There are many advantages to driven cased piles. They are simple and economical to drive with an internal drop hammer, there is less noise and thin casings can be used. They provide flexibility as piles can easily be cut or lengthened and casings can be supplied in any length and in a wide range of diameters and thickness. Casings are light but rigid enough to be transported and handled without the precautions needed with precast concrete piles. Cased piles can be installed in difficult site conditions

Driven cased piles 150mm - 600mm to 20m deep

Used on open sites where soft soils overlay more competent strata, permanently steel cased piles are driven with an internal drop hammer to achieve a solid set at depth. Suitable reinforcement is then added and the casing filled with concrete.

This is a displacement pile and creates no arisings. It is particularly useful when piling in contaminated ground as the expensive disposal exercise is avoided. It is also of use on restricted access sites when the removal of spoil is particularly awkward.

Driven cased piles 219 mm - 325 mm
This rig, with its optional auger attachment, pre-bores through harder layers of 1-2m before driving casings into 16m. This reduces surface vibrations to neighbouring properties. The rig is 1.80 metres wide and can therefore operate where there is limited access. The mast height is adjustable and can work within limited headroom constraints of 4.0 metres.
Smaller diameter driven cased piles are often used in domestic situations and concerns regarding vibration should not rule out this application.

Driven Cased Piles case study

Grundomat mini piles

The Grundomat or mini driven rig uses 150mm and 219mm casing and is suitable for use in and around buildings. This air-driven system vibrates steel casings down to strata that give suitable resistance. Casings are welded in small sections on site to attain the required depth and subsequently filled with concrete and steel reinforcement. This rig can operate in very restricted headroom and limited access situations. This method of piling creates no spoil to remove from site.

Grundomat mini piles case study