Piled R/C Rafts for Luxury Static Caravans, Polzeath Cornwall
Polzeath, North Cornwall, is a small seaside resort popular with holiday makers and surfers. Then a beach side piece of waste ground, is the ideal place to build a small static Luxury caravan site. As property and land prices are extremely high in this area, the need to use poor quality unused ground, that was before, thought of to be uneconomical to build upon, can now be utilized, improving the look of the town and providing accommodation for tourists.
Seven Luxury static homes are to be placed on this site, each with their own independent Piled R/C slab. The site is located at the base of the valley floor, close to the beach front, making the ground conditions very wet, due to high water table which is also affected tidally, with soft alluvial sands on top of the Polzeath slate formation.
In each individual 250mm R/C slab, there are 15 No, 150mm O/D Steel Cased Bottom Driven Piles, ( Driven piles displace the ground around them so there are no arisings to remove from site ) the piles were driven to a pre-determined set designed by our engineer based on the ground reports provided by the client. The piles were finished and concreted above the cut off level, which allows us to cut off any poor concrete. The Piling Platform installed by the clients builder was finished at top of blinding / underside of slab, allowing the us to construct the R/C slab from ground level, although we had to shutter the sides of the 250mm R/C slabs, no spoil was removed from this site saving the customer thousands of pounds in haulage.
Piled Extension in Frome, Somerset
There were many challenges on this job, the customer required 4 No triangular pads, each designed with 3 No 150mm dia Steel Cased Bottom Driven, Cast In situ Piles, to extend a 3 bedroom house. The extension is to be built between the existing house, and a public footpath, which means the new extension is triangular in shape and built right up to the perimeter fence. The access to site was down the 1.2m wide footpath, where all materials and equipment had to be manoeuvred. Upon further inspection it was found that the main sewer for the houses in the vicinity, was located under the corner of the existing dwelling and travelled down through the proposed extension. Advanced Mini Piling Systems redesigned the pad positions, and contacted the local water authorities, the answer was to move one of the pads, adding an extra pile, and pre boring all the Steel Cased Bottom Driven Piles, past the depth of the main sewer pipe, relieving the pipe of any pressure from the displaced material while the Piles were being driven.
The Piles in this pad were pre bored, beyond the depth of the mains sewer and had anti heave sleeve installed, which is the cardboard tube you can around the base of the Piles. The Piles were then driven to a pre-designed set, concreted with reinforcement, and then cut down to cut off level ( CoL ).