Development of Half-Precast Structure for Use as RC Wall Member in Open-Cut Tunnels


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. 著者らは,大断面ボックスカルバートでの生産性の向上(構造の合理化・施工の省力化)を図るため,函体の側壁部に適用する,ハーフプレキャスト構造の開発を行った。また,著者らは,このハーフプレキャスト構造のせん断補強方法を検討するため,想定側壁部材を1/4に縮小した試験体により,せん断補強方法をパラメータとしたせん断実験を実施した。その後,ハーフプレキャスト構造がRC構造と同等以上の曲げ性能を有していることを確認するため,せん断実験と同様に1/4スケールの試験体を用いて,曲げ実験および軸力を導入した軸曲げ実験を実施した。


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  • Accession Number: 01681019
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Aug 1 2018 3:01PM