Chapter
Nov 16, 2022
Seismic Design Approach for Underground Structures of Los Angeles Metro Regional Connector Transit Corridor Project
Authors: S. H. Jason Choi [email protected], William H. Hansmire, Ph.D. [email protected], Zsolt Horvath [email protected], and Carlos Herranz [email protected]Author Affiliations
Publication: Lifelines 2022
ABSTRACT
The Regional Connector Transit Corridor (RCTC) Project is a $1.75B design-build project currently being constructed by the Los Angeles County Metropolitan Transportation Authority (Metro). The 3.1 km (1.9 mile) long light rail transit project includes major underground elements: twin bore tunnels, cut-and-cover box tunnels, three cut-and-cover underground stations, and a rail crossover cavern. Final design of the underground structures has been completed and construction has substantially advanced with revenue service planned for late 2022. Located in downtown Los Angeles, California, one of the most active seismic regions, the project underwent comprehensive seismic design for its underground structures in compliance with the Metro Rail Design Criteria. This paper overviews Metro’s seismic design criteria and presents the project-specific design approach that has been taken for the major underground elements of this project.
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REFERENCES
AMEC. (2013). Results of One-Dimensional Site Response Analysis, Downtown Los Angeles, California. May 24, 2013.
Caltrans. (2013). Seismic Design Criteria. Version 1.7, April 2013.
Group Delta. (2016). Geotechnical Design Summary Report IB: Geotechnical Interpretations and Analyses for Stations and Cut-and-Cover Structures, February 09, 2016.
Hatch Mott MacDonald. (2017). 2nd/Broadway Station Structural Calculations, February 9, 2017.
Hashash, Y. M. A., Hook, J. J., Schmidt, B., John, I., and Yao, C. (2001). “Seismic design and analysis of underground structures”. Tunnelling and Underground Space Technology, 16 (4), 247-293.
Herranz, C., Bragard, C., Hee, I., and Cerulli, D. (2019). “SEM Cavern Construction in Downtown LA.” Proc. Rapid Excavation and Tunneling Conference, Chicago, IL, 2019.
Metro (Los Angeles County Metropolitan Transportation Authority). (2013). Metro Rail Design Criteria (MRDC) Section 5 – Structural/Geotechnical, May 20, 2013.
Wang, J. (1993). Seismic Design of Tunnels – A Simple State-of-the-Art Design Approach.
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Lifelines 2022
Pages: 308 - 321
History
Published online: Nov 16, 2022
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P.E.
1WSP USA, Inc., Los Angeles, CA. Email: [email protected]
P.E.
2WSP USA, Inc., Los Angeles, CA. Email: [email protected]
P.E.
3Mott MacDonald, San Jose, CA. Email: [email protected]
P.E.
4Mott MacDonald, Madrid, Spain. Email: [email protected]
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