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정사각형 콘크리트 구조물의 파쇄도 향상을 위한 비폭성 파쇄제와 천공 홀의 효과적인 배치

Effective Arrangement of Non-explosive Demolition Agents and Empty Holes for Improving Fragmentation of Square Concrete Structures

  • 조황기 (한국해양대학교 기계공학과) ;
  • 남윤민 (한국해양대학교 기계공학과) ;
  • 김경진 (한국해양대학교 토목환경공학과) ;
  • 이재하 (한국해양대학교 건설공학과) ;
  • 손동우 (한국해양대학교 기계공학부)
  • Cho, Hwangki (Department of Mechanical Engineering, Graduate School, Korea Maritime and Ocean Univ.) ;
  • Nam, Yunmin (Department of Mechanical Engineering, Graduate School, Korea Maritime and Ocean Univ.) ;
  • Kim, Kyeongjin (Department of Civil and Environmental Engineering, Graduate School, Korea Maritime and Ocean Univ.) ;
  • Lee, Jaeha (Department of Civil Engineering, College of Engineering, Korea Maritime and Ocean Univ.) ;
  • Sohn, Dongwoo (Division of Mechanical Engineering, College of Engineering, Korea Maritime and Ocean Univ.)
  • 투고 : 2017.01.12
  • 심사 : 2017.02.13
  • 발행 : 2017.04.28

초록

콘크리트 구조물 또는 암석의 해체 공정에서 소음, 진동, 분진 등의 발생을 초래하는 기존의 발파공법을 대신하여 비폭성 파쇄제의 이용을 고려할 수 있다. 본 연구는 유한한 정사각형 콘크리트 구조물을 대상으로 하여 비폭성 파쇄제의 팽창이 준정적으로 균열을 발생, 진전시키는 과정을 유한요소해석으로 예측하고 기존 문헌에 보고된 실험결과와 비교함으로써 해석결과의 정확성을 검증하였다. 또한 비폭성 파쇄제 및 천공 홀의 배치에 따른 영향을 최소요구팽창압 관점에서 분석하였다. 더 나아가서 비폭성 파쇄제가 채워지지 않은 천공 홀이 비폭성 파쇄 공정에 미치는 영향을 분석하고, 분리 조각의 수를 증가시켜 파쇄도를 향상시키기 위한 비폭성 파쇄제 및 천공 홀의 효과적인 배치에 대하여 고찰하였다.

As an alternative to conventional explosive methods for demolition of concrete structures and rocks, the use of non-explosive demolition agents can be considered to reduce noise, vibration, and dust emissions during the demolition process. In this study, we conduct finite element analysis for crack initiation and propagation caused by the expansion of non-explosive demolition agents in square concrete structures. The predicted crack patterns are compared with the experimental results in the literature. The minimum values of the required expansion pressure of non-explosive demolition agents are also estimated, which depend upon the arrangement of non-explosive demolition agents and empty holes. Furthermore, we investigate the effect of empty holes on the fragmentation of concrete structures, and discuss the effective arrangement of non-explosive demolition agents and empty holes for fragmentation improvement.

키워드

참고문헌

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피인용 문헌

  1. Prediction of the Minimum Required Pressure of Soundless Chemical Demolition Agents for Plain Concrete Demolition vol.31, pp.5, 2018, https://doi.org/10.7734/COSEIK.2018.31.5.251