基于建养一体化的高速公路拼宽改建段路面设计方法研究OA

The types and causes of pavement diseases in the highway widening reconstruction section in South China were in-depth analyzed in this paper.The crack rate,rut depth and roughness index were selected as the design in-dexes to control the pavement service performance.The corresponding analysis and prediction models were estab-lished for each index,and the pavement design indexes were proposed based on the integration of construction and maintenance.Combined with environmental parameters,traffic volume,material parameters,analysis period and other factors,as well as the benefit cost analysis and calculation based on the integration of construction and main-tenance,the design method and process of highway widening section pavement were formed.This method is applied to design the pavement structure of the widening and reconstruction section of a reconstruction and expansion high-way project in Guangdong Province.The results show that the technical condition of the pavement is better after three years in service,and the cracks and rutting diseases are less,which show that the design method fully considers the pavement performance requirements of the widening and reconstruction section,and achieves the design purpose of integration of construction and maintenance.