New guideline for geomechanical design/construction of conventional NATM tunnels

Chang-Yong* Kim; Sung-Wan Hong; Kwang-Yeom Kim; Seung-Han Baek; Gyu-Jin Bae; Wulf Schubert

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2005 Vol.7, Issue 1 Preview Page Next Page

New guideline for geomechanical design/construction of conventional NATM tunnels NATM 터널 설계/시공을 위한 새로운 가이드라인 고찰

31 March 2005. pp. 73-88

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Abstract

Three approaches presently used for the design of underground structures in rock mass are quantitative rock mass classification system, classification systems based on the behavior of the rock mass during excavation and general qualitative procedures for the design process. In this study their characteristics and shortcomings are discussed, and Austrian guideline for tunnel design/ construction, that was proposed to solve the problems with these methods, are introduced and compared. For technically sound and economic tunnel construction, a flexible design and construction procedure is needed to cope with uncertain ground and boundary condition, and also actual ground condition should be predicted through feedback of geotechnical information obtained during construction.

Keywords

Rock classification

Austrian guideline

tunnel design/construction

monitoring

본 논문에서는 현재 암반 지하 구조물의 설계에 있어 사용되고 있는 접근법인 정량적 암반분류시스템, 시공중 암반 거동에 근거한 분류시스템 그리고 일반적인 정성적 설계 절차의 특징 및 장단점을 살펴보았으며, 이러한 설계 기법의 단점을 해결하기 위하여 제안된 오스트리아 터널 설계 가이드라인을 소개하고 국내의 경우와 비교하였다. 그 결과 기술적으로 안전하고 경제적인 터널 건설을 위해서는 불확실한 지반조건 및 환경조건에 매우 유연하게 대처할 수 있는 설계 및 시공 기술이 필요하다고 판단되며, 오스트리아 터널 설계 가이드라인에서 이와 관련된 기준을 제시하고 있다. 따라서 국내에서도 안전하고 경제적인 터널 건설을 위하여 시공중 계측 자료를 충분히 활용하여 실제 지반 조건을 예측하고 불확실한 지반 조건에 유연하게 대처할 수 있는 설계 및 시공 기술을 적용하는 것이 바람직하다고 사료된다.

키워드

암반분류

오스트리아 가이드라인

터널 설계/시공

계측

References

1. Bieniawski, Z.T., (1984), Rock Mechanics Design in Mining and Tunneling, Balkema, Rotterdam, p. 272.

2. Bieniawski, Z.T., (1989), Engineering Rock Mass Classifications, John Wiley & Sons, p. 251.

3. Bieniawski, Z.T., (1992), Design methodology in rock engineering: theory, education and practice, Balkema, Rotterdam, p. 198.

4. Goricki, A., (2003), Classification of Rock Mass Behaviour based on a Hierarchical Rock Mass Characterization for the Design of Underground Structures, Ph.D. Thesis, Institute for Rock Mechanics and Tunnelling, Graz University of Technology, p. 98.

5. Hoek, E. and Brown, E.T., (1980), Underground Excavation in Rock, Institution of Mining and Metallurgy, London, p. 527.

6. ITA Working Group on General Approaches to the Design of Tunnels, (1988), Guideline for the Design of Tunnels, Tunnelling and Underground Space Technology, Vol. 3, No. 3, pp. 237～249.

7. Singh, B. and Goel, R.K., (1999), Rock Mass Classification, A Practical Approach in Civil Engineering, Elsevier, Amsterdam, p. 267.

8. OGG, (2004), Guideline for the Geomechanical Design of Underground Structures with Conventional Excavation, Rock mass characterization and coherent procedure for the determination of excavation and support during design and con-struction, Austrian Society for Geomechanics.

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 : 7
No :1
Pages :73-88

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

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