Medway NHS Trust is constructing a new ophthalmology ward in the grounds of Medway Maritime Hospital at Gillingham, Kent, using piled foundations to overcome problems with underground services and poor ground conditions.
As the site of the new ward is bounded on all sides by occupied hospital buildings with no passage for construction traffic, the only access was over the roof.
Withers Piling used a 100t mobile crane to lift its restricted access piling rig, power pack and ancillary equipment, together with 30t of sand and 15t of cement, over the hospital roof into the courtyard site, while operatives accessed the site via a scaffold walkway over the hospital roof.
Withers installed 28 augerbored piles measuring between 250mm and 300mm in diameter to depths of between 5.5m and 12m. Once drilled, the piles were reinforced and completed with a C40 sand/ cement grout.
www. withers-group. co. uk