Development of Half-Precast Structure for Use as RC Wall Member in Open-Cut Tunnels
By Y. Yoshimura, G. Hirochi, D. Takeuchi and I. Nakaya
Concrete Journal, Vol.55, No.8, Aug. 2017
- Synopsis
- The authors have developed a half-precast structure for application to the sidewalls of tunnel boxes in order to improve productivity at large-section box culverts (structure rationalization and construction labor saving). To determine which shear reinforcing method to use for this half-precast structure, the authors conducted shear tests using the shear reinforcing method as a parameter, using downsized quarter scale sidewall members of the proposed design as specimens. Then, in order to verify whether the half-precast structure has flexural capacity equivalent to or better than that of an RC structure, a bending test was carried out along with a bending test introducing axial force, using quarter scale specimens as in the shear experiment.
- Keywords:
- productivity improvement, labor saving, precast, half-precast, shear reinforcing steel plate
