Large-diameter Cured-in-place Pipe (CIPP) Point Repair Offers an Economical Alternative to Total Pipe Replacement for Prematurely Failing Culverts
(Room Sagamore 7)
19 Sep 17
3:30 PM
-
4:00 PM
Tracks:
AREMA Technical Sessions By Date- Communications & Signals, AREMA Technical Sessions By Functional Group- Communications & Signals, AREMA Technical Sessions- Maintenance, Technical Sessions By Day- Monday
Trenchless pipe installation techniques such as auger-boring and pipe ramming are valued for their proven ability to install new culverts with minimal disturbance to sensitive rail bed substructures. In cases of premature failure, however, a cured-in-place pipe (CIPP) spot repair technique can oftentimes provide a much more economical solution than total pipe replacement. A CIPP culvert repair remedies isolated defects by curing in place one bands of composite fiberglass material impregnated with silicate resin. The repair is a robust, permanent rehabilitation technique for use on cracks, leaks, joint offsets and joint separation that will generally maintain a culvert’s inside diameter to within 0.25 inches. It can be used for round and oval pipe of all culvert materials including clay, concrete, steel, cast iron, stone, corrugated metal and plastic. Independent of the host pipe, CIPP point repairs installed by factory-trained point repair contractors meet or surpass the E80 Cooper Railroad Live Load on Wall rating as well as the AASHTO H20 live load standard. Overlapping point repair bands permits coverage of larger areas up to the full length of a culvert. The technique can also be used to add pipe, extending the length of the original culvert. In the case study that follows, one culvert contractor has been restoring its customers’ prematurely failing railroad culverts at one-third to one-fourth the cost of total culvert replacement.