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Geogrids are suitable for reinforcing various embankments and roadbeds, protecting slopes, and reinforcing tunnel walls. They are also used for reinforcing foundations of large airports, parking lots, and dockyards that bear long-term loads. Geogrids increase the bearing capacity of roadbeds and extend their service life. They prevent road surface collapse and cracking, maintaining a neat and aesthetically pleasing surface. Geogrids facilitate construction, saving time and labor, shortening construction periods, and reducing maintenance costs. They prevent culverts from cracking. Geogrids reinforce slopes and prevent soil erosion. They reduce the thickness of subgrade layers, saving costs. Geogrids support the stability of grass mats on slopes, creating a green environment. Geogrids effectively block the transmission of seismic forces and play a crucial role in enhancing the seismic stiffness, strength, and stability of embankments. The successful application of geogrids is expected to reduce various embankment defects common in high-intensity earthquake zones and improve the earthquake resistance and disaster reduction capabilities of roads. Current seismic design codes for highways and railways do not specify the seismic performance of embankments reinforced with geogrids. Research on the seismic effects, reinforcement capabilities, and mechanisms of geogrid-reinforced embankments is also scarce both domestically and internationally.

Construction Precautions

The geogrid surface should be relatively flat. After the paving layer has passed inspection, to prevent longitudinal skewing, first mark white lines or hanging lines on the paving layer according to the width, then begin paving. Fix the ends of the geogrid with nails (8 nails per meter width, evenly spaced). After fixing the ends, use a paving machine to slowly pull the geogrid forward. Manually tighten and straighten it every 10 meters until one roll is completed, then proceed with the next roll, repeating the same process. After completing one roll, use a 6T-10T roller to compact it once from the starting point in the forward direction. (If laying on the intermediate layer or leveling layer, a steel roller roller is recommended; if the grating is laid directly on the concrete pavement, a rubber roller roller is recommended.) For subsequent laying: use the roll length as the unit for the laying section length. After filling the section where the grating should be laid, check the overall laying quality again, and then continue laying the next section. When laying the next section, the grating can be overlapped by 10-15CM and fixed with iron nails or wooden wedges before continuing to lay the second section in the forward direction. And so on, with the same operating requirements as before.