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http://dx.doi.org/10.14481/jkges.2019.20.1.43

Effect of the Height of the Slope on the Topology Optimization of Soilnail  

Cho, Chungsik (Department of Civil Engineering, University of Seoul)
Song, Youngsu (Geotech Engineering Co., Ltd.)
Publication Information
Journal of the Korean GEO-environmental Society / v.20, no.1, 2019 , pp. 43-49 More about this Journal
Abstract
In this paper, we introduced phase optimization techniques in the Soil-Nail design to optimize the reinforcement required for each grade level. The optimal design results at the maximum slope height were further amplified to allow for phase optimization of the horizontal spacing of the Nail in accordance with the change in the height of the slope. The limit equilibrium analysis was performed by step-by-step sloping height, and the safety factor exceeded when the horizontal spacing of four days was fixed. The process of optimization was effectively carried out by densifying the required reinforcement depending on the slope elevation. Also limited to reflect the axial force of the nail into the reinforcement details.Using the method, the members' strength was reflected. When phase optimization technique is applied for each slope height by calculating the stiffening precision, it is judged that it will be more economical to optimize horizontal intervals by effectively reducing the repeated reinterpretation process that satisfies the reference safety ratio for each slope height.
Keywords
Limit equilibrium analysis; Finite element method; Soil-Nail; Horizontal spacing; Shape density; Topology optimization;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Bendsoe, M. P. and Sigmund, O. (2004), Topology optimization; theory, methods, and applications, Springer, Berlin Heidelberg, Vol. 11, No. 4, pp. 355-388.
2 Bishop, A. W. (1955), The use of slip circle in the stability analysis of slopes, Geotechnique, Vol. 5, pp. 7-17.   DOI
3 Chun, B. S., Kim, W. C. and Yoon, C. K. (2004), The effects of nail inclination in soil nailing by finite element analysis, Journal of the Korean Geotechnical Society, Vol. 20 No. 6, pp. 19-27 (In Korean).
4 Chun, B. S. and Lim, H. S. (1998), SOIL NAILING, Yurim publishers, 348p (In Korean).
5 Duncan, J. M. (1996), State of the art: limit equilibrium and finite elemant analysis of slopes, Journal of Geotechnical Engineering, Vol. 122, No. 7, pp. 577-596.   DOI
6 Han, S. Y. (2001), On topology optimization technique, Journal of the Korean Machine Tool Engineers Society, Vol. 10, No. 3, pp. 52-57 (In Korean).
7 Hong, W. P. and Song, Y. S. (2006), An experimental study on the stabilizing effect of nails against sliding, Journal of the Korean Geotechnical Society, Vol. 22, No. 2, pp. 5-17 (In Korean).
8 Juran, I., Baudrand, G., Fraarag, K. and Elias, V. (1990), Kinematical limit analysis for design of soil naild structure, Journal of Geotechnical Engineering, ASCE, pp. 54-72.
9 Kim, H. T. and Kang, I. K. (1995), A study on the optimum design method for soil nailing system, Journal of the Korean Geotechnical Society, pp. V-13-V-18 (In Korean).
10 Kim, M. S., Sagong, M. and Kim, S. S. (2007), Slope stability analysis under rainfall condition by using multiple slip surfaces, Journal of the Korean Geoenvironmental Society, Vol. 8, No. 2, pp. 11-18 (In Korean).
11 Kim, N. K., Jung, J. H., Ju, Y. S. and Kim, S. K. (2008), Modified FHWA design method considering bending stiffness of soil nail, Journal of the Korean Geotechnical Society, pp. 1406-1416 (In Korean).
12 Yoo, N. J., Kim, Y. G. and Park, B. S. (2001), Centrifuge model tests on the behavior and failure mechanism of soil nailing systems under surcharges, Journal of the Korean Geotechnical Society, Vol. 17, No. 5, pp. 5-16 (In Korean).
13 Kim, W. C., Chun, B. S. and Park, S. Y. (2003), A study on the design application of soil nailed wall analysis programs using field data, Journal of the Korean Geoenvironmental Society, Vol. 2003, pp. 233-240 (In Korean).
14 Park, C. S., An, S. J., Kim, J. H. and Park, J. T. (2015), A study on the safety factor of slopes by slope-heights, Journal of the Korean Civil Engineers Society, pp. 199-200 (In Korean).
15 Shen, C. K., Bang, S., Herrmann, L. R. and Rornstad, K. M. (1978), A reinforced lateral earth support system, Proc. of the Symposium on Earth Reinforcement, ASCE, Apr., pp. 764-793.
16 Ministry of Land, Transport and Maritime Affairs (2016), Design Criteria for Slope of Construction Projects, 122p (In Korean).
17 MIDAS IT (2013), Midas GTS NX manual-Analysis reference, MIDAS Information Technology co., Ltd (In Korean).