Project Snapshot
- Type: Residential single-storey house extension
- Location: Davenport, Stockport
- Piles: 7 x 150mm (auguring required on 3/7)
- Beam: 13.5m
- Concrete: 2.8m3 of grade C35
THE CHALLENGE
On this site, there was a live main drain for all the houses on this side of the street. It was encroaching on the trench slightly but enough to require pre-auguring. This ensures that the drainage is not affected by driving piles, as we couldn’t risk damaging it.
Two pits had been excavated to reveal the location of the drain, and an augur drill was used to plumb a pilot hole for the piles to be driven.
WHAT WE DID
Piling
Once we had successfully augured the first three holes, we got to work with our tried-and-true mini piling method of using a pneumatic mole to drive our 150mm-diameter piles to depths of 2-4 metres. There were a total of seven piles necessary for the job.
Steel Ring Beam
The ring beam cages were 500mm x 350mm in size, and we used a total of 13.5 metres to give the foundations an added element of strength. Like all of our sites, we always allow for at least 50mm of clearance around the ring beam. This is because when it’s entombed in concrete, no part of the ring beam can be exposed or it will eventually rust.
Concrete
We employed the help of Rhino Concrete to supply us with a high quality grade C35 (the standard grade for load-bearing applications) paired with their excellent overall service. Chris from Rhino Piling assisted with barrowing the concrete where necessary, to speed up the process. In total this job used 2.8 cubic metres of concrete and took around 40 minutes to install.
THE OUTCOME
This job was predicted to take two days but we managed to complete it in less than one working day. Our customer was very pleased, and despite having to pre-augur three of the piles, it didn’t slow our piling team down.
If you want to see more jobs we’ve completed, check out our Recent Projects page here.
Phone: 0161 706 0365 | Email: enquiries@rhinopiling.co.uk
