Washington Suburban Sanitary Commission (WSSC)’s condition assessment and repair program on critical transmission mains continued in spring 2016 with a record-breaking project where a total of forty-one 60 in. to 66 in. diameter prestressed concrete cylinder pipe (PCCP) segments were lined with carbon fiber-reinforced polymer (CFRP) in about 30 days. The scope included installation of new CFRP liners in seven pipes according to the current state of the art AWWA C305-CFRP Renewal and Strengthening of PCCP  industry standard and proactive upgrade of existing CFRP liners in thirty-five pipes to meet the current strength and watertightness requirements. This is the largest number of proactive upgrades performed by a utility in the same outage to date. This paper discusses the challenges of performing such a large scope of CFRP lining of PCCP in a compressed schedule, with several contractor and quality control/quality assurance teams working simultaneously, without compromising quality.
WSSC Breaks Its Record in CFRP Lining of PCCP in One Outage
August 14, 2017
Publication: ASCE Pipelines Conference 2017
Services: Structural Rehabilitation