The award of this prestigious GMP
design and construct contract followed 9 months of consultation , planning
and tendering. The new station is located on the main Glasgow to Edinburgh
railway line at Hermiston Gait to the west of the city. It serves both the
adjacent retail park and the office developments in Edinburgh Park. The
station was designed to a high specification, to match the quality of the
nearby office buildings. It includes passenger lifts, a footbridge, retail
facilities and impressive hard and soft landscaping. By using previous
station experience in the design process the amount of
possession working required was minimised.
Piling was required to support new modular platforms, a footbridge and
the entire station building and involved works on both sides of the track. Branlow used their small-scale mobile tracked rigs
equipped with short masts to work next to the live railway. The use of low
masts allowed areas of work to be undertaken in normal daylight hours
without affecting the operation of the railway. Some works did involve
piling during night shift possession periods. The chosen solution developed by Branlows involved the
installation of low noise low vibration piles using a bottom driven drop
hammer technique installed using Branlow's specialist minipiling rigs.
(Please see Branlow datasheets for further information on this technique and
our recently published Noise and Vibration datasheet which illustrates the
advantages of this method wherever noise and vibration are an issue). During the piling works a sophisticated monitoring
system was installed which monitored vibration levels to ensure the baseline
levels (compatible with trains passing) were not exceeded. The system
included an alarm but as the designated threshold levels were never exceeded
the alarm stayed silent. Scope of Piling Work:
Pile depths averaged 6m to 10m. The piling works were completed within 5 to 6 weeks.
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