During the time the tower crane installation, you need to calculate the bearing capacity of the foundation, if the foundation bearing capacity can not meet the design requirements of construction elevator, we need to reinforce the foundation, strengthening methods commonly used are the following:
1, the general treatment
Usually by compaction method, drainage consolidation method, soil replacement cushion method, vibratory compaction compaction method. Among them, soil replacement cushion method is more commonly used, mainly because of its low cost, but only for a thin layer of foundation weak areas.
2. Pile foundation
This method is costly, but the handling is better applied to the shallow soil area but not suitable for general processing method.
3. increase the base area
Only applies to on-site and foundation bearing capacity of foundation design requirements less the case.