Geogrid construction points

1. Construction site: It is required to be compacted and leveled, and the spiked protrusions are removed.

2. Grid laying: On the flat and compacted site, the main force direction (longitudinal direction) of the installed grid should be perpendicular to the axis of the embankment. The laying should be smooth, without wrinkles, and tension as much as possible. It is fixed by inserting nails and earth-rock pressure. The main direction of the laying of the grille is preferably long and no joint. The connection between the web and the web can be manually tied and lapped, and the overlap width is not less than 10cm. If the grid is set to be more than two layers, the layers should be staggered. After laying a large area, the overall straightness should be adjusted. After filling a layer of soil, before the crushing, the grille should be tensioned again with manual or machine tools, and the force should be even, so that the grille is in a straight state under the soil.

3, the choice of filler: filler should be selected according to design requirements. Practice has proved that in addition to frozen soil, marsh soil, domestic garbage, chalk soil, diatomaceous earth can be used as filler. However, the mechanical properties of gravel soil and sand soil are stable and have little influence on water content, which should be preferred. The particle size of the filler should not exceed 15cm, and the filler gradation should be controlled to ensure the compaction weight.

4. Paving and compaction of the packing: When the grid is laid and positioned, it should be filled in time, and the bare time should not exceed 48 hours. It can also be used as a running method for backfilling while laying. First spread the packing at both ends, fix the grille, and then push it toward the center. The order of rolling is first and then the middle and the back. When rolling, the pressure roller can't directly contact the ribs. The uncompacted reinforced body generally does not allow the vehicle to drive on it, so as to avoid misalignment of the ribs. The partial lamination is 20-30 cm. The degree of compaction must meet the design requirements, which is also the key to the success of reinforced soil engineering.

5, anti-drainage measures: in the reinforced soil project, must be done inside and outside the wall drainage treatment; to do a good foot protection, anti-scouring; in the soil to set up filtration, drainage measures, if necessary, should be set geotextile , water pipe (or blind ditch). Drainage by means of dredging, can not be blocked, otherwise it will cause hidden dangers.