Considerations for Providing Subsurface Drainage in Jointed Concrete Pavements

Design considerations for pavement subsurface drainage in new or reconstructed jointed concrete pavements are outlined for all components of a permeable base system (permeable bases, separator layers, edgedrains, and outlets). Discussion topics—including guidelines for determining drainage needs, permeable base system components, hydraulic design of permeable base systems, structural design of permeable bases and separator layers, and economic considerations for providing drainage—are arranged to provide a comprehensive picture of the subject area. For topics with established procedures, such as the hydraulic design of permeable bases, a synthesis of information is presented. Where there is a lack of information or a clear consensus among researchers on a topic, new ideas and concepts are proposed.