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1. Firstly, accurately set out the slope line of the roadbed. In order to ensure the width of the roadbed, each side is widened by 0.5m. After leveling the dried base soil, use a 25T vibrating roller to static press twice. Then use 50T vibration pressure four times, and manually level the uneven areas.
2. Pave 0.3m thick medium, coarse, and sand, and manually level with machinery. Static pressure twice with a 25T vibrating roller.
3. Lay geogrid. When laying geogrids, the bottom surface should be flat, dense, and generally flat. Straighten, do not overlap, do not curl, twist, and overlap the adjacent geogrids by 0.2m. The overlapping parts of the geogrids should be connected with 8 # iron wires every 1 meter along the horizontal direction of the roadbed, and placed on the laid geogrids. Fix to the ground with U-nails every 1.5-2m.
4. After the first layer of geogrid is laid, the second layer of 0.2m thick medium, coarse, and sand is filled. The method is to transport the sand to the construction site and unload it on one side of the roadbed, and then use a bulldozer to push forward. First, fill 0.1m within a range of 2 meters on both sides of the roadbed, then fold the first layer of geogrid up and fill it with 0.1m of medium, coarse, and sand. Prohibit filling and pushing from both sides to the middle, and prohibit various machinery from passing through and operating on the geogrid without filling, coarse, and sand. This can ensure that the geogrid is flat, not bulging, or wrinkling, and wait for the second layer of medium, coarse, and sand to be leveled. Horizontal measurement should be carried out to prevent uneven filling thickness. After leveling without any errors, a 25T vibrating roller should be used for static pressure twice.
5. The construction method of the second layer of geogrid is the same as that of the first layer. Finally, fill 0.3m of medium, coarse, and sand with the same filling method as the first layer. After two passes of static pressure with a 25T roller, the reinforcement of the roadbed base is completed.
6. After the third layer of medium, coarse, and sand is compacted, two geogrids are laid longitudinally along the line on both sides of the slope, overlapping by 0.16m, and connected using the same method before starting the earthwork construction operation. Lay geogrids for slope protection. The edge lines laid must be measured on each layer. Each side should ensure that the geogrid is buried within 0.10m of the slope after slope renovation.
7. When filling two layers of soil with a thickness of 0.8m, a layer of geogrid needs to be laid on both sides of the slope at the same time. Then, and so on, until it is laid under the soil on the surface of the road shoulder.
8. After the roadbed is filled, the slope should be repaired in a timely manner. And provide dry rubble protection at the foot of the slope. In addition to widening each side by 0.3m, a settlement of 1.5% is also reserved for this section of the roadbed.