Treatment and Improvement Technology of Old Pavement Disease from Jingmenkou to Chaonan in Pingyuan County
A detailed study was conducted on the treatment,renovation,and improvement of the old pavement problems in the section from Jingmenkou to Chaonan of Pingyuan County on National Highway G206.To comprehensively evaluate the road conditions,the re-search team used high-precision GPS equipment and an in vehicle mobile data acquisition system to obtain geographic coordinates and road condition data of an 8.25 km section.Traffic cameras and induction coil vehicle detectors were used to collect traffic flow and speed data.By using high-resolution photography technology and laser scanners,the types and distribution of diseases such as cracks,potholes,and ruts were recorded and analyzed.The GIS systems were used to identify disease hotspots and analyze their diffusion trends.In the study,Groud Penetrating Rador(GPR)and Falling Weight Deflectometer(FWD)technology were used to diagnose the displacement of the roadbed structural layer and pavement in depth.Combined with structural evaluation software models,renovation strategies including thickening of the cover layer,local deep repair,and improvement of the drainage system were developed.The appli-cation of high elasticity modified asphalt mixture and high-strength cement stabilized material has been specifically implemented,and the construction quality and efficiency have been improved by using concrete laser leveling technology and milling and re laying tech-nology.In addition,repairing and optimizing the drainage system,updating traffic signs and road markings to ensure traffic safety.
old pavementdisease treatmenttransformation and upgrading
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