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Experimental and Numerical Analysis for Earth-Fill Dam Seepage
Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia.ORCID iD: 0000-0003-2150-6396
Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia.
Department of Irrigation and Hydraulics, Faculty of Engineering, Alexandria University, Alexandria, Egypt. Department of Civil Engineering, College of Engineering, Qassim University, Buraydah, Saudi Arabia.
Institute of Research and Development, Duy Tan University, Da Nang, Vietnam.
2020 (English)In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 12, no 6, p. 1-14, article id 2490Article in journal (Refereed) Published
Abstract [en]

Earth-fill dams are the most common types of dam and the most economical choice. However, they are more vulnerable to internal erosion and piping due to seepage problems that are the main causes of dam failure. In this study, the seepage through earth-fill dams was investigated using physical, mathematical, and numerical models. Results from the three methods revealed that both mathematical calculations using L. Casagrande solutions and the SEEP /Wnumerical model have a plotted seepage line compatible with the observed seepage line in the physical model. However,when the seepage flow intersected the downstream slope and when piping took place, the use of SEEP /Wto calculate the flow rate became useless as it was unable to calculate the volume of water flow in pipes. This was revealed by the big dierence in results between physical and numerical models in the first physical model, while the results were compatible in the second physical model when the seepage line stayed within the body of the dam and low compacted soil was adopted. Seepage analysis for seven dierent configurations of an earth-fill dam was conducted using the SEEP /W model at normal and maximum water levels to find the most appropriate configuration among them. The seven dam configurations consisted of four homogenous dams and three zoned dams. Seepage analysis revealed that if sucient quantity of silty sand soil is available around the proposed dam location, a homogenous earth-fill dam with a medium drain length of 0.5 m thickness is the best design configuration. Otherwise, a zoned earth-fill dam with a central core and 1:0.5 Horizontal to Vertical ratio (H:V) is preferred.

Place, publisher, year, edition, pages
Switzerland: MDPI, 2020. Vol. 12, no 6, p. 1-14, article id 2490
Keywords [en]
Seepage, Earth-fill dam, Experimental analysis, Numerical analysis, SEEP/Wmodel, Dam safety and sustainabilty
National Category
Geotechnical Engineering
Soil Mechanics
Identifiers
ISI: 000523751400337Scopus ID: 2-s2.0-85082850058OAI: oai:DiVA.org:ltu-78139DiVA, id: diva2:1416195
Note

Available from: 2020-03-22 Created: 2020-03-22 Last updated: 2020-04-22Bibliographically approved

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Al-Janabi, Ahmed Mohammed SamiAl-Ansari, NadhirYaseen, Zaher Mundher
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Cite
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