Aberdeen Western Peripheral Route

Title: Aberdeen Western Peripheral Route

Client: AWPR CJV

Solutions: Rotary-Bored Piling, ODEX Piling

Quinn Piling were contracted by the AWPR Construction Joint Venture to undertake the installation of foundation piles for a motorway bridge structure near Goval Burn.

Quinn Piling were advised in early discussions that two piling sub-contractors on previous sections of the massive AWPR project where unable to adequately manage with piling in the hard granite rock and the project had suffered substantial delays and additional costs as a result. The AWPR CJV had been referred to Quinn Piling by another international contractor due to our wealth of experience in drilling and piling through similar rock in Scotland.

The works comprised the installation and testing of 32 no. 700mm diameter piles to a maximum depth of 18.5m and included rock sockets of 4m.

Quality Control measures consisted of a static load test to 3MN, with extensometers to analyse the pile performance at various depths. Two further piles were analysed with cross-hole sonic-logging, and all 32 piles were sonic-echo integrity-tested. As a further control on this large infrastructure project, AWPR CJV employed a geologist to inspect the arisings from the rock-socket of each pile and an independent piling expert to observe and approve the piling methodology.

Quinn Piling mobilised their Casagrande B250R and a heavy-duty 'Down-The-Hole' Hammer-Drill System (DTH) as a contingency in the event of encountering hard granite rock.

Ultimately, piling was completed ahead of programme and all pile toe-depths were achieved with Quinn Piling’s heavy-duty core-barrel digging tool, the DTH system not needing to be deployed on this occasion.

Quinn Piling Limited  © 2018 All Rights Reserved.

Quinn Piling Limited is a limited company registered in Northern Ireland. Company Registration No. NI041458
Registered Office: 15 Enterprise Avenue Down Business Park 46 Belfast Road Downpatrick BT30 9UP