Coupled analysis for the stability estimation of a subsea tunnel in discontinuous rock masses using sensitivity analysis

민감도 분석을 통한 불연속 암반 내의 해저터널의 안정성 평가를 위한 연계해석

  • 유광호 (수원대학교 토목공학과) ;
  • 이동훈 (수원대학교 토목공학과)
  • Published : 2008.12.26

Abstract

In discontinuous rock masses, hydraulic-mechanical coupled analyses are required since groundwater flow in joints have a great influence on the stability of a subsea tunnel. In this study, a sensitivity analysis was performed based on coupled analysis to verify the routine which can estimate the safety factor of a tunnel in discontinuous rock mass. To this end, 324 cases of numerical calculations were performed with a commercial program, UDEC-2D. As a result, it was confirmed that the proposed routine for coupled analysis in discontinuous rock mass could give a reasonable result for the estimation of safety factor of a tunnel. Therefore, it is expected that the safety factor estimation method used in this study can be effectively applied for the stability estimation of a subsea tunnel in discontinuous rock masses.