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http://dx.doi.org/10.12652/Ksce.2011.31.2C.083

Estimation of Elastic Modulus in Rock Mass for Assessing Displacment in Rock Tunnel  

Son, Moorak (대구대학교 토목공학과)
Li, Sudan (중국 강소성 만성직단)
Lee, Wonki (대구대학교 토목공학과)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.31, no.2C, 2011 , pp. 83-92 More about this Journal
Abstract
Elastic modulus in rockmass is an important factor to represent the characteristic of rock deformation and is used to estimate the displacement due to tunnel excavation. Nevertheless, the study to estimate the elastic modulus, which condisiders the rock type and joint characteristics (joint shear strength and joint inclination angle), has been done in less frequency. Accordingly, this study is aimed at providing the method to estimate the elastic modulus of rockmass in the various rock and joint conditons and the results grasped from the study. For this purpose, the 2D discrete numerical analysis will be carried out and the displacements due to tunnel excavation will be investigated with the consideration of rock and joint conditions. Then the displacement results will be used to estimate the elastic modulus of rockmass in which rock and joint conditions are considered with the utilization of the elastic theory of circular tunnel. The results of elastic modulus, which considers the conditions of various rock and joint, would be expected to have a great practical use in field.
Keywords
elstic modulsu; rock tunnel; excavation; joint characteristics; displacement;
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1 Barton, N. R. (1976) The shear strength of rock and rock joints, Int. J. Mech. Min. Sci. & Geomech. Abstr. Vol. 13, No. 10, pp. 1-24.   DOI
2 Bieniawski, Z. T. (1976) Rock mass classification in rock engineering, John Wiley& Sons, NY.
3 Bieniawski, Z. T. (1978) Determining rock mass deformability: Experience from case histories. Int. J. Rock Mechanics Miner. Sci. and Geomechanics Abstr., Vol. 15, No. 5, pp. 237-247.   DOI   ScienceOn
4 Bienniawski, Z. T. (1989) Engineering Rock Mass Classification, John Wiley & Sons, NY.
5 Clerici, A. (1993) Indirect determination of the modulus of deformation of rock masses-case histories. Proc. Symp. EUROCK, Rotterdam, A. A. Balkema, Eds. L. M. Riberio e Sousa, and N. F. Grossman, pp. 509-517.
6 Coulson, J. H. (1970) The Effects of Surface Roughness on the Shear Strength of Joints in Rock, Ph.D Dissertation, Univ. of Illinois at Urbana-Champaign.
7 Goodman, R. E. (1989) Introduction to rock mechanics. John Wiley & Sons, New York.
8 Grimstad, E. and Barton, N. (1993) Updating the Q-system for NMT. Proc. Int. Symp. on Sprayed Concrete, Fagernes, Norwegian Concrete Association, Norway, pp. 44-66.
9 Hoek, E. and Brown, E. T. (1980) Underground Excavations in Rock, Institution of Mining and Metallurgy, London.
10 Hoek, E. and Brown, E. T. (1998), Practical estimates of rock mass strength. Int. J. Rock Mech. Min. Sci. Vol. 34, No. 8, pp. 1165-1186.
11 Kirsch, G. (1898) Die theorie der elastizitat und die bedurfnisse der festigkeitslehre, Veit. Ver. Deut. Ing., Vol. 42, No. 28, pp 797-807.
12 Palmstrom, A. (1996) Characterizing rock masses by the RMi for use in practical rock engineering, Part 1: the development of the rock mass index (RMi), Tunneling and Underground Space Technology, Vol. 11, No. 2, pp. 175-186.   DOI
13 Palmstrom, A. and Singh, R. (2001) The deformation modulus of rock masses-comparisons between in situ tests and indirect estimates, Tunnelling and Underground Space Technology, Vol. 16, pp. 115-131.   DOI   ScienceOn
14 Serafim, J. L. and Pereira, J. P. (1983) Considerations on the Geomechanical Classification of Bieniawski, Proc. Symp. on Engineering Geology and Underground Openings, Lisboa, pp. 1133-1144.
15 UDEC User's Manual. (2004) ITASCA Consulting Group, Minnesota, U.S.A 2004.