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Numerical Simulation of Groundwater Discharge Into a Tunnel
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  • Journal title : The Journal of Engineering Geology
  • Volume 25, Issue 3,  2015, pp.369-376
  • Publisher : The Korea Society of Engineering Gelolgy
  • DOI : 10.9720/kseg.2015.3.369
 Title & Authors
Numerical Simulation of Groundwater Discharge Into a Tunnel
Jeong, Jae-Hyeon; Koo, Min-Ho;
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 Abstract
Numerical models simulating groundwater flow are often used to estimate groundwater discharge into a tunnel. In designing numerical models, the grid size should be carefully considered to ensure that groundwater discharge is accurately predicted. However, several recent studies have employed various grid sizes without providing an adequate explanation for their choice. This paper suggests the optimal grid size based on a comparison of numerical models with analytical solutions. Discrepancies between numerical and analytical solutions result from the effect of model boundaries as well as the grid size. By nullifying boundary effects, the errors solely associated with the grid size could be analyzed. The optimal grid size yielding accurate numerical solutions was thus derived. The suggested relationship between tunnel radius and optimal grid size is analogous to the relationship between the equivalent well block radius and grid size.
 Keywords
tunnel;groundwater flow;numerical model;grid size;
 Language
Korean
 Cited by
 References
1.
Cha, J. H., Na, H. N., and Koo, M., 2005, Modeling transient change of the groundwater flow system by tunnel excavation, Proceedings of KoSSGE 2005 Spring Conference, 389-392.

2.
Choi, M. J., Lee, J. Y., Koo, M., and Lee, K. K., 2004, A comparative study on groundwater flow depending on conceptual models in tunnel modeling, The Journal of Engineering Geology, 14(2), 223-233 (in Korean with English abstract).

3.
Chung, S. Y., Kim, B. W., Kang, D. W., Shim, B. O., and Cheong, S. W., 2007, Analyses of hydrology and groundwater level fluctuation in granite aquifer with tunnel excavation, The Journal of Engineering Geology, 17(4), 635-645 (in Korean with English abstract).

4.
Dershowitz, W., Lee, G., and Geier, J., 1991, FracMan version 2.3, Interactive discrete feature data analysis, geometric modelling, and exploration simulation, User Documentation, Golder Associates Inc., Redmond, Washington.

5.
Goodman, R. E., Moye, D. G., Van Schalkwyk, A., and Javandel, I., 1964, Ground water inflows during tunnel driving, College of Engineering, University of California Geology.

6.
Jeong, B. S., 2003, Transient groundwater flow modeling for tunnel excavation using the MODFLOW program, MSc Thesis, Kongju National University, Kongju, Korea, 1-84 (in Korean with English abstract).

7.
Ji, H. S., 2002, A Study on drainage characteristics of micro tunnel in metamorphic rock mass, MSc Thesis, Dongguk University, Seoul, Korea, 1-81 (in Korea with English abstact).

8.
Kim, S. M., 2011, Hydraulic and hydrological study on the change in groundwater level during tunnel construction, Journal of Korean Tunnelling and Underground Space Association, 13(2), 97-114 (in Korean with English abstract).

9.
Korea Environment Institute (KEI), 2005, A Study on mitigation plan for environmental impacts of groundwater in tunnel, KEI, Seoul, Korea, 148 (in Korean).

10.
Lee, B. D., Choo, C. O., Lee, B. J., Cho, B. W., Hamm, S. Y., and Im, H. C., 2003, Numerical modeling on the prediction of groundwater recovery in the Youngchun area, Kyungbook Province, Economic and environmental geology, 36(6), 431-440 (in Korean with English abstract).

11.
Lee, B. D., Sung, I. H., Jeong, C. H., and Kim, Y. J., 2005, Modeling on prediction of flow rate and groundwater level drawdown associated with tunnel excavation in fractured rock, The Journal of Engineering Geology, 15(3), 289-301 (in Korean with English abstract).

12.
Lee, J. H., Hamm, S. Y., Cheong, J. Y., Jeong, J. H., Kim, N. H., Kim, K. S., and Jeon, H. T., 2009, Estimation of groundwater flow rate into Jikri tunnel using groundwater fluctuation data and modeling, Journal of Soil and Groundwater Environment, 14(5), 29-40 (in Korean with English abstract).

13.
Lee, J. H., Hamm, S. Y., Cheong, J. Y., Jeong, J. H., Park, S. K., Kim, N. H., and Kim, G. B., 2010, Numerical simulation of the change in groundwater level due to construction of the Giheung Tunnel, The Journal of Engineering Geology, 20(4), 449-459 (in Korean with English abstract).

14.
Lee, J. H., Yoo, H. S., Lee, Y. S. and Park, C. S., 2004a, Case study of environmental impact assessment about groundwater outflow during railroad tunnel construction, Proceedings of The Korean Society for Railway 2004 Spring Conference, 303-308 (in Korean with English abstract).

15.
Lee, Y. S., Kwon, Y. W., and Bae, G. J., 2004b, A study on the environmental effect due to tunnel excavation, Journal of the Korean Geoenvironmental Society, 5(4), 81-91 (in Korean with English abstract).

16.
Lei, S., 1999, An analytical solution for steady flow into a tunnel, Ground Water, 37(1), 23-26. crossref(new window)

17.
Lim, H. G. and Chang, Y. Y., 2008, Study on the impact of tunnel construction on geo-environment - simulation study on the Gyerong tunnel -, Journal of Soil and Groundwater Environment, 13(5), 88-95 (in Korean with English abstract).

18.
McDonald, M. G. and Harbaugh, A. W., 1988, A modular three-dimensional finite-difference ground-water flow model, U.S. Geological Survey Techniques of Water-Resources Investigations, Book 6, Chap. Al, 83-875.

19.
Park, S. H., 2007, The change analysis of groundwater flow system produced by tunnel excavation in an unconfined aquifer, MSc Thesis, Kangwon National University, Kangwon, Korea, 171 (in Korean with English abstract).

20.
Peaceman, D. W., 1978, Interpretation of well-block pressures in numerical reservoir simulation, Society of Petroleum Engineers Journal, 18(3), 183-194. crossref(new window)

21.
Polubarinova-Kochina, P. Ya., 1962, Theory of ground water movement (Translated by R.J.M. De Wiest), New Jersey, Princeton University.