Numerical and experimental modelling of slope stability and seepage water of earthfill dam

• Autorzy: El-Hazek Alaa N. , Abdel-Mageed Neveen B. , Hadid Mohammed H.

Identyfikatory

DOI

10.24425/ jwld.2019.127046

• Języki publikacji: EN

Abstrakty

EN

In this paper, finite element modelling is employed for simulating and analysing seepage and slope stability of earthfill dam via GeoStudio software. Two products are employed, which are SLOPE/W for slope stability and SEEP/W for seepage analysis. The behaviour of earthfill dam with four different types of sandy soils having different values of hydraulic conductivity (K) has been studied. Different upstream (US) slopes of 1:2, 1:2.5, 1:3 and 1:3.5 for the earthfill dam are simulated. The downstream (DS) slope is constant at 1:2. The results showed for all the four types of soils that when the US slope is increased, the amount of seepage from the dam increases and the factor of safety (F) decreases. For each US slope, when K (type of soil) increases, both seepage and F increase. Fine sand soil is associated with less seepage and less F. Sixteen equations are obtained to predict both seepage and F with respect to US slope for each type of soil and K of the soil for US slope. An experimental model for earthfill dam is constructed in the laboratory of hydraulics, Benha University to investigate the seepage of water through earthfill dams. It is concluded that seepage decreased when K decreased, and when the US slope for each type of soil decreased. The seepage increased when K increased for each US slope. Seven equations are obtained to predict seepage with respect to US slope for each type of soil, and K for each US slope.

Słowa kluczowe

EN

earthfill dam; finite element modelling; GeoStudio; seepage; slope stability

• Wydawca: Wydawnictwo ITP
• Czasopismo: Journal of Water and Land Development
• Rocznik: 2020
• Tom: no. 44
• Strony: 55--64
• Opis fizyczny: Bibliogr. 32 poz., rys., tab.

Twórcy

autor

El-Hazek Alaa N.

• Benha University, Faculty of Engineering at Shoubra, Department of Civil Engineering, Cairo, Egypt

autor

Abdel-Mageed Neveen B.

• Benha University, Faculty of Engineering at Shoubra, Department of Civil Engineering, Cairo, Egypt

autor

Hadid Mohammed H.

• University of Technology, Building and Construction Engineering, 35010, Baghdad, Iraq

