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2021 Vol.31, Issue 4 Preview Page

Research Article

Estimation from Field Tests of the Excavation Efficiency of an Improved Hydraulic Rock Splitting System

현장실험을 통한 개선된 수압암반절개시스템의 굴착 효율성 평가

Jong Oh Park1
,
Ik Woo2*
박 종오1
,
우 익2*
1Managing Director, Songam Engineering & Construction
2Professor, School of Architecture & Coastal Construction Engineering, Kunsan National University
1(주)송암 전무이사
2군산대학교 건축해양건설융합공학부 교수
*Corresponding Author
31 December 2021. pp. 719-730
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Abstract

An improved packer and injection system was developed to improve the efficiency of excavation by hydraulic rock splitting by reducing vibration and noise. Field testing of the system found hydraulic fractures limited in expansion and extension due to the loss of injection pressure by leackage from the cracks, and then the single packer applied to injection hole allowed to produce a sufficient tensile displacement for rock excavation. Numerical analysis based on the field test data could explain the development of cracks in the field experiments.

Keywords
hydraulic rock splitting
biotite granite
single packer system
injection system
numerical modeling

본 연구는 무진동 ‧ 무소음 암반 굴착을 위해 개발된 수압암반절개공법의 효율적인 굴착을 위하여 수압암반절개시스템의 패커 및 주입 시스템을 개량하였으며, 또한, 현장 실험을 수행하여 개선된 시스템의 효율성을 평가하였다. 수압파쇄균열은 누수로 인한 주입 압력의 손실로 인하여 균열확장 및 균열성장에 제한이 발생하였으나, 단일 패커의 팽창에 따른 인장응력에 의한 인장 변위는 암반 굴착을 용이하게 하였다. 현장 실험 자료를 바탕으로 수행한 수치해석결과는 현장 실험에서 형성된 균열의 발달을 모사할 수 있는 것으로 평가되었다.

키워드
수압암반절개
흑운모 화강암
단일 패커 시스템
주입 시스템
수치모델링
References
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 31
  • No :4
  • Pages :719-730
  • Received Date : 2021-09-28
  • Revised Date : 2021-11-26
  • Accepted Date : 2021-11-28
  • DOI :https://doi.org/10.9720/kseg.2021.4.719
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