Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam

Najm Obaid Salim Alghazali; Hala Kathem Taeh Alnealy

doi:doi:10.11648/j.ajce.20150303.12

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Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam

Najm Obaid Salim Alghazali, Hala Kathem Taeh Alnealy

Published in American Journal of Civil Engineering (Volume 3, Issue 3)

Received: 23 March 2015 Accepted: 1 April 2015 Published: 9 April 2015

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Abstract

In this research the experimental method by using Hydraulic modeling used to determination the flow net in order to analyses seepage flow through single- layer soil foundation underneath hydraulic structure. As well as steady the consequence of the cut-off inclination angle on exit gradient, factor of safety, uplift pressure and quantity of seepage by using seepage tank were designed in the laboratory with proper dimensions with two cutoffs. The physical model (seepage tank) was designed in two downstream cutoff angles, which are (90, and 120°) and upstream cutoff angles (90, 45, 120°). After steady state flow the flow line is constructed by dye injection in the soil from the upstream side in front view of the seepage tank, and the equipotential line can be constructed by piezometer fixed to measure the total head. From the result It is concluded that using downstream cut-off inclined towards the downstream side with Ө equal 120º that given value of redaction (25%) is beneficial in increasing the safety factor against the piping phenomenon. Using upstream cut-off inclined towards the downstream side with Ө equal 45º that given value of redaction (52%) is beneficial in decreasing uplift pressure and quantity of seepage.

Published in	American Journal of Civil Engineering (Volume 3, Issue 3)
DOI	10.11648/j.ajce.20150303.12
Page(s)	64-69
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

Flow Net, Inclined Cutoff, Seepage Tank, Single Layer, Soil

References

[1]	AL-Ganaini, M.A., (1984), “Hydraulic Structure”, Beirut, pp47-60, (In Arabic).
[2]	Selim, M.A., (1947) “Dams on Porous Media”, Transaction ASCE, Vol. 1 Roy, S.K. (2010). "Experimental Study On Different Types Of Seepage Flow Under The Sheet Pile Through Indigenous Model.” M.Sc. Thesis Insoil Mechanics and Foundation Engineering, University Of Jadavpur.12, pp 488-526.
[3]	Arslan, C. A. And Mohammad, S. A. (2011)."Experimental and Theoretical Study for Pizometric Head Distribution under Hydraulic Structures." Department of Civil engineering; College of engineering, University of kirkuk Volume 6, No.
[4]	EL-Fitiany, M. A. Abourohim, R. I. And El-Dakak, A. Y. (2003). "Three dimensional ground water seepage around a simple hydraulic structure." Alexandria Engineering Journal, Volume 42, Issue 5, September.
[5]	Roy, S.K. (2010). "Experimental Study On Different Types Of Seepage Flow Under The Sheet Pile Through Indigenous Model.", M.Sc. Thesis Insoil Mechanics and Foundation Engineering, University Of Jadavpur
[6]	Aziz, L. J. (2008). “Lateral Resistance of Single Pile Embedded in Sand with Cavities.", D.Ph Thesis, University of Technology, Iraq.
[7]	Khasaf, S. I.(1998). "Numerical Analysis of Seepage Problems with Flow Control Devices Underneath Hydraulic Structures." Ph.D. Thesis in Water Resources Engineering, University of Technology.
[8]	U.S. Bureau of Reclamation.(1977). " Design of Small Dams." A Water Resources Technical Publication, Washington, DC.
[9]	HM 169 (2011). "Drainage and Seepage Tank."Experiment Instructions Equipment for Engineering Education G.U.N.T. Gerätebau GmbH, Barsbüttel, Germany.
[10]	Harr, M.E.(1962). "Groundwater and seepage." McGraw-Hill Book Company.

