Use of propriety propping at a site in the City of London is helping to preserve an elegant façade behind the new home of the Worshipful Company of Leathersellers and prevent impact on surrounding developments.
Specialist contractor O’Keefe is using 22 Groundforce MP250 hydraulic props to help main contractor Brookfield Muliplex construct the two storey basement on the new development.
Poor ground conditions and close proximity to sensitive buildings, including the 800 year old Grade I listed Church of St Helens Bishopsgate, meant that the scheme is highly challenging and temporary propping was vital. Minimising ground movement was esential to protect the surrounding buildings and avoid damage to the 19th century Portland Stone façade behind which the new building is being constructed.
The new basement has been formed using a secant piled wall topped with a concrete ring beam with special bearing blocks cast into it to create perpendicular restraints for the installation for the MP250 props.