The trench for the circulating water pipes is deep enough
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Excavation of trench for DN2000 circulating water pipeline
What about DN2000? Do you consider it to be 200?
Many factors need to be considered regarding the depth of the trench; it may contain sewage, so gravity flow needs to be taken into account
At least steel sheet piles should be installed for protection; it would be even better to add more horizontal supports
The depth of the trench doesn’t seem sufficient. The pipeline has a diameter of 2 meters. What exactly is the design depth?
The depth, as estimated visually, should be over 5 meters; with three people standing there, a burial depth of two meters is guaranteed