The foundation erected on piles during operation will experience compressive and tensile stresses. In order to withstand the compressive stress that emanates from the main structure of the house, the piles are laid to a considerable depth above 1.5-2 m. In addition to the depth, you need to calculate the required number of piles themselves, which will be required for each specific building on the selected soil type. If these two requirements are met, the piles will completely cope with opposition to compressive loads and will not be deformed.
The situation is quite different if the laying of bored piles occurs on heaving soil, which is very common. In this case, the piles will experience heavy tensile loads. Observing the required depth for piles and setting the required number of them does not solve this problem. (more…)