When using the quota, the quantity of subgrade fill should include: subgrade excavation, fill, slope reinforcement, drainage system and other projects.

1. Subgrade excavation: including excavation, cleaning and transportation.

2. Filling: including filling and compaction.

3. Slope reinforcement: After subgrade filling, it is necessary to reinforce the slope to meet the design requirements and standards.

4. Drainage system: After the subgrade is filled, a drainage system is needed to drain the water in the subgrade.