What are the points of attention in geogrid construction?

Construction site: Compaction, leveling, and removal of spiked projections are required.

Grid laying: In the leveling and compaction field, the main force direction (vertical) of the installed paving grid should be perpendicular to the direction of the embankment axis, and the paving should be smooth, non-folding and as tight as possible. With nails and earth and stone pressure fixed, the laying of the grid is the main direction of force is the best length of the joints, the connection between the web and the width of the bandage can be manually tied, lap width of not less than 10cm. If the grid is set more than two layers, the layers should be staggered between the layers. After large areas are laid, the overall straightness should be adjusted. After filling a layer of soil, before the rolling, the grid should be tensioned again by hand or machine, and the force should be uniform, so that the grid is in a straight and stress state in the soil.

Filler selection: Fillers should be selected according to design requirements. It has been proved that fillers can be used in addition to frozen soil, swamp soil, household garbage, chalk soil and diatomaceous earth. However, the mechanical properties of the gravel soil and the sand soil are stable and are affected by the water content. The particle size of the filler must not exceed 15 cm, and attention should be paid to controlling the gradation of the filler to ensure compaction weight.

Padding and compaction of the filler: When the grid is laid and positioned, it should be timely filled and covered. The exposed time must not exceed 48 hours. It can also adopt the flowing operation method of backfilling. Paving at the two ends first, fixing the grille and pushing it towards the middle. The order of rolling is first on both sides and then on the middle. When compacting, the pressure roller cannot directly contact with the sliver material, and the non-compacted screed generally does not allow the vehicle to travel on it so as to avoid dislocation of the sturdy material. Layered compaction is 20-30cm. The degree of compaction must meet the design requirements, which is the key to the success or failure of reinforced earth engineering.