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http://dx.doi.org/10.9711/KTAJ.2022.24.6.495

Reduced model experiment to review applicability of tunnel pillar reinforcement method using prestress and steel pipe reinforcement grouting  

Kim, Yeon-Deok (Technology Research institute, Yookwang Construction)
Lee, Soo-Jin (Dept. of Civil Engineering, Hoseo University)
Lee, Pyung-Woo (Sungwoosamyeon Co., Ltd.)
Yun, Hong-Su (Institute of Technology Industry Co., Ltd.)
Kim, Sang-Hwan (Dept. of Civil Engineering, Hoseo University)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.24, no.6, 2022 , pp. 495-512 More about this Journal
Abstract
Due to the concentration of population in the city center, the aboveground structures are saturated, and the development of underground structures becomes important. In addition, it is necessary to apply the reinforcement construction method for the pillar part of the adjacent tunnel that can secure stability, economy, and workability to the site. In this study, the tunnel pillar reinforcement method using prestress and grouting was reviewed. There are various reinforcement methods that can compensate for the problems of the side tunnel, but as the tunnel pillar construction method using prestress and grouting is judged to be excellent in field applicability, stability, and economic feasibility, it is necessary to review the theoretical and numerical analysis of the actual behavior mechanism. Therefore, a scaled-down model experiment was conducted. The reduced model experiment was divided into PC stranded wire + steel pipe reinforcement grouting + prestress (Case 1), PC strand + steel pipe reinforcement grouting (Case 2), and no reinforcement (Case 3), and the displacement of the pillar and the earth pressure applied to the wall were measured. Through experiments, it was confirmed that the PC stranded wire + steel pipe reinforcement grouting + prestress method is the most excellent reinforcement method among various construction methods. It was judged that it could be derived.
Keywords
Prestress; Grouting; Side tunnel; Pillar; Model experiment;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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