Structural Behavior of Monolithic Concrete Tunnel Liner Models

Eight tests of circular, lO-ft diameter models of cast-in-place tunnel linings unreinforced and with steel fiber and conventional reinforcement are described. The loading simulated interaction with the ground. The tests are cor.~cred with results of a computer program that simulates the soil-structure interaction and the nonlinear behavior of the linings. Additional studies of the concrete material properties and lining section behavior are described.U.S. Department of Transportation Contract DOT FR 30022Federal Railroad AdministrationOffice of the Secretar