Project London, United Kingdom

Keybridge House

Demolition of 'London's Ugliest Building'

Sector: Buildings

Piles were required in an existing basement prior to the demolition of the building and redevelopment of Keybridge House

Technical Specifications

Pile Type: Bored

Number of Piles: 67no.         

Diameter: 1050mm  

Depth: 19m

The Challenge

1050mm diameter piles were required in an existing basement, where the access was via a concrete ramp which was only available for a short period of time before being demolished. Following demolition of the ramp, the rig would have to be crane lifted out via a small shaft. In the basement, the piling operations would be required to be undertaken in just 5.0m of headroom. 

The project required Martello to install 67no. piles of up to 19m in depth and at 1050mm in diameter, working in the existing basement. The pile reinforcement had to be delivered in 4.2m long sections to fit down the shaft, and connected together to form 12.0m long cages for the piles. 

The Solution

Martello were able to provide their MP4003 piling rig, which was small enough to operate within the constraints of the basement, yet still able to construct 1050mm diameter piles. The rig was also capable of being stripped down to a weight of 10.2 tonnes to allow the handling crane to lift it out, via the access shaft. 

The Martello solution allowed demolition of existing building and basement foundations to progress concurrently creating saving on both cost and programme. 

Project details

Project name

Keybridge House




Large diameter bored pile under casing, Restricted access bored piling

Contract type



London, United Kingdom

Building Period

2016 - 2017

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