Evaluation of the Effect of Modulus of Elasticity in Clay Core on the Arching in the Crest of Earth Dams

Document Type : Original Article


1 MSc of Civil Engineering- Department of soil and foundation mechanic engineering- Tafresh University. tafresh. iran

2 Assistant professor of civil Engineering - Department of soil and foundation engineering - Tafresh university


The results of analysis of effect the modulus of elasticity (E) on the deposition changes are considerable. In practice, these factors can have an effect on displacement value and stress in the earth dam. Hence, the effect of this parameter on the unequal settlement and stress created in in the crest of dam is assessed using the finite element method (FEM). The results showed that by increasing the value of modulus of elasticity (E) of the clay core and decreasing the difference of modulus of elasticity in the clay core and modulus of elasticity of the crust, the vertical displacement value in the crest of dam is decreased notably. The results showed that by decreasing the difference between the modulus of elasticity (E) in clay core and crust, reaches to zero, the value of unequal settlement at the crest of dam decrease to less than 1 mm. When the modulus of elasticity (E) in clay core is less than 50% of the modulus of elasticity (E) crust, the arching increases.


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[1]     Khaksar Najafi E, Eslami A, Chegini A. Investigating indemnity caused by the interaction of water and soil on the technical buildings and control it optimized. fifth Natl. Congr. Civ. Eng. Ferdosi Univ. Mashhad (in Persian), 2010.
[2]     Sadrnejad SA. Earth dams and its numerical analysis. Shahid Rajaji teacher training University publish (in Persian); 2005.
[3]     Dutta SC, Roy R. A critical review on idealization and modeling for interaction among soil–foundation–structure system. Comput Struct 2002;80:1579–94. https://doi.org/10.1016/S0045-7949(02)00115-3.
[4]     Kramer S. Geotechnical Earthquake Engineering. Pearson; 1996.
[5]     Nejad BG, Soden P, Taiebat H, Murphy S. Seismic deformation analysis of a rockfill dam with a bituminous concrete core. IOP Conf Ser Mater Sci Eng 2010;10:012106. https://doi.org/10.1088/1757-899X/10/1/012106.
[6]     Nayebzadeh R, Mohammadi M. The Effect of Impervious Clay Core Shape on the Stability of Embankment Dams. Geotech Geol Eng 2011;29:627–35. https://doi.org/10.1007/s10706-011-9395-z.
[7]     Talebi M, Vahedifard F, Meehan CL. Effect of Geomechanical and Geometrical Factors on Soil Arching in Zoned Embankment Dams. Geo-Congress 2013, Reston, VA: American Society of Civil Engineers; 2013, p. 1056–65. https://doi.org/10.1061/9780784412787.107.
[8]     Moradi M, Shirgir V, Ghanbari A. An approximate equation for the estimation of arching due to the shape and hardness of valley in earth dams. Electron J Geotech Eng 2014;19:6343–52.
[9]     Ghafari A, Nikraz HR, Sanaeirad A. Finite element analysis of deformation and arching inside the core of embankment dams during construction. Aust J Civ Eng 2016;14:13–22. https://doi.org/10.1080/14488353.2015.1092639.
[10]   Rashidi M, Haeri SM. Evaluation of behaviors of earth and rockfill dams during construction and initial impounding using instrumentation data and numerical modeling. J Rock Mech Geotech Eng 2017;9:709–25. https://doi.org/10.1016/j.jrmge.2016.12.003.
[11]   Yu X, Zou D, Kong X, Yu L. Large-deformation finite element analysis of the interaction between concrete cut-off walls and high-plasticity clay in an earth core dam. Eng Comput 2017;34:1126–48. https://doi.org/10.1108/EC-04-2016-0118.
[12]   Feng S-J, Ai S-G, Chen HX. Estimation of arching effect in geosynthetic-reinforced structures. Comput Geotech 2017;87:188–97. https://doi.org/10.1016/j.compgeo.2017.02.014.
[13]   Rashidi M, Heidar M, Azizyan G. Numerical Analysis and Monitoring of an Embankment Dam During Construction and First Impounding (Case Study: Siah Sang Dam). Sci Iran 2017:0–0. https://doi.org/10.24200/sci.2017.4181.
[14]   Esmaeilzadeh M, Talkhablou M, Ganjalipour K. Arching Parametric Study on Earth Dams by Numerical Modeling: A Case Study on Darian Dam. Indian Geotech J 2018;48:728–45. https://doi.org/10.1007/s40098-017-0290-2.