Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
권호 표지

The Stability Evaluation of Concrete Face Rockfill Dam(CFRD) Using Settlement Measured at the Dam Crest and Kelvin Model

계측자료 및 Kelvin 모델에 의한 콘크리트 표면차수벽형 석괴댐(CFRD)의 안정성 평가

  • Lee, Heeman (Dept. of Geotechnical & Tunnel Engineering, Dohwa Engineering Co., Ltd.) ;
  • Lim, Heuidae (Dept. of Civil Engineering, Chungnam National University) ;
  • Cho, Gyechun (Dept. of Civil and Environmental Engineering, KAIST) ;
  • Song, Kiil (Dept. of Civil Engineering, Inha University)
  • Published : 2013.11.01
⟨ Previous Next ⟩

Abstract

Recently, the projects which are to increase the capacity of the flood control are being actively performed because of the abnormal climate changes throughout the country. In this study, the regression analysis was performed using both Kelvin model and the real settlement measured at the crest of the existing concrete face rockfill dam(CFRD) to estimate the long-term deformation behavior characteristics such as creep which occurs without additional load. In addition, the effects on changes in physical properties (E, G, K) of the dam construction materials by deformation characteristics of the dam were evaluated, and the reasonable stability analysis method of the dam was proposed to obtain the long-term stability considering the changes in physical properties induced by the long-term deformation behavior in case of heightening the existing dams.

본 연구는 최근 기상이변의 영향으로 활발히 진행 중인 댐 치수능력사업의 일환으로, 운영 중인 콘크리트 표면차수벽형석괴댐(Concrete Face Rockfill Dam, CFRD)에서 측정된 계측결과와 시간 의존적 점탄성모델인 Kelvin 모델을 회귀분석하여 댐완공 이후 추가적인 하중증가 없이도 발생되고 있는 크리프(Creep)와 같은 댐의 장기 변형특성을 예측하고, 이와 같은 댐의 변형특성이 댐 제체를 구성하는 재료의 물리적 특성치(E, G, K) 변화에 미치는 영향을 분석하였다. 또한 댐의 장기적인 변형거동에 따른 물리적 특성치 변화가 댐 안정성에 미치는 영향과 댐 증고 시 댐의 장기적인 안정성 확보를 위한 합리적인 댐 안정성 평가방법을 제시하였다.

Keywords

References

  1. 국토해양부(2011), 댐설계기준, 국토해양부, pp. 103-115.
  2. 이인모(2005), 암반역학의 원리, 새론출판사, pp. 211-216.
  3. 한국수자원공사(2003), 평화의댐 증축(2단계) 사업 실시설계 보고서, pp. 25-47.
  4. 한국수자원공사(2012), 평화의댐 치수능력증대 건설공사 기본 설계보고서 부록 V(토질 및 지반조사보고서 설계편), 한국수자원공사, pp. 21-76.
  5. 한국수자원학회(2011), 댐설계기준.해설, (주)건설교통저널, pp. 303-351.
  6. Clements, R. P.(1984), Post-construction deformation of rock-fill dams, Journal of Geotechnical Engineering, Vol. 110, No. 7, pp. 821-840. https://doi.org/10.1061/(ASCE)0733-9410(1984)110:7(821)
  7. Cooke, J. B. and Sherard, J. L.(1987), Concrete-face rockfill dam: II. design, Journal of Geotechnical Engineering, Vol. 113, No. 10, pp. 1113-1132. https://doi.org/10.1061/(ASCE)0733-9410(1987)113:10(1113)
  8. Das, B. M.(1997), Advanced soil mechanics, Taylor and Fransis, London, pp. 11-54.
  9. DiMaggio, F. L. and Sandler, I. S.(1971), Material model for granular soils, Journal of Engineering Mechanics Division, Vol. 97, No. EM3, pp. 935-950.
  10. Duncan, J. M. and Chang, C. Y.(1970), Nonlinear analysis of stress and strain in soils, Journal of Soil Mechanics and Foundations Division, Vol. 96, No. SM5, pp. 1629-1653.
  11. Duncan, J. M., Wong, K. S. and Mabry, P.(1980), Strength, stress-strain and bulk modulus parameters for finite element analyses of stresses and movements in soil masses, Geotechnical Engineering Report No. UCB/GT/80-01, University of California, Berkeley, pp. 1-65.
  12. Eringen, A. C.(1962), Nonlinear theory of continuous media, McGraw-Hill, New York, pp. 1-477.
  13. Khalid, S., Singh, B., Nayak, G. C. and Jain, O. P.(1990), Nonlinear analysis of concrete face rockfill dam, Journal of Geotechnical Engineering, Vol. 116, No. 5, pp. 822-837. https://doi.org/10.1061/(ASCE)0733-9410(1990)116:5(822)
  14. Kim, H., Chung, K. J., Lee, W. G. and Jang, J. R.(2003), A case study on deformation characteristics of concrete face rockfill dam, Proceeding of Korean Geotechnical Society Spring Conference, pp. 111-116 (in Korean).
  15. Kim, S. K. and Lim, H. D.(1987), Finite element analysis on the behavior of Soyanggang dam and its comparison with observed, Journal of Korean Society of Civil Engineers, Vol. 7, No. 1, pp. 141-150 (in Korean).
  16. Kim, Y. S., Choi, J. S., Won, M. S. and Lee, H. H.(2009), A study on the deformation behavior of post-construction grest settlement, face slab deformation, and leakage of concrete faced rockfill dams, Journal of Korean Geosynthetics Society, Vol. 8, No. 2, pp. 31-39 (in Korean).
  17. Kondner, R. L.(1963), Hyperbolic stress-strain response: soils, Journal of Soil Mechanics and Foundations Division, Vol. 89, No. SM1, pp. 115-143.
  18. Marachi, N. D., Chan, C. K. and Seed, H. B.(1972), Evaluation of properties of rockfill materials, Journal of Soil Mechanics & Foundations Division, Vol. 8, No. M1, pp. 95-114.
  19. Mroz, Z.(1967), On the description of anisotropic work hardening, Journal of Mechanics and Physics of Solids, Vol. 15, No. 3, pp. 163-175. https://doi.org/10.1016/0022-5096(67)90030-0
  20. Roscoe, K. H. and Burland, J. B.(1968), On the generalized stress-strain behaviour of wet clay, engineering plasticity, J. Heyman and F. A. Leckie (Eds.), Cambridge University Press, Cambridge, pp. 535-609.
  21. Shin D. H.(2003), Experimental study on deformation properties of bedding zone materials bearing the concrete face Slab of CFRD, Proceeding of Korean Society of Civil Engineers, pp. 3724-3727 (in Korean).
  22. Truesdell, C.(1955), Hypoelasticity, Journal of Rational Mechanics and Analysis, Vol. 4, No. 3, pp. 83-133.