Liquefaction of Non-Homogeneous Earth Dams’ Heels by Variations of Depth and Thickness of Non-Compacted Foundation Layer

Liquefaction usually occurs in saturated loose sandy soils. The aim of the present study is to examine liquefaction of earth dams’ heels due to a non-compacted saturated layer (a liquefiable layer) within the foundation of earth dams with different thicknesses and depths during an earthquake. For this purpose, a non-homogenous earth dam was founded on a compact soil layer. Analysis was performed with the help of QUAKE/W. The special feature of QUAKE/W is the ability to display liquefiable zones. The results showed that simultaneous increase in the thickness and depth of the liquefiable foundation layer will reduce the liquefaction potential. The declining trend becomes more critical with increasing the thickness of liquefiable layer.