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Arrangement of Agent Holes for Enhancing Crack Propagation in Structure Demolition Process using Soundless Chemical Demolition Agents

무소음화학팽창제를 이용한 구조물 해체시 균열진전 촉진을 위한 천공홀의 배치

  • Nam, Yunmin (Department of Mechanical Engineering, Graduate School, Korea Maritime and Ocean Univ.) ;
  • Kim, Kyeongjin (Department of Civil and Environmental Engineering, Korea Maritime and Ocean Univ.) ;
  • Park, Sanghyun (Department of Mechanical Engineering, Graduate School, Korea Maritime and Ocean Univ.) ;
  • Sohn, Dongwoo (Division of Mechanical Engineering, College of Engineering, Korea Maritime and Ocean Univ.) ;
  • Lee, Jaeha (Department of Civil Engineering, College of Engineering, Korea Maritime and Ocean Univ.)
  • 남윤민 (한국해양대학교 기계공학과) ;
  • 김경진 (한국해양대학교 토목환경공학과) ;
  • 박상현 (한국해양대학교 기계공학과) ;
  • 손동우 (한국해양대학교 기계공학부) ;
  • 이재하 (한국해양대학교 건설공학과)
  • Received : 2015.10.13
  • Accepted : 2015.10.29
  • Published : 2015.12.29

Abstract

For demolition of offshore facilities, traditional methods such as jackhammer and explosive methods have been often used in construction industry. However, prohibitions for use of those methods are becoming more rigorous especially in environmentally and historically sensitive areas. It was also reported that the explosive demolition method on maritime bedrock can cause a disturbance of ecosystem. For those reasons, use of soundless chemical demolition agent(SCDA) is getting the spotlight. However, researches regarding the mechanical point of SCDA have seldom performed. There is no industrial standard for use of SCDA yet. In this study, a pilot experimental study in order to measure the required expansive pressure that could be generated from SCDA was conducted. Numerical models were developed in order to estimate the required expansive pressures of SCDA for initiating cracks depending on selected key parameters. Obtained results indicate that the required pressure does not decrease linearly as increasing the hole diameter, the number of holes, and the ratio of hole-distance to hole-diameter.

Acknowledgement

Supported by : 한국연구재단

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