Breakwaters

There are 3 common types of breakwaters being:
1) Tetrapod
2) Tribar
3) Dolos

There are other variations but these are the most common.

The 3 common breakwaters being Tetrapod, Tribar and Dolos.

They are made of concrete and precast in steel moulds.

Breakwaters.

The breakwater for the Palm Islands in the United Arab Emirates were not of the precast concrete type but blasted quarry rocks. This is less expensive and faster to make. It is also easier to place the rocks by using excavators. If Dolosse had been used, there may be a problem with placing them quickly.

The original post for the Palm Island construction can be found here.

Palm Jumeirah showing the 2 discontinuities in the breakwater to prevent water stagnation.

One of the 2 bridges which was constructed over the discontinuity in the breakwater.

The photo above shows the bridge over the discontinuity in the breakwater. There are 2 of these discontinuities for Palm Jumeirah. The purpose is to allow the seawater to flow around the prime real estate. Stagnant water can be a problem. As construction was required to commence quickly, there was no time for hydraulic model testing and it was not discovered that the water would be stagnant until the breakwater had been constructed.