Determination the Flow Net through Multi Layers Soil by Using the Hydraulic Modeling Method
American Journal of Civil Engineering
Volume 3, Issue 3, May 2015, Pages: 80-87
Received: Apr. 15, 2015;
Accepted: Apr. 27, 2015;
Published: May 9, 2015
Views 4654 Downloads 224
Hala Kathem Taeh Alnealy, Civil Engineering Department, Babylon University, Iraq
In this research the experimental method by using Hydraulic modelingused todetermination the flow net in order to analyses seepage flow through multi- layer soil foundation underneath hydraulic structure.as well as steady theconsequence ofthe 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 90º 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 90º that given value of redaction (31%) is beneficial in decreasing uplift pressure and quantity of seepage.
Hala Kathem Taeh Alnealy,
Determination the Flow Net through Multi Layers Soil by Using the Hydraulic Modeling Method, American Journal of Civil Engineering.
Vol. 3, No. 3,
2015, pp. 80-87.
Abourohim, M. A., (1992) "Experimental study for the effect of seepage past Hydraulic Structures on the uplift pressure along the floo", Alexandria Engineering Journal, Volume 31, Issue 1.
AL-Ganaini, M.A., (1984),“Hydraulic Structure”, Beirut,pp47-60, (In Arabic).
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.
Desai S.C. and Christian T.J. (1977). "Numerical methods in geotechnical engineering."McGraw-Hill Book Company, New York.
Zheng-yi F. and Jonathan T.H.(2006). "The epsilon method: analysis of seepage beneath an impervious dam with sheet pile on a layered soil."NRC Research Press, Canada Geotechnical Journal Volume 43, P59–69.
Aziz, L. J. (2008). “Lateral Resistance of Single Pile Embedded in Sand with Cavities.”D.Ph Thesis, University of Technology, Iraq.
EL-Fitiany, M. A. Abourohim, R. I. and El-Dakak, A. Y. (2003). "Three dimensional ground water seepage around a simplehydraulic structure." Alexandria Engineering Journal, Volume 42, Issue 5, September.
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.
AL-Kubaisy,Y.K.Y.,(2004), " Effect of Soil Nonlinearity and Construction Sequence on the Behavior of Sheet Pile Wall", Department of Building and Construction Eng.,University of Technology ,Iraq.
Das, B. M. (2008)."Advanced Soil Mechanics." Third Edition. Taylor and Francis, 270 Madison Ave, New York, NY 10016, USA