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Seepage Problem Through the Foundation of a Spillway with Selected Treatment Methods
Dept. of Dams and Water Resources Engineering, University of Anbar, Ramadi 31001, Iraq.
Dept. of Dams and Water Resources Engineering, University of Anbar, Ramadi 31001, Iraq.
Dept. of Dams and Water Resources Engineering, University of Anbar, Ramadi 31001, Iraq.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-6790-2653
2022 (English)In: Mathematical Modelling of Engineering Problems, ISSN 2369-0739, Vol. 9, no 3, p. 819-824Article in journal (Refereed) Published
Abstract [en]

One of the main concerns for engineers, during operation of dams, is uncontrolled seepage though the foundations of dams and hydraulic structures which is mainly resulted from poor geological conditions and lead to undermine erosion or piping that may endanger the safety of dam. In this study, numerical models were utilized to evaluate the excessive seepage problem underneath the spillway of Horan 2 Dam in Iraq as the seepage have led to dissipate storge and malfunction the dam. Two treatment methods were proposed to reduce the quantity of seepage by using a cutoff wall and a clay blanket. The results of the models indicated that the foundation of the spillway was unsafe against piping, as the calculated factor of safety was less than the allowable value. A clay blanket of 6 m long is recommended to sufficiently reduce the quantity of seepage and maintain the factor of safety within the allowable limits. As the cut off wall and clay blanket were used, the quantity of seepage decreased up to 73% and 96%, respectively, and the safety factor increased up to 100% and 110%, respectively. As discussed herein, using a clay blanket is the most cost-effective method comparing to using a cutoff wall.

Place, publisher, year, edition, pages
International Information and Engineering Technology Association , 2022. Vol. 9, no 3, p. 819-824
Keywords [en]
dam safety, numerical modeling, seepage, cutoff wall, clay blanket, SEEP/W
National Category
Water Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-92266DOI: 10.18280/mmep.090331Scopus ID: 2-s2.0-85133744162OAI: oai:DiVA.org:ltu-92266DiVA, id: diva2:1684929
Note

Godkänd;2022;Nivå 0;2022-07-29 (hanlid)

Available from: 2022-07-29 Created: 2022-07-29 Last updated: 2023-09-05Bibliographically approved

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Al-Ansari, Nadhir

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