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APA Style

Najm Obaid Salim Alghazali, Hala Kathem Taeh Alnealy. (2015). Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam. American Journal of Civil Engineering, 3(3), 64-69. https://doi.org/10.11648/j.ajce.20150303.12

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ACS Style

Najm Obaid Salim Alghazali; Hala Kathem Taeh Alnealy. Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam. Am. J. Civ. Eng. 2015, 3(3), 64-69. doi: 10.11648/j.ajce.20150303.12

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AMA Style

Najm Obaid Salim Alghazali, Hala Kathem Taeh Alnealy. Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam. Am J Civ Eng. 2015;3(3):64-69. doi: 10.11648/j.ajce.20150303.12

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@article{10.11648/j.ajce.20150303.12,
  author = {Najm Obaid Salim Alghazali and Hala Kathem Taeh Alnealy},
  title = {Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam},
  journal = {American Journal of Civil Engineering},
  volume = {3},
  number = {3},
  pages = {64-69},
  doi = {10.11648/j.ajce.20150303.12},
  url = {https://doi.org/10.11648/j.ajce.20150303.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajce.20150303.12},
  abstract = {In this research the experimental method by using Hydraulic modeling used to determination the flow net in order to analyses seepage flow through single- layer soil foundation underneath hydraulic structure. As well as steady the consequence of the cut-off inclination angle on exit gradient, factor of safety, uplift pressure and quantity of seepage by using seepage tank were designed in the laboratory with proper dimensions with two cutoffs. The physical model (seepage tank) was designed in two downstream cutoff angles, which are (90, and 120°) and upstream cutoff angles (90, 45, 120°). After steady state flow the flow line is constructed by dye injection in the soil from the upstream side in front view of the seepage tank, and the equipotential line can be constructed by piezometer fixed to measure the total head. From the result It is concluded that using downstream cut-off inclined towards the downstream side with Ө equal 120º that given value of redaction (25%) is beneficial in increasing the safety factor against the piping phenomenon. Using upstream cut-off inclined towards the downstream side with Ө equal 45º that given value of redaction (52%) is beneficial in decreasing uplift pressure and quantity of seepage.},
 year = {2015}
}

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TY  - JOUR
T1  - Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam
AU  - Najm Obaid Salim Alghazali
AU  - Hala Kathem Taeh Alnealy
Y1  - 2015/04/09
PY  - 2015
N1  - https://doi.org/10.11648/j.ajce.20150303.12
DO  - 10.11648/j.ajce.20150303.12
T2  - American Journal of Civil Engineering
JF  - American Journal of Civil Engineering
JO  - American Journal of Civil Engineering
SP  - 64
EP  - 69
PB  - Science Publishing Group
SN  - 2330-8737
UR  - https://doi.org/10.11648/j.ajce.20150303.12
AB  - In this research the experimental method by using Hydraulic modeling used to determination the flow net in order to analyses seepage flow through single- layer soil foundation underneath hydraulic structure. As well as steady the consequence of the cut-off inclination angle on exit gradient, factor of safety, uplift pressure and quantity of seepage by using seepage tank were designed in the laboratory with proper dimensions with two cutoffs. The physical model (seepage tank) was designed in two downstream cutoff angles, which are (90, and 120°) and upstream cutoff angles (90, 45, 120°). After steady state flow the flow line is constructed by dye injection in the soil from the upstream side in front view of the seepage tank, and the equipotential line can be constructed by piezometer fixed to measure the total head. From the result It is concluded that using downstream cut-off inclined towards the downstream side with Ө equal 120º that given value of redaction (25%) is beneficial in increasing the safety factor against the piping phenomenon. Using upstream cut-off inclined towards the downstream side with Ө equal 45º that given value of redaction (52%) is beneficial in decreasing uplift pressure and quantity of seepage.
VL  - 3
IS  - 3
ER  -

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Author Information

Najm Obaid Salim Alghazali

Corresponding author, Asst. Prof. Doctor, Civil Engineering Department, Babylon University, Iraq
Hala Kathem Taeh Alnealy

