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Experimental and Numerical Modeling of Nano-clay Effect on Seepage Rate in Earth Dams

  • Poorya TaghvaeiEmail author
  • Seyed Farhad Mousavi
  • Ali Shahnazari
  • Hojjat Karami
  • Issa Shoshpash
Original Paper
  • 20 Downloads

Abstract

Earth dams control and store river water. Type of the earth dam is selected on the basis of available borrow sources. Where it is not possible to have access to suitable fine-grained sources for constructing an earth dam, then using homogeneous materials and an impermeable blanket is recommended. In this research, a mixture of sandy soil with 0.25, 0.5, 0.75, and 1 wt% of montmorillonite nano-clay was used to make the impermeable blanket. After initial tests of gradation, permeability, and optimum moisture content on the soils, experimental models of homogeneous earth dam with an impermeable blanket were constructed. The time needed to reach the steady-state phreatic line and seepage discharge in the models was compared in transient and unsaturated cases. Results showed that increasing the amount of nano-clay from 0.25 to 1.0%, decreased seepage discharge by 19, 67, 89, and 97%, respectively, compared to the control model. Then, a numerical model of the earth dam was prepared using SEEP/W software and was validated with the experimental results. Results of measured and modeled phreatic lines indicated that the numerical model is accurate enough. Results of sensitivity analysis for blanket thickness showed that seepage rate in 0.5% nano-clay model was 9.46 × 10−6, 8.93 × 10−6, and 8.01 × 10−6 m3/s and in 1.0% nano-clay model was 2.1 × 10−6, 1.44 × 10−6, and 7.80 × 10−7 m3/s for 3, 5, and 10 cm blankets, respectively. In general, using a blanket with small amount of nano-clay on the reservoir side of the earth dam could alleviate seepage problems.

Keywords

Hydraulic conductivity Montmorillonite nano-clay Seepage Sandy soil Earth dam 

References

  1. 1.
    Guo X, Baroth J, Dias D, Simon A (2018) An analytical model for the monitoring of pore water pressure inside embankment dams. Eng Struct 160:356–365CrossRefGoogle Scholar
  2. 2.
    Volz C, Frank PJ, Vetsch DF, Hager WH, Boes RM (2017) Numerical embankment breach modelling including seepage flow effects. J Hydraul Res 55(4):480–490CrossRefGoogle Scholar
  3. 3.
    Gan L, Shen XZ, Qing WW (2017) Seepage analysis of concrete face rockfill dam for material damage of water stop structure. Key Eng Mater 729:93–98CrossRefGoogle Scholar
  4. 4.
    Tan X, Wang X, Khoshnevisan S, Hou X, Zha F (2017) Seepage analysis of earth dams considering spatial variability of hydraulic parameters. Eng Geol 228:260–269CrossRefGoogle Scholar
  5. 5.
    Yuan S, Zhong H (2016) Three dimensional analysis of unconfined seepage in earth dams by the weak form quadrature element method. J Hydrol 533:403–411CrossRefGoogle Scholar
  6. 6.
    Touri RAZ, Pourbakhshian S, Pouraminian M (2015) Experimental and numerical study of the effect of PET recycling admixtures on pore water pressure and output discharge. Homogen Earth Dams 5(1):31–34Google Scholar
  7. 7.
    Sivakumar Babu GL, Vasudevan AK (2008) Seepage velocity and piping resistance of coir fiber mixed soils. J Irrig Drain Eng 134(4):485–492CrossRefGoogle Scholar
  8. 8.
    Yang KH, Adilehou WM, Jian ST, Hsiung BC (2018) Experimental study of fiber-reinforced sand subject to seepage. In Proceedings of the 2nd international symposium on Asia urban geoengineering. Springer, Singapore, pp. 49–62Google Scholar
  9. 9.
    Haman DZ, Smajstrla AG, Zazueta FS, Clark GA (1990) Selecting a method for sealing ponds in Florida. Institute of Food and Agricultural Sciences, University of Florida. Gainesville FL. Extension Circular, 870Google Scholar
  10. 10.
    Mousavi SF, Moazzeni M, Mostafazadeh-Fard B, Yazdani MR (2012) Effects of rice straw incorporation on some physical characteristics of paddy soils. J Agric Sci Technol 14(5):1173–1183Google Scholar
  11. 11.
    Lentz RD (2015) Polyacrylamide and biopolymer effects on flocculation, aggregate stability, and water seepage in a silt loam. Geoderma 241:289–294CrossRefGoogle Scholar
  12. 12.
    Majeed ZH, Taha MR (2013) A review of stabilization of soils by using nanomaterials. Aust J Basic Appl Sci 7(2):576–581Google Scholar
  13. 13.
    Mohammadi M, Niazian M (2013) Investigation of nano-clay effect on geotechnical properties of Rasht clay. J Adv Sci Technol 3(3):37–46Google Scholar
  14. 14.
    Abbasi N, Farjad A, Sepehri S (2018) The use of nanoclay particles for stabilization of dispersive clayey soils. Geotech Geol Eng 36(1):327–335CrossRefGoogle Scholar
  15. 15.
    Ng CWW, Coo JL (2014) Hydraulic conductivity of clay mixed with nanomaterials. Can Geotech J 52(6):808–811CrossRefGoogle Scholar
  16. 16.
    Salemi N, Abtahi SM, Rowshanzamir M, Hejazi SM (2016) A study on the hydraulic performance of sandwich geosynthetic clay liners reinforced with nano-clay particles. J Sandwich Struct Mate 18(6):693–711CrossRefGoogle Scholar
  17. 17.
    Kananizadeh N, Ebadi T, Khoshniat SA, Mousavirizi SE (2011) The positive effects of nanoclay on the hydraulic conductivity of compacted Kahrizak clay permeated with landfill leachate. Clean Soil Air Water 39(7):605–611CrossRefGoogle Scholar
  18. 18.
    Taha MR, Taha OME (2012) Influence of nano-material on the expansive and shrinkage soil behavior. J Nanopar Res 14(10):1190CrossRefGoogle Scholar
  19. 19.
    Neethu SV, Remya S (2013) Engineering behaviour of nanoclays stabilized soil. In Proceedings of Indian geotechnical conference. Roorkee, pp. 22–24Google Scholar
  20. 20.
    Bahari M, Shahnazari A (2015) Experimental study of the fine-grained earthen bed stabilization using nanoclay. JWSS 19(72):107–114CrossRefGoogle Scholar
  21. 21.
    Stephens T (2010) Manual on small earth dams: a guide to siting, design and construction (No. 64). Food and Agriculture Organization of the United Nations (FAO)Google Scholar
  22. 22.
    Fu JF, Jin S (2009) A study on unsteady seepage flow through dam. J Hydrodyn 21(4):499–504CrossRefGoogle Scholar
  23. 23.
    Engemoen B (2014) Design Standards No. 13, Earth dam Dams, Chap. 8: Seepage Phase 4 (Final). U.S. Department of Interior, Bureau of ReclamationGoogle Scholar
  24. 24.
    GeoStudio (2009) Seepage modeling with SEEP/W—an engineering methodology, 4th Edition. GEO-SLOPE International Ltd, CalgaryGoogle Scholar
  25. 25.
    Van Genuchten MT (1980) A closed-form equation for predicting the hydraulic conductivity of unsaturated soils 1. Soil Sci Soc Am J 44(5):892–898CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Department of Hydraulic StructuresSemnan UniversitySemnanIran
  2. 2.Department of IrrigationSari Agricultural Sciences and Natural Resources UniversitySariIran
  3. 3.Faculty of Civil EngineeringBabol University of TechnologyBabolIran

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