Development of a Structural Design Methodology for Cementitious Sprayed Applied Pipe Linings in Gravity Storm Water Conveyance Conduits

Abstract

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. 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. 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 is currently no available standard design methodology for SAPL culvert renewal methods. This dissertation presents the results of nine full-scale structural soil box tests including three control tests, three pipe arch culverts, and three circular culverts renewed with cementitious SAPL tests. The invert sections of the corrugated metal pipe (CMP) samples were cut to simulate fully invert deteriorated culverts in service. The structural capacity of these pipe samples with and without SAPL were investigated. In addition, the feasibility of several deign equations, applicable to a fully deteriorated culvert was investigated. Ultimately, a SAPL design equation was developed for circular and pipe arch culverts renewed with cementitious SAPL.