Culverts are important components of the highway infrastructure. They form passageways through the embankment to convey storm water. Culverts are structurally designed to support superimposed earth loads or other fill materials as well as live loads. Federal Highway Administration (FHWA) considers culverts as buried structures with span less than 20 ft and for circular shapes diameters less than 20 ft. Corrugated metal pipes (CMPs) and reinforced concrete pipes (RCPs) are commonly used as culverts in the United States. Most of these culverts were installed four to five decades ago and have reached their design life. Culvert failures sometimes happen suddenly and may cause potholes on the pavement or total failure of the roadway embankment. Spray applied pipe linings (SAPLs) are trenchless technology solutions for culvert rehabilitation that prevent further deterioration, such as corrosion, abrasion, etc., and can provide structural support for severely damaged host culverts and drainage structures. There are currently no available standards for application of SAPLs and their installation details, such as filling corrugations, uniformity of their thicknesses, etc. Therefore, the objective of this paper is to evaluate the need for filling the CMP valleys with SAPLs for enhancing structural and hydraulic performance.
展开▼
