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Demonstration of an Innovative Large-Diameter Sewer Rehabilitation Technology in Houston, Texas
Selvakumar, A., J. Matthews, AND W. Condit. Demonstration of an Innovative Large-Diameter Sewer Rehabilitation Technology in Houston, Texas. In Proceedings, No-dig 2014, Orlando, FL, April 13 - 17, 2014. North American Society for Trenchless Technology (NASTT), Liverpool, NY, 999, (2014).
While sewer renewal technologies currently being used for the repair, replacement and/or rehabilitation of deteriorating wastewater collection systems are generally effective, there is still room for improvement of existing technologies and for the development of new technologies. Many utilities are seeking innovative rehabilitation technologies, particularly for large-diameter pipes; however information about these emerging technologies is not always readily available. As part of the U.S. Environmental Protection Agency (USEPA)’s Aging Water Infrastructure Program, a field demonstration program of innovative rehabilitation technologies was initiated with the purpose of (1) gathering reliable performance and cost data for new technologies; and (2) making the capabilities of these technologies better known to the industry. This paper describes the demonstration of an innovative, spray-applied, fiber-reinforced geopolymer mortar for rehabilitating a 60-in. reinforced concrete pipe approximately 25 ft deep in Houston, TX. The demonstration section was 165 ft of severely deteriorated pipe that terminated at a WWTP. Unique aspects of this project included (a) the use of an innovative and emerging large-diameter rehabilitation technology on a severely deteriorated pipe located beneath a large open stormwater channel; (b) an independent, third-party assessment of the technology; and (c) difficult flow control issues at the WWTP.
As trenchless technologies have continued to develop and improve over the past 40 years, the average rate of system renewal is still not adequate to keep up with the increasing needs of utilities. To meet that need, many wastewater utilities are seeking innovative trenchless technologies to repair larger portions of their systems. However, information on emerging technologies is not always easy to obtain. The need for independently verified information on emerging technologies has been a focus of U.S. Environmental Protection Agency (U.S. EPA) through its Aging Water Infrastructure since 2007 (U.S. EPA, 2007). The U.S. EPA created an innovative technology demonstration program to demonstrate and evaluate the performance of emerging technologies under actual field conditions (Matthews et al., 2013). The field demonstration of innovative rehabilitation technologies is intended to make the capability of these technologies better known to utilities
Record Details:Record Type: DOCUMENT (PAPER IN NON-EPA PROCEEDINGS)
Organization:U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL RISK MANAGEMENT RESEARCH LABORATORY
WATER SUPPLY AND WATER RESOURCES DIVISION
URBAN WATERSHED MANAGEMENT BRANCH