What is the meaning of in-situ tamping in construction engineering, and under what circumstances can this subtitle be applied?

"Original soil rammer" refers to the tamping of soil surface (such as the bottom of dug trench) in natural state. Work content: loosening soil, leveling, watering and tamping. Compaction of original soil is calculated in square meters according to the compacted area. It is a working procedure and a unique subtitle existing in manual excavation, and there is no need to calculate the actual volume of soil separately.

For comparison:

"Backfilling and tamping" refers to earth moving, backfilling, leveling and tamping. There are many items in the budget. There are core backfill, outdoor backfill, backfill outside the leveling site and so on. Compaction is calculated in cubic meters according to the compacted area.

Attached drawing: diagram of quota subtitle and quota set.

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