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A laboratory research was undertaken to study the penetration of
coarse aggregate into soft seabed where they are used as embankment material. The samples of disturbed soft soil are prepared mixing a number of natural clays and water. The effects of separators, such as sandy layers and geosynthetics, have been also investigated. A new testing procedure
bas been used for the research utilizing a
modified apparatus. It has been concluded that the size of aggregate and the shear strength of soft soil are very important parameters. The use of geosynthetic layers and / or a layer of fine soil at the top of soft seabed could be essential when a high embankment with coarse material is going to be constructed.