 
          3300
        
        
          Proceedings of the 18
        
        
          th
        
        
          International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
        
        
          Protection of the object against suffusion phenomenon
        
        
          development and piping effects shall be treated as the main
        
        
          element securing safety of Włocławek Dam.
        
        
          For further observations of the loose zones and
        
        
          determination of the density change, periodic density control
        
        
          tests shall be introduced in the area of a site particularly
        
        
          exposed to high hydraulic gradients, as discussed above.
        
        
          It is necessary to ensure that control tests are done with the
        
        
          use of equipment of internationally recognized standards in
        
        
          order to obtain the required accuracy of the density change
        
        
          determination and comparable results across worldwide known
        
        
          cases.
        
        
          5
        
        
          REFERENCES
        
        
          Wolski W., Mirecki J. 2011.
        
        
          
            Technical condition of Włocławek Dam
          
        
        
          
            assessment.
          
        
        
          Warsaw.
        
        
          Design documentation for establishment of geological conditions under
        
        
          Włocławek Dam.
        
        
          Fanti K., Fiedler K., Kowalewski J., Wójcicki S. 1972.
        
        
          
            Weirs
          
        
        
          , Warsaw.
        
        
          Data Preparation & Tutorials Z_SOILPCv2010. 2010. Lausanne
        
        
          Wolski W., Lipiński M.J., Furstenberg A., Barański T. 2000
        
        
          
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