It is a tank foundation with a exc. bottom dia as 45m and depth about 4.5 meters. I am planning to use a loose soil layer as a blanket not to freeze the layer already compacted.
Water table is 1m below existing grade elevation, so I will be running a dewatering system as well.
The material is...
I have to excavate and backfill about 15000 m3 borrowpit sand. It has to be done during winter season and specs does not let us work below -5 Celcius. So I have to find out a way to keep the subgrade warm ready to go. Do you have any suggestions.
