Pre-Drilling for Sheet Pile

• Ground conditions are hard enough to slow production or cause sheets to fan out.
• Ground conditions are too hard for thin sheets and pre-drilling is cheaper than using thicker sheets.
• Using a larger vibro hammer could drive the sheets in but may damage the interlocks or tear the top of the sheets.
• Ground layers are sloped to the extent that sheets want to follow and not stay straight.

• A reduction in the surface friction and/or tip resistance.
• An increase in production rates.
• A reduction (or avoidance) in damage to sheet piles.
• A straighter pile wall as pre-drilled holes act as guides.
• The ability to see what is in the ground rather than relying on a bore log report.