Helical
piling
PILING & FOUNDATIONS
Design & Build Helical Piling Driven Piling Micro Piling Soil Nailing Reinforced Concrete Piling Case Studies 
TV Mast Bletchley Lincoln Re-signalling M4 Newport
| Design & Build |
| Helical Piling |
| Driven Piling |
| Micro Piling |
| Soil Nailing |
| Reinforced Concrete |
| Piling Case Studies |
| TV Mast |
| Bletchley |
| Lincoln Re-signalling |
| M4 Newport |
Helical Piling
Helical Piled Foundations, or Screw Piles, were originally used over 200 years ago. They have not been widely used in modern-day construction until recently. Designers and clients are increasingly seeing the benefits of the screw pile system, which include:- Speed of installation.
- No curing time, so can be built upon as soon as the installation is complete.
- No spoil is created – where contaminated land is an issue this is a significant benefit.
- Modern excavators can be adapted to drive the screw piles so no piling platforms are needed.
- The environmental impact is low – noise is significantly lower than driven piles, there is very little or no ground vibration, no concrete is used, and there is no spoil to remove.
- Should, in the future, the foundation need removing, the piles can be removed and reused leaving very little damage to the landscape.
- Reusable.
- 100% recyclable.
- Work extremely well in both tension and compression.
What is a Helical Piled Foundation?
In simple terms the Helical pile is a steel tube, with a number of helical plates welded to the tube. The size and spacing of the plates is determined at the design stage. In general they are supplied in 2 metre sections and are bolted together as they are screwed into the ground by the use of a torque drive unit which can be attached to a modern excavator. The piles are screwed into the ground until design depth and torque is achieved. The torque is measured from a reading taken on the calibrated torque drive unit.Like traditional piles, helical piles can be incorporated into a concrete pile-cap or slab. This can either be cast-in-situ or dependent on size, pre-cast, again reducing the delay in curing time onsite.
A preferred method of ‘capping’ the piles is the use of a steel grillage which is bolted directly on to the piles. This eliminates the use of any concrete and provides the client with an instant foundation on which to build.
If required an Angel wing can be driven over the helical pile, this increases the piles lateral restraint. If soil types allow, certain foundation structures e.g. signal post foundations and CCTV mast foundations, can be installed using a single Angel Pile. The structure is then bolted directly to the pile via a transfer plate – an extremely quick and efficient method.
Terrawise would class themselves as UK leaders in the installation of helical piles, having installed over 2500 foundations on the Highway and Railway infrastructure.
Some of our clients include:-
- Carillion
- Bam Nuttall
- Balfour Beatty
- Volker
- Birse
- Colas
- Amey
- Babcock
- Morgan Sindall
- Screwfast Foundations