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Rip-rap is commonly used as erosion protection for culverts, stream banks, beachfronts, drainage channels, slopes and other areas subject to erosion by water. However, rip-rap alone is often not enough to prevent erosion. Scouring and migration of soil particles through the rip-rap can undermine its effectiveness. A well-chosen erosion control geotextile will greatly improve the performance and lifespan of rip-rap.
The engineer has several options when selecting the type of erosion control geotextile to place under rip-rap. Multiple factors must be taken into consideration. The soil type and its percentage of fines plays a very important role in choosing the correct geotextile. The weight and angularity of the rip-rap and the height at which it is dropped will determine the required geotextile strength. Finally, anticipated water flow must be calculated.
Nonwovens are cost-effective and perform very well with clays, coarse sands and aggregates. For fine-grained sands a woven monofilament is the correct option. Fine grained sands will cause nonwovens and slit-film wovens to clog. Woven monofilaments allow the finest sand particles to pass directly through them without getting clogged. Consult with us for more information.
Non-woven geotextiles are chosen when both soil separation and permeability are required. These products are often used to wrap French drains or in conjunction with other sub-surface drainage solutions. Non-wovens are also typically used beneath rock riprap revetment, where both separation and drainage are critical.
Geotextile is a fabric used in landscaping, drainage and engineering. These synthetic fabrics are also permeable, meaning gases and fluids can pass through them. ... The fabric is placed on the ground, between plants/crops, forming a barrier that allows air and water to pass through the fabric in order for plants to grow.
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