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http://dx.doi.org/10.14481/jkges.2016.17.1.29

Effect of Joint Spacing on the Earth Pressure Against the Support System in a Jointed Rock Mass  

Son, Moorak (Department of Civil Engineering, Daegu University)
Adedokun, Solomon (Department of Civil Engineering, Daegu University)
Publication Information
Journal of the Korean GEO-environmental Society / v.17, no.1, 2016 , pp. 29-37 More about this Journal
Abstract
This study examined the magnitude and distribution of earth pressure on the support system in a jointed rock mass due to the different joint spacing as well as varying the rock type and joint condition (joint shear strength and joint inclination angle). Based on a physical model test and its numerical simulation, a series of numerical parametric analyses were conducted using a discrete element method. The results showed that the magnitude and distribution of earth pressure were strongly affected by the different joint spacing as well as the rock type and joint condition. In addition, the study results were compared with Peck's earth pressure for soil ground, which indicated that the earth pressure in a jointed rock mass could be considerably different from that in soil ground. The study suggests that the joint spacing as well as the rock type and joint condition are important factors affecting the earth pressure in a jointed rock mass and they should be considered when designing a support system in a jointed rock mass.
Keywords
Rock excavation; Support system; Earth pressure; Joint spacing; Rock type; Joint condition;
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  • Reference
1 Bieniawski, Z. T. (1976), Rock mass classification in rock engineering, John Wiley & Sons, New York, pp. 97-106.
2 Chae, Y. S. and Moon, I. (1994), Earth pressure on retaining wall by considering local soil condition, Korean Geotechnical Society '94 fall conference paper, pp. 129-138 (in Korean).
3 Goodman R. E. (1989), Introduction to rock mechanics, Wiley & Sons, New York, pp. 179-217.
4 Hashash, Y. M. A. and Whittle, A. J. (2002), Mechanism of load transfer and arching for braced excavations in clay, Journal of Geoteh. and Geoenviron. Eng., Vol. 128, No. 3, pp. 187-197.   DOI
5 Hoek, E. and Brown, E. T. (1988), Underground excavations in rock, Institution of Mining and Metallurgy, London, pp. 131-178.
6 Jeong, E. T. and Kim, S. G. (1997), Case study of earth pressure distribution on excavation wall of multi-layered soil. Korean Geotechnical Society '97 spring conference paper, pp. 78-80 (in Korean).
7 Laio, S. S. C. and Neff, T. L. (1990), Estimating lateral earth pressure for design of excavation support, Proceedings, Design and Performance of earth retaining structures, ASCE special conference, Ithaca, New York, pp. 489-509.
8 Lambe, T. W. and Whitman, R. V. (1978), Soil mechanics, SI version, John Wiley & Sons Inc., New York, pp. 185-194.
9 Peck, R. B. (1969), Deep excavations and tunneling in soft ground. state-of-the-art report, Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering, Mexico City, State-of-the Art Volume, pp. 225-290.
10 Potts, D. M. and Fourie, A. B. (1986), A numerical study of the effect of wall deformation on earth pressures. Intern. Journal of Numerical Ana. Methods in Geomech. Vol. 10, No. 4, pp. 383-405.   DOI
11 Son, M. (2013), Earth pressure on the support system in jointed rock mass, Canadian Geotech. Journal, Vol. 50, No. 5, pp. 493-502.   DOI
12 Son, M. and Adedokun, S. I. (2015). Effect of support characteristics on the earth pressure in a jointed rock mass, Canadian Geotech. Journal, Vol. 52, No. 12, pp. 1956-1967.   DOI
13 Son, M. and Park, J. (2014), Physical model test and numerical simulation of excavation walls in jointed rock masses, Canadian Geotech. Journal, Vol. 51, No. 5, pp. 554-569.   DOI
14 Tschebotarioff, G. P. (1973), Foundations, Retaining and Earth Structures. 2nd Ed., MGH, pp. 35-90.
15 Universal Distinct Element Code (UDEC, 2004), User's Manual, Itasca Consulting Group, Minneapolis, Minnesota, U.S.A, pp. 1-100.
16 Wong, I. H., Poh, T. Y. and Chuah, H. L. (1997), Performance of excavations for depressed expressway in Singapore, Journal of Geoteh. and Geoenviron. Eng., Vol. 123, No. 7, pp. 617-625.   DOI
17 Worden, F. T. and Achmus, M. (2013), Numerical modeling of three-dimensional active earth pressure acting on rigid walls, Computer and Geotechnics, Vol. 51, pp. 83-90.   DOI
18 Yoo, C. S. and Kim, Y. J. (2000), Deep excavation in soil, including rock with layers on retaining wall and apparent horizontal displacement of earth pressure, Journal of Korean Geotechnical Society, Vol. 16, No. 4, pp. 43-50 (in Korean).