hdpe geocells gravel grid

Geocells are mainly made of HDPE (high-density polyethylene) or PP (polypropylene) sheets, which are strongly welded or riveted to form a mesh cell structure. It is flexible and can be retracted and stacked when transported, and opened and filled with earth or concrete when used, forming a structure with strong lateral constraints and high stiffness. It can be used as a cushion to deal with weak foundations to increase the bearing capacity of the foundation, and can also be laid on the slope to form a slope protection structure, and can also be used to build a retaining structure.

Geocell Dimensions :

The dimensions of the geocell mainly include the height and aperture size of the cell. The common cell height is 5 cm, 7.5 cm, 10 cm, 15 cm, 20 cm, 30 cm, etc., and the commonly used welding torch is 330mm, 400mm, 500mm, 600mm, 660mm, 712mm, 800mm, 900mm, 1000mm, etc., and these specifications are in accordance with the GB/T 19274-2003 national standard. The hole size is calculated by dividing the torch by 2, for example, a 400mm torch corresponds to a hole size of 200mm. In addition, the thickness of the geocell is generally 1 mm, and the error does not exceed 0.05 mm.

Main uses:

1. It is used to stabilize the roadbed of highways and railways.
2. It is used for the treatment of embankments and shallow rivers bearing heavy load.
3. It is used to prevent landslides and mixed retaining walls under load.
4. When encountering a soft foundation, the use of geocell can greatly reduce the construction labor intensity, reduce the thickness of the roadbed, the construction speed is fast, the performance is good, and the project cost is greatly reduced.

characteristic

1. It has free telescopic and retractable transportation, and can be stretched into a network during construction, filled with loose materials such as soil, gravel, concrete, etc., to form a structure with strong lateral restriction and large stiffness.
2. The material is light, wear-resistant, chemically stable, photo-oxidative aging, acid and alkali resistant, and suitable for different soil and desert conditions.
3. Higher lateral restriction and anti-skid, anti-deformation, effectively enhance the bearing capacity and dispersed load of the roadbed.
4. Change the geometric dimensions such as geocell height and welding distance to meet different engineering needs.
5. It can be expanded and contracted freely, and the transportation volume is small; Easy connection and fast construction.

Basic principle

The reason why geocells are effective and attract the attention of the engineering community should also start from its basic principles. In the foreign literature, when describing its principle, it is called "a honeycomb three-dimensional confinement system, which can significantly improve the performance of ordinary filler materials in load-bearing and insect infestation control applications in a large range." "The key principle is three-dimensional confinement.

Engineering applications

1. Deal with half-filled and half-dug roadbed
When building the embankment on the slope with a natural slope steeper than 1:5 on the ground, the embankment base should dig steps, and the width of the steps shall not be less than 1M, when the highway is widened in stages, the junction of the new and old subgrade fill slopes should be excavated, and the width of the high-grade highway steps is generally 2M, and the geocell is laid on the horizontal surface of each layer of steps, and the façade side limit reinforcement effect of the geocell itself is used to better solve the problem of uneven settlement.

2. Roadbed in wind-blown sand area
The roadbed in the wind-sand area should be dominated by low embankment, and the filling height is generally not less than 0.3M. Due to the low roadbed and heavy bearing professional requirements of the roadbed construction in the wind-sand area, the use of geocell can play a limiting role in the loose filler, and the roadbed has high stiffness and strength in a limited height to withstand the load stress of large vehicles.

3. The subgrade of the platform is filled with soil and reinforced
The use of geocell can better realize the purpose of platform back reinforcement, and sufficient friction can be generated between the geocell and the filler, which can effectively reduce the uneven settlement between the roadbed and the structure, and finally effectively alleviate the early impact damage of the bridge deck caused by the disease of "abutment jumping".

4. Subgrade in permafrost area
The minimum fill height should be reached when the fill subgrade is built in the permafrost area to prevent the occurrence of slurry turning or causing the upper limit of the frozen layer to drop, resulting in excessive settlement of the embankment. The unique façade reinforcement effect of the geocell and the overall limitation of effective implementation can ensure the minimum fill height in some special sections to the greatest extent and make the fill have high-quality strength and stiffness.

5. Loess collapsible roadbed treatment
When the highway and the first-class highway pass through the collapsible loess and the loess section with good compressibility, or when the allowable bearing capacity of the foundation of the high embankment is lower than the pressure of the vehicle co-load and the self-weight of the embankment, the subgrade should also be treated according to the bearing capacity requirements, and the superiority of the geocell is undoubtedly manifested.

6. Saline soil, expansive soil
The use of saline soil, expansive soil to build the highway, a highway, shoulder and slope are reinforced measures, the façade reinforcement effect of the lattice is the most excellent of all the reinforcement materials, and it has excellent corrosion resistance, can fully meet the requirements of building high highways in saline soil and expansive soil.

Product parameters