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http://dx.doi.org/10.9711/KTAJ.2018.20.2.469

Structural performance evaluation of precast concrete segment using synthetic fibres  

Lee, Hoseong (JIYUN EnC Co., Ltd.)
Kim, Changyong (Geotechnical Engineering Research Institute, Korea Institute of Construction Technology)
Lee, Sean S. (Dept. of Earth Resources and Environmental Engineering, Hanyang University)
Kim, Seungjun (JIYUN EnC Co., Ltd.)
Lee, Kyeongjin (JIYUN EnC Co., Ltd.)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.20, no.2, 2018 , pp. 469-483 More about this Journal
Abstract
Steel bars have been widely used as the primary reinforcement for Precast Segmental Concrete Lining for TBM Tunnels. Previously, studies have been carried out to gauge the potential for steel fiber reinforcement to replace the use of steel bar reinforcements in the segmental lining to reduce the amount of the steel bar reinforcement. Steel fiber reinforcements have been investigated and widely applied to SFRC TBM linings to improve the constructability of SFRC TBM linings worldwide. However, the steel fiber reinforcement often caused punctures to the water membranes inside tunnel lining and had long-term durability deterioration issues caused by steel corrosion, as well as cosmetic problems. Therefore, this paper sought to gauge the potential of synthetic fiber reinforcements, which have proven to be very attractive substitutes for steel fiber reinforcements. This study analyzed the performance of both steel and synthetic fiber reinforcements in segmental linings and evaluated the applicability of the fiber reinforcements to the TBM Precast Concrete Segmental Linings of TBM tunnels. As a conclusion, this study demonstrates that the potential use of steel and synthetic fibers in various combination, can substitute the rebar reinforcement in the concrete mix for segmental concrete linings.
Keywords
Shield TBM tunnel; Precast concrete segment lining; Synthetic fibre; Steel fibre;
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Times Cited By KSCI : 2  (Citation Analysis)
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