Related Links
Numerical Modeling of Seepage Flow Behavior from Permeable Alluvial Foundations | ||
| تحقیقات مهندسی سازه های آبیاری و زهکشی | ||
| Article 7, Volume 16, Issue 65, January 2016, Pages 85-100 PDF (799.26 K) | ||
| Document Type: Original Article | ||
| DOI: 10.22092/aridse.2016.105703 | ||
| Abstract | ||
| The protection of agricultural lands from sea water intrusion in countries with low coasts is of great importance. The present study investigated a soil failure mechanism to measure seepage force by numerical simulation of a laboratory coastal dike in FLAC software using the finite difference method. The results indicate that the FLAC model properly simulated soil behavior. The model predicted boiling with high accuracy and it was possible to predict the heaving mechanism after use of blanket and sheet piles seepage control measures using the stress analysis before implementing the final design. The results show that it is possible to decrease the hydraulic gradient and, thus, risk of boiling by lengthening the flow path. The safety factor was determined using FLAC without the need for manual calculation. Terzaghi equations indicate that the safety factor against boiling depends on several geotechnical parameters. The safety factor was determined in FLAC by considering the geotechnical parameters of friction angle, angle of dilation, type of material, and angle of friction between the soil and sheet pile. | ||
| Keywords | ||
| Alluvial Foundation; Boiling; Effective Stress; Failure; Stability Coefficient Effervescence | ||
| References | ||
|
Anon. 2000. Fast Lagrangian Analysis of Continua (FLAC-2D). ITASCA Consulting Group, Inc. Minneapolis.
Barchard, J. 2002. Centrifuge modeling of piled embankments on soft soil. M. Sc. Thesis. Graduate Academic Unit of Civil Engineerin. University of Brunswick. USA.
Bear, J. 1972. Dynamics of Fluids in Porous Media. American Elsevier Publishing Company, Inc.
Benmebarek, N., Benmebarek, S. and Kastner, R. 2005. Numerical studies of seepage failure of sand within a cofferdam. Comput. Geotech. 32, 264-273.
Rahimi, H. 2002. Earth Dams. Tehran University Pub. Tehran, Iran. (in Persian)
Sedghi-Asl, M., Rahimi, H. and Khaleghi, H. 2010. Experimental analysis of seepage flow under coastal dikes. Exp. Tech. 34(4):49-54.
Sedghi-Asl, M., Rahimi, H. and Khaleghi, H. 2012. Laboratory investigation of the seepage control measures under coastal dikes. Exp. Tech. 36(1): 61-71.
Streeter, V. L. and Wylie, E. B. 1981. Fluid Mechanics. McGraw-Hill Book Company. New York.
Subramanian, N. 2008. Design of Steel Structures. Oxford University Press. USA.
Vermeer, P. A. and De Borst, R. 1984. Non-associated plasticity for soils, concrete and rock. Heron.
Wilkins, M. L. 1964. Fundamental Methods in Hydrodynamics. In: Alder, B., Fernbech, S. and Rotenberg, M. (Eds.) Methods in Computational Physics. Vol. 3. Academic Press. New York. | ||
|
Statistics Article View: 929 PDF Download: 655 |
||
Journal management system. designed by sinaweb