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Marriott Marquis Convention Center Hotel
Slurry Wall and Drilled Shafts

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Mariott

Mariott
Three Clamshell Rigs and Hydromill Drilled Shaft Construction

Location: Washington, D.C.
Owner: Marriott International
Completion Date: October, 2011
General Contractor: Hensel Phelps Construction Company

Vital Statistics:
Project Value: $22,000,000
Wall Type: 36”and 42” Reinforced Concrete Slurry Wall and 145 Drilled Shafts
Wall Area: 171,000 S.F.
Max. Depth: 126’

Project Description:
The 1,200 room Washington Marriott Marquis is located adjacent to the DC Convention Center. A six level underground structure includes three large ballrooms, 53,000 square feet of meeting rooms and two lower levels of parking accessible from a circular ramp located at the western end of the site. The project was constructed using up down construction methods, one of the first such projects in the Washington D.C. area. A perimeter slurry wall was constructed using three clamshell rigs and a hydromill. The mill was used to excavate through very dense sand and gravel. 145 drilled shafts, five to seven feet in diameter, with embedded columns were then installed, using four 90 ton hydraulic rotary drill rigs. East Coast Slurry performed this project in joint venture with TREVIICOS Corporation.


Mariott

Mariott
Foundation Plan Building Section

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