In civil engineering, earthwork backfilling is a very important item. How to calculate it? Let me teach you
Backfill refers to the backfilling of trenches and foundation pits by taking soil locally, which is calculated in cubic meters according to the actual backfill volume.
Backfill of trenches and foundation pits shall be calculated by subtracting the volume of buried objects (including cushion, foundation, pipes, etc.) below the designed outdoor floor from the excavation volume.
The backfill of pipe trench shall be calculated by subtracting the volume of pipe diameter from the excavation volume. If the pipe diameter is less than m, the pipe volume will not be deducted; if the pipe diameter exceeds m, the pipe volume will be deducted according to the table.
Backfilling (tamping) soil shall be calculated according to the volume (compacted volume) after rolling or tamping.
Foundation backfill=foundation excavation volume - the volume buried in the foundation (all components below the outdoor terrace)
Safe backfilling=indoor net area * (indoor and outdoor floor height difference - indoor cushion, leveling layer, surface layer height)