Twisted Case Secant Pile (TCSP) Piling
The 'Twisted Case Secant Pile' system (TCSP) is an extension of the traditional Continuous Flight Auger (CFA) technique and allows the piling rig to drill both a steel casing and continuous flight auger into the ground at the same time.
The system has been developed by Llamada for secant wall installation where high construction tolerances are required, but also where the installation speed of a CFA technique is important.
In addition the system can be used to mitigate the phenomenon of 'flighting' of near surface soft ground when drilling deep CFA pile.
P J Edwards own two rigs with this capability and can achieve cased diameters up to 1000mm.