Both geocells and geogrids are new types of geotechnical materials used in roadbeds, slope protection, and other engineering projects. Both geocells and geogrids have high compressive strength, strong bearing capacity, small deformation, corrosion resistance, and friction. It has the characteristics of large resistance, long life, time-saving and labor-saving engineering construction, short cycle time, and low cost.
The essential difference between geocell and geogrid
Geocell is a three-dimensional mesh structure cell structure produced by reinforced HDPE sheet raw material and welded by high-strength electric welding. Geogrid is a two-dimensional grid pattern or a three-dimensional grid screen grid with a certain aspect ratio, which is made of polypropylene, polyethylene, and other macromolecular materials through thermoplastic or compression molding. Geocells and geogrids are all made of light polymer materials, with high strength, strong bearing capacity, small deformation, small creep, corrosion resistance, large friction coefficient, long life, convenient construction, rapid construction, etc. It is used in a series of soft foundation treatments, foundation reinforcement, retaining walls, and ground anti-cracking fiber engineering projects such as pavement infrastructure construction.
The comprehensive difference between geocell and geogrid
1. The geocell is a three-dimensional reinforcement, and the geogrid is a plane reinforcement; the geocell is a three-dimensional grid cell structure, and the geogrid is a two-dimensional grid or a three-dimensional grid screen with a certain height. structure.
2. The geocell is a three-dimensional mesh structure, and the geogrid is a two-dimensional grid or a three-dimensional grid with a certain aspect ratio.
3. The side confinement and bending stiffness of the geocell are better than those of the geogrid; the bearing capacity and distributed load effect of the geocell are better than those of the geogrid;
4. Omit economic development costs, geocells and geogrids are all high quality and inexpensive, and geocells are higher than geogrids.
The difference between geogrid and geocell is reflected in the use
1. The purpose of the geogrid is the road reinforcement of the plane, and the purpose of the geocell is the three-dimensional reinforcement of the slope, and the two have different working principles.
2. The geogrid is subjected to a two-way force to generate tensile strength, known as tensile strength, while the geogrid is a three-dimensional shape, which can generate a large binding force in the vertical direction. This binding force is to limit The soil undergoing lateral and lateral expansion displacement, which is used to fix the vegetation root system on the slope, so that it can take root and grow in the stable soil layer, thereby greening the slope environment and maintaining water and soil.
3. The geogrid is a square mesh structure, and the honeycomb-shaped three-dimensional structure of the geogrid has a big difference in mesh size. Geogrid meshes are 2 cm, 4 cm, 6 cm, and 12 cm. cm, the mesh size of the geocell is very large, which can be customized according to the construction requirements, and there are dozens of common ones.
1. The geocell can be large or small and can be retracted for transportation. It can be prestressed and stretched into a mesh structure during construction, filled with loose raw materials such as soil, gravel, concrete, etc., to form a strong lateral limit and large bending stiffness.
2. The geocell material is light, wear-resistant, stable in organic chemical properties, resistant to light and oxygen embrittlement, corrosion-resistant, and suitable for soil conditions such as different soil layers and deserts.
3. The high side limit of the geocell and the ground anti-skid, prevent deformation and improve the bearing capacity and decentralized load effect of the roadbed project.
4. Changing the geometry specifications such as the geocell aspect ratio and welding distance can meet the requirements of different engineering projects.
5. The geocell can be large or small, and the transport size is small; the connection is convenient and the construction speed is faster.
1. The geogrid has high strength, small creep, adapts to various environmental soils, and can meet the use of tall retaining walls in high-grade highways.
2. Geogrid can improve the interlocking and occlusion of the reinforced bearing surface, enhance the bearing capacity of the foundation, restrain the lateral displacement of the soil, and enhance the stability of the foundation.
3. Geogrid has the characteristics of high strength, strong bearing capacity, corrosion resistance, anti-aging, large friction coefficient, uniform holes, convenient construction, and long service life.
4. Geogrid is more suitable for deep-sea operation and bank reinforcement, which solves the technical problems of low strength, poor corrosion resistance, and short service life caused by long-term erosion of seawater for gabions made of other materials.
