Drilled DTH Piles

What are Drilled DTH Piles?

In piling, DTH (Down The Hole Hammer) drilled piles: A rotary percussive hammer as shown in the image below is used for drilling in various ground conditions including boulders and far into rock.

These piles can act as both friction and end bearing piles, but will generally be end bearing. Such drilled holes can either be temporarily cased or permanently cased. DTH drilled piles are generally used where the pile are in tension rather than compression.

Drilled Dth Pile Hole

Drilled Dth Pile holes

Upon reaching the design depth, the hole is cleared of any loose stones using a compressor. Steel reinforcement is then placed and concrete is poured in the bore and brought up to the required level. The casing can be withdrawn or left in situ. This type of pile is often used in tension for resisting uplift forces from basement floors, tower foundations and bridge structures. Rigs can also operate in restricted access conditions and construct high capacity piles where ground conditions are appropriate.

Contact us for Drilled Dth Piles

If you are in the public sector, a developer or a contractor, and you are considering working with us in relation to piling and specifically drilled dth piles, contact us in our Dublin office on 01 6310300 or in our Cork office on 021 4345999.