HE Breţice is the fifth in a chain of six hydroelectric power plants on the lower Sava.udApproximately 13 km of dikes will have to be built along the left and the right bank of theudSava river to create an accumulation reservoir. In my degree we examined the possibility touduse locally available sand deposits as the main fill material. The use of sand will represent theudenvironmentally and economically friendly solution. Because there is no experience inudbuilding dikes from sands in Slovenia and this sand has a reputation of being difficult to builduddikes from, we examined characteristics of sand and estimated its application in dikes. Weudexamined all index properties of sand, the compactibility, deformability, collapse, shearudstrength and permeability. The results of laboratory tests were verified by controludmeasurements at the experimental dike built of local sands. The analysis of the results showedudthat the sand could be used as fill material, however some requirements regarding theudachieved dry density and the use of filters layers to prevent piping must be fulfilled.
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