Reza Mahin Roosta - PhD in Geotechnical Engineering, Head of Soil and Rock Mechanics Section,Mahab Ghodss Consulting Engineering Co, Tehran, Iran
Anahita Goudarzi - M.Sc.student in Soil Mechanics and Foundation Engineering, Sharif University of Technology, Tehran

Seepage and stability analyses of two cross-sections of concrete face rock-fill dams,homogeneous and zoned embankments, are investigated in the present study due to cracking of the concrete slab. Seepage and stability analyses are investigated by using software, Geostudio. Results of the analyses show that when crack develops in the face slab, the phreatic line under concrete slab starts from a point higher than the elevation of the crack. In this condition, stability analyses in the homogeneous dam shows that with increase in the crack height, safety factor of the slope decreases; while in non-homogeneous dams, phreatic line and safety factor do not change very much in accordance to the great capacity of drainage zone, which cause phreatic line to be at its lowest level

Concrete Face Rock-fill Dam, Crack, Numerical Modeling, Seepage, Soil Stability