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Specification for construction of geotechnical grille

The laying direction of geo grid is always perpendicular to the center line of subgrade.
1 laying the preparation work:
1.1 foundation treatment: first the lower for leveling, compaction, the required level of not more than 15 mm, the compaction degree reach design requirements, surface strictly gravel, stones and other hard prominence.
1.2 laying environment: outdoor air temperature above 5 degrees Celsius, wind 4, no rain, snow. (except for the environment or special requirements)
2 laying and overlapping method:
2.1 in the smooth bearing layer according to design width of laying geotechnical grille, paving should be straight, smooth, close to the lower bearing layer, may not appear distorted, folds, overlapping, overlapping with staples or connectors are fixed.
2.2 the geogrid in laying, the reinforcement material high strength main direction perpendicular to the axial direction of embankment, each piece of the stack length (longitudinal) is not less than 15 cm and are connected with staples or pieces fixed distance 1.0m, transverse lap length 30 ~ 90cm, and the lap position staples or nylon rope fixed.
3 quality inspection after laying lap lap:
3.1 after the completion of the laying of the geotechnical grille, first of all, the quality requirements of the table below:
Project construction quality requirements inspection methods and frequency
1 under the level of the formation of the 4 15mm check every 200m
2 longitudinal lap width 15cm spot check 2%
3 overlapping width is greater than or equal to 30m 2%
The 4 lap seam stagger distance is greater than or equal to 50 cm 2%
4 backfill:
4.1 geogrid material paving in place should be timely filling packing, in order to avoid the by direct exposure to sunlight for too long a time, under normal circumstances, time interval not more than 48h.
4.2 packing requirements: at a distance of geogrid layer less than 8 cm of embankment fill embankment material the maximum data size shall not be more than 6 cm, geogrid first layer filling stalls shop should be by bulldozer light or front end loader, the embankment along the direction of the axis of the driving of compaction, the filling and compaction thickness is greater than 60 cm.