Fertilizer tank backfill top elevation to where

Fertilizer tank backfill top elevation to outdoor floor. The height of the fertilizer tank backfill is from the bottom elevation of the bedding layer to the outdoor floor. Because there is no bedding on the working surface. Fertilizer tank backfill, must be cleaned to the base bottom elevation, will fall back to the loose soil, mortar, gravel, etc. to remove clean. Check whether the water content of the backfilled soil is within the control range. If the water content is high, measures such as loosening, drying, or uniformly mixing dry soil can be used. If the water content of backfill soil is low, measures such as sprinkling water in advance to moisten can be adopted. Backfill should be spread in layers. The thickness and length of each layer should be determined according to the soil quality, compactness requirements and machine performance. General frog type tamping machine each layer of paving thickness of 200 ~ 250mm. artificial tamping is not greater than 200mm. after each layer of paving, and then rake flat.