The Simplified Approach of Risk Assessment for Tunnel

ground conditions have always been a major problem for the construction of tunnel. Therefore, it is necessary to evaluate the risk capacity before and/or during construction of new tunnel. This paper presents the simplified risk assessment system using modified stability number(N), namely Underground Risk Index(URI)-system, to evaluate the tunnel risk possibility in the design stage. URI is a scoring system for risk possibility by rating the each appraisal elements. The modified stability number (N) which is one of risk factor in the Interaction Matrix parameters such as RQD, UCS, weathering, overburden, stability number, ground water-table, RMR, permeability and so on, is used in the system. In addition, the case study is performed in order to verify the applicability of URI-system in practice.

keywords: URI 시스템, 가중치 계수, 안정계수, Underground risk index(URI), weighting factor, modified stability number, Underground risk index(URI), weighting factor, modified stability number

Reference

(2006) 지하공동 굴착안전에 대한 위험도 분석연구,

(Sep.2004) A methodology for assessing geotechnical hazards for TBM tunnelling ,

(2004) Guidelines for tunnelling risk management,

(1992) Decision Aids in Tunneling Principle and Practical Application Monograph Swiss Federation Office of Transportation,

(2004) Risk Budget management in progressing underground works, International Society for Trenchless Technology (ISTT) and International Tunnelling Association (ITA) Joint Working Group Report,

(1996) Risk Assessment Methodology for Underground Construction Projects,

(2002) Updating the decision aids for tunnelling,

(2000) Modelling tunnel boring machine performance by neuro-fuzzy methods,

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Article Contents

Vol.9 No.1

The Simplified Approach of Risk Assessment for Tunnel

Abstract

Reference

(사)한국터널지하공간학회