Foundation drilling
or so-called Piling is the process of boring pile foundations into the ground beneath a building that is under construction. These piles transfer loads from the structure to the ground, helping to support it.
They are most often used when the ground under them is to weak, does not have the necessary mechanical indicators or has or there is a doubt about terrains prone to landslides, areas with a highly rugged relief, soils with low bearing capacity or areas with a high water level. But they are also used under normal soil conditions to take horizontal loads. Convenient method for foundation works, over water and also bridges.
Pile foundations are long, thin elements generally made of reinforced concrete. They transfer the load through weak, compressible material onto more compact, less compressible stiffer soil or rock at greater depth. The deep insertion of these elements ensures a sturdy base on which the construction project can take place.
The construction of the drilling is designed according to the needs and the way of its operation.
For some bored piles, the bottom of the hole is widened or under-reamed, creating a bulb at the end. A steel reinforcement cage is lowered into the hole before the concrete is placed or dropped in after the concrete has been poured.