Safe tunneling method using numerical modeling of rock blocks in long tunnels

Jae-Yun Hwang

doi:10.9711/KTAJ.2015.17.2.167

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2015 Vol.17, Issue 2 Preview Page Next Page

Safe tunneling method using numerical modeling of rock blocks in long tunnels 장대터널에서의 암반 블록의 수치 모델링을 이용한 터널 안전 시공법

31 March 2015. pp. 167-174

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Abstract

Since about 70 percent of the territory is mountainous, more tunnels are constructed in Korea for maximizing the development efficiency. With the increasing number of tunnel construction, safe construction in tunnels has been emerged as the utmost important subject. Recently, the number of long tunnel construction is steeply increased because of the request for high speed and straight road. In this study, a safe tunneling method using numerical modeling of rock blocks in long tunnels is proposed, and then applied to the long tunnel based on real discontinuity information observed in situ. It is possible to detect key blocks all along the tunnel exactly by using the numerical analysis program developed for the safe tunneling method using numerical modeling of rock blocks. This computer simulation method with user-friendly interfaces can calculate not only the stability of rock blocks but also the design of supplementary supports.

Keywords

Safe tunneling method

Long tunnel

Rock blocks

Numerical modeling

Computer simulation method

국토의 70%이상이 산악 지형인 우리나라에서는 지형적인 특성으로 터널 건설이 중요하며, 터널 건설의 증가로 안전한 터널 건설이 중요한 문제로 대두되고 있다. 최근, 도로의 고속화와 직선화로 인해 장대터널 건설이 증가하고 있다. 본 연구에서는 장대터널에서의 암반 블록의 수치 모델링을 이용한 터널 안전 시공법을 제안하고, 현장에서 관찰한 불연속면 정보를 근거로 하여 실제 장대터널에 적용했다. 실제 터널현장에 있어서, 암반 블록의 수치 모델링을 이용한 터널 안전 시공법을 위해서 새롭게 개발한 수치해석 프로그램을 사용하여 정확한 키블럭 추출이 가능한 것을 검증하였다. 사용하기 쉬운 사용자 인터페이스를 가지고 있는 본 컴퓨터 시뮬레이션 기법은 암반 블럭의 안정성 계산뿐만 아니라 추가 보강대책공의 설계도 가능하다.

키워드

터널 안전 시공법

장대터널

암반 블록

수치 모델링

컴퓨터 시뮬레이션 기법

References

1.Goodman, R.E., Shi, G.H. (1985), ”Block theory and its application to rock engineering”, Prentice- Hall.

2.Hwang, J.Y. (2003), “Stability evaluation of rock blocks in tunnels for observational method”, Ph.D. Dissertation, Kyoto University, Kyoto, p. 289

3.Hwang, J.Y., Ohnishi, Y., Nishiyama, S. (2003), “Removability and stability analysis method of rock blocks considering discontinuity persistence in tunnel construction”, Journal of the Korean Geotechnical Society, 19, pp. 39-48.

4.Hwang, J.Y., Sato, M. (2004), “New practical rock block analysis for observational design and construction method in large tunnels”, Journal of Tunnel Engineering, 14, pp. 17-26.

5.Hwang, J.Y., Sato, M., Ohnishi, Y. (2004), “Quick evaluation method for discontinuity properties by vision metrology for observational design and construction method in tunnels”, Proceedings of the 33rd Symposium of Rock Mechanics, Tokyo, pp. 187-192.

6.Ohnishi, Y., Nagano, K., Fujikawa, T. (1985), “Evaluation of stability of excavated jointed rock mass by block theory”, Journal Geotechnical Engineering, 364, pp. 209-218.

7.Ohnishi, Y. (1999), “Survey, analysis and evaluation for discontinuous rock mass”, Soil and Foundation, JGS, Vol. 47-12, pp. 61-62.

8.Ohnishi Y. (2002), “Keynote lecture: numerical methods and tunneling”, Proceedings of the 4th International Summer Symp., Kyoto, pp. 1-21.

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 : 17
No :2
Pages :167-174
Received Date : 2015-03-13
Revised Date : 2015-03-26
Accepted Date : 2015-03-27
DOI :https://doi.org/10.9711/KTAJ.2015.17.2.167

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

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