Stability of slope material affected by bow thrusters at open quay structures

In the last decades shipping has increased significantly, resulting in larger ships with an increasing power in bow thrusters. Due to this increasing power, the hydraulic loads at bottom protection near quay structures has also increased, making a traditional bed protection more expensive. Therefore an alternative design method is suggested in...

Numerical modelling of bow thrusters at open quay structures

Introduction Bow thrusters are of great help for the navigation at quay walls, but the high and turbulent velocities can result in a bed load exceeding the strength of the bed or bed protection. To be able to design a stable bed the velocities at the bed need to be accurately determined. In design practise the velocities generated by a propeller...

Modelling of Scour Depth at Quay Walls due to Thrusters

Introduction Inland and seagoing vessels are equipped with (bow) thrusters. The use of these thrusters can cause scour of the bed alongside a quay wall. In order to assess the consequences of local scour due to bow thrusters on the design of the structure it is desirable to know the dimensions of the scour holes as a function of in time....

Bow Thruster Currents at Open Quay Constructions on Piles

Research into hydraulic loads by a bow thruster. The hydraulic loads on the slope at an open quay construction on piles is investigated. The propeller (bow thruster) jet induces hydraulic loads on the bed, which could result in scour holes and damage to the quay construction. Performed scale model tests provide details about the hydraulic loads...

Omgaan met onzekerheden bij het ontwerpen van bodembescherming nabij kademuren

Gedurende het ontwerpproces van bodembescherming nabij kademuren krijgt de constructeur te maken met diverse onzekerheden. Hij moet zowel rekening houden met toekomstige schaalvergroting van de scheepvaart, ontwerpformules die maar in beperkte mate aan de praktijk zijn getoetst en veiligheidseisen die aan een de kademuur worden gesteld....