Subsurface Drainage Practices in Pavement Design, Construction, and Maintenance (2022) / Chapter Skim
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1 An excess of water in a pavement structure can cause or exacerbate pavement distress, slope instability alongside the roadway, and loss of pavement strength, stability, and durability. Pavement subsurface drainage systems are intended primarily to remove water that infiltrates pavement structures through joints and cracks in the pavement surface or through lateral groundwater seepage, fluctuations in groundwater levels, and capillary action.
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2 Subsurface Drainage Practices in Pavement Design, Construction, and Maintenance locations, including sag locations (eight DOTs) , cut/fill transition locations (two DOTs)
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Summary 3 to have longer service lives to first rehabilitation, while the other eight expected them to have service lives that ranged from less than 10 percent longer to more than 30 percent longer. Similarly, of the 16 DOTs that expressed views on whether concrete pavements with subsurface drainage systems performed better than concrete pavements without them, nine did not expect drained concrete pavements to have longer service lives to first rehabilitation, while the other five expected them to have service lives that ranged from less than 10 percent longer to more than 30 percent longer.
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