SLC Airport Phase-2: Dewatering and Earth Retention
Editor Alix Bemis
The SLCDA, Salt Lake City Corporation Department of Airports, wrapped up phase-1 of their historic Terminal Redevelopment Program (TRP) in late 2020 and began working on phase-2 construction. As a key contributor to this historic project, Ralph L. Wadsworth Construction (RLW) was awarded three separate alternative delivery construction contracts by SLCDA for TRP phase-2. Phase-2 of this project will include a 125-foot-wide tunnel that will connect the new North and South Concourses as well as constructing a whole new South-East concourse. Construction will include deep foundation work, dewatering and earth retention work, and civil and airfield work. The driven piles for phase-2 will include pouring 70,000+ linear feet of concrete filled steel pipe piles, driving 125,000 square feet of sheet pile, and installing 98,000 linear feet of driven H-Pile. The dewatering and earth retention scope consists of an earth retention system for excavation depth of 33-feet to facilitate the construction of the tunnel that will connect concourses and terminals. The scope also includes excavation & disposal of 150,000 cubic yards of material, backfilling the void between the tunnel and shoring once the tunnel construction is complete.
To meet the project's demanding schedule, RLW has multiple cranes on site driving sheet pile, H-pile, and pipe pile using two ICE® I-46v2 Diesel Impact Pile Hammers along with two ICE® Model 44B Vibratory Pile Drivers. Pictured here (Image 1), RLW construction crews are driving 60'x16" steel pipe pile and H-Pile using an ICE® Model I-46v2 Diesel Pile Hammer. Also pictured here (Image 2), an ICE® Model 44 Vibratory Pile Hammer is driving sheet pile.
TRP Phase-2 foundation work, dewatering and earth retention work, and civil and airfield work for Salt Lake City Airport new South Concourse East began in September 2020 and RLW will continue working on this portion of the project for three years.
Pollyanna Cunningham, MA, MBA
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