CEDA Dredging Days 2019

Dredging Days

Experimental study on rock cutting with a pickpoint

7-8 November 2019. Ahoy, Rotterdam, the Netherlands

Rutten T, Chen X and Miedema SA - Delft University of Technology, the Netherlands; Liu G and Hong G - CCCC National Engineering Research Center of Dredging Technology and Equipment, China

  • Many models to predict cutting forcesare based on assumptions that do not compare in reality. These assumptions appear to restrict the accuracy of the model when comparing the predicted forces with the actual measured cutting forces
  • We developed a method where we decomposed the measured cutting forces into an additional shear force due to sideways outbreaking and an additional force for the removal of the secondary crushed zone due to the blunt tool
  • Even though the total measured cutting force appeared to be linear, the shear force increased exponential with the depth
  • On the other hand, the secondary crushed zone converges to a constant value over depth
  • The above described outcomes open up possibilities for future research. If the existing models can be extended to include this phenomena, which occurred during cutting, a next step in accurately predicting the cutting forces can be made

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Last update: 6 September 2019