Screw Piling Foundations

Screwpile use with foundation types

Screw Piling is the perfect solution for various foundation types.

Reinforced concrete slabs
Strip foundations
Underpinning
Steel ring beam with block and beam floor

At USP we can work with any existing foundation designs and utilising our In-House Structural Engineer, we will value engineer any project to reduce loads, to help reduce the project cost and time on site for the client.

Call our office and talk to one of the USP team about your project. We would love to hear from you to see how we can help

Screwpile use with RC Slab (Reinforced Concrete)

Screw Piling works exceptionally well with RC Slabs. The nature of utilising screwpiling to take point loadings within certain areas of a slab where applicable means that the overall load of the building can be spread more efficiently with the screwpiles thus reducing excavation, time and material costs.

We predominantly offer the option of an RC slab with Piles to a lot of our projects due to their efficiency and speed of install. They are exceptionally suited to both new builds as well as extensions.

High clay areas work especially well with screwpile / RC Slab designs when used with a clay heave board under the concrete slab. This is vital when you look at the expansion and contraction within the ground as the ground 'moves' within dry spells and wet weather.

Where Tree roots are found near a site, we can design a piled/slab solution that moves with the ground or cantilevers as the trees develop, grow and work with the moisture in the ground.

Advantages

Reduction of site excavation against traditional strip foundations
Reduces muck away
Reduces time on site
Reducing heave within the ground under the concrete slab

Screwpile use with groundbeam / strip foundation

Ground beams / strip foundations work very well when incorporated with screw piles. We can value engineer an existing design to put screwpiles into a ground beam design to help reduce the loads.

We can design A393 steel mesh cages to sit around our screw piles, which again helps to reduce the amount of ground needed for excavation as well as vastly reducing the amount of concrete needed.

Typically strip foundations start at a minimum of 1m deep, but can go up to 3m deep sometimes more depending on ground conditions when excavation has started. By using our system, we can drastically reduce the need for such depths.

Advantages

Reduction in excavation depth
Reduction of muck away
Increase on loads supported
Faster turnaround of foundation installation on site

Screw Piles and steel ring beam solution

Screw Piling and steel ring beams are a fantastic solution where there are height issues for Finished Floor Levels, be it too low or additional height required. We use a particular steel section that is perfect to sit a block and beam floor design inside it. Giving you adequate ventilation underneath your foundation as well as reduction in overall height once the insulation and finished screed is installed. We can finish the steel in either a hot dipped galvanised or bitumen hand applied solution depending on Building Controls final decision.

Reduction in overall foundation height
Work well if a cantilever design is required
Excellent solution to install over existing drains or services
Very fast installation

We design, fabricate and install all steel work in our own fabrication workshop

Screw Piles and underpinning

Where underpinning is required due to subsidence of an existing building, it can be a very costly solution to do a traditional underpinning solution. Using Screw Piling with a custom made bespoke underpinned bracket is the perfect solution for underpinned requirements.

We would excavate an area roughly 500mm down from top of ground level to ascertain the location of the underpinning bracket, make the neccesary removal of existing foundation to make space for the pile cap, install a screwpile to the required torque setting. Then install the bespoke pile cap to then support the area where the subsidence has occured.

A less invasive method for underpinning against traditional solutions
Time sensitive
A more cost effective solution for difficult access