GOLDEN GATE BRIDGE

Location:

San Francisco, California, USA

Description:

This is the world's longest span bridge requiring seismic upgrade.

Total length: 2.7 km (1.7 miles)
Main span: 1280 m (4200 ft.)

Owner:

Golden Gate Bridge Highway and Transportation District

Client:

1995 - Golden Gate Bridge Highway and Transportation District

1999 - Balfour Beatty Construction, Inc.

Scope of Work:

South Approaches
In 1995, Buckland & Taylor Ltd. was a key player in the team led by Sverdrup Corporation to provide the plans, specifications and estimate (PS&E) for seismic retrofit of the south approach viaduct, the south anchorage housing, the Fort Point Arch, Pylon S1 and Pylon S2.

One of many challenges of this project involved the retrofit of the connections between the orthotropic bridge deck and the supporting superstructure. The retrofit scheme, designed by Buckland & Taylor Ltd. in conjunction with Sverdrup Corp., increased the strength and ductility of the connection without affecting the gravity load path. Careful consideration was given to live load fatigue.

North Approaches
In 1999, Buckland & Taylor Ltd. provided construction engineering services directly to the Contractor for the design of the temporary support towers for the seismic retrofit of the North Approach Viaduct. Buckland & Taylor Ltd. checked the temporary tower supports for stability and strength in accordance with the Golden Gate District Design Guidelines. We also investigated the sensitivity of the temporary support structures to accidental loadings (overjacking, blinding, uneven lateral loading, differential settlement and torsion).

For more information on our bridge engineering services, please Contact Us.

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