Bibliografia

• ABBAS J.M., ALJANABI Q.A., MUTINY Z.A. 2017. Slope stability analysis of an earth dam. Diyala Journal of Engineering Sciences. Vol. 10. No. 1 p. 106–117.
• ABDEL-GAWAD H.A.A., SHAMAA M.T. 2004. Seepage through earth dams with horizontal filters and founded on impervious foundation (numerical analysis with boundary element method). Alexandria Engineering Journal. Vol. 43. No. 6 p. 909–921.
• ADJIM H., DJEDID A. 2018. Drought and water mobilization in semi-arid zone: The example of Hammam Boughrara dam (North-West of Algeria). Journal of Water and Land Development. No. 37 p. 3–10. DOI 10.2478/jwld-2018-0019.
• ARSHAD I., BABAR M.M. 2014. Finite element analysis of seepage through an earthen dam by using Geo-Slope (SEEP/W) software. International Journal of Research (IJR). Vol. 1. Iss. 8 p. 619–634.
• BISHOP A.W. 1955. The use of the slip circle in the stability analysis of slopes. Geotechnique. Vol. 5. No. 1 p. 7–17.
• BISHOP A.W., MORGENSTERN N. 1960. Stability coefficients for earth slopes. Géotechnique. Vol. 10 p. 129–153.
• DURGA NAGA LAXMI DEVI D., ANBALAGAN R. 2017. Study on slope stability of earthen dams by using GeoStudio software. International Journal of Advance Research, Ideas and Innovations in Technology. Vol. 3. Iss. 6 p. 408–414.
• EL-HAZEK A.N. 2013. Cost of dams in Al-Baha Province, Kingdom of Saudi Arabia. Journal of Environmental Science and Engineering. Vol. 2. No. 2. DOI 10.17265/2162-5263/2013.02.003.
• EL-HAZEK A.N. 2014. Optimum water storage in Al-Baha, Kingdom of Saudi Arabia. American Journal of Environmental Engineering. Vol. 4. No. 2 p. 19–24. DOI 10.5923/j.ajee.20140402.01.
• FELLENIUS B.H. 2006. Basics of foundation design. Electronic Edition, Canada pp. 275.
• HASANI H., MAMIZADEH J., KARIMI H. 2013. Stability of slope and seepage analysis in earth fills dams using numerical models (Case study: Ilam DAM-Iran). World Applied Sciences Journal. Vol. 21 (9) p. 1398–1402. DOI 10.5829/idosi.wasj.2013.21.9.1313.
• HUSSAIN F., NABI G. 2016. Empirical formulae evaluation for hydraulic conductivity determination based on grain size analysis. Pyrex Journal of Research in Environmental Studies. Vol. 3. Iss. 3 p. 26–32.
• JAMEL A.A.J. 2016. Analysis and estimation of seepage through homogenous earth dam without filter. Diyala Journal of Engineering Sciences. Vol. 9. No. 2 p. 83–94. DOI 10.24237/djes.2016.09207.
• JANBU N. 1954. Stability analysis of slopes with dimensionless parameters. PhD Thesis. Cambridge. Harvard University pp. 81.
• KAMANBEDAST A., DELVARI A. 2012. Analysis of earth dam: Seepage and stability using Ansys and Geo-Studio software. World Applied Sciences Journal. Vol. 17. Iss. 9 p. 1087–1094.
• KANCHANA H.J., PRASANNA H.S. 2015. Adequacy of seepage analysis in core section of the earthen dam with different mix proportions. Aquatic Procedia. Vol. 4 p. 868–875. DOI 10.1016/j.aqpro.2015.02.109.
• KIRRA M.S., SHAHIEN M., ELSHEMY M., ZEIDAN B.A. 2015. Seepage and slope stability analysis of Mandali earth dam, Iraq: A case study. International Conference on Advances in Structural and Geotechnical Engineering (ICASGE’15). [6–9 April 2015 Hurghada, Egypt].
• KOKANEH S.P., MAHGSOODIAN S., ABASI H.M., KORDNAEIJ A. 2013. Seepage evaluation of an earth dam using Group Method of Data Handling (GMDH) type neural network: A case study. Scientific Research and Essays. Vol. 8. No. 3 p. 120–127.
• KULKARNI A.A., HANGARGEKAR P.A. 2017a. Comparison of SEEP/W simulation with observed seepage in earthen dam. International Journal of Engineering Sciences and Research Technology. Vol. 6. Iss. 2 p. 315–318. DOI 10.5281/zenodo.290266.
• KULKARNI A.A., HANGARGEKAR P.A. 2017b. Seepage analysis of Ujjani Dam using Geo-Studio software. International Journal for Scientific Research & Development. Vol. 4. Iss. 11 p. 531–536.
• LI Y., RAHARDJO H., IRVINE K.N. 2018. Seepage and deformation analyses in unsaturated soils using ANSYS. In: Proceedings of China-Europe Conference on Geotechnical Engineering. Vol. 1. Springer Series in Geo-mechanics and Geo-engineering. Springer p. 360–364. DOI 10.1007/978-3-319-97112-4_80.
• LI Z.W., YANG X.L. 2018. Stability of 3D slope under steady unsaturated flow condition. Engineering Geology. Vol. 242. No. 14 p. 150–159. DOI 10.1016/j.enggeo.2018.06.004.
• MA H., CHI F. 2016. Major technologies for safe construction of high earth-rock fill dams. Engineering. Vol. 2. Iss. 4 p. 498–509. DOI 10.1016/J.ENG.2016.04.001.
• MANDAL S., BANIK A., BAIRAGI P. 2018. Study on phreatic line of zoned type earthen dam with different earth material. International Journal for Scientific Research and Development. Vol. 6. Iss. 9 p. 34–38.
• OMOFUNMI O.E., KOLO J.G., OLADIPO A.S., DIABANA P.D., OJO A.S. 2017. A review on effects and control of seepage through earth-fill dam. Current Journal of Applied Science and Technology. Vol. 22. Iss. 5 p. 1–11. DOI 10.9734/CJAST/2017/28538.
• PAVAN N., BARNALI G., PRASAD S.K. 2016. Seepage analysis and seismic behavior of earthfill dam using GeoStudio. International Journal of Civil and Structural Engineering Research. Vol. 4 (1) p. 342–346.
• PHAM K., KIM D., CHOI H.J., LEE I.-M., CHOI H. 2018a. A numerical framework for infinite slope stability analysis under transient unsaturated seepage conditions. Engineering Geology. Vol. 243. Iss. 4 p. 36–49. DOI 10.1016/j.enggeo.2018.05.021.
• PHAM K., LEE H., KIM D., LEE I.-M., CHOI H. 2018b. Influence of hydraulic characteristics on stability of unsaturated slope under transient seepage conditions. Landslides. Vol. 15. Iss. 9 p. 1787–1799. DOI 10.1007/s10346-018-0989-x.
• SPENCER E. 1967. A method of analysis of the stability of embankments assuming parallel inter-slice forces. Géotechnique. Vol. 17. Iss. 1 p. 11–26. DOI 10.1680/geot.1967.17.1.11.
• ZEIDAN B.A. 1993. A numerical (FEM) study of the effect of anisotropy on phreatic seepage flows. PhD Thesis. Civil Engineering Department, Indian Institute of Technology IIT, Bombay. Powai, India.
• ZEIDAN B.A., SHAHIEN M., ELSHEMY M., KIRRA M.S. 2017. Combined seepage and slope stability analysis of failed earthen dams. 85 Annual Meeting of International Commission on Large Dams, Prague, Czech Republic p. 1–14.
• ZOBIRI M., MAZOUR M., MORSLI B. 2018. Water erosion on marl slopes and prevention of its effects using conservation of water and soil systems in the Wadi Isser watershed – Algeria. Journal of Water and Land Development. No. 37 p. 161–169. DOI 10.2478/jwld-2018-0035.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).