The application of simplified risk assessment for tunnel

Sang-Hwan Kim; Chung-Hwan Lee

doi:None

All Issue

2007 Vol.9, Issue 1 Preview Page Next Page

The application of simplified risk assessment for tunnel 터널 리스크 평가 기법의 적용성에 대한 연구

31 March 2007. pp. 63-74

PDF XML

Abstract

Unexpected 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

Underground risk index(URI)

weighting factor

modified stability number

불확실한 지반의 상태는 항상 터널 건설에 있어서 많은 문제점을 일으킨다. 그러므로 새로운 터널의 건설에 앞서 위험에 대한 평가가 필요하다. 이 논문은 수정된 안정계수를 이용한 간편 위험도 평가 시스템인 URI(Underground Risk Index)를 제안하였다. URI의 평가요소들은 각 요소의 등급에 따라 점수화하여 분석함으로서 설계단계에서 위험 가능성에 대한 평가에 이용이 가능하도록 하였으며, 기존의 Interaction Matrix에서 8개의 설계 요소 중(RQD, 일축압축강도, 풍화도, 안정계수, 토피고, 지하수위, RMR, 투수계수) 안정계수 산정방법을 수정하여 보다 신뢰성을 높였다. 또한 현장적용에 대한 신뢰성을 검증하기위하여 URI 시스템을 실제현장에 적용하였다.

키워드

URI 시스템

가중치 계수

안정계수

References

1.김상환, 고경국, 이준식, 방규민 (2006), “지하공동 굴착안전에 대한 위험도 분석연구”, 한국지반공학회 가을학술발표, pp. 769.

2.Benardos, A.G., Kaliampakos, D.C. (2004), “A metho-dology for assessing geotechnical hazards for TBM tunnelling” International Journal of Rock Mechanics and Mining Sciences, Volume 41, Issue 6, September pp. 987-999.

3.Bieniawski, Z. T. (1989), “Engineering Rock Mass Classifications”, John Wiley & Sons, pp. 51-72.

4. Eskesen, D., Tengborg, P., Kampmann, J., Holst, V. T. (2004), “Guidelines for tunnelling risk manage-ment”, International Tunnelling Association, Work--ing Group No. 2-1”, Tunnelling & Underground Space Technology, pp. 259-269.

5.Einstein, H. H., Dudt, J.P., Halab, V. B., Descoudres, F. (1992), “Decision Aids in Tunneling Principle and Practical Application Monograph”, Swiss Federation Office of Transportation, pp. 207-231.

6.Arends, G., Bielecki, R., Castle, J., Drabek, S., Haack, A., Nedbal, F., Nordwark A., Sterling, R. (2004), “Risk Budget management in progressing

underground works, International Society for Trenchless Techno-logy (ISTT) and International Tunnelling Association (ITA) Joint Working Group Report”, Tunnelling and Underground Space Technology 19, pp. 29-33.

7.Hudson, J.A, (1992), “Rock engineering systems: The-ory and practice”, Chichester, UK, Ellis Horwood Limited.

8.Choi, H.H., Cho, H.N. (1996), “Risk assess-ment methodology for underground construction projects”, Tunnelling and Underground Space Technology, Volume 11, pp. 108-120.

9.Hass, C., Einstein H.H. (2002) “Updating the decision aids for tunnelling”, J. Construct. Eng. Manage. Volume 128, Issue 1, pp. 40-48.

10.Grima M. A., Bruines P.A., Verhoef, P.N.W. (2000), “Modelling tunnel boring machine performance by neuro-fuzzy methods.” Tunnelling and Underground Space Technology, Volume 15, Issues 3, pp. 259-269.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 9
No :1
Pages :63-74

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

All Issue