Analysis of Highway Pavement Structure and Surface Drainage Design
In order to improve the design quality of highway engineering and reduce pavement cracking,rutting,potholes and other problems,Firstly,taking Guangdong Provincial Highway S355 as the research object,and the cumulative number of equivalent design axle load actions of the design lane is calculated based on the traffic volume OD survey,and the lane level is determined as heavy traf-fic;Secondly,the thickness of the base layer was designed using road design software,and fatigue life of asphalt layer,fatigue life of in-organic binder layer,the permanent deformation of the asphalt layer,the vertical compressive strain of the roadbed top surface,and the low-temperature cracking coefficient were verified.A calculation model was established to calculate the tensile stress at the bottom of the asphalt pavement layer and the permanent deformation of the asphalt layer.The results were compared with those of HPDS soft-ware,and the error between the two was within 3.0%.Finally,the road surface drainage design and slope drainage calculation were an-alyzed from two aspects,and the calculation methods for allowable flow velocity on the slope and side ditch flow velocity were explained based on engineering cases.The calculation results met the requirements of the code,indicating that the drainage scheme is feasible.
万方数据
维普
