Japan Society of Civil Engineers 2019 Annual Meeting

Presentation information

第VI部門

山岳トンネル (9)

Tue. Sep 3, 2019 10:25 AM - 11:55 AM VI-12 (幸町総合教育棟 第31大講義室)

座長:高市 一馬(大成建設)

[VI-107] Characteristics of Preformed Crack-inducing Joint on Tunnel Lining

*張 志瑄1、齋藤 隆弘1、小野 緑1、浜田 元1 (1. 奥村組)

Keywords:Tunnel Lining, Long-span Tunnel Formwork Carriages, Crack-inducing Joint, Rapid Construction, Full-scale Experiments

In order to achieve the rapid construction in tunnel construction, a method of constructing concrete lining using long-span tunnel formwork carriage (18-21m) were developed. In this method, since the construction span is longer than usual, the risk of cracks occurring at unspecified locations due to temperature change and drying shrinkage increases. As a measure, a crack-inducing joint is formed in the center of the span and cracks are induced at the specified location. In this study, a full-scale experiment was conducted to confirm the characteristics of the preformed crack-inducing joint due to different concrete types and defect rates.

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