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Large diameter bored pile with enlarged base
In stiff cohesive soils, bored piles can possibly be “under-reamed”: the belling technique may prove economical to take advantage of an enlarged pile base with increased end bearing capacity. Large diameter bored piles with an enlarged base or underream are also known as ‘bell out’ piles.
Construction sequence
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Fields of application
• Foundation for heavily loaded columns
• Direct contact pile – column
• Withstand very high loads or horizontal moments
• Resist high traction values
• The nature of the soil at design depth should allow for the formation of an enlarged pile base
Environmental impact
• Vibration-free installation
• Low noise pollution
• Removal of spoil (pile with soil extraction) and of drilling and/or support fluid from the job site is required
• The water table must be located at least 1 m below the working level
• Workspace surface minimum requirement of 17 m: minimal 15 m from the axis of the wall and 2 m in front of the wall
• A stable, dry and flat work platform is required