Barrette pile is a type of drilled and cast-in-place pile, the distinctive characters of which are the shape and way of drilling. Grab-bucket or Hydrofraise type drilling tools are used for barrette pile construction. The size of these tools determines that of the piles. The simplest piles are made with one stroke of a standard size grab-bucket (or hydrofraise cutting drums). The sizes are : - width : 0.52, 0.62, 0.82, 1.02, 1.22, 1.52 m - length : 1.80, 2.20, 2.70, 3.0 m METHOD OF CARRYING OUT THE WORKS: Classically, it includes 3 stages : 1. drilling, 2. putting the reinforcements in place, 3. concreting. The drilling is generally done under a bentonitic slurry, like a classical diaphragm wall. Often, when the working platform is poor, simplified guide walls are used. After desanding the drilling slurry, the reinforcement cage is lowered into the trench. Concreting is done in the usual way with a tremie pipe. Depending on the size of the pile, several pipes may have to be used.
Posted on: Tue, 18 Mar 2014 09:04:22 +0000
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