When manually backfilling a large area, use a rammer to ram. When two rammers are parallel, the distance between the foundations should not be less than 3m, and on the same ramming route, the distance between the front and back should not be less than 10m.
In the large area of manual backfilling, with a punching machine solid, two punching machine parallel, the base spacing must not be less than 3m, in the same line route, the front and rear spacing must not be less than 10m.
When a large area is backfilled manually, the rammer shall be used for tamping. When the two rammers are parallel, the foundation spacing shall not be less than 3m. On the same tamping line, the front and back spacing shall not be less than 10m.<br>