Small Diameter Rotary Bored Piles

150 - 600mm dia to 20m deep

As a rotary auger causes minimal vibration it is ideal for use next to buildings or underground services without destabilisation. Tremmie techniques can be used if water is present. These highly mobile rigs are economic to use on large open sites with cohesive ground and good access. Smaller models are suitable for internal use. (The example shows the pile being formed using temporary casing to prevent sides collapsing or water entering the open bore).

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. The Grundomat or mini driven rig uses 150mm and 219mm casing and is suitable for use in and around buildings.

Continuous Flight Auger Piles

320mm - 450mm to 17m deep

A cost-effective way of piling through made ground, sands, gravels or any unstable water bearing strata, which eliminates the need for temporary casing and Tremmie techniques.

Tripod Bored Piles

300mm - 450mm to 20m deep

Suitable for all ground conditions especially where access, headroom and working space is limited. Electric rigs are used to minimise noise and pollution. Temporary casing avoids collapse or flooding and Tremmie techniques may also be used.