25-02-2013, 03:31 PM
Marine Structure Designs
Marine Structure.ppt (Size: 736.5 KB / Downloads: 273)
Rubble Mound Structures
A wide variety of rubble mound structures is built in the costal zone. This includes:
Revetments and seawalls (along the shore)
Groins and jetties (perpendicular to the shore)
Breakwaters (offshore and shore parallel)
Revetments
A facing of stone, concrete, etc., to protect an embankment, or shore structure, against erosion by wave action or currents.
Vertical structures are classified as either seawalls or bulkheads, according to their function, while protective materials laid on slopes are called revetments.
Bulkheads
Bulkhead - means an upright structure or partition built parallel or nearly parallel to the shoreline, primarily to retain or prevent land from sliding and secondarily, to protect upland from beach erosion and damage from wave action. A bulkhead is generally of lighter construction than a seawall.
Bulkheads may be either cantilevered or anchored (like sheetpiling) or gravity structures (such as rock-filled timber cribs)
Seawalls
Seawall - means an upright structure separating land and water areas, primarily designed to prevent erosion and other damage to upland areas due to wave action. A seawall is generally of heavier or more massive construction than a bulkhead.