Construction of Pavement Subsurface Drainage Systems (Reference Manual).

摘要

In 1988, the Federal Highway Administration (FHWA) conducted a field survey (Demonstration Project No. 975, Permeable Base Design and Construction) of ten States (California, Iowa, Kentucky, Michigan, Minnesota, New Jersey, North Carolina, Pennsylvania, West Virginia, and Wisconsin) to determine design criteria and construction problems for building permeable bases. Now there are approximately over 30 States using permeable bases. Water in the pavement structure has long been recognized as a primary cause of distress. Within the past 5-10 years drainage of pavements has received an increasing amount of consideration. The mechanics of moisture distress are somewhat different for Portland cement concrete pavements and asphalt concrete (flexible) pavements; however the basic theory for hydraulic drainage and pipe flow are the same regardless of the pavement type.