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FUNDEX bored piles are constructed in stamping boreholes without vibration and percussive impact on soils. No excavation needed, which allows its successful use in circumstances of dense city building-up.

The borehole is formed by rotary drilling using inventory casing pipe with screw-shaped metal drill head /mandrel fixed on its bottom end with a sealing gasket.

As the pipe is being driven, soils are moved aside and compacted until target depth is reached.

When drilling column reaches reference mark at the pile heel, prepared reinforcement cage is lowered inside the casing to the reference mark; internal volume of the casing pipe is filled with mixed concrete of the required class.

Then drilling pipe is pulled out from the ground, moving forward and rotating with amplitude of ±180˚. During casing pipe removal, the pile shaft is formed due to filling and compaction of concrete mix inside the borehole.

After casing pipe removal, the metal drilling head remains in the soil, and forms wide foundation of the pile (drive point).

Widened pile foot along with compaction of soils during borehole construction provides high bearing capacity of the FUNDEX bored piles.

The FUNDEX bored piles can be manufactured with diameter up to 620 mm and length up to 45 m.

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