Archive for the New Forest Category
With this project we were contacted firstly, in an advisory capacity by the architect and his engineer. Their original plan consisted of an extension to the property and too remove the roof, and build an additional storey.
The existing foundations were exposed, to verify their suitability to carry the additional load. Although the footings complied with width and depth, the ground underneath was very wet, and the clay soft and silty. Further testing was then carried out by way of two bore holes, and the results were handed over to us.
Due to the poor ground conditions, and since the existing schemes involved alterations to the ground floor layout, the client after consultation with her architect, decided upon an alternative scheme, of complete demolition and constructing a new dwelling off, Piled foundations. The house footprint will also be shifted to avoid removing the original footings.
Before being given the the contract, we helped with pricing the ground beams and Piling. Which enabled the client to understand where her budget would be going, even before they had decided to demolish the property. Due to the nature of the ground, the high water table/springs, and the loadings of the Piles, 220mm dia Steel Cased Bottom Driven Piles were the best option.
Poor access was also an issue on this site, as it was in the middle of the New Forest, and we had to negotiate fording a river, and 2 miles of rough track, which made our steel tube, and concrete deliveries challenging.
Scope of works:
*Piling mat, Pile positions and welfare facilities, were the main contractors responsibility on this project.
*Mobilise D500 and D1000h with 7.5t lorry suited to smaller access sites.
*Locate steel tube delivery and escort them to site.
*Install 32 No 220 Steel Cased Bottom Driven Piles to design depth.
*Cast all completed Piles with C35 concrete and reinforcement to our engineers design specifications.
*Place safety tops on all reinforcement.
*Clear site of rubbish and demobilise Rigs.
The D1000h Driven Piling Rig allows us to lift the driving weight over 3.0m, this means we can weld the tubes up in front, and can continually drive Piles without stopping.
This property has 2 fire places; when we arrived onsite, 2 of the piles in the fire place were too close together, so with a quick call to our engineer we were able to move the piles apart, so they were 3.5 times the diameter away from each other.
The first load of concrete is in, reinforcement inserted and safety caps placed on all protruding steel reinforcement.
All our sites are left clean and tidy, which makes the next stage of the project a lot easier for the next contractor.