Piling

Piled Walls: Contiguous & Secant

Contiguous piles

DW Clayfield construct piled walls as either contiguous (contig) or secant walls.

Typical uses include boundary retaining walls where ground disruption must be kept to a minimum, basement walls, temporary shoring during construction and ground stabilisation.

Contiguous Pile Walls

Contiguous piles are installed in a sequence determined by the boring conditions. The wall is not watertight, so measures may be needed to stop fine material washing out between the piles.

Each pile is reinforced with a steel cage designed to resist bending moments and shear. A range of pile diameters is available, so please ask for details.

Secant Pile Walls

The "female" piles are installed first, with gaps left between them, using a slow-gain (soft) concrete mix.

After a curing period of 2 to 4 days, the reinforced "male" piles are installed between them using a standard (hard) concrete mix. The male and female piles are designed to overlap.

The overlap between the piles prevents water movement and fines washing out. A secant wall is not fully watertight, but water flow is greatly reduced. Pile sizes and retained heights are similar to contiguous walls.