Research Of High Grade Road Roughness

With the development of National Economy, High grad road constructions are experiencing high develop in our province and the whole country . At the new time ,with the growth of vehicle's rate flow of communications, and the end of vehicles ,Higher grade and higher quality of pavement are demanded .therefore ,the need of road roughness defined as one of the important index of road utility become higher and higher.Beginning from the effecting factors of high grade road roughness ,this paper consulted many recent domestic and foreign texts and field observation data of high grade roughness and explore the transfer principle of road roughness and probability statistics .The thesis makes an exhaustive description of the transfer principle of road roughness ,gives out the transfer equation and weigh coefficient ,determine the computation equation of transfer effect factor of roughness and list the examples to show and test the process. To guarantee the perfect ness of thesis and utility of theory of roughness quality.In the end ,this thesis sums up the application method of improving the road roughness and then make a test during the construction of Shi-Huang freeway and Jing-Hu freeway .All in all ,this research has some referring value of improving the construction quality and road roughness.