John Wayne Airport, Orange County
Group Delta Consultants personnel performed design-level geotechnical investigations and construction-phase services during a major redevelopment and expansion of John Wayne Airport in Orange County, California. This major project included concrete taxiways, runways, terminal aprons, two new multi-storied parking structures, elevated and depressed roadways, arterial street and freeway improvements, and retaining walls. Also included was the construction of various underground utilities such as storm drains, water, sewer, and electrical lines, fire hydrant laterals, manifold lines, jet fuel lines, and oil and water separator tanks.
Our construction-phase services included observation and testing during the overlay of existing pavements including runways, various taxiways, north and south blast pad, new wearing surface, and maintenance roads. These pavements were constructed as asphalt pavement concrete designed to FAA standards for Boeing 767 Aircraft. Specific tasks included testing and observation during grading, utility trench backfill, placement and compaction of
select fill, and subgrade and base course preparation. Additional construction phase services included inspection during the driving of over 5,000 pre-cast, pre-stressed, square concrete piles for construction of the parking structures and elevated roadways. GDC also performed extensive in-house geotechnical laboratory testing on hundreds of samples collected during construction. These analyses included compaction, California Bearing Ratio (CBR), gradation, and sand equivalent testing in accordance with FAA, ASTM, and Caltrans requirements.