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Lessons Learned Rehabilitating Large Diameter Tunnel Structures

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The City of Austin, Texas placed the Govalle Wastewater Tunnel into service in 1988. The Govalle Tunnel is an approximately 8 mile long, 96-inch internal diameter, cast-in-place concrete tunnel installed at an average depth of 100 feet below ground surface. The Govalle Tunnel began to experience severe corrosion problems within 10 years of being placed into service. Inspections revealed systemic corrosion throughout the tunnel and shaft structures. Rehabilitation has successfully been completed on the first project using calcium aluminate to restore the corroded concrete and coating the calcium aluminate with epoxy to prevent further corrosion

Keywords: Calcium Aluminate; Epoxy; Rehabilitation; Tunnel

Document Type: Research Article


Publication date: January 1, 2011

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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