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Identification of Dominant Cause of Cut-Slope Collapse and Monitoring of Reinforced Slope Behavior

개착사면의 붕락요인 분석 및 보강거동 계측

  • 조태진 (부경대학교 에너지자원공학과) ;
  • 이상배 ((주)락인포 연구개발부) ;
  • 이근호 ((주)호승이앤씨) ;
  • 황택진 (동의대학교 토목공학과) ;
  • 강필규 (한국도로공사 홍천양양건설사업단 15~16공구) ;
  • 원병남 (한국도로공사 충청지역본부 도로팀)
  • Received : 2010.12.31
  • Accepted : 2011.02.15
  • Published : 2011.02.28

Abstract

Failure aspects of cut-slope, which induce the sequential collapses during the excavation stage, have been analyzed. Slope rock structures are investigated by examining the orientations and positions of discontinuity planes calculated based on the BIPS image inside the boreholes. Drilled core log has been also used to identify the structural defects. Clay minerals of swelling potentials are detected through XRD analysis. Numerical analysis for slope stability has been performed by utilizing the joint shear strength acquired from the direct joint shear test. Cut-slope collapse characteristics have been studied by investigating the posture of failure-prawn joint planes and the stability of tetrahedral blocks of different sizes. Cross-section analysis has been also performed to analyze the cut-slope behavior and to estimate the amount of reinforcement required to secure the stability of cut-slope. Behavior of reinforced cut-slope is also investigated by analyzing the slope monitoring data.

Acknowledgement

Supported by : 한국연구재단

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