Assessment of Deformation Modulus in Gneiss for Road Tunnel

Nag-Young Kim; Sung-Hwan Kim; Hyung-Sik Chung

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2001 Vol.3, Issue 1 Preview Page Next Page

Assessment of Deformation Modulus in Gneiss for Road Tunnel 도로터널에서 편마암 구간의 암반변형계수 산정 연구

31 March 2001. pp. 27-35

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Abstract

Four road tunnels, which consists of biotite gneiss and granite gneiss and shows a similar geological conditions, were selected in this study. Laboratory and field tests, the rock mass rating for the four tunnels were conducted. A regression analysis was performed to find out the correlations of test results. It was proposed an equation of reduction factor which can assess the deformation modulus for biotite gneiss and granite gneiss. It was also found that there was a close correlation between Q and RQD in four tunnels according to the analysis between RMR and Q, RMR and RQD, Q and RQD and laboratory and field tests.

Keywords

Biotite gneiss

Granite gneiss

Regression

Deformation modulus

본 연구에서는 지질적 조건이 유사하고 흑운모편마암과 화강편마암이 기반암으로 구성되어있는 도로터널 4개소를 선정하여 실내•현장시험 및 암반분류를 실시하였다. 그 결과에 대한 회귀분석을 수행하여 각각에 대한 상호관계를 분석하였다. 또한 기반암으로 구성된 흑운모편마암과 화강편마암에 대한 실내시험결과를 활용하여 암반번형계수를 산정학 위한 감쇠지수 산정식을 제시하였다. 본 대상터널에서 RMR과 Q, RQD, 현장시험과 실내시험결과의 상관관계식에 대한 신뢰도를 분석하였다. 이들 분석에서 Q와 RQD의 상관관계가 가장 밀접한 것으로 확인되었다.

키워드

흑운모편마암

화강편마암

회귀분석

변형계수

References

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2. 한국도로공사 (1995), “고속도로 터널설계실무자료집”, pp. 111-127.

3. Kaser, P.K. (1980), "Effect of stress-history on the deformation behaviorof underground openings", 13th Canadian Rock Mechanics Symp., CIMM, Montreal, pp. 133∼.140

4. Jeremic, M. L. "Ground Mechanics in Hard Rock mining", Balkema, pp. 415∼.501

5. Bieniawski, Z.T., "Determination of rock mass deformability; Experience from case histories, Int. J. Rock Mech. Sci & Geomech. Abstr., pp. 237-247

6. Carmichael, R.S.(1989), "Practical Hand book of Physical Properties of Rocks and Minerals", pp. 139-209

7. Nicholson, G. A. and Bieniawski, Z. T. (1990), "A Nonliner Deformation modulus based on rock mass classification", Int. J. Min & Geological Eng, pp.181-202

8. Mohammad, N., Reddish, D. J., and Stance, L. R. (1997), "The relation between in situ and laboratory rock properties used in numerical modelling", Int.J. Rock Mech. Min. Sci & Geomech,Abstr., Vol.34, No2, pp. 181-202.

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 : 3
No :1
Pages :27-35

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

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