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http://dx.doi.org/10.9711/KTAJ.2022.24.2.153

Concrete plug cutting using abrasive waterjet in the disposal research tunnel  

Cha, Yohan (Disposal Performance Demonstration Research Division, Korea Atomic Energy Research Institute)
Kim, Geon Young (Disposal Performance Demonstration Research Division, Korea Atomic Energy Research Institute)
Hong, Eun-Soo (HBC Inc.)
Jun, Hyung-Woo (Jeyoung Engineering & Construction)
Lee, Hang-Lo (Disposal Performance Demonstration Research Division, Korea Atomic Energy Research Institute)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.24, no.2, 2022 , pp. 153-170 More about this Journal
Abstract
Waterjet has been comprehensively used in urban areas owing to a suitable technique for cutting concrete and rock, and low noise and vibration. Recently, the abrasive waterjet technique has been adopted and applied by the Korea Atomic Energy Research Institute to demolish concrete plugging without disturbing and damaging In-situ Demonstration of Engineered Barrier System in the disposal research tunnel. In this study, the use of abrasive waterjet in the tunnel was evaluated for practical applicability and the existing cutting model was compared with the experimental results. As a variable for waterjet cutting, multi-cutting, water flow rate, abrasive flow rate, and standoff distance were selected for the diversity of analysis. As regarding the practical application, the waterjet facilitated path selection for cutting the concrete plugging and prevented additional disturbances in the periphery. The pump's noise at idling was 64.9 dB which is satisfied with the noise regulatory standard, but it exceeded the standard at ejection to air and target concrete because the experiment was performed in the tunnel space. The experimental result showed that the error between the predicted and measured cutting volume was 12~13% for the first cut and 16% for second cut. The standoff distance had a significant influence on the cutting depth and width, and the error tended to decrease with decrement of standoff distance.
Keywords
Disposal tunnel; Plug; Abrasive watejet; Concrete cutting;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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