Project context
Project profile for Century Plaza, preserving current site content about shoring coordination for the Century City renovation and tower excavation.
The Century Plaza Hotel in Century City is undergoing a major renovation. The existing 1964 hotel superstructure remains while four subterranean levels are demolished to make room for two 46-story towers.
The excavation accommodates four subterranean parking levels and tower mat foundations extending down 70 feet at the deepest location. Critical components of the shoring system occur along existing structures.
Cefali supports one adjoining lot with temporary cantilever piles that allow demolition of the existing structure and are later braced by tiebacks and preloaded rakers supported by a tieback-restrained reinforced concrete pad.
The tiebacks, rakers, soldier piles, and existing structures are outfitted with real-time instrumentation for monitoring shoring performance. Coordination included existing buildings, deep utilities in the street, the future Metro Purple Line, Bureau of Engineering review groups, Building and Safety, MTA, and multiple peer reviewers.
