Abstract:

A method of calculating the elastic modulus of a fiberreinforced polymer utility tunnel using ring stiffness is proposed to accurately select the value of elastic modulus of fiberreinforced polymers in calculations. Furthermore, the deformation and related law of characteristic points of the fiberreinforced polymer utility tunnel are examined via numerical simulation. Finally, static and dynamic load tests are conducted in a shallowburied fiberreinforced polymer utility tunnel in Deyang, China. The following results are obtained: (1) The pipe elastic modulus calculated using ring stiffness is essentially feasible. (2) The deformation of the shallowburied fiberreinforced polymer utility tunnel is closely related to the backfilling quality but does not exhibit a clear relationship with the internal annular rib. (3) The deformation and related law of the utility tunnel obtained through numerical simulation under static and dynamic loads are consistent with the field test results.

Key words: shallowburied utility tunnel, fiberreinforced polymer, static load, dynamic load, deformation