1. For the preparation work before subgrade construction, such as foundation cleaning, yard preparation, etc., the selected mechanical equipment mainly includes: pushers, excavators, loaders, graders, etc. When there are earthwork excavation and transportation tasks in the swamp area, the wetland pusher should be selected.

2. The mechanical equipment selected for earthwork excavation mainly includes bulldozers, scrapers, excavators, loaders and dump trucks.

3. For the stone excavation project, the selected mechanical equipment mainly includes excavators, bulldozers, mobile air compressors, rock drills and blasting equipment.

4. For the earthwork filling project, the mechanical equipment mainly includes bulldozers, scrapers, sheep foot rollers, rollers, sprinklers, graders and dump trucks.

5. Subgrade plastic engineering, the selected mechanical equipment mainly includes graders, bulldozers and excavators.