5. The geogrid can avoid the construction damage caused by being rolled and damaged by the machine during the construction process.
The main purpose of the geocell
1. Geocells are used to secure road and railway line foundation projects.
2. Geocells are used for river embankments and shallow water river treatment projects to bear the load capacity.
3. Geocell is a mixed teaching retaining wall used to avoid landslides and load forces.
4. When encountering a soft subgrade, the selection of geocell can reduce the labor efficiency of engineering construction, reduce the thickness of subgrade engineering, and the construction speed of the project is faster and has good characteristics, which reduces the project budget.
The main purpose of geogrid
Geogrid is suitable for various embankments and roadbed reinforcement, slope protection, and tunnel wall reinforcement. Large-scale airports, parking lots, dock freight yards, and other permanent bearing foundation reinforcement.
1. Geogrid is used to increase the bearing capacity of the road (ground) foundation and prolong the service life of the road (ground) foundation.
2. Geogrid is used to prevent the road (ground) from collapsing or cracking and keep the ground beautiful and tidy.
3. Geogrid is used for conventional construction, saving time and effort, shortening the construction period, and reducing maintenance costs.
4. Geogrid is used to prevent cracks in culverts.
5. Geogrid is used to enhance soil slope and prevent soil erosion.
6. Geogrid is used to reduce the thickness of the cushion and save costs.
7. The geogrid is used to support the stable greening environment of the grass-planting mesh pad on the slope.
8. Geogrid can block the transmission of seismic force and play an important role in enhancing the seismic stiffness, strength, and stability of the embankment.
Difference between geocell performance and geogrid performance
Resistance and dimensional stability
|resistance to deformation||High elastic behavior (resistance) to high deformation||Small resistance to small deformations|
|Durability under cyclic dynamic loads||Vertical loads transfer to the geocell wall hoop stress and radial loads, at high dimensional stability and structural integrity||high level of deformation|
|resistance zone||Resistance manifests itself as a three-dimensional “plane”||Shows less limited resistance on one or two sides of the plane|
|resistance to bending moment||The layer depth provides an effective moment-increasing resistance at least the height of the cell. In addition, cell structure resistance and complete solutions provide better performance at the concentration or loading “point”||Little to no resistance, geogrid requires at least two layers to create a composite with little bending moment resistance|
|vertical soil interface friction||Taller matte or perforated cell walls provide a large interface area||small height area of influence|
|Lateral deformation||Lateral stresses are constrained by stiff cell sheets, while additional resistance is passively provided between adjacent cells, resulting in a high-capacity stiff beam||The obvious limitation of lateral expansion is to be limited to a very small section (unless the geogrid can be “wound”)|
|Pressure and Settlement||The geocell acts as a three-dimensional or semi-rigid beam-slab unit to disperse the surface load, the pressure transfer to the subgrade is reduced by up to 50%, and the pressure is more evenly distributed across the beam-slab, and the overall and uneven settlement is greatly reduced.||Geogrids only want to win within a small radius of efficient loading. The load is distributed over a small area. Therefore, there is an increased potential for overall and uneven settlement as the pressure increases.|
Fill soil type, soil retention, drainage
|Soil enhancement/retention||Accepts a wide variety of soils, even inferior or poorly graded granular materials||Aggregate filling of specific quality (high cost) required|
|Reservation soil improvement||Improve the apparent cohesion of the soil and significantly improve its resistance to the application of load.||Improvements for a limited vertical area|
|Abrasive soil properties||3D restraint reduces total and local wear||Abrasion reduction can only be achieved with specific particles and graded soils.|
|Drainage performance||Retains soil particles from damage, liquid flows naturally in any direction and prevents leaching of soil particles from those streams.||Soil particles that remain only in thin planes, the liquid flows, and soil particles are easily leached in other directions.|
The successful application of geogrids and geocells is expected to reduce various embankment diseases common in high-intensity earthquake areas and improve the earthquake resistance and disaster reduction capabilities of roads. With a further understanding of the characteristics of geocells and geogrids, it has been found that it has irreplaceable advantages over other geotextiles (geotextiles, geomembranes, geogrids, mold bags, geonets, etc.) It has unique application prospects in many fields.