This trench is filled with sand – what is being done?
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This post was last edited by Hasty Passerby on 2018-9-28 at 11:20. This trench is filled with sand; what’s going on here? I saw a scene on site; I wonder what work is being carried out there? Why do this? Please explain it in a way that makes sense! Thank you!
This should be the backfilling after the installation of underground non-metallic pipes. Sand is filled to protect the pipeline, ensuring even distribution of stress and preventing damage from sharp edges.
Known as flexible backfilling, it protects the pipes and also facilitates their maintenance
Fill the trench with sand to prevent the accumulation of flammable and explosive gases, as required by the fire protection design standards for petrochemical enterprises
Protect the left and right sides; a cover plate should be installed later
Trenches installed in explosion-proof areas should be filled with sand to ensure they are compact.
The trench in the explosion-hazardous area should be filled with sand to prevent the accumulation of flammable and explosive gases inside, thereby ensuring safety.
To prevent the accumulation of flammable and explosive gases in the trench, combustible gas detectors can also be installed there; however, this is rather complicated, so people tend to use sand for backfilling.
Filling the trench with sand is a normal procedure
I see wooden planks on top; they are used for passage, I guess. .