Highway to the Cadiz Zone: Maverick Approach to Repairing 80-Year-Old Interceptor under IH-35 in Dallas
Publication: Pipelines 2023
ABSTRACT
A leaking 80-year-old 60-in. diameter wastewater force main under the embankment of IH-35 near downtown Dallas presented a difficult challenge. With wastewater service and the freeway both in jeopardy, DWU collaborated with the engineer and contractor to devise an innovative in situ repair methodology. The team performed a forensic analysis that pointed to an original installation transition point near the suspected leak location. Running out of options and needing an internal rehabilitation construction option that could avoid surface impacts and excavation, the team investigated a carbon fiber reinforced polymer (CFRP) construction repair solution. CFRP offered an internal rehabilitation method unconstrained by pipe geometry or surface constraints and formed a pipe that is now capable of handling higher surface loads than its original design capacity. The collaborative approach between DWU, the engineer, and the contractor yielded a fast-track solution to a problem that had lingered for years but was completed in mere months.
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REFERENCES
AWWA (American Water Works Association). AWWA C305, CFRP Renewal and Strengthening of PCCP, 2018.
ASTM. ASTM D3039, Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials.
ASTM. ASTM D7290, Standard Practice for Evaluating Material Property Characteristic Values for Polymeric Composites for Civil Engineering Structural Applications.
ASTM. ASTM D7522, Standard Test Method for Pull-off Strength for FRP Bonded to Concrete Substrate.
ASTM. ASTM E2160, Standard Test Method for Heat of Reaction of Thermally Reactive Materials by Differential Scanning Calorimetry.
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Published online: Aug 10, 2023
ASCE Technical Topics:
- Business management
- Carbon fibers
- Construction engineering
- Construction management
- Construction methods
- Contracts and subcontracts
- Engineering materials (by type)
- Environmental engineering
- Fiber reinforced polymer
- Fibers
- Highway and road management
- Highway transportation
- Highways and roads
- Infrastructure
- Materials engineering
- Polymer
- Practice and Profession
- Rehabilitation
- Synthetic materials
- Transportation engineering
- Wastewater management
- Water treatment
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