How deep is the backfill on the first floor?

Backfill should be based on the height of the building, mostly not more than 20 cm.

Residents on the first floor raised the ground for waterproof and moisture-proof reasons. Then consider the thickness of backfill soil. If the building is 3.5 meters high, it is no problem to backfill one meter. If the height between the roof and the ground is standardized to 2.8 meters, the backfill soil will be appropriately reduced to more than 10 cm. Too much backfill and too high ground make people feel uncomfortable.

Ground backfill material

1, waste residue backfilling

The advantages of waste residue backfilling are simple construction and low price. The disadvantage is that some floors are afraid of being overweight, and generally better properties are not allowed. Therefore, the backfilling of waste residue will be gradually eliminated.

2. Cement precast slab

When backfilling the cement precast slab, prepare the cement precast slab (which needs reinforcement) outside, then use bricks to overhead the precast slab, and then cover the precast slab on the caisson. This kind of price is slightly more expensive than waste residue backfilling, which is a trend of caisson treatment in the future. At present, some cities have requested that caissons be treated in this way.

3, light material backfill

Pearl rock wool ceramsite or foam brick should be used for backfilling sand and cement, but the price is a little higher. Because it is quite expensive to use pearl rock wool ceramsite or foam brick, most decoration companies use brick slag that knocks on the wall on the spot to backfill.