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Matters needing attention before and after paving geogrid

Matters needing attention before and after paving geogrid

  • Categories:NEWS
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  • Time of issue:2020-04-26
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(Summary description)Geogrid is a kind of superior geogrid used for ground lifting, old road reinforcement, foundation reinforcement and soft subgrade. The contents to be paid attention to before and after paving include:

Matters needing attention before and after paving geogrid

(Summary description)Geogrid is a kind of superior geogrid used for ground lifting, old road reinforcement, foundation reinforcement and soft subgrade. The contents to be paid attention to before and after paving include:

  • Categories:NEWS
  • Author:
  • Origin:
  • Time of issue:2020-04-26
  • Views:0
Information

Geogrid is a kind of superior geogrid used for ground lifting, old road reinforcement, foundation reinforcement and soft subgrade. The contents to be paid attention to before and after paving include:

1. Project site: it is required to compact, level and remove sharp protuberances.

2. Grid paving: on the flat and compacted site, the main stress direction (longitudinal) of the installed and paved grid shall be perpendicular to the axis direction of the embankment, and the paving shall be flat without wrinkles, and the grid shall be tensioned as much as possible. Fixed with dowels and earth rock ballast. The main stress direction of the paved grid is preferably full length without joint. The connection between the width and the width can be manually bound and lapped, and the lap width is not more than 10 cm. If the set grid is above two layers, the layers should be staggered. After most of the paving, the straightness shall be adjusted as a whole. After a layer of soil is filled, before rolling, the grid shall be tensioned again with manpower or machines and tools, and the force shall be average, so that the grid is in a straight stress state in the soil.

3. Use of filler: the filler shall be selected according to the design requirements. The diameter of the filler must be less than 15 cm, and the grading of the filler shall be controlled to ensure the compaction weight. It is proved by the test that all of them can be used as fillers except frozen soil layer, bog soil, urban dirt, chalk soil and diatomite. But the mechanical properties of gravel soil and sand soil are stable, and they are not affected by water content, so they should be selected first.

4. Spreading and compaction of filling materials: after the grid is paved and positioned, the filling materials shall be covered quickly, and the exposure time shall not exceed 2 days, and the flow work of filling while paving can also be used. First, pave the filler at both ends, fix the grid, and then advance to the middle.

 

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