a kind of test bed for pavement rapid spray repairing,which utilizes a new high-quality,high-efficiency,energy-saving and environmental protection pavement patching method – pavement fast spray patching technology,to realize the quick maintenance of asphalt pavement.After years of research,America and European countries have already developed a variety of spray injection repair machines.In order to fill our research gaps in this area,it is necessary to study this technology.By compared with the traditional repair method,this paper points out the advantages and a variety of practical value of pavement rapid spray injection repairing technology.According to its repair process and technical principle,the main structure and system composition of the test bed are determined,and the functional requirements of the test bed are put forward.Afterwards,the overall program of the test bed was determined and the key components have been selected by calculating,the control system has been designed.Finally,the influencing factors of the repair quality of the test bed of pavement rapid spray repairing are analyzed,and the debugging methods and steps of the key parameters of the test bed are preliminarily determined.The VOF model of the injection system is established by using the fluid dynamics software Fluent as the tool.The simulation results show that the influence of the key parameters on the quality of the repair is analyzed by simulating the injection effect of the different key parameters in the nozzle,which provides the theoretical reference for the actual debugging and operation of the test bed in the future.The results show that the structural basis and the principle of the whole system are analyzed,which provides the theoretical basis and reference for the test bed build.The overall design of the test bed,the selection of the components and the design of the control system can meet the function of the test bed requirements;when the wind speed and asphalt flow rate are constant,the ring groove outlet can give a better coating effect comparing to the round hole and fan-shaped outlet;for the ring groove outlet,when the asphalt flow is constant,the greater the wind speed the worse the coating effect,and when the asphalt flow is constant,the greater the asphalt flow the better the coating effect.It is hoped that the research results in this paper will promote the good development of the domestic pavement rapid spray repairing machine,enhance the practical engineering application level of the pavement rapid repairing technology,and provide reference for the design and application of the similar repair equipment.