M. Sc. Student, Civil Engineering Department, Babylon University, Iraq

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APA Style

Najm Obaid Salim Alghazali, Hala Kathem Taeh Alnealy. (2015). Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam. American Journal of Civil Engineering, 3(3), 64-69. https://doi.org/10.11648/j.ajce.20150303.12

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ACS Style

Najm Obaid Salim Alghazali; Hala Kathem Taeh Alnealy. Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam. Am. J. Civ. Eng. 2015, 3(3), 64-69. doi: 10.11648/j.ajce.20150303.12

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AMA Style

Najm Obaid Salim Alghazali, Hala Kathem Taeh Alnealy. Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam. Am J Civ Eng. 2015;3(3):64-69. doi: 10.11648/j.ajce.20150303.12

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@article{10.11648/j.ajce.20150303.12,
  author = {Najm Obaid Salim Alghazali and Hala Kathem Taeh Alnealy},
  title = {Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam},
  journal = {American Journal of Civil Engineering},
  volume = {3},
  number = {3},
  pages = {64-69},
  doi = {10.11648/j.ajce.20150303.12},
  url = {https://doi.org/10.11648/j.ajce.20150303.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajce.20150303.12},
  abstract = {In this research the experimental method by using Hydraulic modeling used to determination the flow net in order to analyses seepage flow through single- layer soil foundation underneath hydraulic structure. As well as steady the consequence of the cut-off inclination angle on exit gradient, factor of safety, uplift pressure and quantity of seepage by using seepage tank were designed in the laboratory with proper dimensions with two cutoffs. The physical model (seepage tank) was designed in two downstream cutoff angles, which are (90, and 120°) and upstream cutoff angles (90, 45, 120°). After steady state flow the flow line is constructed by dye injection in the soil from the upstream side in front view of the seepage tank, and the equipotential line can be constructed by piezometer fixed to measure the total head. From the result It is concluded that using downstream cut-off inclined towards the downstream side with Ө equal 120º that given value of redaction (25%) is beneficial in increasing the safety factor against the piping phenomenon. Using upstream cut-off inclined towards the downstream side with Ө equal 45º that given value of redaction (52%) is beneficial in decreasing uplift pressure and quantity of seepage.},
 year = {2015}
}

Copy | Download

TY  - JOUR
T1  - Experimental Analysis of Seepage in Soil Beneath a Model of a Gravity Dam
AU  - Najm Obaid Salim Alghazali
AU  - Hala Kathem Taeh Alnealy
Y1  - 2015/04/09
PY  - 2015
N1  - https://doi.org/10.11648/j.ajce.20150303.12
DO  - 10.11648/j.ajce.20150303.12
T2  - American Journal of Civil Engineering
JF  - American Journal of Civil Engineering
JO  - American Journal of Civil Engineering
SP  - 64
EP  - 69
PB  - Science Publishing Group
SN  - 2330-8737
UR  - https://doi.org/10.11648/j.ajce.20150303.12
AB  - In this research the experimental method by using Hydraulic modeling used to determination the flow net in order to analyses seepage flow through single- layer soil foundation underneath hydraulic structure. As well as steady the consequence of the cut-off inclination angle on exit gradient, factor of safety, uplift pressure and quantity of seepage by using seepage tank were designed in the laboratory with proper dimensions with two cutoffs. The physical model (seepage tank) was designed in two downstream cutoff angles, which are (90, and 120°) and upstream cutoff angles (90, 45, 120°). After steady state flow the flow line is constructed by dye injection in the soil from the upstream side in front view of the seepage tank, and the equipotential line can be constructed by piezometer fixed to measure the total head. From the result It is concluded that using downstream cut-off inclined towards the downstream side with Ө equal 120º that given value of redaction (25%) is beneficial in increasing the safety factor against the piping phenomenon. Using upstream cut-off inclined towards the downstream side with Ө equal 45º that given value of redaction (52%) is beneficial in decreasing uplift pressure and quantity of seepage.
VL  - 3
IS  - 3
ER  -

Copy | Download