Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
권호 표지
DOI QR코드

DOI QR Code

Seepage Characteristics of Agricultural Reservoir Embankment Considering Filter Interval

필터간격을 고려한 농업용저수지 제체의 침투특성

  • Lee, Young Hak (Institute of Agricultural Science, Chungnam National University) ;
  • Lee, Dal Won (Dept. of Agricultural and Rural Engineering, Chungnam National University)
  • Received : 2017.09.25
  • Accepted : 2017.11.02
  • Published : 2018.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

This study analyzed pore water pressure, seepage and leakage quantity, height of seepage and critical hydraulic gradient in order to suggest the seepage characteristics of agricultural reservoir embankment considering filter interval. The seepage characteristics of a deteriorated reservoir embankments were conducted according to the horizontal filter intervals range using three- dimensional finite element analysis. The wider the horizontal filter interval, the higher the pore water pressure increased, and the pore water pressure ratio in the center of the core has a greater effect than the base part. The seepage and leakage quantity appeared largely in the two-dimensional analysis conditions (case 1), where the filter was constructed totally in the longitudinal direction of the embankment, the wider the horizontal filter interval was gradually reduced. The reasonable filter intervals to yield efficient seepage characteristics were within 30 m for the pore water pressure of the core and the height of the seepage line. The stability of the filter installation was able to evaluate the stability of the piping by the critical hydraulic gradient method. The deteriorated reservoir with no filters or decreased functionality can significantly reduce the possibility of piping by simply installing a filter on the downstream slope. In the future, the deteriorated reservoir embankment should be checked for the reservoir remodeling because the core and filter functions have been lost or decreased significantly. In the case of a new installation, the seepage characteristic behavior due to the core and filter changes should be applied to the field after obtaining a reasonable horizontal filter interval that satisfies the safety factor by a three-dimensional analysis.

Keywords

References

  1. Chahar, B. R., 2004. Determination of length of a horizontal drain in homogeneous earth dams. Journal of Irrigation and Drainage Engineering : 530-536. doi: 10.1061/(ASCE)0733-9437(2004)130:6(530)
  2. Chapuis, R. P. and M. Aubertin, 2001. A simplified method to estimate saturated and unsaturated seepage through dikes under steady state conditions. Canadian Geotechnical Journal 38: 1321-1328. doi: 10.1139/cgj-38-6-1321.
  3. Chen, Q. and L. M. Zhang, 2006. Three-dimensional analysis of water infiltration into the Gouhou rock fill dam using saturated unsaturated seepage theory. Canadian Geotechnical Journal 43(5): 449-461. doi:10.1139 /T06-011. https://doi.org/10.1139/T06-011
  4. Federal Emergency Management Agency (FEMA), 2011. Filter for embankment dams: Best practice for design and construction. U.S. Department of Homeland Security.
  5. Fell, R., C. F. Wan, J. Cyganiewicz, and M. Foster, 2003. Time for development of internal erosion and piping in embankment dams. J. of Geotechnical and Geoenvironmental Engineering 129(4) : 307-310. doi:10.1061/(ASCE)1090-0241(2003)129:4(307).
  6. Foster, M. A., R. Fell, and M. Spannagle, 2000. The statistics of embankment dam failures and accidents. Canadian Geotechnical Journal 37: 1000-1024. https://doi.org/10.1139/t00-030
  7. Japan Institute of Construction Engineering (JICE), 2012. Guide for structure investigation of river embankments.
  8. Korea Rural Community Corporation (KRC), 2011. The final report of embankment heightening project the Gyeryong reservoir (in Korean).
  9. Lee, D. W. and J. J. Noh, 2014. Behavior of failure agricultural reservoirs embankment reinforced by geotextile under overtopping condition. Journal of Korean Society of Agricultural Engineers 56(2): 59-64. doi:10.5389/KSAE .2014.56.2.059 (in Korean).
  10. Lee, K. S., D. W. Lee, and Y. H. Lee, 2016. Safety evaluation of agricultural reservoirs due to raising embankment by field monitoring and numerical analysis. Journal of Korean Society of Agricultural Engineers 58(2): 31-44. doi:10.5389/KSAE.2016.58.2.031 (in Korean).
  11. Lee, Y. H. and D. W. Lee, 2017. Effective method for remodeling of deteriorated agricultural reservoirs. Journal of Korean Society of Agricultural Engineers 59(4): 43-52. doi:10.5389/KSAE.2017.59.4.043. (in Korean).
  12. MIDAS Information Technology Corporation LTD, 2015. Midas geotechnical and tunnel analysis system (Midas GTS) (in Korean).
  13. Ministry of Agriculture, Food and Rural Affairs (MAFRA), 2002. Design standards of agricultural production infrastructure improvement project (Fill Dam) (in Korean).
  14. Minister of Land, Transport and Maritime Affairs (MLTM), 2011. Guidelines for dam design (in Korean).
  15. Natural Resources Conservation Service (NRCS), 2007. Filter diaphragms. U.S. Department of Agriculture. National Engineering Handbook. Washing- ton, DC.
  16. Terzaghi, K., 1943. Theoretical soil mechanics. John Wiley and Sons, 235-264.
  17. United States Army Corps of Engineers (USACE), 2004. General design and construction considerations for earth and rock-fill dams. Appendix B. Filter design.
  18. United State Bureau of Reclamation (USBR), 2007. Design standards No. 13: Embankment dams. U.S. Department of Interior. Technical Service Center. Denver, CO.
  19. Wang, G. S., C. H. Tan, M. S. Tsay, and H. C. Kao, 2013. 3-d seepage analysis of earth dam-case study of Pao-shan second reservoir in Taiwan. International Society of Offshore and Polar Engineers (ISOPE).
  20. Yarahmadi, N., S. R. Khodashenas, and S. Ansan, 2015. A comparison between two and three dimensional seepage analysis results in earth dams using SEEP/W and SEEP/3D (Case study: Shian and Khaan-Abad Dams). Eco. Env. and Cons. 21(1): 585-592.