Construction Rationalization of a Large Railway Rigid-Frame Viaduct Using Plate-Anchored Mechanical Reinforcement Anchorage
By K. Kawamura, Y. Watanabe, Y. Nakata and F. Sato
Concrete Journal, Vol.64, No.11, Nov. 2026
- Synopsis
- During the construction of the reinforced concrete (RC) structure of a large-scale railway rigid-frame viaduct, reinforcing bar assembly was difficult at many locations because of the congested reinforcement arrangement specified in the design drawings. To solve this problem, conventional hooked anchorages were replaced with plate-anchored mechanical reinforcement anchorages. This modification significantly improved constructability and contributed to construction rationalization and productivity enhancement. This paper presents the results of deformation performance tests conducted to verify the applicability of the mechanical anchorage system to transverse confinement reinforcement in RC beam members, together with the application policy established based on the experimental findings. In addition, applications of the system to longitudinal reinforcement in RC columns and beams, as well as to shear reinforcement in footings, are reported.
- Keywords:
- Mechanical reinforcement anchorage method, Congested reinforcement, Transverse confinement reinforcement, Longitudinal reinforcement, Construction rationalization
