Continuous Flight Auger piling at night adjacent to a live railway. Reinforced piles provide a foundation for a heavy structure.
Continuous Flight Auger (CFA) piling which is quiet and low vibration is ideal for urban projects which are sensitive to environmental constraints, rail and road projects or small sites with limited access or clearance. Each pile is formed by screwing a continuous auger (long helical drill) into the ground to the required depth. Concrete is then pumped under pressure down the hollow stem of the auger to the bottom of the bore. Once pumping starts, the auger is progressively withdrawn bringing the excavated spoil to the surface. These operations are monitored in the driver's cab by advanced instrumentation systems which ensure the concrete column is correctly formed . When the auger and its load of soil are finally removed, steel reinforcement cages are installed in the concrete pile. A heavy structure, like a tall building or a bridge, is usually built on piles if the ground beneath its base does not have an adequate weight-bearing capacity to support the structure. The piled foundation becomes an integral part of the structure that carries and transfers the load of the structure to stable weight-bearing ground, which may be located at some depth below the ground surface Historically, piles were made from timber but now are more likely to be fabricated from steel or steel-reinforced concrete. Piles are drilled in a particular pattern and, once a section of piles is completed, a concrete ‘pile cap’ is formed over them which will distribute the weight of the structure evenly between the piles.
Size: 5120px × 3407px
Location: United Kingdom, UK
Photo credit: © qaphotos.com / Alamy / Afripics
License: Licensed
Model Released: No
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