Browse > Article
http://dx.doi.org/10.7843/kgs.2015.31.12.59

Effect of Joint Sets on the Earth Pressure against the Support System in a Jointed Rock Mass  

Son, Moorak (Dept. of Civil Engrg., Daegu Univ.)
Adedokun, Solomon (Dept. of Civil Engrg., Daegu Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.31, no.12, 2015 , pp. 59-69 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 sets 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 induced earth pressure was affected significantly by a joint set depending on the inclusion of the joint inclination angle, which induces a joint sliding condition, but the number of joint sets alone was not important, even though the earth pressure could be increased slightly as the number of joint sets is increased. 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 effects of joint sets as well as 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 set; Rock type; Joint condition;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Liao, 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.
2 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.
3 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
4 Son, M. (2013), "Earth Pressure on the Support System in Jointed Rock Mass", Canadian Geotech. Journal, Vol.50, No.5, pp.493-502.   DOI
5 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
6 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
7 Tschebotarioff, G. P. (1973), Foundations, Retaining and Earth Structures. 2nd Ed., MGH.
8 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
9 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
10 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.
11 Chae, Y. S. and Moon, I. (1997), "Earth Pressure on Retaining Wall by Considering Local Soil. Condition", Korean Geotechnical Society '94 Fall Conference Paper, pp.129-138.
12 Haahash, 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
13 Itasca Consulting Group, Inc. (2004), Universal Distinct Element Code, User's Manual, Minneapolis, Minnesota, U.S.A
14 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.
15 Lambe, T. W. and Whitman, R. V. (1978), Soil mechanics, SI version, John Wiley & Sons Inc., New York.