It gives a platform for handling cargo.The advantages of such a construction are: Such a construction is founded on the low water level. Mound with Superstructure at Low WaterĪ solid superstructure that consists of a Quay protected by a parapet on the sea face is constructed on top of the rubble mound. Also, the size of concrete blocks could be controlled to suit the exposure condition. Concrete blocks have the advantage that they can be heaped at a steeper slope than rubble, economizing in space and material. If rubble is difficult to find, concrete blocks are used to form the mound. This arrangement is coherent, exposing the bigger sizes to the action of the waves, while the smaller sizes forming the core are protected. The sizes are increased gradually outwards. Rubble mounds are formed using the rubble of different weights, placed according to sizes-the smaller and lighter materials constituting the core. Accordingly, all protective methods are adopted above the low water level. The most disturbing action of the waves is in between the high and low water levels. Such flattening has to be protected as far as possible. The waves gradually drag down the mound on exposed sites, giving it a flat slope on the sea face.
The quantity of rubble depends upon the depth and height of tides or waves.
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