Geocell Channel Protection/ Geocell Shoreline Protection
Problem
Channels are oftentimes subject to debilitating erosion due to the water contained by the channel walls. Depending on the velocity of the water flow and the frequency and degree of stormwater runoff, severe hydraulic stresses upon the channel can pose significant dangers to the system.
Multiple considerations are necessary to achieve a safe, environmental, and durable channel system:
– Not only must the system be resistant to erosion, but stable under the slope geometry and hydrostatic uplift forces.
– The channel walls must also be somewhat flexible in order to ensure integrity in the face of localized deformations from seasonal factors and sub-base void formation. However, the system must also be sturdy and durable enough to avoid degradation and uplift from the hydraulic forces present.
– System permeability is desirable in some situations to allow natural drainage. A previous channel lining can relieve hydro-static uplift forces, thus stabilizing the system.
Standard soil and grass linings face the danger of erosion from extended water flow. When channels are lined with loose aggregate, even low to moderate forces can gradually remove particles. Poured concrete walls can only perform effectively with construction joints to avoid rigidity and to lessen the dangers of compromise from base material displacement.
Solution
Geocell grid can be laid directly on the slope and properly anchored. Based on the velocity of the flow and duration, the geocell can be filled with angular rock (up to 10 fps, 3 m/s), vegetated soil (up to 20 fps, 6 m/s), or concrete (20 fps, 7 m/s and higher). A single panel can be filled with different types of material so that it can withstand hydraulic energy as well as provide an aesthetic look.
How does Geocell work on channel protection projects?
The Geocell channel protection system provides a wide variety of flexible protection treatments for open channels and hydraulic structures. The system provides stability and protection of channels exposed to erosive conditions ranging from low-to-high flows either intermittent or continuous.
Geocells can be used to protect channels from challenging erosion conditions or continuous flow. It confines the infill within the cellular structure and assures effective subgrade drainage and subsoil protection. It provides a stronger and more lasting strengthening and stabilizing effect for the load-bearing capacity or anti-erosion layer of the river bank. The system also enhances the performance of vegetation by reinforcing root zones and directing flows over the top cells, making them compatible with the local environment and ecology.
1, Greatly improves the hydraulic performance of conventional protection materials such as aggregate, rip-rap and vegetation by confining them within the cellular structure.
2, Can be designed for specific site conditions based upon compatibility with local environmental, ecological and aesthetic requirements, maximum anticipated flow, and associated hydraulic stresses.
3, Surface roughness and hydraulic efficiency of the lining system can be changed to control flow.
4, Green wall with vegetation on the outer rows for an aesthetic retention solution.
Where to use?
Typical Applications:
Drainage ditches
Stormwater diversion
Stormwater containment
Spillways
Culvert outfalls
Drainage channels
