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PET Geogrid Installation Guideline

PET Geogrid Installation Guideline

Mining Geogrid
  1. PET Geogrid Construction site: It is required to be compacted and leveled, and the sharp protrusions should be removed.
  2. Grid laying: On a flat and compacted site, the main force direction (longitudinal) of the grid installed and laid should be perpendicular to the axis of the embankment, and the laying should be flat, without wrinkles, and as tight as possible. Fix it with nails and earth-rock weight. The main force direction of the laid grid is preferably full-length without joints. The connection between the webs can be manually tied and lapped, and the lap width is not less than 10cm. If there are more than two layers of grilles, the layers should be staggered. After laying a large area, the flatness should be adjusted as a whole. After filling a layer of soil and before rolling, the grid should be tensioned again manually or with machines, and the force should be uniform so that the grid is in a state of tension and stress in the soil.
  3. Filling selection: Filling should be selected according to design requirements. The practice has proved that it can be used as filler except for frozen soil, swamp soil, household garbage, chalk, and diatomaceous earth. However, gravel soil and sandy soil have stable mechanical properties and are less affected by water content, so they should be preferred. The particle size of the filler shall not be greater than 15cm, and attention shall be paid to controlling the gradation of the filler to ensure the compacted weight.
  4. Paving and compacting of filler: After the grid is laid in place, it should be covered with soil in time, and the exposure time should not exceed 48 hours. The flow method of backfilling while laying can also be adopted. Spread the filler at both ends first, fix the grid, and then push it to the middle. The order of rolling is first on both sides and then in the middle. During rolling, the pressure wheel cannot directly contact the reinforcement, and the uncompacted reinforcement generally does not allow vehicles to drive on it, so as to avoid the dislocation of the reinforcement. Layer compaction is 20-30cm. The degree of compaction must meet the design requirements, which is also the key to the success of reinforced soil engineering.

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