CHINATOWN STATION

Chinatown Station is one of three underground stations being constructed as part of the Central Subway Project in downtown San Francisco. Under subcontract to Tutor Perini, Frontier-Kemper is responsible for the excavation and initial support of the Underground Station Cavern. The work includes approx. 45,000 bcy of excavation and about 27,000 cy of shotcrete placement. The NATM/Sequential Excavation Method (SEM) will be utilized for the excavation of the station.

Scope of Work

Following the construction of the slurry walls and excavation for the headhouse shaft, Frontier-Kemper will begin SEM work with the construction of:

  • Cross-Cut Cavern
    • roughly 58-ft. tall; 48-ft. wide
    • 70-lf. in length;
    • excavated c/s area of approx. 2,255 sf.
  • North Platform Cavern
    • roughly 47-ft. tall; 60-ft. wide
    • 116-lf. in length
    • excavated c/s area of approx. 2,228 sf.
  • South Platform Cavern
    • roughly 47-ft. tall; 60-ft. wide;
    • 176-lf. in length
    • excavated c/s area of approx. 2,228 sf.
  • Crossover Cavern
    • roughly 41-ft. tall; 60-ft. wide
    • 268-lf. in length
    • excavated c/s area of approx. 1,942 sf.
  • Emergency Egress Shaft
  • (2) Emergency Egress Tunnels


Click here to learn more about the Central Subway Project.


FAST FACTS:

LOCATION: San Francisco, CA

MARKET: Transportation

OWNER: San Francisco Municipal Transportation (SFTA)

CONTRACTOR: Frontier-Kemper Constructors, Inc.

START DATE: April 2015

END DATE: May 2017

CONTACT US:

Frontier-Kemper Constructors, Inc.
15900 Olden St.
Sylmar, CA 91342

Phone: +1 (818) 362-2062
Fax: +1 (818) 833-4289