In highway construction, loose roadbed and subgrade soils must be compacted to improve their strength characteristics for the long-term pavement performance. Groundwater base clearance, which is defined as the clearance between the groundwater level and pavement base layer within a pavement system, becomes an important factor during the pavement construction. When an adequate groundwater base clearance is not provided, difficulties in constructing the pavement sublayers are often encountered. This paper presents an experimental study of the constructability of compacting pavement sublayer under various levels of groundwater base clearance. A full-scale test-pit program and a field experimental program were conducted to evaluate the constructability of pavement compaction in Florida. Both static and dynamic compaction methods were evaluated. The experimental results indicated that constructability of the granular pavement sublayer was not a problem where the groundwater base clearance was at least about 2 - 3 feet (0.60 - 0.91 m). To ensure constructability, a minimum of 3-foot (0.91 m) groundwater base clearance would be suggested for the pavement design and construction.
The Effect of Groundwater Base Clearance on Constructability of Florida Pavements
Ninth Asia Pacific Transportation Development Conference ; 2012 ; Chongqing, China
Sustainable Transportation Systems ; 591-598
2012-06-28
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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