How is heat preservation achieved for the pipe trenches in the north during winter? ? ? ?
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How is insulation maintained for outdoor ducts (or drainage ditches) in the north during winter? ? ? ?
To be honest, I don’t know, and I’ve never heard of any insulation for ducts! Design a drainage pipe and bury it under permafrost.
What was said upstairs is correct – utility trenches generally don’t have anti-freezing measures, but the drainage pipes must be below the depth of freezing soil to prevent freezing. The meteorological and geological data used for design in various regions all include the parameter of permafrost depth, which you must be aware of.