|
|
Keller's Augercast Continuous Flight Auger (CFA) piling system provides a quiet low vibration form of piling that is ideal for providing foundation support in built-up or environmentally sensitive areas.
Keller's CFA rigs can construct piles in most soils including sands, gravels, silts, clays, chalk and weak bedrock, in high water tables without the need for temporary support systems.
|
|
Covered in the New Spanish Technical Code for Building (CTE-2006) as rotation displacement piles, the Omega pile driving system is based on rotation and pushing the head of the displacement auger when driving it and rotating and pulling the tool when extracting it. Piles are installed in a total absence of vibration and produce sideways displacement of the soil, thereby compacting it and avoiding the need to remove debris.
Above the maximum diameter of the head, horizontal propellers and suitable tilt of the upper angle produce a second displacement of the soil during the extraction process and concreting. In this stage, the controlled pressure of the concrete injected through the centre pipe induces a third displacement and ensures perfect adherence of the pile with the ground.
|
|
|
|
|
|
TRELICON technology joins the advantages of fixed piles with the versatility of application of drilled piles. A perfect method for projects in urban centres, as it eliminates vibration and disturbance to adjacent structures and reduces noise emissions. TRELICON piles make it possible to avoid decompressing the soil and using bentonite mud for drilling. This greatly simplifies the disposal of debris. Thanks to its constant technical improvement, this technology has significantly broadened its fields of application, allowing for a much wider range of diameters and lengths.
Operating specifications
The operating phases entail digging the pile by driving a continuous blade assembled on a central hollow pipe. At the end of the digging phases, extraction of the blade occurs at the same time concrete is poured by pumping from inside the same blade. When required, piles may be reinforced for their entire length with reinforcement cages inserted in the still wet concrete.
Technical data
Pile diameter: 400 to 1400 mm
Depth: 25 ÷ 36 meters (with blade loader) depending on soil diameter and consistency.
|
|
|
The improvement of poor soils by depth vibrators is an innovation of Keller. For the treatment of non-cohesive and cohesive soil formations different types of depth vibrators and various techniques are available. Together with the different methods of soil improvement a wide range of pile foundations and similar foundation techniques are available.
|
|
"Pious realized by means of a drill with hollow axis screwed in the ground without notable extraction of the ground, the drill is then extracted from the ground without unscrewing while, simultaneously, the concrete is injected by the hollow axis of the drill."
|
|
|
|
