Effect of Filter Properties on Controlling Cracks and Erosion in Dam Embankment

Abstract

This study, shows how a laboratory simulation is the best method to granular filter design. It was found that many factors like, grain shape, fine content, etc. affect the soil-filter behavior. Later in this paper these factors are explained. This research to investigate the ability of filters to stop cracks, has many principal elements: Development of a laboratory filter test device for testing composite specimens with cracks formed through base soil.  Development of procedures for processing base and filter materials, in order to have precise control over their grain-size distribution. Performing tests on composite specimen to explore: The effect of the grain shape on the ability of a filter to fill a crack and stop Erosion Mechanisms in dams. The effect of the percentage of fines in the filter material on the ability of a filter to fill a crack.It was found that the best percentage of fines in the filter about 3% to 5 % to to fill a crack. And the round grain shape is better to stop Erosion Mechanisms in dams. Presents the main research findings and conclusions of the research study with   the recommendation of an improved filter design guideline. It also presents some future directions in this field.