Geocell is a threedimensional honeycomb grid structure made of polymer materials such as highstrength polyethylene (HDPE) or polypropylene (PP), which is strongly welded or riveted. After unfolding, it forms a threedimensional grid cell, which can be filled with materials such as soil, sand, gravel and concrete. In the river bank and river canal project, geocells are mainly used for slope protection and bottom protection to prevent soil erosion, protect the stability of river banks and improve the water ecological environment.

Advantages

1. Prevent soil erosion: Effectively restrain the soil body, prevent scouring by water flow, and reduce the erosion of riverbanks and canals.

2. Improve stability: Enhance the overall stability of riverbanks and canals to prevent landslides, subsidence and other disasters.

3. Strong adaptability: According to different hydrological conditions and topography and geomorphology, the appropriate size of the chamber and filler can be selected to adapt to a variety of complex environments.

4. Ecofriendly: It can be filled with local soil or planted with vegetation to realize ecological slope protection and improve the water ecological environment.

5. Simple and fast construction: light weight, easy to transport and install, can greatly shorten the construction period, reduce project costs.

6. Good durability: using high quality polymer materials, with excellent antiaging, corrosion resistance, long service life.

7. Good economy: Compared with the traditional concrete slope, the cost is lower and the maintenance cost is less.

Specification

(A) Sheet thickness:
Common geocell sheet thickness of 1mm2mm, thinner sheet for water velocity is small, weak scouring force of the river channel; thicker sheet is used for rapid water flow, high protection requirements of the river bank project.

(B) Chamber height:
The height of the chamber is generally between 50mm 300mm. The smaller height of the chamber can be used for shallow protection and slope stabilization of small rivers and canals; the larger height of the chamber is suitable for deep protection, large river bank management and the need to fill more materials.

(C) Welding spacing:
Welding spacing is usually 330 1000mm, smaller welding spacing can make the geocell structure more compact, enhance the overall stability, suitable for high lateral constraint requirements of the region; larger welding spacing can reduce the cost, used for relatively low strength requirements of the part.

(D) Unfolding size:
The unfolded length of the geocell can be customized according to engineering requirements. Suitable unfolding size can be better adapted to the width and length of different canals and improve the construction efficiency.

Scenarios of use    

1. River bank slope protection: used to protect the river bank, prevent water scouring, reduce soil erosion.

2. River channel bottom protection: used to protect the bottom of the river channel, prevent scouring, improve the stability of the river channel.

3. Ecological slope protection: combined with vegetation planting to realize ecological slope protection and improve the water ecological environment.

4. Reinforcement of dykes: Used to reinforce dykes and improve the flood resistance of dykes.

5. Reservoir slope protection: Used to protect reservoir slopes, prevent landslides and ensure reservoir safety.

6. Artificial wetland construction, ecological restoration: used to construct artificial wetland, purify water quality, improve the ecological environment.

River channel application mechanism

The application mechanism of geocells in riverbank canal project is mainly reflected in the following aspects:

1. constraining effect: geocell produces lateral constraints on the fill, restricts the shear deformation of the soil, and improves the shear strength of the soil.

2. dispersion of water impact: geogrid can disperse the impact of water flow, reduce the direct scouring of riverbanks and canals. 3. improve scour resistance: geogrid can disperse the impact of water flow, reduce the direct scouring of riverbanks and canals.

3. Improvement of scour resistance: Geocell and filler work together to form a whole protective layer, which improves the scour resistance of riverbanks and canals.

4. Promote the growth of vegetation: Geocell can provide a good growing environment for vegetation, promote the growth of vegetation, and further improve the effect of slope protection.

5. Improve the water ecological environment: the vegetation can absorb pollutants in the water, improve water quality, provide habitat for aquatic organisms and improve the water ecological environment.

Construction program

The construction of geocells in riparian canal projects generally includes the following steps:

1. site cleaning: clean up the construction site, remove debris, level the site.

2. Slope trimming: trim the slope of river bank or river channel to meet the design requirements. .

3. geotextile laying (optional): lay a layer of geotextile on the slope surface for isolation and drainage..

4. Geocell Laying: Spreading out the geocells and connecting the adjacent cells to form a continuous protective layer.

5. Anchoring: Use anchors or Unails to secure the geocells to the slope surface to prevent sliding.

6. Filling: Fill the selected filling material into the cell in layers, the thickness of each layer should not exceed 30cm, and compaction.

7. Vegetation planting (optional): Plant vegetation on the surface of the fill to realize ecological slope protection. 

8. Drainage facilities: Set up necessary drainage facilities to eliminate water on the slope.

Construction Precautions

The laying direction of geocell should be parallel or perpendicular to the water flow direction.

The filling material should be gravel soil or gravel soil with good grading and no debris.

Avoid damaging the geocell during filling.

During compaction, the degree of compaction and water content should be controlled to ensure that the fill is dense.

The anchoring should be firm and reliable to prevent the soil from being damaged.

The anchoring should be firm and reliable to prevent the geocell from sliding.

Vegetation planting should be selected to adapt to local climate and soil conditions.

Drainage facilities should be unobstructed and regularly inspected and maintained.