Longitudinal pipe underdrains and transverse pipe underdrains spaced at approximately 60-ft intervals were used to provide groundwater control on one section of the kirtland-chardon road highway project in lake county, ohio. This area was designated spring area by thegeotechnical consultant because of extremely severe groundwater problems in the subgrade. Normal practice is to provide aggregate drains spaced at 50-ft intervals on uncurbed flexible pavements, but the severe groundwater problems on this section warranted additional drainage. Aggregate drains were placed on the remaining uncurbed sections of the project per normal practice. Four years after construction, the pavement in the spring area, where the improved drainage system was provided, is in excellent condition. Severe distress has been observed in the areas with standard drainage that abut the spring area. This paper appears in transportation research record no. 1329, Geocomposite pavement drain systems 1991
Abstract