Experimental method to determine “Face slab dispatch” under the concrete face slab

Abstract

   “Face slab dispatch” is the phenomenon of appearing gaps under the concrete face slab of concrete faced rock-fill dam (CFRD) due to deformation of dam body and buffer layers. “Face slab dispatch” is particularly serious because this phenomenon can lead to the redistribution of stress and change the working mechanism of the concrete face slab leading to the reduce of waterproofing and longevity of the construction. More seriously, “face slab dispatch” can lead to the collapse of the upstream concrete face slab, then collapsing the dam. The paper presents simulation results of empirical method to determine "face slab dispatch" by numerical model to test the feasibility of the proposed method