Physical model tests on stability and interlocking of new breakwater armour block Crablock

The protection of breakwater structures is in this research considered. The design of rubble mound concrete armour layers for breakwaters can be divided in a single layer system and a double layer system. The single layer system is nowadays mostly applied because of the high interlocking, high stability of the structure, reduction of concrete...

Lean Engineering Design of Rail Interlocking Systems with RailML

An interlocking system forms a vital part of a railway signaling system because it ensures the safe movement of trains. For one by controlling movable track elements like switches and for an-other by controlling signals. The engineering design of interlocking systems poses challenges to both engineers at e.g. Siemens and the infrastructure...

The influence of core permeability on the stability of interlocking, single layer armour units

The permeability of a breakwater is of great importance for the stability of the armour layer. The influence of the structural permeability on the stability of rock armour units was already researched by Van der Meer using the 'notional' permeabiltiy. However, for single layer interlocking armour units the influence core permeability is rather...

Extraction Force Xbloc: Model Tests

This report describes the influence of the slope angle of a breakwater slope, the density of the concrete of the Xbloc armour unit, the vertical position of the Xbloc on the breakwater slope and the roughness of the under layer of the breakwater on the extraction force of an Xbloc armour unit. By testing the extraction force, indirectly the...

Effect of the concrete density on the stability of Xbloc armour units

This thesis is about the influence of the specific weight on the stability of single layer interlocking armour units on rubble mound breakwaters. The hydraulic stability of the Xbloc armour unit is expressed by the stability number which is based on the assumption of dominance of lift, drag and gravity forces. If other forces have significant...