The backfill around the reinforced concrete inspection well chamber should be carried out at the same time as the backfill of the pipeline groove; when it is inconvenient to carry out at the same time, the stress leaves the step stubble; the backfill compaction around the reinforced concrete inspection well chamber should be carried out symmetrically along the center of the well chamber, and must not leak; the backfill material should be compacted close to the well wall. Guangzhou reinforced concrete inspection well manufacturers introduce what matters need to be paid attention to in the backfill inspection well room.
First, after the pipeline is installed and passed the inspection and acceptance, the backfill work is carried out.
Second, when the solid wall support needs to be dismantled in the backfill, the method of first going down and then going up should be adopted.
Third, when backfilling, there should be no standing water in the trough, and no backfilling of silt, humus soil and organic matter. The backfill soil must not be sandwiched with large blocks of bricks and stones, and large pieces of soil must be crushed to less than 10 cm before they can be used for backfilling.
Fourth, the two sides of the pipe pit are backfilled with stone chips to the top of the pipe 30cm, and the backfill is carried out at the same time to prevent the displacement of the pipeline, and washed with water, the pipe top is more than 30cm backfilled soil and compacted in layers, and the compactness must meet the design requirements of the subgrade.
Fifth, the order of trench backfilling should be carried out according to the direction of ditch drainage from high to low, and the thickness of the virtual laying layer is 30cm.
Sixth, the replacement of sand pebbles should be layered according to the provisions with a flat plate vibrator or hand-held light rammer to tample, each layer of false paving thickness should not exceed 300mm.
