EXECUTION OF CLASSIC DRILLED PILES WITH A DIAMETER FROM 400 TO 2000 MM, WITH AND WITHOUT CASINGS.
We perform drilled piles according to a system that transmits torsion and vertical pressure force to the drilling tool via a telescopic Kelly bar. Drilling is performed by rotary drilling equipment. By using various drilling tools (auger, bucket, etc.), this system can be applied to all types of soil, including rocks.
Piles of the required diameter are drilled at the axial distance as given in the project basis. Introductory column is placed exactly on the projected place of the pile, the verticality of the direction is checked, it is fixed, and then drilling can be started. After finishing drilling to predetermined depth, the reinforcement cage is inserted into it according to the project After that, pouring the concrete can start by using tremie method (from bottom to top). If there is groundwater, it is gradually raised by filling with concrete, whereby the top of the tremie pipe is immersed in concrete, min. 1-2 m. The concreting of pile must be strictly continuous without interrupting until concreting will be finished. Since concrete is continuously introduced into the casings, there is no mixing of concrete and soil, thus ensuring the continuity of the pile. In parallel with the concreting of the pile, the casings is gradually pulled out.
The size of the drilled piles allows them to receive horizontal forces in addition to the vertical load-bearing capacity. Load-bearing capacity is achieved by side friction along the pile shaft, and by bearing capacity of solid ground beneath pile toe.
The diameter of the pile dictates its vertical bearing capacity, so that for diameters from 400 mm to 2000 mm it is from 500 to 6000 kN.