March/April 2022 - 91

AN OUTSTANDING PROJECT AWARD RUNNER UP
FEATURE ARTICLE
Shoring Design of Historic
LA Metro Station
The Regional Connector Transit Corridor
(RCC) is the Los Angeles Metro area's
ambitious light rail project, running
under the city's main thoroughfares,
Flower and 2nd streets. When completed,
it will alleviate traffic and
parking congestion downtown, while
connecting thousands of residents living
in the bedroom communities of Inland
Empire and Long Beach to their jobs
there. The rail line of 1.9 mi (3 km),
which involves a $1.756 billion (€1.545
billion) budget to construct the underground
rail line, including three new
stations. They are the Grand Av
Arts/Bunker Hill station at 2nd and
Hope streets, Historic Broadway Station
at 2nd Street and Broadway, and Little
Tokyo/Arts District Station at 1st Street
and Central Avenue, which will offer
riders their first " one seat/one fare " ride
option from Azuza to Long Beach.
Regional Connector Transit Corridor including Historic Broadway Station
Regional Connector Constructors JV
is led by Skanska USA Civil West
California District Inc. (Skanska), in
partnership with Traylor Bros., Inc.
(Traylor), to deliver RCC to the Los
Angeles County Metropolitan Transportation
Authority (Metro). PB&A was
the structural engineer of record (SEOR)
responsible to design the shoring
systems for the Grand Av Arts/Bunker
Hill Station at 2nd and Hope streets, and
Historic Broadway Station at 2nd Street
and Broadway.
The temporary shoring design for
Historic Broadway Station is the focus
of this article, and why the project
received special recognition as a runner
up for DFI's 2021 Outstanding Project
Award. Two main challenges are
discussed in particular: design of the
shoring system considering al l
construction stages, and design of an
underpinning system where the Los
Angeles Times Bui lding (Times
Building) protruded into the station
footprint.
AUTHORS Babak Mamaqani, Ph.D., P.E., P.M.P., and Pirooz Barar, S.E., PB&A
DEEP FOUNDATIONS * MAR/APR 2022 * 91

March/April 2022

Table of Contents for the Digital Edition of March/April 2022

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March/April 2022 - Intro
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