Is the geogrid paved vertically or horizontally

1. The laying direction of one-way geogrid
‌Horizontal laying as the main
Unidirectional geogrids are usually laid horizontally (perpendicular to the embankment axis) because their main function is to enhance the soil's shear resistance and load-bearing capacity. Cross-laying can more effectively resist horizontal mechanical stresses and prevent landslides and collapses.
Reason: The main mechanical directions of the soil are mostly horizontal, and horizontal laying can maximize the reinforcement effect of the grid.
‌Exception: If there are special oscillations or impact loads in the project (such as earthquake areas), longitudinal laying may be required, but the soil conditions and design requirements must be combined.
‌Construction Points‌
Before laying, the base layer should be leveled and white lines should be drawn or hung to prevent skew.
After fixing the end, tighten the grille, manually straighten it every 10 meters, with a overlap width of 10-15cm and fixed with iron nails.
Use a 6T-10T roller during rolling to avoid excessive stretching and tearing.
2. The laying direction of two-way geogrid
Due to the balance of vertical and horizontal strength of the two-way geogrid, the laying direction must be determined according to the engineering structure:
‌Road Engineering‌: Usually laid longitudinally (along the line direction), perpendicular to the middle line of the roadbed to evenly disperse the load.
‌Special scenarios‌: For example, steel-plastic geogrids must be fixed with tied wires or U-shaped nails according to the design drawing requirements.
3. General construction specifications
Direction selection principle
Priority is given to reference design drawings, and comprehensive judgment is made based on soil mechanical direction and engineering load type (such as horizontal shear force or vertical pressure).
Avoid twisting, overlapping or excessive stretching to ensure uniform stress on the grille.
‌Environment and Aging Control‌
Avoid long-term exposure of sunlight and cover the filler within 48 hours after laying.
Construction is prohibited on rainy days or when the road surface is wet to prevent the glue from dissolution.
‌Summary‌: One-way grille is mainly horizontal, and two-way grille needs to be laid according to the design. During construction, strict compliance with specifications such as tensioning, fixing, and overlapping should be strictly followed to ensure the effectiveness of the project.