Maintenance on Underground Subway Construction

by Vincent P. Mahon, Bay Area Rapid Transit, United States,

Document Type: Proceeding Paper

Part of: Excellence in the Constructed Project


The paper discusses maintenance the three types of subway construction in the Bag Area Rapid Transit system: cut and cover, driven tunnel, and prefabricated subaqueous railroad tube. Specialized on-track/off-track equipment has been designed for use in the tunnel maintenance program. This equipment consists of hi-rail jumbo trucks, welding trucks, vacuum type, and crew trucks. The maintenance division performs all of the routine maintenance such as, water control chemical grouting, corrosion control, re-torquing liner plate bolts, maintenance of all wayside reference points mile post markers, tunnel wash down, painting, etc. One of the most demanding maintenance requirements is water control and corrosion problems in ring section design created by electrolysis.

Subject Headings: Underground construction | Tunnels | Trucks | Maintenance | Subways | Rapid transit systems | Chemical grouting | Corrosion | California | United States

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