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Precautions for construction of geogrid
The paving surface of the geogrid should be relatively flat. After the paving layer has passed the acceptance, in order to prevent the longitudinal skew phenomenon, first draw a white line or hanging line on the paving layer according to the width, and then start the paving, and then use iron Fix the end of the grille with nails (8 nails per meter width, fixed at an even distance), after fixing the end of the grille, use a paving machine to slowly pull the grille forward, and carry out manual labor for every 10 meters long. Tighten and straighten once until one roll of grille is finished, and then lay the next roll. The operation is the same as before. After laying one roll, use a 6T-10T road roller to roll it from the starting point to the forward direction. ( Such as paving on the middle surface layer and leveling layer, it is appropriate to use a steel roller road roller; if the grille is directly laid on the concrete road, it is appropriate to use a rubber roller road roller. After the length of the section where the grille should be laid, check the paving quality as a whole, and then lay the next section. When the next section is laid, the grille and the grille can be overlapped with a length of 10-15CM. , and fix it with iron nails or wooden wedges and continue to lay the second section in the forward direction, and so on. The operation requirements are the same as before.
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Geogrid construction and laying method
Anchorage method: Fiberglass geogrid without self-adhesive enhances asphalt concrete pavement and prevents reflection cracks between pavement and pavement. Anchorage method can be used for construction, but it is advisable to lay fiberglass geogrid first, and then sprinkle hot asphalt for bonding.
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It is used for roadbed reinforcement, making granular fillers and grids interlocked together to form a stable plane, preventing filler subsidence, and dispersing vertical loads; multi-layer reinforcement can be used in areas with harsh geographical conditions.
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The base surface must be cleaned according to the design requirements, which is the key to ensure the anti-seepage effect, especially the debris such as sharp stones and tree roots should be completely removed. Use a tamper or tamper to tamp it tightly to make it compact and level.
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The historical development of geotextiles
The application of geotextiles abroad began as early as the 1960s. The United States is the country with the largest consumption of geotextiles in the world. In the early 1990s, its annual consumption was more than 300 million m2, and the consumption reached 700 million m2. Geotextiles in Europe and Japan have also developed rapidly. The annual consumption of geotextiles in Europe is also about 400 million m2, of which spunbond nonwovens account for about 60% of nonwoven geotextiles; Cloth applications have grown significantly. Among Japanese non-woven geotextiles, the spunbond method is the most used, accounting for about 60% of the total non-woven geotextiles, and mainly PET spunbond fabrics.
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