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Home > Services > BART Extensions to San Jose, Milpitas and Santa Clara
The Silicon Valley Rapid Transit (SVRT) Project will extend the San Francisco Bay Area Rapid Transit (BART) System south from Fremont to the cities of Milpitas, San Jose, and Santa Clara, California. The 16.3 -mile extension will connect the Silicon Valley communities to the San Francisco Bay Area cities served by BART.
The SVRT extension will include six passenger stations, three above and three below ground, a maintenance and vehicle storage facility, and the upgrading of the existing BART "core system" to permit integration of the SVRT extension into the existing rapid transit system. The alignment is comprised of 11 miles of at -grade, elevated, and cut -and- cover track, and a 5- mile tunnel segment consisting of twin bores and a cut -and- cover crossover structure.
ASC had Dots Oyenuga , Ph.D., P.E.; and Bob Clemons , P.E.; providing value engineering on the $ 3.8 billion BART extension project to Silicon Valley.
Dots Oyenuga, Ph.D., P.E. conducted a review of a Composite DSM / Concrete Wall VE Alternative proposed for use as a permanent wall on the project for the trench structures at Zones 5 and 6 (Contracts C203 and C202, respectively). This review provides answers to specific questions posed by VTA on the Composite DSM / Concrete Wall as a viable permanent wall. The concept is a refinement of the original concept and considers the potential cost benefit of using the current steel soldier pile reinforced DSM walls, in combination with a shotcrete wall section, as both permanent and temporary structural walls.
The concrete invert slab would be connected to the steel wide flange with welded steel studs. A shotcrete facing would be applied to the DSM walls above the invert slab to produce a smooth finish. It would also be connected to the steel wide flange beams with welded steel studs .
This system results in savings of approximately 15% over the original design, which, because of the extensive length of trench structure on the SVRT project have translated into very substantial costs savings for the project .
ASC provided Geotechnical Engineering services, Construction Quality Control and Materials Testing services on this $20 Million project. We wrote the Construction Quality Control plan and provided the Construction Quality Control Manager.
