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Evaluation of Stability of Quay Wall Considering Overtopping of Tsunami

지진해일파의 월파를 고려한 해안안벽의 안정성평가

  • Lee, Kwang-Ho (Industry and Academia Cooperation Foundation, Kwandong Univ.) ;
  • Kim, Do-Sam (Dept. of Civil Engineering, Korea Maritime Univ.) ;
  • Kim, Tae-Hyung (Dept. of Civil Engineering, Korea Maritime Univ.)
  • 이광호 (관동대학교 산학협력단) ;
  • 김도삼 (한국해양대학교 토목공학과) ;
  • 김태형 (한국해양대학교 토목공학과)
  • Received : 2012.03.13
  • Accepted : 2012.08.24
  • Published : 2012.09.28

Abstract

This study was conducted to estimate the stability of a quay wall in case of wave overtopping under the combined action of an earthquake and tsunami using limit equilibrium method. The tsunami force was calculated by using a numerical program called TWOPM-3D (3-D one-field Model for immiscible TWO-Phase flows). Especially, the wave force acting behind the quay wall after a tsunami wave overtopping was estimated by treating back fill as a permeable material. The stability of the quay wall was assessed for both the sliding and overturning modes under passive and active conditions. The variation in the stability of the quay wall with time was determined by parametric studies, including those for the tsunami wave height, seismic acceleration coefficient, internal friction angle of the soil, wall friction angle, and pore water pressure ratio. When the earthquake and tsunami were considered simultaneously, the tsunami induced wave overtopping increased the stability of the quay wall under the passive condition, but in the active condition, the safety factors decreased.

본 연구에서는 월파시 해안안벽에 작용하는 지진과 지진해일의 영향에 대하여 한계평형상태해석법을 적용하여 안정성을 검토하였다. 지진해일파력에 대하여 TWOPM-3D를 적용하였으며, 특히 안벽의 뒷채움재를 투과성재료로 가정하여 지진해일파가 월파 후에 안벽배후에 작용하는 파력을 산정하였다. 그리고, 수동상태와 주동상태 조건에서 해안안벽의 안정성에 영향을 주는 요인인 지진해일파고, 뒷채움재의 수위, 수평 수직지진가속도계수, 내부마찰각, 벽마찰각, 간극수압비 등을 변화하여 활동과 전도에 대한 안벽 안전율의 변화특성을 시간에 따라 검토하였다. 이로부터 지진과 지진해일파의 작용하에 지진해일파가 안벽을 월파하는 경우 수동상태에 대한 안전율은 결과적으로 안전율을 증가시키는 요인으로 작용하는 반면, 주동상태에 대하여 결과적으로 안전율을 감소시키는 요인으로 작용함을 확인할 수 있었다.

