Skip to main content
main-content
Top

Hint

Swipe to navigate through the articles of this issue

01-03-2019 | Original Paper | Issue 1/2019

International Journal of Geosynthetics and Ground Engineering 1/2019

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

Journal:
International Journal of Geosynthetics and Ground Engineering > Issue 1/2019
Authors:
Poorya Taghvaei, Seyed Farhad Mousavi, Ali Shahnazari, Hojjat Karami, Issa Shoshpash

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.

Please log in to get access to this content

To get access to this content you need the following product:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 69.000 Bücher
  • über 500 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 50.000 Bücher
  • über 380 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Maschinenbau + Werkstoffe




Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Wirtschaft"

Online-Abonnement

Mit Springer Professional "Wirtschaft" erhalten Sie Zugriff auf:

  • über 58.000 Bücher
  • über 300 Zeitschriften

aus folgenden Fachgebieten:

  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Versicherung + Risiko




Testen Sie jetzt 30 Tage kostenlos.

Literature
About this article

Other articles of this Issue 1/2019

International Journal of Geosynthetics and Ground Engineering 1/2019 Go to the issue