SURVEYOR PUSHES LASER SCANNING TO THE LIMIT

摘要

Mitchell Collins, chief surveyor with Alberici Constructors, St. Louis, helped take laser scanning and precision fabrication and concrete placement to new heights in 2012 on the Seabrook Floodgate Complex for the U.S. Army Corps of Engineers in New Orleans. The schedule-driven project-which includes two 120-ton vertical-lift gates and one sector gate with a pair of 235-ton sector leaves-required tight dimensional control in fabrication and construction. Traditionally, that control would be assured by dry-fitting fabricated parts to place embeds accurately; the parts would then be removed for secondary pours.