Hillblock protects dikes against flooding
This slope-lining concrete block produces significantly greater wave abatement and provides more stability with 30% less concrete than existing bank and shore protection.
Renowned and independent research shows that Hillblock has a much lower wave run-up. The default values for this are around 0.7 (30% wave reduction).
By altering dike design and construction this can be lowered even further to 0.5 (50% wave reduction). This is comparable with wave run-up reduction values that can be achieved using a double layer of stone rubble.
The voids absorb the water like a sponge. Pressure of the down coming wave is reduced in strength by the voids between the blocks and under the heads. Which also makes the revetment more stable.
- The gaps between the heads act as regulator and reduce wave impact. The greater the openings, the greater the pressure in the channels, which in turn further reduces the wave run-up.
- The corridors between blocks provide an enlarged flow area more than three times greater than the upper layer. The increased flow area helps reduce the wave run-up by increasing friction.
- Additional wave reduction is caused by the pressure needed to squeeze the water through the channels, and also causes turbulence
In addition to energy reduction of waves, our lobby is to use the above principle for water retention. The cavities and channels inside the stone structure are ideal for the rapid intake of water, where subsequently the water can be slowly drained off to the sewer or nature.
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