There are significant differences between unidirectional geogrid and bidirectional geogrid in many aspects

There are significant differences between unidirectional geogrid and bidirectional geogrid in many aspects. The following is a detailed popular science introduction:

1Force direction and load-bearing capacity:

Unidirectional geogrid: Its main feature is that its resistance can only bear loads in a single direction, that is, it is mainly suitable for bearing soil forces in the horizontal direction, which has a significant effect on the slope stability of soil slopes. Such grilles typically combine anchor rods and anchor soil to enhance their load-carrying capacity and stability.

 Biaxial geogrid: It shows a more comprehensive load-bearing capacity and can withstand both horizontal and vertical loads. Its two-way load-bearing characteristics make it widely used in the field of soil strengthening and reinforcement, especially suitable for large buildings, earthworks and infrastructure projects.

2 Structure and Performance:

Unidirectional geogrid: made of high molecular polymer (such as PP Or HDPE） As the main raw material, it is made by uniaxial stretching process. In this process, the polymer chain molecules are reoriented and arranged to form a long elliptical network structure with high strength and high node strength, and the tensile strength can reach 100-200 Mpa， Close to mild steel levels.

 Biaxial geogrid: On the basis of uniaxial stretching, it is further stretched in the vertical direction, so as to have extremely high tensile strength in both longitudinal and transverse directions. This structure can provide a more effective force bearing and diffusion system in the soil, and significantly improve the bearing capacity of the foundation.

3 Application fields:

 Unidirectional geogrid: Because of its excellent tensile strength and convenience of construction, it is widely used in reinforcing soft foundations, reinforcing cement or asphalt pavements, reinforcing embankment slopes and retaining walls and other fields. In addition, it has also performed well in handling landfills and preventing soil erosion.

 Bidirectional geogrid: Because of its bidirectional load-bearing characteristics and high strength, it is more suitable for large and complex engineering environments, such as roadbed and pavement reinforcement of highways, railways, and airports, foundation reinforcement of large parking lots and dock freight yards, and Slope protection and mine tunnel reinforcement, etc.

To sum up, there are significant differences between unidirectional geogrid and bidirectional geogrid in terms of stress direction, load-bearing capacity, structural performance and application fields. The selection needs to be considered according to specific engineering needs.