Keywords

References

  1. Kim, D. -S. (2011), Coastal Environmental Engineering, Goomibook (In Korean).
  2. Lee, K. -H., Lee, S. -K., Shin, D. -H., and Kim, D. -S. (2008), 3-Dimensional analysis for nonlinear wave forces acting on dual vertical columns and their nonlinear wave transformations, Journal of Korean Society of Coastal and Ocean Engineers, Vol.20, No.1, pp.1-13 (In Korean).
  3. Lee, K. -H., Ha, S. -W., Lee, K. -S., Kim, D. -S., and Kim, T. -H. (2011), Evaluation of the stability of quay wall under the earthquake and tsunami, Journal of the Korean Geotechnical Society, Vol.27, No.3, pp.41-54 (In Korean).
  4. Lee, K. -H., Tomita, T., Kawasaki, K., Nakamura, T., and Suzuki, S. (2011), Survey of the 2011 Tohoku earthquake tsunami disaster, The Magazine of the Korean Society of Civil Engineers, KSCE, Vo1.59, No.11, pp.59-66 (In Korean).
  5. Akiyama, M. and Aritomi, M. (2002), Advanced numerical analysis of two-phase flow dynamics multidimensional flow analysis, corona Publishing Co., LTD. Tokyo, Japan.
  6. Asakura, R., Iwase, K., Ikeya, T., Takao, M., Kaneto, T., Fujii, N., and Omori, M. (2000), "An experimental study on wave force acting on on-shore structures due to overflowing tsunamis", Proc. of Coastal Engrg., JSCE, Vol.47, pp.911-915. https://doi.org/10.2208/proce1989.47.911
  7. Chakrabarti, S., Husak, A. D., Christiano, P. P., and Troxell, D. E. (1978), "Development of seismic design criteria for category I cofferdams", Nuclear Engineering and Design., Vol.45, pp.277-283. https://doi.org/10.1016/0029-5493(78)90123-1
  8. Choudhury, D. and Ahmad, S. M. (2007a), "Design of waterfront retaining wall for the passive case under earthquake and tsunami", Applied Ocean Reaserch., Vol.29, pp.37-44. https://doi.org/10.1016/j.apor.2007.08.001
  9. Choudhury, D. and Ahmad, S. M. (2007b), "Stability of waterfront retaining wall subjected to pseudo-static earthquake forces", Ocean Engrg., Vol.34, pp.1947-1954. https://doi.org/10.1016/j.oceaneng.2007.03.005
  10. Choudhury, D. and Nimbalkar, S. (2005), "Seismic passive resistance by pseudo-dynamic method", Geotechnique. Vol.55, No.7, pp.699-702. https://doi.org/10.1680/geot.2005.55.9.699
  11. Choudhury, D., Sitharam, T. G., and Subba Rao, K. S. (2004), "Seismic design of earth retaining structures and foundations", Current Science., Vol.87, pp.1417-1425.
  12. Choudhury, D. and Subba Rao, K. S. (2002), "Seismic passive resistance in soils for negative wall friction", Canadian Geotechnical Journal., Vol.39, pp.971-981. https://doi.org/10.1139/t02-023
  13. Ebeling, R. M. and Morison, E. E. Jr. (1992), The seismic design of waterfront retaining structures. US Army Technical Report ITL-92-11.
  14. Kim, S., Jang, I., Chung, C., and Kim, M. (2005), "Evaluation of seismic displacements of quay walls", Proceedings of the international conference on geotechnical engineering for disaster mitigation & rehabilitation, pp.84-93.
  15. Kramer, S. L. (1996), Geotechnical earthquake engineering. New Jersey : Pearson Education Inc.
  16. Matsuo, H. and Ohara, S. (1960), "Lateral earthquake pressure and stability of quay walls during earthquake.", Proc. of second world conference on earthquake engineering, pp.165-173.
  17. Mononobe, N. and Matsuo, H. (1929), "On the determination of earth pressures during earthquakes", Proc. of the world engineering congress, pp.177-185.
  18. Morrison, E. E. and Ebeling, R. M. (1995), "Limit equilibrium computation of dynamic passive earth pressure", Canadian Geotechnical Journal, Vol.32, pp.481-487. https://doi.org/10.1139/t95-050
  19. Nozu, A., Ichii, K., and Sugano, T. (2004), "Seismic design of port structures", Journal of Japan Association for Earthquake Engineering, Vol.4, No.3 (special issue), pp.195-208. https://doi.org/10.5610/jaee.4.3_195
  20. Okabe, S. (1926), "General theory of earth pressure and seismic stability of retaining wall and dam", Proceedings of the Japanese Society of Civil Engineers, Vol.10, No.6, pp.1277-1324.
  21. Richeds Jr, R. and Elms, D. G. (1979), "Seismic behavior of gravity retaining walls.", Journal of Geotechnical Engineering ASCE, Vol.105, No.4, pp.449-469.
  22. Shih, R. (1990), "Permeability characteristics of rubble material-new formula", Proceedings of 22nd Coastal Engineering International Conference, Delft, Netherlands, pp.1499-1512.
  23. Shuto, N. and Matsutomi, H. (1995), "Field survey of the 1993 Hokkaido Nansei-Oki earthquake tsunami", Pure and Appl. Geophysics, Vol.144, No.3/4, pp.649-663. https://doi.org/10.1007/BF00874388
  24. Westergaard, H. M. (1933), "Water pressures on dams during earthquakes", Transactions of ASCE., Vol.98, pp.418-433.
  25. Yeh, H. (2006), "Maximum fluid forces in the tsunami runup zone", J. of Waterway, Port, Coastal, and Ocean Engrg, ASCE, Vol.132, No.6, pp.496-500. https://doi.org/10.1061/(ASCE)0733-950X(2006)132:6(496)

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  1. Quay Wall Stability Considering Earthquake and Tsunami Overtopping Forces Together in the Active Condition vol.15, pp.4, 2014, https://doi.org/10.1061/(ASCE)NH.1527-6996.0000151