Riprap

Look up riprap in Wiktionary, the free dictionary.

Riprap lining a lake shore

Concrete rubble used as riprap along the San Francisco Bay shoreline

Riprap stairway

Crews replacing riprap at Galveston Seawall after a 1915 hurricane

Riprap, as rip rap, rip-rap, shot rock, rock armour or rubble, is rock or other material used to armor shorelines, streambeds, bridge abutments, pilings and other shoreline structures against scour and water or ice erosion. It is made from a variety of rock types, commonly granite or limestone, and occasionally concrete rubble from building and paving demolition. It can be used on any waterway or water containment where there is potential for water erosion.

Underwater, rock armour caps submerged tunnels to protect against accidental anchor strikes or sinking debris.

References

Ciria-CUR (2007) - Rock Manual - The use of rock in hydraulic engineering.
N.W.H. Allsop (2002) - Breakwaters, coastal structures and coastlines.
US Dept. of Transportation (2004) - Trail Construction and Maintenance Notebook

External links

Coastal management
Management	Coastal management Accretion Integrated coastal zone management Managed retreat Submersion
Hard engineering	A-jack Accropode Akmon Artificial reef Breachway Breakwater Cliff stabilization Dolos Flood wall Floodgate Gabion Groyne Levee Hard engineering Honeycomb sea wall Hudson's equation KOLOS Revetment Riprap Seawall Tetrapod Training wall Xbloc
Soft engineering	Beach nourishment Beach drainage Living shorelines Sand dune stabilization Soft engineering Soft shore remediation
Related topics	Beach evolution Coastal erosion Land reclamation Longshore transport Modern recession of beaches

Geotechnical engineering

on-site	Cone penetration test Standard penetration test Monitoring well piezometer Borehole Crosshole sonic logging Nuclear densometer test Static load testing
laboratory	Atterberg limits California bearing ratio Direct shear test Hydrometer Proctor compaction test R-value Sieve analysis Triaxial shear test Hydraulic conductivity tests Water content tests

Soil

Clay Silt Sand Gravel Peat Loam Loess
properties	Soil classification Hydraulic conductivity Water content Void ratio Bulk density Thixotropy Reynolds' dilatancy Angle of repose Cohesion Porosity Permeability Specific storage
mechanics	Effective stress Pore water pressure Shear strength Overburden pressure Consolidation Compaction Shear wave Lateral earth pressure

Stability

Plaxis
GEO5
SEEP2D
STABL
SVFlux
SVSlope
UTEXAS

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