Pile trimming

The trimming eliminates the polluted/dirty concrete and a minimum of sound concrete above the cut-off level, over the full cross section of a pile (Standard EN 1536: Execution of special geotechnical works: bored piles). Trimming shall be carried out without damaging the concrete, reinforcement and instrumentation of the pile. The FPS (Federation of Piling Specialists) has prepared an excellent document about breaking down of piles, which includes the most relevant technologies for pile trimming. The … Read more

Reverse circulation drilling

“The reverse circulation drilling is generally used for large diameter piles and consists of returning the drilled material and flushing medium to the surface inside the drill pipes. The pressure and flow of the drilling fluid at, and immediately behind, the drilling bit effectively flushes the drilled material away from the bit and also prevents the borehole from collapsing. Further back from this the hydrostatic head of the drilling fluid ensures the stability of the … Read more