Abstract
Synopsis This Paper describes the procedures used in the construction of the impervious core of the Holjes dam in western Sweden and the results of tests and control measures. The dam is a combined earth and rock-fill structure with a steeply sloping core of impervious earth. The height is 81 m above lowest foundation rock or 68 m above stream bed. The high annual rainfall, about 750 mm, and low annual evaporation, about 260 mm, together with the snow-melt in this region produces a high moisture content in impervious materials, sometimes making it necessary to take special measures to ensure satisfactory compaction of the fill. At Holjes the successful drainage of the material in the borrow pit was important in maintaining construction schedules during wet summers. Field tests were made to find out how the permeability and density were affected by stone size, stone content, layer thickness and type of compaction. Methods of extracting stones and of determining fill density were also investigated. Cet arti...
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